Prosecution Insights
Last updated: April 19, 2026
Application No. 17/332,193

EMBRYO TRANSFER TOOL AND EMBRYO TRANSFER DEVICE

Final Rejection §103§112
Filed
May 27, 2021
Examiner
TRAN, JULIE THI
Art Unit
3791
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Kitazato Corporation
OA Round
4 (Final)
19%
Grant Probability
At Risk
5-6
OA Rounds
4y 2m
To Grant
90%
With Interview

Examiner Intelligence

Grants only 19% of cases
19%
Career Allow Rate
7 granted / 36 resolved
-50.6% vs TC avg
Strong +70% interview lift
Without
With
+70.3%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
39 currently pending
Career history
75
Total Applications
across all art units

Statute-Specific Performance

§101
6.3%
-33.7% vs TC avg
§103
41.9%
+1.9% vs TC avg
§102
16.2%
-23.8% vs TC avg
§112
33.8%
-6.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 36 resolved cases

Office Action

§103 §112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Priority Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. Specification The lengthy specification has not been checked to the extent necessary to determine the presence of all possible minor errors. Applicant’s cooperation is requested in correcting any errors of which applicant may become aware in the specification. Drawings The drawings are objected to as failing to comply with 37 CFR 1.84(p)(4) because reference characters "11" and "21" have both been used to designate flexible tube. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Claim Objections Claims 9 and 11 are objected to because of the following informalities: Claim 9, line 4, “a second flexible and” should read --a second flexible tube--. Claim 11, lines 7 - 8, "microparticles, the first microparticle" should read --microparticles, wherein the first microparticle--. Claim 11, line 13, "microparticles, the second microparticle" should read --microparticles, wherein the second microparticle--. Claim 11, lines 15 - 16, "tube, the second microparticle" should read --tube, wherein the second microparticle--. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1 - 21 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1 and claim 21, the limitation "wherein the colorless and transparent synthetic resin forming the flexible tube is located between the inner surface of the flexible tube and the synthetic resin forming the first microparticle-containing synthetic resin portion as seen in the transverse cross section of the flexible tube: wherein the colorless and transparent synthetic resin forming the flexible tube is located between the outer surface of the flexible tube and the synthetic resin forming the first microparticle-containing synthetic resin portion as seen in the transverse cross section of the flexible tube: wherein the colorless and transparent synthetic resin forming the flexible tube is located between the inner surface of the flexible tube and the synthetic resin forming the second microparticle-containing synthetic resin portion as seen in the transverse cross section of the flexible tube: and wherein the colorless and transparent synthetic resin forming the flexible tube is the second microparticle-containing synthetic resin portion as seen in the transverse cross-section of the flexible tube, located between the outer surface of the flexible tube and the synthetic resin forming" is unclear with how it is currently written and raises the question how is the first the outer and inner tube form the first portion but then the outer and inner form the second portion as well and are the portions supposed to be separate. Examiner interprets this limitation pertaining to applicant’s Figure 6. If applicant is using this limitation claiming Figure 6, this does not overcome prior art. See rejection below. Claim 1 and claim 21, the limitation " the synthetic resin forming the first microparticle-containing synthetic resin portion having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube: the synthetic resin forming the second microparticle-containing synthetic resin portion having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube: the first and second microparticle-containing synthetic resin portions have a flexibility equivalent to the flexibility of the flexible tube" is unclear as it conflicts with each other and raises the question how is the flexibility is higher as well as equivalent to the flexible tube. Claim 2, line 4, and claim 12, line 4, the limitation “weight of the synthetic resin” is indefinite as it raises the question if “the synthetic resin” refer to that of “the first microparticle-containing synthetic resin portion” or “the second microparticle-containing synthetic resin portion” or both, or the “synthetic resin” of the flexible tube as recited at line 2 of claim 1. Claim 9 recites the limitation "the second flexible tube of the sheath" in line 8. There is insufficient antecedent basis for this limitation in the claim. Claim 11, lines 42 – 44, the limitation “in the first microparticle-containing portion to the volume of the optically