Prosecution Insights
Last updated: April 19, 2026
Application No. 18/482,098

CDK Inhibitors And Their Use As Pharmaceuticals

Non-Final OA §103§112
Filed
Oct 06, 2023
Examiner
ROBINSON, MIKHAIL O'DONNEL
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Prelude Therapeutics Incorporated
OA Round
1 (Non-Final)
57%
Grant Probability
Moderate
1-2
OA Rounds
3y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allow Rate
59 granted / 103 resolved
-2.7% vs TC avg
Strong +48% interview lift
Without
With
+47.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
50 currently pending
Career history
153
Total Applications
across all art units

Statute-Specific Performance

§101
3.8%
-36.2% vs TC avg
§103
41.6%
+1.6% vs TC avg
§102
20.9%
-19.1% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 103 resolved cases

Office Action

§103 §112
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 . 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 33-39 and 47 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. Regarding claims 33-39, the compounds of formula II-VIII renders the claim indefinite because it is unclear whether the limitations of R1-R2 and R4-R6 are of the same limitations of claim 1 since claim 1 is directed to a compound of formula I. Claims 33-39 depend from claim 1 but fails to specify if the R1-R2 and R4-R6 are of the same embodiments as of claim 1. For the purpose of prior art examiner is interpreting the above claims to have the same embodiments as of claim 1 in terms of R1-R2 and R4-R6. Claim 47 recites the limitation "The method according to claim 45 " in line 1. There is insufficient antecedent basis for this limitation in the claim. Claim 45 as illustrated by the amended claims is canceled, thus the limitation of “the method according to claim 45” is of insufficient antecedent basis of being dependent from a canceled claim. For prior art purposes, examiner is interpreting the above limitation to be “The method according to claim 44”. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1, 16, 24, 29, 31, 33-35, 37-38, 40-42, 44, 47-48, 50 and 55 are rejected under 35 U.S.C. 103 as being unpatentable over He et al. (WO 2022155941 A1). Regarding claims 1, 16, 24, 29, 31, 33-35, 37-38, 40-42, 44, 47-48, 50 and 55, He teaches a method for treating a disease or disorder associated with CDK2, comprising administering to the patient a therapeutically effective amount of a compound of Formula (I) PNG media_image1.png 113 253 media_image1.png Greyscale , a pharmaceutically acceptable salt, or a stereoisomer thereof, and a pharmaceutically acceptable carrier to inhibit the activity of CDK2 (relevant to claims 42, 48 and 55) (Page 3, 3rd para.). He teaches the composition being administered orally to treat the optionally claimed cancers of breast cancer, HER2+/HER- metastatic breast cancer, lung cancer, ovarian cancer and acute myeloid leukemia (relevant to claims 44 and 47) (Page 3, 3rd para.) and in certain embodiments the compound is administered with a second therapeutic agent selected from a list which includes letrazole, fulvestrant and temozolomide (relevant to claim 50) (Page 3, 5th para., Page 59-60)). Of the above Formula (I) He teaches compound 8 PNG media_image2.png 102 256 media_image2.png Greyscale , compound 30 PNG media_image3.png 98 235 media_image3.png Greyscale compound 101 PNG media_image4.png 98 236 media_image4.png Greyscale , compound 144 PNG media_image5.png 101 250 media_image5.png Greyscale and compound 207 PNG media_image6.png 100 301 media_image6.png Greyscale wherein to claimed invention R5 is an alkyl (relevant to claim 24), R2 is C1-C6 alkyl (relevant to claim 29) and R1 is F or CF3 (relevant to claims 31). Therefore, it would have been obvious to someone of ordinary skill in the art at the time of filling to have constructed the compounds of claims 33-35, 37-38 and 40-41 of PNG media_image7.png 204 669 media_image7.png Greyscale PNG media_image8.png 187 375 media_image8.png Greyscale of claimed invention from the teachings of He. One would be motivated to do so from the above structures taught by He, on that the substituents on the thiazole ring are of positional isomers thus having similar properties as of MPEP 2144.09 (II): Compounds which are position isomers (compounds having the same radicals in physically different positions on the same nucleus) or homologs (compounds differing regularly by the successive addition of the same chemical group, e.g., by -CH2- groups) are generally of sufficiently close structural similarity that there is a presumed expectation that such compounds possess similar properties. In re Wilder, 563 F.2d 457, 195 USPQ 426 (CCPA 1977). The compounds taught by He are CDK2 inhibitors as the instantly claimed compounds and there is no evidence illustrated by claimed invention that the isomers are unexpectedly better than the compounds of He. There is a reasonable expectation of constructing the compounds of claims 33-35, 37-38 and 40 of claimed invention from the teachings of He as CDK2 inhibitors to treat the same claimed cancers . Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MIKHAIL O'DONNEL ROBINSON whose telephone number is (571)270-0777. The examiner can normally be reached Monday-Friday 7:30am-5:30pm. 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, Kortney Klinkel can be reached at 571-270-5239. 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. MIKHAIL O'DONNEL. ROBINSON Examiner Art Unit 1627 /MIKHAIL O'DONNEL ROBINSON/Examiner, Art Unit 1627 /Kortney L. Klinkel/Supervisory Patent Examiner, Art Unit 1627
Read full office action

Prosecution Timeline

Oct 06, 2023
Application Filed
Oct 20, 2025
Non-Final Rejection — §103, §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
57%
Grant Probability
99%
With Interview (+47.7%)
3y 6m
Median Time to Grant
Low
PTA Risk
Based on 103 resolved cases by this examiner. Grant probability derived from career allow rate.

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