Prosecution Insights
Last updated: May 29, 2026
Application No. 18/726,587

FLEXICOAT BLOOD-INTERFACE MATERIALS FOR BIO-COMPATABLE IMPLANTS AND DEVICES

Non-Final OA §103
Filed
Jul 03, 2024
Priority
Jan 03, 2022 — provisional 63/296,048 +1 more
Examiner
MATTHEWS, WILLIAM H
Art Unit
3774
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
The UAB Research Foundation
OA Round
1 (Non-Final)
67%
Grant Probability
Favorable
1-2
OA Rounds
1y 6m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
537 granted / 806 resolved
-3.4% vs TC avg
Strong +22% interview lift
Without
With
+21.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
2 currently pending
Career history
816
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
64.7%
+24.7% vs TC avg
§102
13.4%
-26.6% vs TC avg
§112
11.1%
-28.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 806 resolved cases

Office Action

§103
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 . Applicant’s election without traverse of Group I (claims 1-16, product) in the reply filed on 8/19/2025 is acknowledged. Claims 17-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 8/19/2025. 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. Claim(s) 1-16 is/are rejected under 35 U.S.C. 103 as being unpatentable over Chen USPUB 20160184489 in view of Aizenberg USPUB 20180362875. Regarding claim 1, Chen disclose biocompatible implants or devices (para 0087) comprising a metallic structure (para 0061); and an organosilane plasma polymerization (OPP) coating disposed on a surface of the metallic structure (para 0086), the OPP coating disposed on bare metal of the metallic structure and forming a nano-textured surface (para 0086). Chen is silent as to the silica being inorganic. Aizenberg teaches biocompatible implants (para 0226) were known to comprise plasma treated (para 0030) nanoscale coatings (para 0109,0123) including silica (para 0122). IT would have been obvious before the effective filing date of the claimed invention to modify the Chen coating to include silica as taught in Aizenberg to be a suitable biomedical device plasma coating material. Regarding claim 2, see Chen paragraphs 0087-0088. Regarding claim 3, see Chen paragraph 0088. Regarding claim 4, see Chen paragraphs 0082-0086. Regarding claim 5, the limitation is a product by process limitation which does not appreciably provide structural features beyond the device coating in Chen. Regarding claim 6, the limitation is a product by process limitation which does not appreciably provide structural features beyond the device coating in Chen. Regarding claim 7, see Chen paragraph 0086. Regarding claim 8, Chen discloses a bio-compatible implant or device (para 0087) comprising a metallic structure (para 0061); and a composite coating disposed on a surface of the metallic structure (para 0086), the coating disposed on bare metal of the metallic structure and forming a nano-textured surface (para 0086). Chen is silent as to the coating comprising silica-DEA, silica-MEA or silica-TEA functionalized coating. Aizenberg teaches biocompatible implants (para 0226) were well known to comprise nanoscale coatings (para 0109,0123) including silica (para 0122) and functionalized amine groups (para 0037,0043). It would have been obvious before the effective filing date of the claimed invention to modify the Chen coating to include silica and amine functional groups as taught in Aizenberg to provide well known suitable biomedical device coating materials. Regarding claim 9, Aizenberg teaches dopamine (para 0037,0043). Regarding claim 10, Chen and Aizenberg teach polymerized coatings (para 0085). Regarding claim 11, Chen disclose stent or wire or catheter (para 0086) Regarding claim 12, Chen disclose nitinol or S/S (para 0088) Regarding claim 13, Chen and Aizenberg disclose plasma treatment as described supra. Regarding claim 14, the limitation is a product by process limitation which does not appreciably provide structural features beyond the device coating in Chen. Regarding claim 15, the limitation is a product by process limitation which does not appreciably provide structural features beyond the device coating in Chen. Regarding claim 16, Chen disclose the thickness (para 0086) Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to WILLIAM H MATTHEWS whose telephone number is (571)272-4753. The examiner can normally be reached Monday-Friday (9-5). 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 at 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. /WILLIAM H MATTHEWS/ Primary Examiner, Art Unit 3774
Read full office action

Prosecution Timeline

Jul 03, 2024
Application Filed
Dec 06, 2024
Response after Non-Final Action
Mar 10, 2025
Response after Non-Final Action
Apr 17, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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

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Prosecution Projections

1-2
Expected OA Rounds
67%
Grant Probability
88%
With Interview (+21.5%)
3y 4m (~1y 6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 806 resolved cases by this examiner. Grant probability derived from career allowance rate.

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