Prosecution Insights
Last updated: April 19, 2026
Application No. 18/191,589

COVALENT EGFR INHIBITORS AND METHODS OF USE THEREOF

Non-Final OA §112§DP
Filed
Mar 28, 2023
Examiner
ISMAIL, REHANA
Art Unit
1625
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
DANA-FARBER CANCER INSTITUTE, 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

§112 §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 cancelled all the claims of 06/15/2023 used for writing restriction/election of species. Since applicant cancelled all the claims, the restriction requirement is moot. Applicants provided a compliant species as follows Compound of formula I: PNG media_image1.png 167 197 media_image1.png Greyscale Species of cancer: non-small cell lung cancer Examiner did not find prior art for applicant’s elected species. Therefore, Markush search was extended to the full scope of independent claim 37. No prior art was found. Therefore, election of species requirement is withdrawn. Double patenting art was found for co-pending applications no. 18/191,574 (disclosed in the IDS). Claims 37-47 are examined in this office action. Current Status of 18/191,589 This Office Action is in response to the amended claims of 12/01/2025. Claims 37-47 are new and are examined in this office action Priority Effective filing date is 10/12/2020. Information Disclosure Statement The information disclosure statement (IDS) was submitted on 05/01/2023. The submission is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 39 and 42 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. Dependent Claims 39 and 42 recites limitation wherein R3 is “ PNG media_image2.png 53 121 media_image2.png Greyscale ”. There is insufficient antecedent basis for R3 as “ PNG media_image2.png 53 121 media_image2.png Greyscale ” in claim 37. Claim 37 does not recites R3 is “ PNG media_image2.png 53 121 media_image2.png Greyscale ” an alternative for compound of formula II. As drafted, R3 is “ PNG media_image2.png 53 121 media_image2.png Greyscale ” in claims 39 and 42 renders the metes and bounds of claims 39 and 42 undefined. Please note claim 42 have various structure where , R3 is “ PNG media_image2.png 53 121 media_image2.png Greyscale ”, for example PNG media_image3.png 126 173 media_image3.png Greyscale (page 4 of claims) , PNG media_image4.png 752 643 media_image4.png Greyscale (page 5 of claims) , PNG media_image5.png 768 660 media_image5.png Greyscale (page 6 if claims ) and PNG media_image6.png 725 650 media_image6.png Greyscale (page 8 of claims). Hence renders claims 39 and 42 indefinite. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 39 and 42 rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Dependent Claims 39 and 42 recites limitation R3 as “ PNG media_image2.png 53 121 media_image2.png Greyscale ”, which fails to properly further limit independent claim 37, since claim 37 has no limitations drawn to R3 as “ PNG media_image2.png 53 121 media_image2.png Greyscale ” for formula II. Please note claim 42 have various structure where , R3 is “ PNG media_image2.png 53 121 media_image2.png Greyscale ”, for example PNG media_image3.png 126 173 media_image3.png Greyscale (page 4 of claims) , PNG media_image4.png 752 643 media_image4.png Greyscale (page 5 of claims) , PNG media_image5.png 768 660 media_image5.png Greyscale (page 6 if claims ) and PNG media_image6.png 725 650 media_image6.png Greyscale (page 8 of claims). Thus claims 39 and 42 rejected under 35 U.S.C. 112(d). 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 37 are provisionally rejected on the ground of anticipatory nonstatutory double patenting as being anticipated over claims 22 and 24 of co-pending Application No 18/191,574 (reference application, disclosed in the IDS). Instant claims of 12/01/2025 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 22 and 24 discloses compound PNG media_image7.png 105 171 media_image7.png Greyscale and pharmaceutically acceptable salt, where A is a 5 membereed heteroaryl , PNG media_image8.png 42 42 media_image8.png Greyscale ; R1 is H; R2 corresponds to PNG media_image9.png 114 104 media_image9.png Greyscale wherein Y is O; L3 is NH, RE1= RE2= RE3 is H; R3 corresponds to PNG media_image10.png 77 105 media_image10.png Greyscale wherein Y is O , L3 is a bond, z is 1 and RE4 is H same as formula II of instant claim 37. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Claims 37,39 and 42 are rejected. Claims 38, 40-41 and 43-47 are objected to for depending on a rejected claim. Examiner did not find prior art on independent claim 37. Close art of Satijn et,al. (US-20230257479-A1) discloses the compound PNG media_image11.png 269 485 media_image11.png Greyscale . Instant claim does not allow for R2 to be methyl or R3 as “ PNG media_image2.png 53 121 media_image2.png Greyscale ”. An artisan skilled in the art could not envision the structural difference. Moreover, publication date of Satijn et.al. is after the prior date of current application. Thus, Satijn is a close art not a prior art. 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

Mar 28, 2023
Application Filed
Feb 25, 2026
Non-Final Rejection — §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

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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