Prosecution Insights
Last updated: April 19, 2026
Application No. 18/648,963

DEVICES FOR TREATMENT OF VASCULAR DEFECTS

Final Rejection §102§103
Filed
Apr 29, 2024
Examiner
KHANDKER, RAIHAN R
Art Unit
3771
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Microvention Inc.
OA Round
2 (Final)
64%
Grant Probability
Moderate
3-4
OA Rounds
2y 11m
To Grant
99%
With Interview

Examiner Intelligence

Grants 64% of resolved cases
64%
Career Allow Rate
100 granted / 157 resolved
-6.3% vs TC avg
Strong +60% interview lift
Without
With
+60.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
61 currently pending
Career history
218
Total Applications
across all art units

Statute-Specific Performance

§101
1.4%
-38.6% vs TC avg
§103
48.6%
+8.6% vs TC avg
§102
21.4%
-18.6% vs TC avg
§112
23.3%
-16.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 157 resolved cases

Office Action

§102 §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 . Response to Amendment This office action is responsive to the amendment filed on 02/05/2026. As directed by the amendment: claim 13 has been amended, claims 22-63 have been cancelled and claim 64 has been added. Thus, claims 1-21 and 64 are presently pending in this application. Response to Arguments Applicant's arguments, see pages 5-7, filed 02/05/2026, with respect to the rejection of claim 1 under 35 U.S.C. 102(a)(1) as being anticipated by Sepetka et al (US 20080281350 A1), herein referenced to as “Sepetka” have been fully considered but they are not persuasive. The applicant argues that Sepetka does not disclose the limitations of claim 1, specifically “wherein the first end of the plurality of elongate filaments are gathered in a hub” and “wherein the hub is located in the inner cavity in the first unrestrained preset configuration”. The applicant argues that “some” of the filaments of the reticulated matrix 45 of Sepetka terminate or dead-end at some point other than a hub, and thus each of the filaments are not gathered in a hub as recited in claim 1. The claim limitation however is “wherein the first end of the plurality of elongate filaments are gathered in a hub”, hence only a first end of the filaments need be gathered in a hub, and as explained previously, 45 is gathered around 30, as seen in Figs. 1A, C, and 1D, hence gathered in the hub, furthermore, the arms 40 are connected to 45, see [0127], and the arms are coupled to the hub, see [0089], hence at least a first end of each of the plurality of elongate filaments are gathered in a hub. The definition of “in” according to the Merriam-Webster Online dictionary being “used as a function word to indicate inclusion, location, or position within limits” (highlighted for emphasis), and in this case, all first ends of the elongate filaments are included with the frame 40 which is connected to the hub, otherwise the matrix would not be connected to the rest of the device. The definition of “in” is not restricted to “inside” as the applicant argues. As such the rejection of claim 1 will be maintained. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-11 and 15-19 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Sepetka et al (US 20080281350 A1), herein referenced to as “Sepetka”. Claim 1 Sepetka discloses: A device implantable device (see Figs. 1A-1D, [0168]-[0169]) for treatment of a patient's cerebral aneurysm (see Figs. 1A-1D, [0168], seal the neck of an aneurysm), comprising: a permeable shell 45 (see Figs. 1A-1D, [0047], permeable to blood, and [0169]) made from a plurality of elongate filaments filaments (see [0144], braided with the matrix, hence the matrix is made of filaments that can be braided with radiopaque filaments), wherein each of the plurality of filaments filaments has a first end and a second end filaments have a first end and a second end, wherein the first end of each of the plurality of elongate filaments are gathered in a hub 30 (see Figs. 1A-1D, [0169], 45 is gathered around 30, as seen in Figs. 1A, C, and 1D, hence gathered in the hub, furthermore, the arms 40 are connected to 45, see [0127], and the arms are coupled to the hub, see [0089], hence at least a first end of each of the plurality of elongate filaments are gathered in a hub), wherein the permeable shell 45 has a first unrestrained preset configuration (see Fig. 1C, [0168] and [0172]) comprising a dome portion (see annotated Fig. 1C below) and a brim portion (see annotated Fig. 1C below), wherein the dome portion (see annotated Fig. 1C below) comprises an outer surface (see annotated Fig. 1C below), an inner surface (see annotated Fig. 1C below), and an inner cavity (see annotated Fig. 1C below) defined by the inner surface (see annotated Fig. 1C below), and wherein the hub 30 is