Prosecution Insights
Last updated: April 19, 2026
Application No. 18/557,487

SMALL MOLECULE INHIBITORS OF KRAS G12C MUTANT

Non-Final OA §112
Filed
Oct 26, 2023
Examiner
YOUNGBLOOD, WILLIAM JUSTIN
Art Unit
1629
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Merck Sharp & Dohme LLC
OA Round
1 (Non-Final)
63%
Grant Probability
Moderate
1-2
OA Rounds
3y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allow Rate
32 granted / 51 resolved
+2.7% vs TC avg
Strong +40% interview lift
Without
With
+39.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
35 currently pending
Career history
86
Total Applications
across all art units

Statute-Specific Performance

§101
2.8%
-37.2% vs TC avg
§103
29.2%
-10.8% vs TC avg
§102
24.7%
-15.3% vs TC avg
§112
25.2%
-14.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 51 resolved cases

Office Action

§112
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 . Status of the Claims Claims 1-23 are pending in the instant application and subject to examination herein. Information Disclosure Statement The information disclosure statements (IDS) submitted on 12/11/2024 and 02/02/2026 are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. Claim Rejections - 35 USC § 112(b) 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. Claim 18 is 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. Claim 18 is drawn to a group of specific compounds but does not illustrate or articulate what are the specific compounds being claimed. MPEP § 2173.05(s) states the following: Where possible, claims are to be complete in themselves. Incorporation by reference to a specific figure or table “is permitted only in exceptional circumstances where there is no practical way to define the invention in words and where it is more concise to incorporate by reference than duplicating a drawing or table into the claim. Incorporation by reference is a necessity doctrine, not for applicant’s convenience.” Ex parte Fressola, 27 USPQ2d 1608, 1609 (Bd. Pat. App. & Inter. 1993). Compounds to be claimed in claim 18 must each be incorporated into the claim by drawing or by their chemical names. Since the compounds can be incorporated by name, it is not the case that there is no practical way to define the invention in words. Claims Free of the Prior Art Claims 1-17 and 19-22 are allowed. The following is an examiner’s statement of reasons for allowance: Prior art does not teach or reasonably suggest, alone or in combination, a compound of Formula (I) or pharmaceutically acceptable salt thereof, as claimed in claim 1. Prior art does not teach or reasonably suggest, alone or in combination, a pharmaceutical composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt thereof, as claimed in claim 1 together with a pharmaceutically acceptable carrier, including comprising an additional anti-cancer agent. Prior art does not teach or reasonably suggest, alone or in combination, a method of inhibiting KRAS G12C protein comprising contacting KRAS G12C protein with the compound of claim 1 or the pharmaceutically acceptable salt thereof. Prior art does not teach or reasonably suggest, alone or in combination, a method of treating cancer comprising administering a compound of claim 1 or the pharmaceutically acceptable salt thereof to a subject in need thereof, including wherein the method includes administering an additional active agent to the subject. Closest Prior Art The closest prior art is found in Shibata (WO 2021/085653 A1)1. Shibata discloses an antitumor agent comprising a compound or a pharmaceutically acceptable salt thereof that covalently binds to GTP-bound KRASG12C as an active ingredient (Abstract). Shibata discloses a genus of compounds as part of the invention disclosed therein, designated as Shibata’s Formula (i), shown below (paragraph [0010]: page 5, lines 8-10): PNG media_image1.png 202 554 media_image1.png Greyscale Shibita discloses that moieties “A”, “D” and “E” are ring systems (paragraph [0010]: page 5, lines 12-14), and further discloses specific compounds that are similar to the genus of instant Formula (I), for example Shibata’s “Example 1”2 shown below (paragraph [0332]) Claim Number(s) of Instant Application Instant Application Shibata 1 PNG media_image2.png 304 406 media_image2.png Greyscale wherein: PNG media_image3.png 428 716 media_image3.png Greyscale Shibata’s “Example 1” differs from the scope of instant Formula (I) in that the polycyclic ring system comprising Shibata’s rings “A” and “D” does not include an aliphatic bridge as found in instant Formula (I), and Shibata’s ring “D” is a phenyl rather than a bicyclic heteroaryl ring system, and further because the linking group between Shibata’s polycyclic ring system (A + D) and the phenyl ring adjacent to the beta-amino acrylamide moiety is an amide linking group in Shibata’s Example 1, whereas instant Formula (I) allows only a keto group in this position. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to W. JUSTIN YOUNGBLOOD whose telephone number is (703)756-5979. The examiner can normally be reached on Monday-Thursday from 8am to 5pm. The examiner can also be reached on alternate Fridays. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Jeffrey S. Lundgren, can be reached at telephone number (571) 272-5541. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center to authorized users only. Should you have questions about access to the USPTO patent electronic filing system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via a variety of formats. See MPEP § 713.01. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) Form at https://www.uspto.gov/InterviewPractice. /W.J.Y./Examiner, Art Unit 1629 1 Cited in Applicant’s Information Disclosure Statement dated 12/11/2024. 2 3-cyano-N-(3-(2-ethyl-1-methyl-6-(trifluoromethyl)-1H-benzo[d]imidazol-5-yl)phenyl)-4-((E)-4-(((1r,4r)-4- methoxycyclohexyl)amino)but-2-enamido)benzamide
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Prosecution Timeline

Oct 26, 2023
Application Filed
Feb 26, 2026
Non-Final Rejection — §112 (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
63%
Grant Probability
99%
With Interview (+39.6%)
3y 7m
Median Time to Grant
Low
PTA Risk
Based on 51 resolved cases by this examiner. Grant probability derived from career allow rate.

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