transparent hollow glass beads in the second microparticle-containing” is unclear as it raises the question what this limitation entails. Examiner suggests applicant amend this limitation to read -- in the first microparticle-containing portion to the volume of the optically transparent hollow glass beads and in the second microparticle-containing-- if that is applicant’s intention. Claim 19, the limitation “harder than” renders the claim indefinite as it raises the question what the meters/bounds of “harder than” are. Examiner suggests applicant to amend “harder than” to read --harder than—with respect to the material for forming the flexible tubes if that is the applicant’s intention. See Andrew Corp. v. Gabriel Electronics, 847 F.2d 819, 6 USPQ2d 2010 (Fed. Cir. 1988). Claim 21 recites the limitation “(90% yield pressure resistance)” in line 4. It is unclear whether the claim requires the limitation within the paratheses or not. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 4 – 5 and 14 - 15 are rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claims 4 and 5 are dependent on claim 1 and failed to further limit a parent claim. Claims 14 and 15 are dependent on claim 11 and failed to further limit a parent claim. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1 and 3 – 10 are rejected under 35 U.S.C. 103 as being unpatentable over Futoshi (WO 2017038557 A1, see attached translation) in view of Field (US 20030040756 A1). Regarding claim 1, Futoshi teaches an embryo transfer tool (“instrument 1 for embryo transplantation”, abstract) comprising: a flexible tube (“flexible tube 21”, page 6, paragraph 2) that is made of a colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2), the flexible tube (21) having a longitudinal extent and a central axis that extends along the longitudinal extent of the flexible tube (21) (Figure 7), the flexible tube (21) including a lumen (cavity of “flexible tube 11”, Figure 7) that extends along at least a part of the longitudinal extent of the flexible tube (21) (Figure 7), the flexible tube (21) having an inner surface surrounding the lumen and also having an outer surface facing away from the lumen (Figure 7); and a hub (“hub 12”, page 5, paragraph 5) that is provided at a proximal end portion of the flexible tube (21) (Figure 7), wherein the flexible tube (21) includes: a first microparticle-containing synthetic resin portion (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1) comprised of synthetic resin containing microparticles that are optically transparent hollow beads (“bubbles”, page 3, paragraph 3), the first microparticle-containing synthetic resin portion (13a) having a predetermined width (Figure 6 shows 13a at a predetermined width) and extends extending over a predetermined length from a distal end portion of the flexible tube (21) toward a proximal end of the flexible tube (21) (page 3, paragraph 2; Figure 1), the first microparticle-containing synthetic resin portion (13a) having an outer periphery as seen in a transverse cross-section of the flexible tube (21) that is transverse to the central axis of the flexible tube (21) and that passes through the first microparticle-containing synthetic resin portion (13a) (Figure 6); a second microparticle-containing synthetic resin portion (“second bubble-containing surface layer” 13b, page 3, paragraph 2) comprised of synthetic resin that contains microparticles that are optically transparent hollow beads (“bubbles”, page 3, paragraph 3), the second microparticle-containing synthetic resin portion (13b) having a predetermined width (Figure 6 shows 13b at a predetermined width), extending from the distal end portion of the flexible tube (21) toward the proximal end of the flexible tube (21) (“A second bubble-containing surface layer 13b facing 13a, located between the first bubble-containing surface layer 13a and the second bubble-containing surface layer 13b, extending a predetermined length from the distal end of the flexible tube 11 toward the proximal end”, page 3, paragraph 2), and being opposed to the first microparticle-containing synthetic resin portion (13a) (Figure 6 shows 13b is on the opposing side from 13a), the second microparticle-containing synthetic resin portion (13b) having an outer periphery as seen in the transverse cross-section of the flexible tube (21) (Figure 6); a first microparticle-free portion (“first colorless and transparent portion” 15a, page 3, paragraph 2) comprised of synthetic resin (“…polyolefin (for example, polyethylene, polypropylene, ethylene-propylene copolymer)…”, page 6, paragraph 2) that is free of microparticles (Figures 1, 5 and 6), the first microparticle-free portion being colorless, transparent (13a) and positioned between the first microparticle-containing synthetic resin portion (13a) and the second microparticle-containing synthetic resin portion (13b) (Figures 1; 5 and 6), the first microparticle-free portion (15a) extending over a predetermined length from a distal end of the flexible tube (21) toward the proximal