Prosecution Insights
Last updated: September 17, 2026
Application No. 17/764,055

ARTIFICIAL ESOPHAGEAL STRUCTURE HAVING MULTI-LAYER STRUCTURE USING THREE-DIMENSIONAL BIO-PRINTING, AND MANUFACTURING DEVICE AND MANUFACTURING METHOD THEREFOR

Final Rejection §103
Filed
Mar 25, 2022
Priority
Sep 26, 2019 — RE 10-2019-0118951 +1 more
Examiner
SPENCER, MAXIMILIAN TOBIAS
Art Unit
3774
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
The Catholic University Of Korea Industry- Academi Cooperation Foundation
OA Round
4 (Final)
33%
Grant Probability
At Risk
5-6
OA Rounds
0m
Est. Remaining
64%
With Interview

Examiner Intelligence

Grants only 33% of cases
33%
Career Allowance Rate
22 granted / 67 resolved
-37.2% vs TC avg
Strong +32% interview lift
Without
With
+31.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
28 currently pending
Career history
115
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
62.9%
+22.9% vs TC avg
§102
17.3%
-22.7% vs TC avg
§112
17.5%
-22.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 67 resolved cases

Office Action

§103
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 . Status of Claims Claims 1-6 and 8-13 are pending and examined below. Response to Arguments The remarks of 11/04/2025 have been considered but are not persuasive Applicant argues that the prior art doesn't explicitly teach or disclose all of the elements of amended claims 1 and 9. In particular applicant argues the following claim language of claim 1 and claim 9 respectively: “wherein both ends in the lengthwise direction of the artificial esophageal scaffold are manufactured in a structure without the pores by a plotting technique” Wherein when the strand is manufactured, a fan of the apparatus of manufacturing the artificial esophageal scaffold is operated to control a degree of stretch of the strand by discharging through the injection nozzle in a state in which forced convection is generated such that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection Regarding the first bullet point – The claimed phrase “wherein both ends in the lengthwise direction of the artificial esophageal scaffold are manufactured in a structure without the pores by a plotting technique” is being treated as a product by process limitation; that is, that the product (both ends in a lengthwise direction of the artificial esophageal scaffold) is made by process (manufactured in a structure without the pores by a plotting technique). As set forth in MPEP 2113, product-by-process claims are NOT limited to the manipulations of the recited steps, only to the structure implied by the steps. Once a product appearing to be substantially the same or similar is found, a 35 U.S.C. 103 rejection may be made and the burden is shifted to applicant to show an unobvious difference. See MPEP 2113. It appears that the artificial esophageal scaffold Jae in view of Liu in view of Cassivi of would be the same or similar as that claimed; especially since Jae discloses a plotting technique as described while Liu discloses end portions without pores that can also be additively manufactured (¶0072) Regarding the second bullet point – This argument is moot in light of the new 103 rejection below. Claim Rejections - 35 USC § 103 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. Claim(s) 1, 6, and 8 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi) Regarding claim 1, Jae discloses an artificial esophageal scaffold of a multi-layered construct (Fig. 6), comprising: a first layer (see annotated Fig. 6 below) in a hollow columnar shape with a circular cross section (see Fig. 6, wherein annotated first layer is a hollow columnar shape with circular cross section); a second layer (see annotated Fig. 6 below) being disposed inside the first layer (see annotated Fig. 6, wherein second layer is inside the first layer) and in a columnar construct (Fig. 5, wherein second layer is formed of columns) mimicking a mucosa of an esophagus (Fig. 5, wherein the second layer is in a columnar construct is therefore configured for the claimed intended use); and and an interlayer support (see annotated Fig. 6 below) being disposed between the first layer and the second layer (see annotated Fig. 6 below) and configured for maintaining the interlayer spacing (see annotated Fig. 6, wherein annotated interlayer support is configured for this intended use), wherein each of the first layer and the second layer comprises a plurality of columns disposed at regular intervals (Fig. 5, wherein first and second layer are formed of a plurality of columns, see also Lines 235-236 of translation, wherein the cell support is formed by repeating the dragging technique), and a plurality of strands (Fig. 3, strands 60) formed by a dragging technique between the plurality of columns (see Fig. 3, wherein this dragging technique between two columns is shown) wherein a pore size of the pores varies according to a distance between the columns (See lines 185-187 of translation, wherein micropore size is based on distance d between pillars) PNG media_image1.png 705 912 media_image1.png Greyscale Jae doesn't explicitly teach or disclose that both ends in a lengthwise direction of the artificial esophageal scaffold have no pores. Lui discloses an artificial esophageal scaffold (Fig. 1, 1, see also ¶0051, wherein 1 can be inserted into an esophagus) of multi-layer construction (¶0072, wherein “three-dimensional additive means” corresponds to multi-layer constriction) wherein both ends in a lengthwise direction of the artificial esophageal scaffold have no pores (see annotated Fig. 1 below) PNG media_image2.png 1229 999 media_image2.png Greyscale It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the ends of the artificial esophageal scaffold of Jae to have no pores, as taught by Lui, in order to create a more robust scaffold with more desirable mechanical properties. Jae doesn't explicitly teach or disclose that both ends in a lengthwise direction are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Liu discloses two lengthwise ends that have no pores (see annotated Fig. 1 above) but doesn't explicitly teach or disclose that they are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Cassivi discloses an artificial esophageal scaffold wherein both ends in a lengthwise direction (¶0007, wherein the “distal end portion” and “proximal end portion” correspond to both ends in a lengthwise direction) are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold (¶0007, wherein the “distal end portion” and “proximal end portion” are configured to be attached the “lower stump end” and the “upper stump end” of the esophagus respectively). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to configure the ends of the artificial scaffold of Jae in view of Lui to be directly connected to portions of an esophagus during transplantation, as taught by Cassivi, in order to avoid leakage, stricture, failure of tissue regrowth, obstruction, migration and/or displacement (¶0022). Regarding claim 6, Jae doesn't explicitly teach or disclose that both ends in a lengthwise direction of the artificial esophageal scaffold have no pores. Lui discloses an artificial esophageal scaffold (Fig. 1, 1, see also ¶0051, wherein 1 can be inserted into an esophagus) wherein both ends in a lengthwise direction of the artificial esophageal scaffold have no pores (see annotated Fig. 1 below) PNG media_image3.png 1266 1029 media_image3.png Greyscale The claimed phrase “manufactured…by a plotting technique” is being treated as a product by process limitation; that is, that the ends in a lengthwise direction of the artificial esophageal scaffold are formed by a plotting technique. As set forth in MPEP 2113, product-by-process claims are NOT limited to the manipulations of the recited steps, only to the structure implied by the steps. Once a product appearing to be substantially the same or similar is found, a 35 U.S.C. 103 rejection may be made and the burden is shifted to applicant to show an unobvious difference. See MPEP 2113. Regarding claim 8, Jae discloses columns (Fig. 3, 51a and 51b) which are related to the flexibility of the construct (see lines 200-201 where the pillars 51a and 51b are related to the flexibility of the construct because the main frame is made of pillars 51a and 51b). The claimed phrase “formed by a four-point injection plotting technique” is being treated as a product by process limitation; that is, that the columns are formed by a four-point injection plotting technique. As set forth in MPEP 2113, product-by-process claims are NOT limited to the manipulations of the recited steps, only to the structure implied by the steps. Once a product appearing to be substantially the same or similar is found, a 35 U.S.C. 103 rejection may be made and the burden is shifted to applicant to show an unobvious difference. See MPEP 2113. Claim(s) 2 and 3 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi), as applied to claims above, and further in view of US 2016/0287419 (Nguyen) Regarding claim 2, Jae discloses a columnar construct and a second layer (See rejection of claim 1) but doesn’t explicitly teach or disclose a star-shaped cross section with ridges and valleys. Liu doesn't explicitly teach or disclose a star-shaped cross section with ridges and valleys. Cassivi doesn't explicitly teach or disclose a star-shaped cross section with ridges and valleys Nguyen discloses a columnar construct (Fig. 1, 12) comprising a star shaped cross section (Fig. 4, wherein 12 has a star shaped cross section) with a ridge (Fig. 4, 24, ¶0100) and a valley (Fig. 4, 26, ¶0100). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the columns of the second layer of Jae in view of Liu in view of Cassivi, to be formed at the ridges and valleys of the star-shaped cross section, as taught by Nguyen, in order to maintain luminal patency (Nguyen, ¶0098). Regarding claim 3, Jae discloses an auxiliary column (Fig. 5, 210) but doesn't explicitly teach or disclose a star-shaped cross section a ridge and a valley. Liu doesn't explicitly teach or disclose a star-shaped cross section a ridge and a valley. Cassivi doesn't explicitly teach or disclose a star-shaped cross section a ridge and a valley. Nguyen discloses a columnar construct (Fig. 1, 12) comprising a star shaped cross section (Fig. 4, wherein 12 has a star shaped cross section) with a ridge (Fig. 4, 24, ¶0100) and a valley (Fig. 4, 26, ¶0100). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to configure the auxiliary column Jae in view of Liu in view of Cassivi to be formed between the ridges and valleys of the star-shaped cross section, as taught by Nguyen, in order to maintain luminal patency (Nguyen, ¶0098). Claim(s) 4 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi), as applied to claims above, and further in view of US 2020/0163747 (Park) Regarding claim 4, Jae discloses a first layer (see rejection of claim 1) but doesn’t explicitly teach or disclose an outer wrinkled construct. Liu doesn’t explicitly teach or disclose an outer wrinkled construct. Cassivi doesn’t explicitly teach or disclose an outer wrinkled construct. Park discloses a columnar construct (Fig. 2) comprising an outer wrinkled construct (Fig. 2, see also ¶0020, wherein a surface concave-convex structure corresponds to an outer wrinkled construct). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to configure the first layer of Jae in view of Liu in view of Cassivi, as an outer wrinkled construct, as taught by Park, in order to provide both flexibility and patency (Park, ¶0020). The claimed phrase “by repeating an increase and a decrease of a diameter according to a height of a sliced horizontal layer” is being treated as a product by process limitation; that is, that the outer wrinkled construct is formed by repeating an increase and a decrease of a diameter according to a height of a sliced horizontal layer. As set forth in MPEP 2113, product-by-process claims are NOT limited to the manipulations of the recited steps, only to the structure implied by the steps. Once a product appearing to be substantially the same or similar is found, a 35 U.S.C. 103 rejection may be made and the burden is shifted to applicant to show an unobvious difference. See MPEP 2113. Claim(s) 5 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi), as applied to claims above, and further in view of CN 107164318 (Ye) Regarding claim 5, Jae discloses a first and second layer (see rejection of claim 1) but doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Liu doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Cassivi doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Ye discloses wherein a bioink (Fig. 2, biological ink 4) is printed in a space between the first layer and the second layer (see Fig. 2, wherein 4 is printed between the first and second layer of the biological framework) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the space in between the first layer and second layer of Jae in view of Liu in view of Cassivi with bioink, as taught by Ye, in order to form a functional vascular network within the scaffold. Claim(s) 9 and 10 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of KR 101849948 (Cho) in view of US 2020/0086552 (Yarka) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi) in view of US 2012/0080814 (Sun) Regarding claim 9, Jae discloses a method of manufacturing an artificial esophageal scaffold of the multi-layered construct (Figs. 3-6) comprising: having a first layer in a columnar shape with a circular cross section (see annotated Fig. 6 below) and a second layer being disposed inside the first layer (see annotated Fig. 6 below) and in a columnar construct mimicking a mucosa of an esophagus (see Fig. 6, wherein the second layer is configured for this intended use based on its arrangement within the first layer) and a dragging technique (Fig. 3, see also lines 157-161 of translation), wherein, when each layer (lines 169-170, wherein strands 60 correspond to each layer) of the artificial esophageal scaffold is manufactured into the plurality of columns (see Lines 169-170 of translation, wherein strands 60 are formed between the columns), a resultant multi-layered construct has a porous construct having pores between strands (See Fig. 6, wherein micropores 330 correspond to pores between strands) wherein a pore size of the pores varies according a distance between the columns (See lines 185-187 of translation, wherein micropore size is based on distance d between pillars) PNG media_image1.png 705 912 media_image1.png Greyscale Jae doesn’t explicitly teach or disclose the steps of separately designing, generating G-code, manufacturing according to the G-code. Cho discloses generating G-code (Fig. 2, S30) and manufacturing the columns and the strand according to the G-code (Fig. 2, S50), It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify with the process of Jae with steps to design, generate G code, and manufacture, as taught by Cho, in order to control the pore size to promote cell growth, cell attachment, and structural strength. Jae doesn’t explicitly teach or disclose a fan to control a degree of stretch of the strand by discharging through the injection nozzle in a state in which forced convection is generated. Cho doesn't explicitly teach or disclose a fan to control a degree of stretch of the strand by discharging through the injection nozzle in a state in which forced convection is generated. Yarka discloses a fan (Fig. 2, 244, see also ¶0056 wherein 244 may include a variable speed fan) of the apparatus of manufacturing (Fig. 3, 100) which is operated to control a degree of stretch of the strand (¶0034, wherein printer 100 is configured for this intended use because it controls the temperature of the build material) by discharging through the injection nozzle in a state in which forced convection is generated (¶0045, wherein “actively cooling an outlet portion of the extruder” corresponds to discharging through the injection nozzle in a state in which force convection is generated”) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the process of Jae in view of Cho to include a step