located in the inner cavity (see annotated Fig. 1C below) in the first unrestrained preset configuration (Fig. 1C), and wherein the permeable shell 45 is configured to assume a second restrained configuration (see Fig. 1D, [0168]) when deployed in the patient's cerebral aneurysm aneurysm (see Fig. 1D), wherein the second restrained configuration (Fig. 1D) comprises an open distal end open distal end of 45 (see Fig. 1D). PNG media_image1.png 538 577 media_image1.png Greyscale Claim 2 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the first unrestrained preset configuration (see Fig. 1C) has a hat shape (see Fig. 1C, 45 takes on a hat like shape). Claim 3 Sepetka discloses: The device of claim 2, see 102 rejection above. Sepetka further discloses: wherein the hat shape (see Fig. 1C) further comprises a lip portion (see annotated Fig. 1C below). PNG media_image2.png 538 723 media_image2.png Greyscale Claim 4 Sepetka discloses: The device of claim 3, see 102 rejection above. Sepetka further discloses: wherein the lip portion (see annotated Fig. 1C below claim 3) extends at an acute angle (see annotated Fig. 1C below claim 3) from the brim portion (see annotated Fig. 1C below claim 3). Claim 5 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the first unrestrained preset configuration (see Fig. 1C) has an umbrella shape (see Fig. 1C, 45 takes on an umbrella shape). Claim 6 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the hub 30 is located at a distal end distal end of the implant (see Fig. 1C, in this configuration the hub is at the distal end of the device) of the first unrestrained preset configuration (see Fig. 1C). Claim 7 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the second restrained configuration (see Fig. 1D) has a bowl shape (see Fig. 1D, the implant/45 has a bowl shape in this configuration). Claim 8 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the second restrained configuration (see Fig. 1D) further comprises a substantially flat portion (see annotated Fig. 1D below) at a proximal end the proximal end of the implant (see Fig. 1D). PNG media_image3.png 608 538 media_image3.png Greyscale Claim 9 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the second restrained configuration (see Fig. 1D) has a tulip shape (see Fig. 1D, the implant/45 has a tulip shape in this configuration due to the “petals” at 41). Claim 10 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the second restrained configuration (see Fig. 1D) has a cup shape (see Fig. 1D, the implant/45 has a cup shape in this configuration). Claim 11 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the hub 30 is located at a proximal end the proximal end of the implant (see Fig. 1D, the hub 30 is at the proximal end of the device) of the second restrained configuration (see Fig. 1D). Claim 15 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein a distal end the distal end of 45 (see Fig. 1C) of the permeable shell 45 in the first unrestrained preset configuration (see Fig. 1C) is inverted the distal end of 45 is inverted as it is facing proximally rather than distally (see Fig. 1C). Claim 16 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein a distal end the distal end of 45 (see Fig. 1C) of the permeable shell 45 in the first unrestrained preset configuration (see Fig. 1C) has an outer convex surface (see [0018], Fig. 1C, which is the first orientation, is described as a convex orientation, hence has an outer convex surface). Claim 17 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein a distal the distal end of 45 (see Fig. 1C) of the permeable shell 45 in the second restrained configuration (see Fig. 1D) has an inner concave surface the inner concave surface of 45 facing distally (see Fig. 1D). Claim 18 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka further discloses: wherein the plurality of elongate filaments filaments are arranged in a braided mesh (see [0144], braided with the matrix, hence the matrix is made of filaments that can be braided with radiopaque filaments, hence a braided mesh). Claim 19 Sepetka discloses: The device of claim 18, see 102 rejection above. Sepetka further discloses: wherein the permeable shell 45 comprises a single layer of the braided mesh (see Figs. 1A-1D, [0144], there is a single layer of braided mesh). 