Prosecution Insights
Last updated: August 06, 2026
Application No. 18/562,608

PYRIDO[4,3-D]PYRIMIDINE COMPOUNDS CAPABLE OF INHIBITING KRAS MUTANT PROTEINS

Non-Final OA §102
Filed
Nov 20, 2023
Priority
May 28, 2021 — GB 2107637.7 +2 more
Examiner
NOLAN, JASON MICHAEL
Art Unit
1623
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Redx Pharma PLC
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
38%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
246 granted / 371 resolved
+6.3% vs TC avg
Minimal -28% lift
Without
With
+-28.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
49 currently pending
Career history
421
Total Applications
across all art units

Statute-Specific Performance

§101
4.1%
-35.9% vs TC avg
§103
25.3%
-14.7% vs TC avg
§102
21.1%
-18.9% vs TC avg
§112
32.9%
-7.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 371 resolved cases

Office Action

§102
DETAILED ACTION Notice of AIA Status The instant application, filed on or after 16 March 2013, is being examined under the first inventor to file provisions of the Leahy-Smith America Invents Act (AIA ). If the status of the application as subject to AIA or pre-AIA is incorrect, any correction of the statutory basis (e.g., changing from AIA to pre-AIA ) for a rejection under 35 U.S.C. §§ 102 and/or 103 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. Status of the Claims The listing of claims filed 25 July 2024 has been examined. Claims 1–22 are pending. Claims 1, 4, 5, 9, 11–13, 15–18, and 20–22 are amended. Priority The instant application was filed 20 November 2023; is a national stage application of PCT/GB2022/051367, filed 27 May 2022, and claims priority to GB 2118635.8, filed 21 December 2021, and GB 2107637.7, filed 28 May 2021. Applicant’s claim for foreign priority is acknowledged, and a copy of the priority document has been received. Information Disclosure Statement The information disclosure statement (IDS) submitted on 27 November 2023 is acknowledged and has been considered. Objections to the Specification The abstract of the disclosure is objected to because it does not describe any structural features of the claimed compounds (e.g., pyrido[4,3-d]pyrimidin-7-yl) so as to enable one to quickly determine the general nature of the invention. Appropriate correction is required. For guidelines for the preparation of patent abstracts, see MPEP § 608.01(b) (Explaining: The abstract should be in narrative form and avoid legal phraseology (e.g., means, said), terms referring to purported merits of the invention (e.g., new, novel), and phrases that can be implied (e.g., The disclosure concerns, The disclosure defined by this invention). The language should be clear and concise, and not repeat information given in the title. It should not compare the invention with the prior art. The abstract is generally limited to a single paragraph within the range of 50 to 150 words in length.). Claim Objections Claims 2–21 are objected to for minor informalities. Claims 2–21 depend from claim 1. An independent claim introduces subject matter for the first time and commonly recites the indefinite article “A.” A dependent claim referring back to prior claim and to the same subject matter should recite the definite article “The.” Such formal claim drafting provides proper antecedent basis for the claimed subject matter and avoids ambiguity, therefore improving the clarity of the claims. In this case, each of claims 2–21 recites “A compound . . .,” which can cause confusion as to whether a new method is claimed or whether the claim is referring to and further defining the method recited in the referenced claims. Appropriate correction is required. Claim Interpretation Claim 1 recites, “wherein R1 and R5 are selected such that NR1R5 comprises no more than a single amine.” The term amine is defined in the specification to encompass primary, secondary, and tertiary amines. The term does not include amides: “For the avoidance of doubt, the term “amine” as used herein excludes amides and lactams.” (Spec., ¶46). Claim 1 states when -NR1R5 form a ring, the ring is heterocycloalkyl. The specification defines heterocycloalkyl and heteroaryl using their ordinary meaning. (Id., ¶¶113–128). Therefore, a ring formed with -NR1R5 cannot be aromatic. Claim Rejections - 35 U.S.C. § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. § 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. (i) Claims 1–15 and 17–22 are rejected under 35 U.S.C. § (a)(2) as being anticipated by US 2023/0072276 A1, filed 15 December 2021; claiming benefit of 15 December 2020; 11 March 2021; and 22 March 2021 filing dates of U.S. Provisional Apps. (“Wang”). Wang discloses compounds of Formula (I), including, e.g., Examples 1, 4, 71, 376, and 522. (Wang, ¶¶7, 522; 533; 813; 1723; 2176). PNG media_image1.png 261 307 media_image1.png Greyscale PNG media_image2.png 231 292 media_image2.png Greyscale PNG media_image3.png 218 259 media_image3.png Greyscale PNG media_image4.png 263 301 media_image4.png Greyscale PNG media_image5.png 215 232 media_image5.png Greyscale Wang Examples reads on the claims when R1 and R5 together form a heterocyclic ring substituted by R9 groups (alkyl, OR12 (H)); and when R1 is an alkyl-heterocycloalkyl. Wang discloses pharmaceutical compositions comprising the compounds of Formula (I) and use thereof for treating cancer having a KRAS mutation. (Id., claims 62–85). Wang discloses other compounds. Applicant is encroached to review Wang and amend the claims to avoid the entire disclosure of Wang. (ii) Claims 1–3, 5, 9–11, 13, 14, and 16–22 are rejected under 35 U.S.C. § (a)(2) as being anticipated by WO 2022/247770; filed 23 May 2022; claiming priority to 24 May 2021; 29 September 2021; and 7 January 2022 (CN priority apps.) (“Xu”). Xu discloses compounds of Formula I, including compound 48. (Xu, pp. 2, 34). PNG media_image6.png 135 155 media_image6.png Greyscale Xu discloses the compounds are for use in treating diseases related to Ras. (Id., Abstract). Xu discloses other compounds. Applicant is encroached to review Xu and amend the claims to avoid the entire disclosure of Xu. Conclusion No claims are allowed. Communication Any inquiry concerning this communication or earlier communications from the examiner should be directed to Jason Nolan at (571) 272-2480. The examiner can normally be reached Monday through Friday between 9:00–5:00. 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 submit an Automated Interview Request: http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Adam Milligan, can be reached on 571-270-7674. 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. /J.M.N./Patent Examiner, Art Unit 1623 /ADAM C MILLIGAN/Supervisory Patent Examiner, Art Unit 1623
Read full office action

Prosecution Timeline

Nov 20, 2023
Application Filed
Apr 16, 2026
Non-Final Rejection mailed — §102 (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
66%
Grant Probability
38%
With Interview (-28.0%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 371 resolved cases by this examiner. Grant probability derived from career allowance rate.

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