to control the degree of stretch via a fan, as taught by Yarka, in order to avoid issue related to undesirably heating of the extruder such as damage to the apparatus of manufacturing (¶Yarka, ¶0003) or fluctuations in the dimensions of the printed product. Jae doesn't explicitly teach or disclose that both ends in a lengthwise direction of the artificial esophageal scaffold have no pores. Cho doesn't explicitly teach or disclose that both ends in a lengthwise direction of the artificial esophageal scaffold have no pores. Yarka doesn't explicitly teach or disclose that both ends in a lengthwise direction of the artificial esophageal scaffold have no pores Lui discloses an artificial esophageal scaffold (Fig. 1, 1, see also ¶0051, wherein 1 can be inserted into an esophagus) of multi-layer construction (¶0072, wherein “three-dimensional additive means” corresponds to multi-layer constriction) wherein both ends in a lengthwise direction of the artificial esophageal scaffold have no pores (see annotated Fig. 1 below) PNG media_image4.png 1069 869 media_image4.png Greyscale It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the ends of the artificial esophageal scaffold of Jae in view of Cho in view of Yarka to have no pores, as taught by Lui, in order to create a more structurally sound and robust frame for the scaffold. Jae doesn't explicitly teach or disclose that both ends in a lengthwise direction are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Cho doesn't explicitly teach or disclose that both ends in a lengthwise direction are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Yarka doesn't explicitly teach or disclose doesn't explicitly teach or disclose that both ends in a lengthwise direction are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Liu discloses two lengthwise ends that have no pores (see annotated Fig. 1 above) but doesn't explicitly teach or disclose that they are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold. Cassivi discloses an artificial esophageal scaffold wherein both ends in a lengthwise direction (¶0007, wherein the “distal end portion” and “proximal end portion” correspond to both ends in a lengthwise direction) are configured to be directly connected to portions of an esophagus during transplantation of the artificial esophageal scaffold (¶0007, wherein the “distal end portion” and “proximal end portion” are configured to be attached the “lower stump end” and the “upper stump end” of the esophagus respectively). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to configure the ends of the artificial scaffold of Jae in view of Cho in view of Yarka in view of Lui to be directly connected to portions of an esophagus during transplantation, as taught by Cassivi, in order to avoid leakage, stricture, failure of tissue regrowth, obstruction, migration and/or displacement (¶0022). Jae doesn't explicitly teach or disclose that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection. Cho doesn't explicitly teach or disclose that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection. Yarka doesn't explicitly teach or disclose that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection. Liu doesn't explicitly teach or disclose that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection. Cassivi doesn't explicitly teach or disclose that a change in a diameter of the strand is induced according to a degree of cooling of extruded material of the strand by the force convection. Sun discloses an integrated assisting cooling device (Figs. 4 and 5) wherein a change in a diameter of the strand is induced (¶0004, wherein “higher printing resolution, precision, and controllability” corresponds to a change in diameter) according to a degree of cooling of extruded material of the strand by the force convection (¶0029, wherein “the AC device cools the filament as it is extruding from the nozzle” corresponds to force convection) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the method of Jae in view of Cho in view of Yarka in view of Liu in view of Cassivi to induce a change in diameter with force convection, as taught by Sun, in order to allow for closer mimicry of tissues and organs (¶0004) Regarding claim 10, Jae discloses adjusting a distance between the columns by setting column arrangement at each layer (See line 174-176 of translation, wherein distance d between columns can be set). Jae doesn’t explicitly teach or disclose a design step or setting pore size of each layer. Cho discloses wherein in the separately designing (Fig. 2, S10), a pore size is adjusted by setting pore sizes of each layer (Lines 199, “selecting one or more cell properties such as pore size”) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the method of Jae with a step to adjust the pore size of each layer, as taught by Cho, in order to design for cell growth, cell attachment, and structural strength (Cho, lines 13-14) Claim(s) 11 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of KR 1849948 (Cho) in view of US 2020/0086552 (Yarka) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi) in view of US 2012/0080814 (Sun), as applied to claims above, and further in view of US 2016/0287419 (Nguyen) Regarding claim 11, Jae discloses a columnar construct with columns (see rejection of claim 9) but doesn’t explicitly teach or disclose a design step. Cho discloses a separate design