Prosecution Insights
Last updated: July 17, 2026
Application No. 18/453,156

CDK2 DEGRADERS AND USES THEREOF

Non-Final OA §112
Filed
Aug 21, 2023
Priority
Aug 19, 2022 — provisional 63/373,018 +3 more
Examiner
GONZALEZ, LUISALBERTO
Art Unit
1624
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Kymera Therapeutics Inc.
OA Round
1 (Non-Final)
60%
Grant Probability
Moderate
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allowance Rate
85 granted / 142 resolved
At TC average
Strong +47% interview lift
Without
With
+47.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
56 currently pending
Career history
204
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
47.9%
+7.9% vs TC avg
§102
5.5%
-34.5% vs TC avg
§112
20.4%
-19.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 142 resolved cases

Office Action

§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 . Detailed Action Filing Receipt The filing receipt mailed 01/04/2024 states the that instant application claims benefit of provisional applications 63/373,018 filed 08/19/2022, 63/380,914 filed 04/03/2022, 63/493,926 filed 04/03/2023, and 63/522,640 filed 06/22/2023. The provisional applications support the instant claims. Therefore, the effective filing date is 08/19/2022. Information Disclosure Statement The information disclosure statements received 06/26/2025, 09/16/2025, and 02/27/2026 have been considered. Applicant’s assertion of IDS size fee is acknowledged. Species Election Applications election of the following groups and species is been acknowledged. Applicant has elected Group II, claims 2-18. Applicant has further elected the following compounds and moieties. PNG media_image1.png 154 460 media_image1.png Greyscale PNG media_image2.png 132 396 media_image2.png Greyscale At examiner’s discretion, search and examination has been expanded to include the following moieties: PNG media_image3.png 160 242 media_image3.png Greyscale and PNG media_image4.png 150 234 media_image4.png Greyscale Where R1 = C, N, R2 = N, O, and R3 = C, S, P. Claims 9-14 are hereby withdrawn from consideration being drawn to non-elected species. Objections Specification The specification is objected to because the following figures are illegible: Figure I-c-5 on p. 103. PNG media_image5.png 504 678 media_image5.png Greyscale Similar Issues are in figure I-c-3 (p. 102) and I-c-10 (p. 104). Examiner requests applicant review the specification as the specification has not been completely reviewed for all minor informalities. Trademark The use trade names and trademarks used in commerce, has been noted in this application. Although the use of trade names and marks used in commerce (i.e., trademarks, service marks, certification marks, and collective marks) are permissible in patent applications, the proprietary nature of the marks should be respected and every effort made to prevent their use in any manner which might adversely affect their validity as commercial marks. Rejections Claim Rejections - 35 USC § 112(a) The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 2-8, 15, and 17-18 rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 2 claims a compound of structure I-b’, shown below. PNG media_image6.png 142 488 media_image6.png Greyscale Claim 3 claims a compound wherein the DIM ring is a any of a cereblon E3 ubiquitin ligase binding moiety, VHL E3 ubiquitin binding moiety, IAP E3 ubiquitin ligase binding moiety, and MDM2 E3 binding moiety. Claims 4-7 are drawn to compounds wherein DIM E3 ubiquitin ligase binding moiety and that the compound has a structure of I-nn-1, shown below. Claims 5-7 specify compounds of structures shown below. PNG media_image7.png 154 614 media_image7.png Greyscale PNG media_image8.png 172 602 media_image8.png Greyscale PNG media_image9.png 162 610 media_image9.png Greyscale Claim 6 is drawn to compounds of formulas I-b-1 through I-b-9. See claim for structures. Claims 4-7 all contain the following structural motifs: PNG media_image10.png 56 84 media_image10.png Greyscale , PNG media_image11.png 74 102 media_image11.png Greyscale . The instant specification does not disclose any compounds having a structural moiety shown immediately above. Most, if not all, compounds disclosed within the specification have a moiety shown below. PNG media_image12.png 116 118 media_image12.png Greyscale Further, claim 5 specifies the following: PNG media_image13.png 416 624 media_image13.png Greyscale . Of these ring A systems, the instant specification, in Table (starting p. 495), discloses the following: PNG media_image14.png 106 160 media_image14.png Greyscale , PNG media_image15.png 174 282 media_image15.png Greyscale , PNG media_image16.png 186 212 media_image16.png Greyscale PNG media_image17.png 196 304 media_image17.png Greyscale [Some ring A structures have been omitted for brevity]. Therefore, only a small amount of the ring A systems claimed have been disclosed in the working examples. Similarly, in claim 7, applicant claims X4, of Ring M (included below), is a trivalent moieties of the following structures: PNG media_image18.png 116 602 media_image18.png Greyscale . PNG media_image19.png 204 598 media_image19.png Greyscale No compounds within the specification disclose trivalent Si, P=O and no compounds disclosed have an R7 as claimed. The same claim also states “each of X1, X6, and X7 is independently a bivalent moiety selected from a covalent bond, -CH2-, -CHCF3, -SO2-, -S(O)-, P(O)R-…”. Full claim language omitted for brevity. Claim 8 also claims structures which applicant has not shown full possession, specifically I-b-10 below. PNG media_image20.png 118 484 media_image20.png Greyscale Regarding claim 15 and the limitation L within the claims, claims 2 and 15 state: PNG media_image21.png 290 610 media_image21.png Greyscale and PNG media_image22.png 132 614 media_image22.png Greyscale . The instant specification is does not disclose any compounds wherein L is SiR2, Si(OH)R-, -P(O)OR-, etc. Additionally, no compounds disclosed contain an alkyl chain of length anywhere near 50 carbons. Considering the above, the full scope of the claims is contemplative at best. In view of the disclosed compounds in table 1 (p. 495-725), applicant has not shown possession of the claims to the full scope of the claims. Considering the significant differences between what has been disclosed and what is contemplated, one of ordinary skill in the art would not reasonably infer that applicant has full possession of the claims as they are currently written. Dependent claims 17 and 18 are also rejected. 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. Reference to Table or Figure in Claims Claim 16 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 16 states “The compound of claim 3, wherein said compound is selected from any one of the compounds depicted in Table 1 or a pharmaceutically acceptable salt thereof.” The MPEP section 2173.05(s) states: 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) (citations omitted). Relative Term Regarding claim 2, the phrase "such as" renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). Claim 2 states “DIM is a degradation inducing moiety, such as a ligase binding moiety…”. Claim Rejections - 35 USC § 112(d) 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. Claim 16 is 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. Claim 16 states “The compound of claim 3 wherein said compound is selected from any one of the compounds depicted in Table 1, or a pharmaceutically acceptable salt thereof.” Table 1 includes compounds wherein rings W and X are fused together. Example shown below. PNG media_image23.png 250 1062 media_image23.png Greyscale . Independent claim 2 requires an Ly between the two rings. At minimum, the W ring system is required to be separated from the X ring system and the two cannot be fused. Therefore, claim 16 is broader than it’s parent claim. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Pertinent Art Not Cited Wang (Nature Chemical Biology, 17, 567-575, 2021, of the record) discloses similar compounds to the elected species. Wang in Fig. 1d discloses the following: PNG media_image24.png 188 782 media_image24.png Greyscale . Conclusion No claims allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to LUISALBERTO GONZALEZ whose telephone number is (571)272-1154. The examiner can normally be reached M-F 8:30-5:30. 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, Jeffrey Murray can be reached at (571) 272-9023. 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. /LUISALBERTO GONZALEZ/Examiner, Art Unit 1624
Read full office action

Prosecution Timeline

Aug 21, 2023
Application Filed
May 14, 2026
Non-Final Rejection mailed — §112 (current)

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Prosecution Projections

1-2
Expected OA Rounds
60%
Grant Probability
99%
With Interview (+47.1%)
2y 10m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 142 resolved cases by this examiner. Grant probability derived from career allowance rate.

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