Prosecution Insights
Last updated: April 19, 2026
Application No. 18/263,870

FUSED TRICYCLIC CYCLIN-DEPENDENT KINASE INHIBITOR, AND PREPARATION METHOD THEREFOR AND PHARMACEUTICAL USE THEREOF

Non-Final OA §112
Filed
Aug 01, 2023
Examiner
HABTE, KAHSAY
Art Unit
1624
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Jiangsu Hengrui Pharmaceuticals Co. Ltd.
OA Round
1 (Non-Final)
85%
Grant Probability
Favorable
1-2
OA Rounds
1y 11m
To Grant
93%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allow Rate
1348 granted / 1589 resolved
+24.8% vs TC avg
Moderate +8% lift
Without
With
+8.1%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 11m
Avg Prosecution
45 currently pending
Career history
1634
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
6.9%
-33.1% vs TC avg
§102
18.9%
-21.1% vs TC avg
§112
47.0%
+7.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1589 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 . Claims 1-22 are pending in this application. Election/Restrictions Applicant’s election without traverse of Group I in the reply filed on 01/30/2026 is acknowledged. After further review of the case, it is deemed necessary to withdraw the Restriction Requirement dated 12/03/2025. 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 2-3, 7-10, 15, 17 and 20 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: a. Regarding claims 2-3, 7-10, 15, and 17, the phrase "most preferably", ”particularly preferably” or “preferably” 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). b. In claim 17, the phrase “an isotopically substituted form of the compound” is not clear. What atoms except H are isotopically substituted and what are not? Are the isotopically substituted form embrace different isotopes of carbon? Different isotopes of N? If so, what does the substituted form looks like? It is recommended that applicants delete said claim. c. In claim 20, the phrase “treating a cyclin-dependent kinase-associated disease” is indefinite. What is covered and what is not? Who is in need thereof? How can one tell if a given disease is not a cyclin-dependent kinase-associated disease? In order to overcome this rejection, the examiner recommends that applicants recite specific diseases as it was done in claim 21 or delete said claim. Information Disclosure Statement 5. Applicant’s Information Disclosure Statement, filed on 01/30/2026, 03/14/2025, 12/01/2023, and 08/01/2023 has been acknowledged. Please refer to Applicant’s copies of the 1449 submitted herewith. Allowable Subject Matter 6. Claims 1, 4, 6, 11-14, 18-19 and 21-22 are allowed. Claim Objections 7. Claim 16 is objected to because of the following informalities: Most of the chemical structures in claim 16 contain faded bonds. The chemical structure of formula I in claim 1 as shown below is legible, but most of the compounds in claim 16 are not. PNG media_image1.png 178 314 media_image1.png Greyscale It is recommended that applicants redraw the compounds with faded bonds so that the chemical structures are legible. Appropriate correction is required. Objection 8. Claim 5 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion 9. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Kahsay Habte Ph.D. whose telephone number is (571)272-0667. The examiner can normally be reached on 8:30 - 5:00 PM. 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 on 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 an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see https://ppair-my.uspto.gov/pair/PrivatePair. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /Kahsay Habte/ Primary Examiner, Art Unit 1624
Read full office action

Prosecution Timeline

Aug 01, 2023
Application Filed
Feb 24, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
85%
Grant Probability
93%
With Interview (+8.1%)
1y 11m
Median Time to Grant
Low
PTA Risk
Based on 1589 resolved cases by this examiner. Grant probability derived from career allow rate.

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