end of the flexible tube (21) (Figures 1; 5 and 6); and a second microparticle-free portion comprised of synthetic resin (“a second colorless and transparent portion” 15b, page 3, paragraph 2) that is free of microparticles (Figures 1, 5 and 6), the second microparticle-free portion (15b) being colorless, transparent and positioned in opposing relation to the first microparticle-free portion (15a) (Figure 6 shows 15b is on the opposing side from 15a), so that the outer periphery of the first microparticle-containing synthetic resin portion (13a) and the outer periphery of the second microparticle-containing synthetic resin portion (13b) are spaced from the outer surface of the flexible tube (21) as seen in the transverse cross-section (Figure 6) and so that the outer periphery of the first microparticle-containing synthetic resin portion (13a) and the outer periphery of the second microparticle-containing synthetic resin portion (13b) are spaced from the inner surface of the flexible tube as seen in the transverse cross-section (Figure 6), the synthetic resin of the first and second microparticle-containing synthetic resin portions (respectively, 13a and 13b) being a colorless and transparent synthetic resin (page 3, paragraph 6; Examiner interprets the “soft tube 11” contains the “a first bubble-containing surface layer 13a” and “second bubble-containing surface layer 13b” and can be made of colorless and transparent resin such as “polyolefin (polyethylene, polypropylene)”.) the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube (21) (“As a material for forming the flexible tube 21, a material that is harder than the soft tube 11 and has a certain degree of shape retention and flexibility is used.”, (page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions (page 6, paragraph 7) and that harder material has less flexibility.): the synthetic resin forming the second microparticle-containing synthetic resin portion (13b) having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube (21) (“As a material for forming the flexible tube 21, a material that is harder than the soft tube 11 and has a certain degree of shape retention and flexibility is used.”, (page 6, paragraph 2); Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions (page 6, paragraph 7) and that harder material has less flexibility.): the first and second microparticle-containing synthetic resin portions (respectively, 13a and 13b, page 3, paragraph 2) have a flexibility equivalent to the flexibility of the flexible tube (21) ((“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”; Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation “has flexibility that is equivalent to flexibility”.); wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the inner surface of the flexible tube (21) and the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the outer surface of the flexible tube (21) and the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the inner surface of the flexible tube (21) and the synthetic resin forming the second microparticle-containing synthetic resin portion (13b) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): and wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the outer surface of the flexible tube (21) and the synthetic resin forming the second microparticle-containing synthetic resin portion (13b) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6). PNG media_image1.png 492 722 media_image1.png Greyscale Futoshi does not teach the microparticle-containing synthetic resin portions are positioned within an inner wall of the flexible tube, are not exposed on an outer surface and an inner surface of the flexible tube, and the optically transparent hollow glass beads having a diameter of 0.5 to 200 μm, the optically transparent hollow glass beads are dispersed in the synthetic resin, and the microparticle-containing synthetic resin portions including boundary surfaces that are formed between the synthetic resin and the optically transparent hollow glass beads. However, Field discloses an “embryo replacement catheter has a flexible extruded shaft of a transparent polyurethane with a bore extending along its length” and teaches the microparticle-containing synthetic resin portions (Figure 2) are positioned within an inner wall ([0018], Figure 2) of the flexible tube (“extruded shaft”, [0008]), are not exposed on an outer surface and an inner surface of the flexible tube (“the outer surface of the device may be smooth and uninterrupted by gas bubbles, and the device may have an inner surface that is smooth and uninterrupted by gas bubbles”, [0007]; Figure 2), and the optically transparent hollow glass beads (“The bubbles could be formed by the incorporation of hollow microspheres of resin or glass.”, [0023]) having a diameter of 1 to 50 μm ([0023]), the optically transparent hollow glass beads ([0023]) are dispersed in the synthetic resin ([0023]), and the microparticle-containing synthetic resin portions (Figure 2) including boundary surfaces that are formed between the synthetic resin (“Polyurethane material 21”, [0020]) and the optically transparent hollow glass beads ([0023]). Examiner interprets that the outer surface and inner surface are uninterrupted by gas bubbles as well as at the distal end. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the embryo transfer tool of Futoshi to incorporate the microparticle-containing synthetic resin portions are positioned within an inner wall of the flexible tube, are not exposed on an outer surface and an inner surface of the flexible tube, and the optically transparent hollow glass beads having a diameter of 0.5 to 200 μm, the optically transparent hollow glass beads are dispersed in the synthetic resin, and the microparticle-containing synthetic resin portions including boundary surfaces that are formed between the synthetic resin and the optically transparent hollow glass beads, as taught by Field, for the benefit of preventing abrasions in patient’s and/or healthcare professional’s body when in use and “increase[ing] the visibility of the catheter under ultrasound imaging whilst still enabling material flowing along the catheter to be seen” (Field: abstract). Additionally, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the optically transparent hollow glass bead’s diameter of the embryo transfer tool of Futoshi such as a range of 1 to 50 μm, as taught by Field, for the benefit of increase the visibility of the device under ultrasound observation (Field: [0009]). Furthermore, it has been held that “[i]n the case where the claimed ranges ‘overlap or lie inside ranges disclosed by the prior art’ a prima facie case of obviousness exists. In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990).” See MPEP 2144.05(I). Applicant appears to have placed no criticality on the claimed range. Regarding claim 3, Futoshi and Field teach all limitations of claim 1. Futoshi teaches the synthetic resin forming the first and second microparticle-containing synthetic resin portions (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1; “second bubble-containing surface layer” 13b, page 3, paragraph 2) is the same as the colorless and transparent synthetic resin (“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”) forming the flexible tube (“flexible tube 21”, page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation “is same the colorless and transparent synthetic resin”. Regarding claim 4, Futoshi and Field teach all limitations of claim 1. Futoshi teaches the synthetic resin forming the first and second microparticle-containing synthetic resin portions has higher flexibility than the colorless and transparent synthetic resin forming the flexible tube (“flexible tube 21”, page 6, paragraph 2) (“As a material for forming the flexible tube 21, a material that is harder than the soft tube 11 and has a certain degree of shape retention and flexibility is used.”, page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions (page 6, paragraph 7) and that harder material has less flexibility. Regarding claim 5, Futoshi and Field teach all limitations of claim 1. Futoshi teaches the first and second microparticle-containing synthetic resin portions (respectively, “a first bubble-containing surface layer” 13a, page 3, paragraph 2, Figure 1; “second bubble-containing surface layer” 13b, page 3, paragraph 2) have a flexibility that is equivalent to flexibility of the synthetic resin forming the flexible tube (21) ((“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation “has flexibility that is equivalent to flexibility”. Regarding claim 6, Futoshi and Field teach all limitations of claim 1. Futoshi teaches the embryo transfer tool (“instrument 1 for embryo transplantation”, abstract). Futoshi does not teach the embryo transfer tool includes, at a distal end portion thereof, an annular transparent distal end portion that does not include the first and second microparticle-containing portions. However, Field discloses an “embryo replacement catheter has a flexible extruded shaft of a transparent polyurethane with a bore extending along its length” and teaches the embryo transfer tool (“embryo replacement catheter”, abstract) includes, at a distal end portion thereof, an annular transparent (“clear, transparent polyurethane material”, [0018]) distal end portion that does not include the first and second microparticle-containing portions (“the outer surface of the device may be smooth and uninterrupted by gas bubbles, and the device may have an inner surface that is smooth and uninterrupted by gas bubbles”, [0007]; Figure 2). Examiner interprets that the outer surface and inner surface are uninterrupted by gas bubbles as well as at the distal end. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the embryo transfer tool of Futoshi to incorporate at a distal end portion thereof, an annular transparent distal end portion that does not include the first and second microparticle-containing portions, as taught by Field, for the benefit of preventing abrasions in patient’s and/or healthcare professional’s body when in use. Regarding claim 7, Futoshi and Field teach all limitations of claim 1. Futoshi teaches a thickness of each of the first and second microparticle-containing synthetic resin portions is 1/5 to 1/3 of a thickness of the flexible tube (“flexible tube 21”, page 6, paragraph 2) (“thickness of the first and second bubble-containing surface layers is 1/5 to 1/3 of the thickness of the soft tube” page 6, paragraph 8). Regarding claim 8, Futoshi and Field teach all limitations of claim 1. Futoshi teaches a width of each of the first and second microparticle-containing synthetic resin portions is at least 30/100 of an outer circumferential length of the flexible tube (“the width of the first and second colorless and transparent portions is 30/100 or more of the outer peripheral length of the soft tube”, page 6, paragraph 7). Regarding claim 9, Futoshi and Field teach all limitations of claim 1. Futoshi teaches an embryo transfer device (“embryo transfer device 10”, page 5, paragraph 8) comprising: the embryo transfer tool (“instrument 1 for embryo transplantation”, abstract) according to claim 1, the flexible tube (“flexible tube 21”, page 6, paragraph 2) being a first flexible tube (21); and a sheath (“sheath” 2, page 5, paragraph 9) that includes a second flexible tube (“soft tube” 11, page 5, paragraph 9) and a sheath hub (“sheath hub” 22, page 5, paragraph 7) that is provided at a proximal end of the second flexible tube (11), the second flexible tube (“soft tube” 11, page 5, paragraph 9) being made of a material that is harder than a material from which the first flexible tube (21) of the embryo transfer tool (1) is made so that the second flexible tube (1) of the sheath is harder than the first flexible tube (21) of the embryo transfer tool (1) (“hard sheath”, page 2, paragraph 2; “hard resin”, page 5, paragraph 7; “For example, synthetic rubber such as urethane rubber, silicone rubber and butadiene rubber, natural rubber such as latex rubber, soft vinyl chloride, polyolefin (polyethylene, polypropylene). , Ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, a mixture of polypropylene and polyethylene or polybutene), polyester (polyethylene terephthalate, polybutylene terephthalate), polyamide, polyolefin elastomer, polyamide elastomer, styrene elastomer (for example, styrene) -Butadiene-styrene copolymer, styreneisoprene-styrene copolymer, styrene-ethylenebutylene-styrene copolymer), etc. Elastomers, polyurethanes, in particular thermoplastic polyurethanes (thermoplastic polyether polyurethanes, thermoplastic polyester polyurethanes, particularly preferably segmented thermoplastic polyether polyurethanes having a soft segment part and a hard segment part, more particularly soft As the main component of the segment, polytetramethylene ether glycol, polyethylene glycol, polypropylene glycol and the like are preferable, and as the main component of the hard segment, 1,4-butanediol and the like are preferable.”, page 3 paragraph 6), the sheath (2) accommodating the first flexible tube (21) with the distal end portion of the first flexible tube (21) projecting from the sheath (2) (Figure 7). Regarding claim 10, Futoshi and Field teach all limitations of claim 9. Futoshi teaches a portion of the first flexible tube (“flexible tube 21”, page 6, paragraph 2) projects from a distal end of the sheath (2), at least a part of the portion of the first flexible tube (21) that projects from the distal end of the sheath (2) including the first and second microparticle- containing synthetic resin portions (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1; “second bubble-containing surface layer” 13b, page 3, paragraph 2). Claim 2 is rejected under 35 U.S.C. 103 as being unpatentable over Futoshi in view of Field, as applied in claim 1, in view of Ogura (US 20100036201 A1). Regarding claim 2, Futoshi and Field teach all limitations of claim 1. Futoshi teaches the first and second microparticle-containing synthetic resin portions (respectively, 13a and 13b, page 3, paragraph 2) and optically clear hollow beads (“bubbles”, page 3, paragraph 3) but does not teach the microparticle-containing synthetic resin portion contains 0.5 - 5 parts by weight of the optically transparent hollow glass beads per 100 parts by weight of the synthetic resin However, Ogura discloses “an endoscopic flexible tube, including a spiral tube, a mesh tube covering the spiral tube, and a sheath coating the outer surface of the mesh tube, the sheath being composed of a sheathing resin material containing closed cells” (abstract) and teaches the microparticle-containing synthetic resin portion (“sheathing material”, [0040]) contains 45 or less parts by weight of the optically clear hollow glass beads (“hollow microspheres”, [0040]) per 100 parts by weight of the synthetic resin (“sheathing resin material”, [0040]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the microparticle-containing synthetic resin portions of the embryo transfer tool of Futoshi such as a range of 0.5 - 5, as taught by Ogura, for the benefit of reducing the specific gravity of the sheath to increase its elasticity while preventing embrittlement. Furthermore, it has been held that “[i]n the case where the claimed ranges ‘overlap or lie inside ranges disclosed by the prior art’ a prima facie case of obviousness exists. In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990).” See MPEP 2144.05(I). Applicant appears to have placed no criticality on the claimed range. Claims 11 and 13 - 20 are rejected under 35 U.S.C. 103 as being unpatentable over Futoshi in view of Field in view of Matsubara et al (US 20020004111 A1, hereinafter Matsubara) in further view of Qiao et al (2015, hereinafter Qiao; NPL: U). Regarding claim 11, Futoshi teaches an embryo transfer tool (“instrument 1 for embryo transplantation”, abstract) comprising: a flexible tube (“flexible tube 21”, page 6, paragraph 2) that is made of a colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2), the flexible tube (21) having an outer surface and an inner surface (Figure 7); and a hub (“hub 12”, page 5, paragraph 5) that is provided at a proximal end portion of the flexible tube (21), wherein the flexible tube (21) includes: a first microparticle-containing synthetic resin portion (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1) that is made of synthetic resin containing optically transparent hollow beads as microparticles (“bubbles”, page 3, paragraph 3), the first microparticle-containing synthetic resin portion having a predetermined width (Figure 6 shows 13b at a predetermined width) and extending over a predetermined length from a distal end portion of the flexible tube toward a proximal end of the flexible tube (21) (page 3, paragraph 2; Figure 1); a second microparticle-containing synthetic resin portion (“second bubble-containing surface layer” 13b, page 3, paragraph 2) that is made of synthetic resin containing optically transparent hollow beads as microparticles (“bubbles”, page 3, paragraph 3), the second microparticle-containing synthetic resin portion having a predetermined width extending from the distal end portion of the flexible tube (21) toward the proximal end of the flexible tube (21) (“A second bubble-containing surface layer 13b facing 13a, located between the first bubble-containing surface layer 13a and the second bubble-containing surface layer 13b, extending a predetermined length from the distal end of the flexible tube 11 toward the proximal end”, page 3, paragraph 2), the second microparticle-containing synthetic resing portion opposed to the first microparticle containing synthetic resin portion (13a) (Figure 6 shows 13b is on the opposing side from 13a); a first microparticle-free portion (“first colorless and transparent portion” 15a, page 3, paragraph 2) that is made of synthetic resin (“…polyolefin (for example, polyethylene, polypropylene, ethylene-propylene copolymer)…”, page 6, paragraph 2) free of any microparticles (Figures 1, 5 and 6), that is colorless, transparent and positioned between the first microparticle-containing synthetic resin portion (13a) and the second microparticle-containing synthetic resin portion (13b), and that extends over a predetermined length from a distal end of the flexible tube (21) toward the proximal end (Figures 1; 5 and 6); a second microparticle-free portion (“a second colorless and transparent portion” 15b, page 3, paragraph 2) that is made of synthetic resin free of any microparticles (Figures 1, 5 and 6), and is colorless, transparent and positioned in opposing relation to the first microparticle-free portion (15a) (Figure 6 shows 15b is on the opposing side from 15a); the first and second microparticle-containing synthetic resin portions (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1; “second bubble-containing surface layer” 13b, page 3, paragraph 2) being formed by a colorless and transparent synthetic resin ((“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”); Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation.) the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube (21) (“As a material for forming the flexible tube 21, a material that is harder than the soft tube 11 and has a certain degree of shape retention and flexibility is used.”, (page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions (page 6, paragraph 7) and that harder material has less flexibility.): the synthetic resin forming the second microparticle-containing synthetic resin portion (13b) having higher flexibility than the colorless and transparent synthetic resin forming the flexible tube (21) (“As a material for forming the flexible tube 21, a material that is harder than the soft tube 11 and has a certain degree of shape retention and flexibility is used.”, (page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions (page 6, paragraph 7) and that harder material has less flexibility.): the first and second microparticle-containing synthetic resin portions (respectively, 13a and 13b, page 3, paragraph 2) have a flexibility