step (Fig. 2, S10) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the process of Jae with a step to separately design the structure, as taught by Cho, in order to in order to design for cell growth, cell attachment, and structural strength (Cho, lines 13-14) Jae doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Cho doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Yarka doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Liu doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Cassivi doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Sun doesn't explicitly teach or disclose a star-shaped cross section comprising a ridge and a valley. Nguyen discloses a columnar construct (Fig. 1, 12) comprising a star shaped cross section (Fig. 4, wherein 12 has a star shaped cross section) with a ridge (Fig. 4, 24, ¶0100) and a valley (Fig. 4, 26, ¶0100). It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to dispose the columns of Jae in view of Cho in view of Yarka in view of Lui in view of Cassivi in view of Sun at a ridge and of the star-shaped cross section, as taught by Nguyen, in order to maintain luminal patency (Nguyen, ¶0098). Claim(s) 12 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of KR 1849948 (Cho) in view of US 2020/0086552 (Yarka) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi) in view of US 2012/0080814 (Sun), as applied to claims above, and further in view of US 2020/0163747 (Park) Regarding claim 12, Jae discloses a first layer (see rejection of claim 1) but doesn't explicitly teach or disclose forming an outer wrinkled construct. Cho doesn’t explicitly teach or disclose forming an outer wrinkled construct. Yarka doesn’t explicitly teach or disclose forming an outer wrinkled construct. Liu doesn’t explicitly teach or disclose forming an outer wrinkled construct. Cassivi doesn’t explicitly teach or disclose forming an outer wrinkled construct. Sun doesn’t explicitly teach or disclose forming an outer wrinkled construct. Park discloses forming an outer wrinkled construct (Fig. 2, see also ¶0020, wherein a surface concave-convex structure corresponds to an outer wrinkled construct) by repeating an increase and a decrease of a diameter according to a height of a sliced horizontal layer (see Fig. 16, wherein the diameter is increased and decreased according to height, ¶0036, wherein the numbers of materials used corresponds to an increase and decrease in diameter) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the design process of Jae in view of Cho in view of Yarka in view of Lui in view of Cassivi in view of Sun with an outer wrinkled construct, as taught by Park, in order to provide both flexibility and patency to the scaffold (Park, ¶0020) Claim(s) 13 is/are rejected under 35 U.S.C. 103 as being unpatentable over KR 2019/0032710A (Jae) in view of KR 1849948 (Cho) in view of US 2020/0086552 (Yarka) in view of US 2019/0350731 (Liu) in view of US 2013/0131827 (Cassivi) in view of US 2012/0080814 (Sun), as applied to claims above and further in view of CN 107164318 (Ye) Regarding claim 13, Jae discloses a first and second layer (see rejection of claim 1) but doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Cho doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Yarka doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Lui doesn’t explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Cassivi doesn’t explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Sun doesn't explicitly teach or disclose wherein a bioink is printed in a space between the first layer and the second layer. Ye discloses wherein a bioink (Fig. 2, biological ink 4) is printed in a space between the first layer and the second layer (see Fig. 2, wherein 4 is printed between the first and second layer of the biological framework) It would have been obvious to a person of ordinary skill in the art, before the effective filing date of the claimed invention to modify the space in between the first layer and second layer of Jae in view of Cho in view of Yarka in view of Lui in view of Cassivi in view of Sun with bioink, as taught by Ye, in order to form a functional vascular network within the scaffold. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any extension fee pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MAXIMILIAN TOBIAS SPENCER whose telephone number is (571)272-8382. The examiner can normally be reached M-F 8am-5pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Jerrah Edwards can be reached on 408.918.7557. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /MAXIMILIAN TOBIAS SPENCER/Examiner, Art Unit 3774 /JERRAH EDWARDS/Supervisory Patent Examiner, Art Unit 3774
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Prosecution Timeline

Show 2 earlier events
Jun 26, 2025
Response Filed
Aug 04, 2025
Final Rejection mailed — §103
Nov 04, 2025
Response after Non-Final Action
Dec 04, 2025
Request for Continued Examination
Dec 20, 2025
Response after Non-Final Action
Jan 16, 2026
Non-Final Rejection mailed — §103
Apr 15, 2026
Response Filed
Jul 21, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

5-6
Expected OA Rounds
33%
Grant Probability
64%
With Interview (+31.6%)
3y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 67 resolved cases by this examiner. Grant probability derived from career allowance rate.

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