Prosecution Insights
Last updated: October 01, 2026
Application No. 18/171,735

Imidazo[4,5-c]quinolin-2-one Compounds and Their Use in Treating Cancer

Non-Final OA §DP
Filed
Feb 21, 2023
Priority
Sep 17, 2015 — GB 1516504.6 +4 more
Examiner
AULAKH, CHARANJIT
Art Unit
1621
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Astrazeneca AB
OA Round
2 (Non-Final)
81%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
66%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
1441 granted / 1787 resolved
+20.6% vs TC avg
Minimal -14% lift
Without
With
+-14.5%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 0m
Avg Prosecution
61 currently pending
Career history
1817
Total Applications
across all art units

Statute-Specific Performance

§101
3.3%
-36.7% vs TC avg
§103
15.0%
-25.0% vs TC avg
§102
20.5%
-19.5% vs TC avg
§112
43.5%
+3.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1787 resolved cases

Office Action

§DP
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 . According to paper filed on July 16, 2026, the applicants have filed RCE. Claims 16-24 are pending in the application. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 16-24 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-6 of U.S. Patent No. 9,856,255, cited on applicant’s form 1449. Although the claims at issue are not identical, they are not patentably distinct from each other because it would have been obvious to one skilled in the art to treat cancer with compounds disclosed in claims 1-6 of the cited patent since the method of treating cancer using these compounds were present in the originally filed application 15/267,398 which matured into Patent 9,856,255. Furthermore, there was no restriction between the compounds and methods of treating cancer using compounds in application 15/267,398. Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHARANJIT AULAKH whose telephone number is (571)272-0678. The examiner can normally be reached Monday-Friday 7:00-3:30. 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, Clinton A Brooks can be reached at 571-270-7682. 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. /CHARANJIT AULAKH/ Primary Examiner, Art Unit 1621
Read full office action

Prosecution Timeline

Feb 21, 2023
Application Filed
Jan 02, 2026
Non-Final Rejection mailed — §DP
Apr 01, 2026
Response Filed
Jul 16, 2026
Request for Continued Examination
Jul 17, 2026
Response after Non-Final Action
Aug 26, 2026
Non-Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12747234
KINASE INHIBITORS FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES
3y 5m to grant Granted Sep 29, 2026
Patent 12747263
ORALLY ACTIVE LEUKEMIA INHIBITORY FACTOR (LIF) ANTAGONISTS FOR THE TREATMENT OF CANCER
3y 2m to grant Granted Sep 29, 2026
Patent 12741948
BENZOTHIAZOLE AND QUINOLINE DERIVATIVES AND THEIR USE
3y 6m to grant Granted Sep 22, 2026
Patent 12740987
SOLUBLE PHARMACEUTICAL COMPOSITIONS COMPRISING SALTS OF DISUBSTITUTED 1, 2, 4-TRIAZINE COMPOUND
2y 8m to grant Granted Sep 22, 2026
Patent 12735421
PLASMIN INHIBITOR, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
3y 1m to grant Granted Sep 15, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
81%
Grant Probability
66%
With Interview (-14.5%)
2y 0m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1787 resolved cases by this examiner. Grant probability derived from career allowance rate.

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