Prosecution Insights
Last updated: September 17, 2026
Application No. 18/699,303

CYRSTALLINE FORMS OF RIP1 INHIBITOR

Final Rejection §103§112§DP
Filed
Apr 08, 2024
Priority
Oct 22, 2021 — CN PCT/CN2021/125895 +1 more
Examiner
SHIAO, REI TSANG
Art Unit
1691
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Sironax Ltd.
OA Round
2 (Final)
80%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
46%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
1645 granted / 2061 resolved
+19.8% vs TC avg
Minimal -34% lift
Without
With
+-33.7%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
51 currently pending
Career history
2086
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
29.3%
-10.7% vs TC avg
§102
8.8%
-31.2% vs TC avg
§112
29.8%
-10.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 2061 resolved cases

Office Action

§103 §112 §DP
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 . DETAILED ACTION Priority and Status of Claims 1. This application is a 371 of PCT/CN2022/126631 10/21/2022, which claims benefit of the foreign application: PCT/CN2021/125895 10/22/2021. 2. Amendment of claims 1, 3-4, 6-20, 23-26, 28-30 and 33, and cancelation of claims 2, 5, 27 and 32 in the amendment filed on 7/21/2026 is acknowledged. Claims 1, 3-4, 6-26, 28-31 and 33 are pending in the application. Responses to Amendments/Arguments 3. The rejection of claims 1, 3-4, 6-26, 28-31 and 33 under 35 U.S.C. 112 (b) has been overcome in the amendment filed on 7/21/2026. Since claims 2, 5, 27 and 32 have been canceled, therefore the rejection of claims 2, 5, 27 and 32 under 35 U.S.C. 112 (b) has been obviated herein. 4. Since claim 32 has been canceled, therefore the rejection of claim 32 under 35 U.S.C. 112 (a) has been obviated herein. 5. Applicant's arguments regarding the rejection of claim 29 under 35 U.S.C. 112(a) have been fully considered but they are not persuasive. Applicants state “Claim 29 depends from claim 1. Thus, the thermodynamically stable form of crystals is incorporated into claim 29, rendering claim 29 enabled to produce the thermodynamically stable form of crystals.”, see page 11. However, applicants fail to disclose the instant type A of the compound in claim 1 still exist and can produce the thermodynamically stable form of crystals. Moreover, applicants do not disclose the instant crystalline, after mixing, grinding, compressing would be not transformed into another thermodynamically stable form(s) (i.e., type C). Therefore the rejection of claim 29 under 35 U.S.C. 112(a) is maintained. 6. Applicant's arguments regarding the rejection of claims 30-31 and 33 under 35 U.S.C. 103 (a) over Zhang et al. ‘859 have been fully considered but they are not persuasive. Applicants state “claim 30 depends from claim 1, the rejection under 35 U.S.C. 103(a) with regard to claim 1 has likewise been overcome”, see page 11. However, the instant crystalline type A or C would be dissolved into a free form after administration in a patient, thus it will be no distinct from Zhang et al. ‘859 free form for treating disease or condition. Therefore the rejection of claims 30-31 and 33 under 35 U.S.C. 103(a) over Zhang et al. ‘859 is maintained. The rejection of claims 1, 3, 14, 24 and 29 under 35 U.S.C. 103(a) over Zhang et al. ‘859 has been overcome in the amendment filed on 7/21/2026. Since claims 2 and 32 have been canceled, therefore the rejection of claims 2 and 32 under 35 U.S.C. 103(a) has been obviated herein. 7. Applicant's arguments regarding the rejection of claim 30 under the obviousness-type double patenting over Zhang et al. ‘221 have been fully considered but they are not persuasive. Applicants state “Zhang et al. ‘221 is a national phase patent of WO'859. As stated above, claims 1-2, 24, and 29-30 are not obvious over WO '859. For the same reasons, these claims are likewise not obvious over the claims of US'221. Withdrawal of the nonstatutory obviousness-type double patenting rejection is respectfully requested.”, see page 12. However, the instant crystalline type A or C would be dissolved into a free form after administration in a patient, thus it will be no distinct from Zhang et al. ‘221 free form for treating disease or condition. Therefore claim 4 of Zhang et al. ‘221 still renders obvious over the instant invention. Since a terminal disclaimer against Zhang et al. ‘221 has not been filed to the Office, therefore the rejection of claim 30 under the obviousness-type double patenting over Zhang et al. ‘221 is maintained. Applicant are requested to file a terminal disclaimer to overcome the rejection. 8. Claims 1, 3-4, 6-26 and 28 are neither anticipated nor rendered obvious over the record, and therefore are allowable. 9. THIS ACTION IS MADE FINAL. Applicants are 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 mailing date of this final action. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to REI TSANG SHIAO whose telephone number is (571)272-0707. The examiner can normally be reached on 8:30 am-5:00 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, Renee Claytor can be reached on 571-272-8394. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /REI TSANG SHIAO/ Rei-tsang Shiao, Ph.D.Primary Examiner, Art Unit 1691 August 25, 2026
Read full office action

Prosecution Timeline

Apr 08, 2024
Application Filed
Apr 21, 2026
Non-Final Rejection mailed — §103, §112, §DP
Jul 21, 2026
Response Filed
Aug 27, 2026
Final Rejection mailed — §103, §112, §DP (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
80%
Grant Probability
46%
With Interview (-33.7%)
2y 1m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 2061 resolved cases by this examiner. Grant probability derived from career allowance rate.

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