Prosecution Insights
Last updated: April 19, 2026
Application No. 18/259,112

SUBSTITUTED IMIDAZO[1,5-b]PYRIDAZINE COMPOUNDS AS KINASE INHIBITORS AND USE THEREOF

Non-Final OA §DP
Filed
Jun 23, 2023
Examiner
ISMAIL, REHANA
Art Unit
1625
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Impact Therapeutics (Shanghai), Inc.
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
3y 4m
To Grant
99%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
56 granted / 71 resolved
+18.9% vs TC avg
Strong +29% interview lift
Without
With
+29.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
41 currently pending
Career history
112
Total Applications
across all art units

Statute-Specific Performance

§101
4.0%
-36.0% vs TC avg
§103
27.3%
-12.7% vs TC avg
§102
20.0%
-20.0% vs TC avg
§112
25.5%
-14.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 71 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 . 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. Election/Restrictions Applicant's election with traverse of election of species in the reply filed on 13 January 2026 is acknowledged. The traversal is on the ground(s) that search of the elected species would likely uncover art of interest to other species. This is not found persuasive because the species are not regarded as similar structure (see page 4-7 of the office action of 11/14/15). The requirement is still deemed proper and is therefore made FINAL. Applicants provided a compliant species as follows PNG media_image1.png 468 838 media_image1.png Greyscale Examiner did not find prior art for applicant’s elected species. Therefore, Markush search was extended to the full scope of independent claim 1. No prior art was found. Therefore, election of species requirement is withdrawn. Double patenting art was found for co-pending applications no. 19/253,018. Claims 1-11 and 16-24 are examined in this office action. Current Status of 18/259,112 This Office Action is in response to the amended claims of 06/23/2023. Claims 1-9, 11 and 16 are currently amended; claims 10 are original; and claims 17-24 are new. are examined in this office action. Claims 1-11 and 16-24 are examined in this office action. Priority Effective filing date is 12/24/2021. Acknowledgment is made of applicant’s claim for foreign priority under 35 U.S.C. 119 (a)-(d). Information Disclosure Statement The information disclosure statement (IDS) was submitted on 09/25/2023, 07/22/2025. The submission is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. 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 1-11 and 16-24 are provisionally rejected on the ground of anticipatory nonstatutory double patenting as being anticipated over claims 1,3-4, 6, 8-10 and 15-24 of co-pending Application No 19/253,018 (reference application). Instant claims of 06/23/2023 was used to write this rejection. Although the claims at issue are not identical, they are not patentably distinct from each other because Reference claims 1,3-4, 6, 8-10,15-18 and 24 discloses compound of formula I PNG media_image2.png 158 215 media_image2.png Greyscale and pharmaceutically acceptable salt, where A1, A2 and A5 are N: A4 is CR5 and N where R5 is H; A6- is CR5 wherein R5 is halogen, C1-C6 alkyl, C2-C6 alkenyl, and C2-C6 alkynyl; R3 is H; and R4 is C1-C6 alkyl same as instant claims 1-11 and 16-18. Reference claims 10 (page 10, lines 23-24),18(page 17, lines 19-20), and 24(page 24, lines 25-26), discloses the compound (R)-4-( 4-(1-isopropyl-IH-pyrazol-5-yl)-7-(IH-pyrazol-5-yl)imidazo[ 1,5-b ]pyridazin-2-yl)-3-methylmorpholine same as instant claim 11(page 9, lines 15-16) thus claims 1-11 and 16-18 are anticipated. Reference claims 19 ad 23 disclose method of treating or preventing ATR kinase mediated disease same as instant claim 19. Reference claims 20 discloses treatment of cancer same as instant claims 20. Reference claims 21-23 discloses combination therapy of compound of formula I with anticancer agent and radiotherapy same as instant claims 22-24. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion No claims are allowed as written. Examiner did not find prior art for independent claim 1. Close art of Bo et,al (US 20230295166) discloses the compound PNG media_image3.png 261 373 media_image3.png Greyscale where the circled area depicts the difference with instant independent claim 1, where in R1 is H and there is a bicyclo moiety. A person skilled in the art would not be able to envision this structural difference hence Bo et. al. is a close art and not a prior art. Moreover, the publication date is after the priority date of current application. Applicant is encouraged to draw the structure of compounds in claim 11 to avoid future 112 rejections. U.S. Patent No. 12479848(not published) app no. 17/618,362 is not a double patenting art because reference claims are directed to compounds of formula PNG media_image4.png 194 260 media_image4.png Greyscale where A6 is CH which is not as same as formula I PNG media_image5.png 112 168 media_image5.png Greyscale of instant claim wherein R1 is halogen, an optionally substituted C1-C6 alkyl, an optionally substituted C3-C6 cycloalkyl, an optionally substituted C2-C6 alkenyl, or an optionally substituted C2-C6 alkynyl. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Rehana Ismail whose telephone number is (703)756-4776. The examiner can normally be reached Monday-Friday 9:00am-5:00pm. 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, Andrew D Kosar can be reached at (571)272-913. 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. /R.I./Examiner, Art Unit 1625 /JOHN S KENYON/Primary Patent Examiner, Art Unit 1625
Read full office action

Prosecution Timeline

Jun 23, 2023
Application Filed
Feb 23, 2026
Non-Final Rejection — §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

1-2
Expected OA Rounds
79%
Grant Probability
99%
With Interview (+29.4%)
3y 4m
Median Time to Grant
Low
PTA Risk
Based on 71 resolved cases by this examiner. Grant probability derived from career allow rate.

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