equivalent to the flexibility of the flexible tube (21) ((“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”; Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation “has flexibility that is equivalent to flexibility”.): wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the inner surface of the flexible tube (21) and the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) as seen in a transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the outer surface of the flexible tube (21) and the synthetic resin forming the first microparticle-containing synthetic resin portion (13a) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): wherein the colorless and transparent synthetic resin forming the flexible tube is located between the inner surface of the flexible tube and the synthetic resin forming the second microparticle-containing synthetic resin portion as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6): and wherein the colorless and transparent synthetic resin (“Examples of the material for forming the flexible tube 21 include polyester, polyolefin (for example, polyethylene, polypropylene ethylene-propylene copolymer), polyamide (for example, 6 nylon, 66 nylon), polyester (for example, polyethylene terephthalate), fluororesin (for example, , PTFE, ETFE) and the like can be used”, page 6, paragraph 2) forming the flexible tube (21) is located between the outer surface of the flexible tube (21) and the synthetic resin forming the second microparticle-containing synthetic resin portion (13b) as seen in the transverse cross-section of the flexible tube (21) (see annotated Futoshi’s Figure 6). Futoshi does not teach the microparticle-containing synthetic resin portions are positioned within an inner wall of the flexible tube, having an outer periphery that faces towards and is spaced from the inner surface and the outer surface of the flexible tube so that the outer periphery of the microparticle-containing synthetic resin portions is not exposed on the outer surface and the inner surface of the flexible tube, the optically transparent hollow glass beads are dispersed in the synthetic resin, and the microparticle-containing synthetic resin portions including boundary surfaces that are formed between the synthetic resin and the optically transparent hollow glass beads, the optically transparent hollow glass beads having an average particle size of 10 to 80 μm, an effective hydrostatic pressure (90% yield pressure resistance) under which 10 volume % of the glass beads collapse is at least 3 megapascals (MPa); and a ratio of the volume of the optically transparent hollow glass beads in the microparticle-containing portions is 5 % to 20%. However, Field discloses an “embryo replacement catheter has a flexible extruded shaft of a transparent polyurethane with a bore extending along its length” and teaches the microparticle-containing synthetic resin portions (Figure 2) are positioned within an inner wall ([0018], Figure 2) of the flexible tube (“the outer surface of the device may be smooth and uninterrupted by gas bubbles, and the device may have an inner surface that is smooth and uninterrupted by gas bubbles”, [0007]; Figure 2), having an outer periphery that faces towards and is spaced from the inner surface and the outer surface of the flexible tube so that the outer periphery of the microparticle-containing synthetic resin portions (Figure 2) is not exposed on the outer surface and the inner surface of the flexible tube ([0007]; Figure 2) (“the outer surface of the device may be smooth and uninterrupted by gas bubbles, and the device may have an inner surface that is smooth and uninterrupted by gas bubbles”, [0007]; Figure 2), the optically transparent hollow glass beads (“The bubbles could be formed by the incorporation of hollow microspheres of resin or glass.”, [0023]) are dispersed in the synthetic resin ([0023]), and the microparticle-containing synthetic resin portions (Figure 2) including boundary surfaces that are formed between the synthetic resin (“Polyurethane material 21”, [0020]) and the optically transparent hollow glass beads ([0023]), and the optically transparent hollow glass beads ([0023]) having an average particle size of 1 to 50 μm ([0023]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the embryo transfer tool of Futoshi such that teaches the microparticle-containing synthetic resin portions are positioned within an inner wall of the flexible tube, having an outer periphery that faces towards and is spaced from the inner surface and the outer surface of the flexible tube so that the outer periphery of the microparticle-containing synthetic resin portions is not exposed on the outer surface and the inner surface of the flexible tube, the optically transparent hollow glass beads, and the microparticle-containing synthetic resin portions including boundary surfaces that are formed between the synthetic resin and the optically transparent hollow glass beads, and the optically transparent hollow glass beads having an average