Prosecution Insights
Last updated: April 19, 2026
Application No. 17/696,904

MEMBRANE AND METHOD FOR CULTURE AND DIFFERENTIATION OF CELLS

Final Rejection §112
Filed
Mar 17, 2022
Examiner
KNIGHT, TERESA E
Art Unit
1634
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Oujiang Laboratory
OA Round
2 (Final)
65%
Grant Probability
Moderate
3-4
OA Rounds
3y 8m
To Grant
99%
With Interview

Examiner Intelligence

Grants 65% of resolved cases
65%
Career Allow Rate
307 granted / 475 resolved
+4.6% vs TC avg
Strong +50% interview lift
Without
With
+50.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
23 currently pending
Career history
498
Total Applications
across all art units

Statute-Specific Performance

§101
7.6%
-32.4% vs TC avg
§103
40.8%
+0.8% vs TC avg
§102
17.3%
-22.7% vs TC avg
§112
22.0%
-18.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 475 resolved cases

Office Action

§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 . This action is responsive to papers filed on Oct. 30, 2025. Claims 2, 3, 19 and 20 are withdrawn. Claims 1, 5 and 8 are currently amended. Claims 1, and 5-18 are examined below. Withdrawn Rejections The rejection of claim 5 under AIA 35 USC 112 for being indefinite is withdrawn in view of the claim amendment filed on Oct. 30, 2025. The rejection of claims 1, and 6-18 under AIA 35 U.S.C. 102(a)(1) as being anticipated by Wang et al. (IEEE, 2018) as evidenced by Wang et al. (Sci Rep. 2016) is withdrawn in view of the claim amendments in the Response of Oct. 30, 2025. The rejection of claim 4 under AIA 35 U.S.C. 102(a)(1) as being anticipated by Cui et al. (Appl. Material Interfaces, 2019) is withdrawn in view of the statement made in the Response filed on Oct. 30, 2025. The publication date of the Cui et al. reference is Jan. 7, 2019. This date is less than one year prior to the filing date (June 2, 2019) of the parent application (16/429,042) of the current application. Therefore, the priority date of the current application is July 2, 2019. As such, the Cui et al. reference is within a timeframe that a 102(b)(1) exception to the 102(a)(1) rejection could apply. On page 4 of the response filed on Oct. 20, 2025, it is asserted that the 102(b)(1)(a) exception applies – that is, the disclosure published in the Cui et al. reference is from the inventors. As such, the Cui et al. reference is not available as prior art and this rejection is withdrawn. The rejection of claim 5 under AIA 25 U.S.C. 103 as being unpatentable over Wang et al. (IEEE, 2018) in view of Beers et al. (Nat. Protocol, 2012) is withdrawn in view of the claim amendments in the Response of Oct. 30, 2025. Claim Objections Claim 5 is objected to because of the following informalities: the claim has been amended to recite “a enzyme” – standard language would be “an enzyme”. 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. Claim 1 and 5-18 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 recites “differentiating the hiPSCs on a membrane pre-coated with Matrigel". Matrigel® is a registered trademark of Corning. Its use in the claims instead of the associated generic description of the goods ("solubilized basement membrane preparation") renders this claim indefinite, as trademarks are used to identify the source of goods, not a particular material or product. See MPEP 2173.05 (u). Claims 5-18 ultimately depend from claim 1 and do not correct the indefiniteness of claim 1, as noted above. Dependent claim 5-18 are rejected on this basis. Conclusion No claims are allowed. If the objection and the indefiniteness associated with the use of a registered trademark in the claims is corrected, the claims would be in condition for allowance. 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 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 TERESA E KNIGHT whose telephone number is (571)272-2840. The examiner can normally be reached Monday-Friday 9-4. 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, Maria Leavitt can be reached at 571-272-1085. 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. /TERESA E KNIGHT/Primary Examiner, Art Unit 1634
Read full office action

Prosecution Timeline

Mar 17, 2022
Application Filed
Jul 26, 2025
Non-Final Rejection — §112
Oct 30, 2025
Response Filed
Feb 10, 2026
Final Rejection — §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

3-4
Expected OA Rounds
65%
Grant Probability
99%
With Interview (+50.4%)
3y 8m
Median Time to Grant
Moderate
PTA Risk
Based on 475 resolved cases by this examiner. Grant probability derived from career allow rate.

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