Prosecution Insights
Last updated: October 02, 2026
Application No. 18/740,064

HDAC INHIBITORS AND THERAPEUTIC USE THEREOF

Non-Final OA §DP
Filed
Jun 11, 2024
Priority
Dec 03, 2021 — provisional 63/285,558 +1 more
Examiner
ANDERSON, REBECCA L
Art Unit
Tech Center
Assignee
Tango Therapeutics Inc.
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
766 granted / 1044 resolved
+13.4% vs TC avg
Strong +24% interview lift
Without
With
+23.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
49 currently pending
Career history
1095
Total Applications
across all art units

Statute-Specific Performance

§101
2.6%
-37.4% vs TC avg
§103
18.8%
-21.2% vs TC avg
§102
24.1%
-15.9% vs TC avg
§112
32.8%
-7.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1044 resolved cases

Office Action

§DP
DETAILED ACTION Claims 1-29 are currently pending in the instant application and are rejected. 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 . 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 1-29 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-34 of U.S. Patent No. 12,043,607. Although the claims at issue are not identical, they are not patentably distinct from each other because the conflicting claims are drawn to compounds of the formula: PNG media_image1.png 300 246 media_image1.png Greyscale (conflicting claims 1 and 3), compositions comprising the compound (conflicting claims 2 and 4), and methods of treatment of non-small cell lung cancer (conflicting claims 5, 10, 15, 20, 25, 30), endometrial cancer (conflicting claim 6, 11, 16, 21, 26, 31), pancreatic cancer (conflicting claim 7, 12, 17, 22, 27, 32), cervical cancer (conflicting claim 8, 13, 18, 23, 28, and 33), cancer of unknown primary (conflicting claim 9, 14, 19, 24, 29, and 34), additionally comprising and anti PD-1 antibody (conflicting claims 15-24), specifically pembrolizumab (conflicting claims 25-34). The compound of the formula: PNG media_image1.png 300 246 media_image1.png Greyscale corresponds to the instant formula (I): PNG media_image2.png 142 264 media_image2.png Greyscale wherein R1, R3, R4, R6 and R8 are each H; R2 is PNG media_image3.png 84 90 media_image3.png Greyscale ; R5 is NH2; R7 is -Me; A is: PNG media_image4.png 66 100 media_image4.png Greyscale ; and L1 is a bond. Additionally, the compound of the ‘607 patent anticipates the compound: PNG media_image5.png 120 226 media_image5.png Greyscale of instant claim 20. Claims 1-29 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1, 10, 34, 35, 47-53, 57, and 73 of copending Application No. 19/101,393 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because the conflicting claims are drawn to methods for treating cancer with compounds of the formula (I): PNG media_image6.png 190 260 media_image6.png Greyscale with an anti-PD antibody (conflicting claim 1 and 10) wherein the anti-PD-1 antibody is pembrolizumab (conflicting claims 34 and 35) wherein the cancer is NSCLC, pancreatic cancer, endometrial cancer, cervical cancer, and cancer of unknown primary (conflicting claims 50-53) The compound utilized in the method claims of the ‘393 application corresponds to the instant formula (I): PNG media_image2.png 142 264 media_image2.png Greyscale wherein R1, R3, R4, R6 and R8 are each H; R2 is PNG media_image3.png 84 90 media_image3.png Greyscale ; R5 is NH2; R7 is -Me; A is: PNG media_image4.png 66 100 media_image4.png Greyscale ; and L1 is a bond. Additionally, the compound of the ‘393 application anticipates the compound: PNG media_image5.png 120 226 media_image5.png Greyscale of instant claim 20. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to REBECCA L ANDERSON whose telephone number is (571)272-0696. The examiner can normally be reached Monday-Friday from 6am-2pm. 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 Kosar can be reached at 571-272-0913. 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. /REBECCA L ANDERSON/Primary Examiner, Art Unit 1626 ____________________ 10 September 2026 Rebecca Anderson Primary Examiner Art Unit 1626, Group 1620 Technology Center 1600
Read full office action

Prosecution Timeline

Jun 11, 2024
Application Filed
Sep 14, 2026
Non-Final Rejection mailed — §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
73%
Grant Probability
97%
With Interview (+23.6%)
2y 4m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1044 resolved cases by this examiner. Grant probability derived from career allowance rate.

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