Prosecution Insights
Last updated: July 17, 2026
Application No. 18/263,442

CLASS OF HETEROAROMATIC COMPOUND, PREPARATION METHOD THEREFOR AND USE THEREOF

Non-Final OA §112
Filed
Jul 28, 2023
Priority
Jan 28, 2021 — CN 202110118008.8 +2 more
Examiner
ENGLISH, CONNOR KENNEDY
Art Unit
1625
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Innovstone Therapeutics Limited
OA Round
2 (Non-Final)
55%
Grant Probability
Moderate
2-3
OA Rounds
5m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 55% of resolved cases
55%
Career Allowance Rate
22 granted / 40 resolved
-5.0% vs TC avg
Strong +54% interview lift
Without
With
+54.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
37 currently pending
Career history
77
Total Applications
across all art units

Statute-Specific Performance

§101
2.3%
-37.7% vs TC avg
§103
53.4%
+13.4% vs TC avg
§102
4.5%
-35.5% vs TC avg
§112
18.0%
-22.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 40 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 . Current Status of 18/263,442 This Office Action is responsive to the amended claims and Applicant remarks of 05/06/2026. Claims 27-29, 32-33, 52-54, and 56-59 are pending and have been examined on the merits. Priority The instant application is a national stage entry of PCT/CN2022/074172, international filing date 01/27/2022, which claims priority to Chinese Patent application No. 202110118008.8, filed 01/28/2021, and Chinese Patent application No. 202111457630.8, filed 12/01/2021. Response to Arguments 112(b) Rejections: Applicants have amended claims 28, 29, and 31-34 to remove indefinite phrases. These amendments render the previous rejections moot. The rejection is withdrawn. 101 Rejections: Applicants have amended claims 54 and 55 so that they fall within one of the statutory categories of invention. These amendments render the previous rejection moot and the rejection is withdrawn. 102 Rejections: Applicants allege that the compounds of instant claim 27 are distinguishable from the compounds of Graupe, Isobe, and Dellaria for several reasons. First, the substituent on the carbon atom of the imidazole ring is required to be sulfur in the amended claims, whereas the compounds of Graupe and Dellaria require either a hydroxyl or carbonyl group at this position. The amended instant compound now requires a tricyclic core. None of the cited references used in the rejections suggest a tricyclic system. Regarding the rejection of the species of reference Valiante, Applicants allege that the instantly claimed compounds differ from those of the reference due to the requirement that the instant compounds must contain and cyclic moiety or a tertiary amine bound to the nitrogen atom of the imidazole ring. These arguments have been considered and are found persuasive. The rejections are withdrawn. 103 Rejections: Applicants allege that the compounds of amended claim 27 differ from those of Graupe and Gekeler. The differences between the instantly claimed compounds and Graupe are discussed above. Applicants allege that the amended compound of claim 27 differ from those of Gekeler due to the carbon atom of the imidazole ring is not taught as being -S-R as claimed by the instant compound. Additionally, the moiety attached to the nitrogen atom of the imidazole ring does not include a cyclic moiety, as required by the amended compound. These arguments have been fully considered and are found persuasive. The rejection is withdrawn. Information Disclosure Statement The information disclosure statement (IDS) submitted on 04/29/2026 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Claim Objections Claims 27 and 54 objected to because of the following informalities: Claim 27 recites “B is selected from chemical bond.” This should be corrected to read “a chemical bond.” Claim 54 recites “A method for treat a disease.” This should be corrected to read “A method for treating a disease.” Appropriate correction is required. 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 29, 32, 33, 53, and 56-59 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. Each of the indicated claims recite “The compound, and the stereoisomer, the optical isomer, the pharmaceutically acceptable salt, and the solvate thereof according to claim 27.” As written, it is uncertain whether the dependent claims requires all the listed forms or recites alternatives. Accordingly, the metes and bounds of the claims are not clearly defined. The Examiner suggests replacing “and” with “or” after “compound” to clarify that the recited compound forms are alternatives, rather than cumulative required forms. Claims 32 and 59 recite the limitation "the prodrug" in line two of the claims. There is insufficient antecedent basis for this limitation in the claims. Claims 56 and 57 recite the limitation "RA" in the third lines of the claims. There is insufficient antecedent basis for this limitation in the claim. This rejection can be rendered moot by correcting “RA” to “RA.” Conclusion Claim 27 is objected to for informalities and is not in condition for allowance. The remaining claims are rejected under 35 U.S.C. §112(b) and/or objected to. Accordingly, no claims are allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to CONNOR KENNEDY ENGLISH whose telephone number is (571)270-0813. The examiner can normally be reached Monday Friday, 8 a.m. 5 p.m. ET.. 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, Andrew Kosar can be reached at (571)272-0913. 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. /C.K.E./Examiner, Art Unit 1625 /Andrew D Kosar/Supervisory Patent Examiner, Art Unit 1625
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Prosecution Timeline

Jul 28, 2023
Application Filed
Feb 10, 2026
Non-Final Rejection mailed — §112
May 06, 2026
Response Filed
Jun 24, 2026
Non-Final Rejection mailed — §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

2-3
Expected OA Rounds
55%
Grant Probability
99%
With Interview (+54.5%)
3y 5m (~5m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 40 resolved cases by this examiner. Grant probability derived from career allowance rate.

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