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 12-14 and 20-21 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sepetka in view of Pereira et al (US 20200367894 A1), herein referenced to as “Pereira”. Claim 12 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka does not explicitly disclose: wherein the first end and the second end of each of the plurality of elongate filaments are gathered in the hub. However, Pereira in a similar field of invention teaches a device for treatment of a patient’s cerebral aneurysm 420 (see Fig. 1) with a hub 448 (see Fig. 1), and a plurality of elongate filaments 424 (see Fig. 1) with a first end 426 (see Fig. 1) and a second end 428 (see Fig. 1). Pereira further teaches: wherein the first end 426 and the second end 428 of each of the plurality of elongate filaments 424 are gathered in the hub 448 (see Fig. 1, [0029], the ends of the filaments that make up 424, have their ends gathered in the hub 448). It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Pereira and teach a device for treatment of a patient’s cerebral aneurysm with the first end and the second end of each of the plurality of elongate filaments are gathered in a hub. Motivation for such can be found in Pereira as this allows access to the volume of the aneurysm to place additionally embolic devices (see [0027]), furthermore this creates a device without exposed edges that can potentially damage the aneurysm wall. Claim 13 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka does not explicitly disclose: wherein each of the plurality of elongate filaments comprises a middle portion, and wherein the middle portion forms a loop at a distal end of the second restrained configuration. However, Pereira in a similar field of invention teaches a device for treatment of a patient’s cerebral aneurysm 420 (see Fig. 1) in a second restrained configuration (see Fig. 1) with a hub 448 (see Fig. 1), and a plurality of elongate filaments 424 (see Fig. 1) with a first end 426 (see Fig. 1) and a second end 428 (see Fig. 1). Pereira further teaches: wherein each of the plurality of elongate filaments 424 comprises a middle portion 442 (see Fig. 1, [0029]), and wherein the middle portion 442 forms a loop 442 (see Fig. 1, [0029], forms an inversion fold/loop) at a distal end distal end of 420 (see Fig. 1) of the second restrained configuration (see Fig. 1). It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Pereira and teach a device for treatment of a patient’s cerebral aneurysm with each of the plurality of elongate filaments comprises a middle portion, and wherein the middle portion forms a loop at a distal end of the second restrained configuration. Motivation for such can be found in Pereira as this allows access to the volume of the aneurysm to place additionally embolic devices (see [0027]), furthermore this creates a device without exposed edges that can potentially damage the aneurysm wall. Claim 14 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka does not explicitly disclose: wherein each of the plurality of elongate filaments comprises a middle portion, and wherein the middle portion forms a loop at a proximal end of the first unrestrained preset configuration. However, Pereira in a similar field of invention teaches a device for treatment of a patient’s cerebral aneurysm 420 (see Fig. 1) in a second restrained configuration (see Fig. 1) with a hub 448 (see Fig. 1), and a plurality of elongate filaments 424 (see Fig. 1) with a first end 426 (see Fig. 1) and a second end 428 (see Fig. 1). Pereira further teaches: wherein each of the plurality of elongate filaments 424 comprises a middle portion 442 (see Fig. 1, [0029]), and wherein the middle portion 442 forms a loop 442 (see Fig. 1, [0029], forms an inversion fold/loop). It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Pereira and teach a device for treatment of a patient’s cerebral aneurysm with each of the plurality of elongate filaments comprises a middle portion, and wherein the middle portion forms a loop. Motivation for such can be found in Pereira as this allows access to the volume of the aneurysm to place additionally embolic devices (see [0027]), furthermore this creates a device without exposed edges that can potentially damage the aneurysm wall. The combination of Sepetka and Pereira further teaches: the loop at a proximal end of the first unrestrained preset configuration (Sepetka is modified to have a loop of the filaments opposite from the ends where they are bundled in the hub, hence in the unrestrained present configuration (Fig. 1C), the loop would be at the proximal end of the device instead of the distal end when in the second restrained configuration (Fig. 1D)). Claim 20 Sepetka discloses: The device of claim 18, see 102 rejection above. Sepetka does not explicitly disclose: wherein the permeable shell comprises a double layer of the braided mesh. However, Pereira in a similar field of invention teaches a device for treatment of a patient’s cerebral aneurysm 420 (see Fig. 1) in a second restrained configuration (see Fig. 1) with a hub 448 (see Fig. 1), and a