particle size of 1 to 50 μm, as taught by Field, for the benefit of “increase[ing] the visibility of the device under ultrasound imaging” (Field: [0006]). Additionally, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the optically transparent hollow glass bead’s diameter of the embryo transfer tool of Futoshi such as a range of 1 to 50 μm, as taught by Field, for the benefit of increase the visibility of the device under ultrasound observation (Field: [0009]). Furthermore, it has been held that “[i]n the case where the claimed ranges ‘overlap or lie inside ranges disclosed by the prior art’ a prima facie case of obviousness exists. In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990).” See MPEP 2144.05(I). Applicant appears to have placed no criticality on the claimed range. The modified invention of Futoshi and Field does not teach the optically transparent hollow microspheres having an effective hydrostatic pressure according to 90% yield pressure resistance under which 10 volume % of the glass beads collapse is at least 3 megapascals (MPa); and the ratio of the volume of the optically transparent glass beads in the microparticle-containing portions is 5 % to 20%. However, Matsubara discloses “a hollow aluminosilicate glass microsphere comprising a glass composition containing no or substantially no alkali metal and having substantially no eluted amount of boron, and a method for producing the same” ([0001]) and an effective hydrostatic pressure according to 90% yield pressure resistance under which 10 volume % of the glass beads collapse being at least 3 megapascals (MPa) (“a fracture strength of at least 50 MPa at the time when 10% volume is reduced based on volume under hydrostatic pressure”, [0020], [0065]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the optically transparent hollow glass microspheres of Futoshi and Field to incorporate an effective hydrostatic pressure according to 90% yield pressure resistance under which 10 volume % of the glass beads collapse being at least 3 megapascals (MPa), as taught by Matsubara, for the benefit of preventing the “fractur[ing] at the time of preparing a compound or during” use (Matsubara: [0020]). The modified invention of Futoshi, Field and Matsubara does not teach a ratio of the volume of the optically transparent hollow glass beads in the microparticle-containing portions is 5 % to 20%. However, Qiao discloses “density, thermal conductivity, and compressive properties of hollow glass microsphere (HGM)-filled epoxy composites were investigated” and teaches a ratio of the volume of the optically transparent hollow glass beads in the microparticle-containing portions is 5 % to 20% (Figure 2b depicts 10 volume % hollow glass microsphere (HGM) to epoxy and Figure 2c depicts 20 volume % HGM to epoxy). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the embryo transfer tool of Futoshi, Field and Matsubara such that a ratio of the volume of the optically transparent glass beads in the microparticle-containing portions being 5 % to 20%, as taught by Qiao, for the benefit of adjusting the composition to the desired compressive modulus and strength needed for the user (page 1416, column 1, paragraph 4). Regarding claim 13, Futoshi, Field, Matsubara and Qiao teach all limitations of claim 11. Futoshi teaches the synthetic resin forming the first and second microparticle-containing synthetic resin portions (“a first bubble-containing surface layer” 13a, page 3, paragraph 2; Figure 1; “second bubble-containing surface layer” 13b, page 3, paragraph 2) is the same as the colorless and transparent synthetic resin (“polyolefin (polyethylene, polypropylene)”, page 3, paragraph 6 for “soft tube 11”; “polyolefin (for example, polyethylene, polypropylene”, page 6, paragraph 2 for “flexible tube 21”) forming the flexible tube (“flexible tube 21”, page 6, paragraph 2). Examiner interprets the soft tube contains the first and second microparticle-containing synthetic resin portions and both flexible tube and soft tube from Futoshi can be from the same material and reads on the limitation “is same the colorless and transparent synthetic resin”. Regarding claim 14, Futoshi, Field, Matsubara and Qiao teach all limitations of claim 11. Futoshi teaches the synthetic resin forming the first and second microparticle-containing synthetic resin portions has higher flexibility than the
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Prosecution Timeline

May 27, 2021
Application Filed
Jul 10, 2024
Non-Final Rejection — §103, §112
Oct 17, 2024
Response Filed
Feb 03, 2025
Final Rejection — §103, §112
Apr 18, 2025
Response after Non-Final Action
May 07, 2025
Request for Continued Examination
May 08, 2025
Response after Non-Final Action
May 25, 2025
Non-Final Rejection — §103, §112
Aug 27, 2025
Response Filed
Dec 19, 2025
Final Rejection — §103, §112 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
19%
Grant Probability
90%
With Interview (+70.3%)
4y 2m
Median Time to Grant
High
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