Prosecution Insights
Last updated: May 29, 2026
Application No. 18/007,960

Azirine Containing Compounds as Anti-Angiogenesis Agents and a Process for the Preparation Thereof

Non-Final OA §102§112
Filed
Dec 02, 2022
Priority
Jun 04, 2020 — IN 202011023422 +1 more
Examiner
KIFLE, BRUCK
Art Unit
1624
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
OA Round
3 (Non-Final)
79%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allowance Rate
1360 granted / 1718 resolved
+19.2% vs TC avg
Strong +16% interview lift
Without
With
+15.9%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 9m
Avg Prosecution
30 currently pending
Career history
1745
Total Applications
across all art units

Statute-Specific Performance

§101
3.8%
-36.2% vs TC avg
§103
16.9%
-23.1% vs TC avg
§102
10.0%
-30.0% vs TC avg
§112
50.9%
+10.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1718 resolved cases

Office Action

§102 §112
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 amendments and remarks filed October 6, 2025 have been received and reviewed. Claims 13-29 are now pending in this application. Claim Rejections - 35 USC § 112 Claims 13-29 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. i) It is noted that R1 is now limited to C2-C12 alkyl groups, optionally substituted, to overcome the prior art rejections of the previous office action. The group “alkenyl (C1-C12)” should also be amended to have at least two carbons (C2-C12) because al alkenyl cannot be made up only one carbon. The smallest alkenyl is ethenyl. ii) The term “(hetero)aryl,” as well as, “carboxyl (hetero) aryl” are still indefinite because it is not known how many atoms are present, how many and what kind of heteroatoms are involved, what size ring is intended and how many rings are present. It is unclear what the purpose of the parentheses represents, are groups, such as a carboxyl substituted heteroaryl intended? A clarification is still required. iii) Claim 14 depends from claim 13 but includes compounds not embraced by claim 13. Thus, the compounds “(18),” “(25)” and “(49)” lack antecedent basis in claim 13. Claim 14 is improperly dependent from claim 13. Thousands of compounds still on the compound of claim 13. Thus, a complete search of the entire genus could not be performed. The compound of formula (I) can be reduced to compounds wherein R1 is ethyl, R2 is H and R3 is H. Below are exemplary prior art rejections of formula (I). Claim Rejections - 35 USC § 102 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claim 13 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Shin et al. (Chemistry Letters (1976), (10), 1063-6). The claim reads on the compounds depicted below. See Abstract. RN 62317-56-0 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-ethyl-, ethyl ester (CA INDEX NAME) PNG media_image1.png 143 265 media_image1.png Greyscale RN 62317-57-1 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-propyl-, ethyl ester (CA INDEX NAME) PNG media_image2.png 143 298 media_image2.png Greyscale RN 62317-58-2 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-(1-methylethyl)-, ethyl ester (CA INDEX NAME) PNG media_image3.png 143 265 media_image3.png Greyscale . Claim 13 is again rejected under 35 U.S.C. 102(a)(1) as being anticipated by Sakamoto et al. Organic Letters (2011), 13(24), 6374-6377). The claim reads on the compounds depicted below. See Abstract. RN 1346635-64-0 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-(2-phenylethyl)-, ethyl ester, (2S)- (CA INDEX NAME) PNG media_image4.png 209 370 media_image4.png Greyscale RN 1346635-70-8 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-[(1E)-2-phenylethenyl]-, ethyl ester, (2S)- (CA INDEX NAME) PNG media_image5.png 228 370 media_image5.png Greyscale RN 1346635-71-9 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-[(1E)-2-(4-methoxyphenyl)ethenyl]-, ethyl ester, (2S)- (CA INDEX NAME) PNG media_image6.png 226 428 media_image6.png Greyscale RN 1346635-73-1 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-[(1E)-2-(4-fluorophenyl)ethenyl]-, ethyl ester, (2S)- (CA INDEX NAME) PNG media_image7.png 226 399 media_image7.png Greyscale . Claim 13 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Hassner et al. (Journal of the American Chemical Society (1968), 90(11), 2869-75). The claim reads on the compound depicted below. See Abstract. RN 18709-39-2 CAPLUS CN 2H-Azirine, 3-(2-phenylethyl)- (CA INDEX NAME) PNG media_image8.png 131 250 media_image8.png Greyscale . Claim 13 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Qi et al. ( Chemical Communications (Cambridge, United Kingdom) (2011), 47(27),7848-7850). The claim reads on the compound depicted below. See Abstract. RN 1318796-75-6 CAPLUS CN 2H-Azirine-2-carboxylic acid, 3-(2-phenylethyl)-, methyl ester (CA INDEX NAME) PNG media_image9.png 159 338 media_image9.png Greyscale . 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 BRUCK KIFLE whose telephone number is (571)272-0668. The examiner can normally be reached 8 AM - 6 PM, M-F. 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, Jeffrey H. Murray can be reached at 571-272-9023. 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. October 24, 2025 /BRUCK KIFLE/Primary Examiner, Art Unit 1624
Read full office action

Prosecution Timeline

Show 3 earlier events
Sep 03, 2025
Examiner Interview Summary
Oct 06, 2025
Response Filed
Oct 28, 2025
Final Rejection mailed — §102, §112
Dec 16, 2025
Response after Non-Final Action
Jan 22, 2026
Response after Non-Final Action
Mar 31, 2026
Non-Final Rejection mailed — §102, §112
Apr 13, 2026
Interview Requested
Apr 20, 2026
Examiner Interview Summary

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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
79%
Grant Probability
95%
With Interview (+15.9%)
1y 9m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1718 resolved cases by this examiner. Grant probability derived from career allowance rate.

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