permeable shell 424 (see Fig. 1) with a braided mesh (see [0042], braised tubes). Pereira further teaches: wherein the permeable shell 424 comprises a double layer (see Fig. 1, [0029], has an inner layer, 444 and an outer layer 430, hence a double layer) of the braided mesh. It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Pereira and teach a device for treatment of a patient’s cerebral aneurysm with the permeable shell comprises a double layer of the braided mesh. Motivation for such can be found in Pereira as this allows access to the volume of the aneurysm to place additionally embolic devices (see [0027]), furthermore this creates a device without exposed edges that can potentially damage the aneurysm wall. Claim 21 Sepetka discloses: The device of claim 18, see 102 rejection above. Sepetka does not explicitly disclose: wherein the permeable shell comprises multiple layers of the braided mesh. However, Pereira in a similar field of invention teaches a device for treatment of a patient’s cerebral aneurysm 420 (see Fig. 1) in a second restrained configuration (see Fig. 1) with a hub 448 (see Fig. 1), and a permeable shell 424 (see Fig. 1) with a braided mesh (see [0042], braised tubes). Pereira further teaches: wherein the permeable shell 424 comprises multiple layers (see Fig. 1, [0029], has an inner layer, 444 and an outer layer 430, hence has two layers, which is multiple layers) of the braided mesh. It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Pereira and teach a device for treatment of a patient’s cerebral aneurysm with the permeable shell comprises multiple layers of the braided mesh. Motivation for such can be found in Pereira as this allows access to the volume of the aneurysm to place additionally embolic devices (see [0027]), furthermore this creates a device without exposed edges that can potentially damage the aneurysm wall. Claim(s) 64 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sepetka in view of Mu et al (US 20240268832 A1), herein referenced to as “Mu”. Claim 64 Sepetka discloses: The device of claim 1, see 102 rejection above. Sepetka does not explicitly disclose: wherein a distal end of the hub is located in the inner cavity in the first unrestrained preset configuration. However, Mu in a similar field of invention teaches a device 1 (see Figs. 1-5) for treatment of a patient’s cerebral aneurysm (see Fig. 5) with a hub 2 (see Figs. 1-5) and a permeable shell 1 (see Figs. 1-5, [0031], metal wires) made from a plurality of elongate filaments ([0031], metal wires), wherein each of the plurality of filaments has a first gathered in the hub 2 (see [0032], bound into the developing mark) with a first unrestrained preset configuration (Fig. 4) with an inner cavity (see annotated Fig. 4 below) and a second unrestrained configuration (see Fig. 5). Mu further teaches: wherein a distal end (see annotated Fig. 4 below) of the hub 2 is located in the inner cavity (see annotated Fig. 4 below) in the first unrestrained preset configuration (see Fig. 4). PNG media_image4.png 554 708 media_image4.png Greyscale It would have been obvious for one of ordinary skill in the art before the effective filing date of the claimed invention to have modified Sepetka to incorporate the teachings of Mu and teach a device for treatment of a patient’s cerebral aneurysm with a distal end of the hub is located in the inner cavity in the first unrestrained preset configuration. Motivation for such can be found in Mu as this keeps the hub within neck of the aneurysm and prevent it from protruding out to the vascular lumen and inducing an embolism (see [0040]-[0041]). Conclusion THIS ACTION IS MADE FINAL. 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 nonprovisional extension fee (37 CFR 1.17(a)) 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 mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to RAIHAN R KHANDKER whose telephone number is (571)272-6174. The examiner can normally be reached Monday - Friday 7:00 PM - 3:00 PM. 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, Darwin Erezo can be reached at 571-272-4695. 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. RAIHAN R. KHANDKER Examiner Art Unit 3771 /RAIHAN R KHANDKER/Examiner, Art Unit 3771 /DARWIN P EREZO/Supervisory Patent Examiner, Art Unit 3771
Read full office action

Prosecution Timeline

Apr 29, 2024
Application Filed
Nov 01, 2025
Non-Final Rejection — §102, §103
Feb 05, 2026
Response Filed
Mar 07, 2026
Final Rejection — §102, §103 (current)

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Expected OA Rounds
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Grant Probability
99%
With Interview (+60.0%)
2y 11m
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