Prosecution Insights
Last updated: July 17, 2026
Application No. 18/770,569

APPLICATION OF IMIDAZO [1,2-A] PYRAZINE COMPOUNDS OR THEIR PHARMACEUTICALLY ACCEPTABLE SALTS IN THE PREPARATION OF ANTI-CORONAVIRUS DRUGS

Non-Final OA §101§102§112
Filed
Jul 11, 2024
Priority
Jul 14, 2023 — CN 202310867035.4
Examiner
COUGHLIN, MATTHEW P
Art Unit
Tech Center
Assignee
Guangzhou Medical University
OA Round
1 (Non-Final)
71%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
83%
With Interview

Examiner Intelligence

Grants 71% — above average
71%
Career Allowance Rate
708 granted / 992 resolved
+11.4% vs TC avg
Moderate +12% lift
Without
With
+11.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
45 currently pending
Career history
1038
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
35.7%
-4.3% vs TC avg
§102
18.0%
-22.0% vs TC avg
§112
14.8%
-25.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 992 resolved cases

Office Action

§101 §102 §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 Claim 1 is pending in the application. Claim 1 is rejected. Priority This application claims priority under 35 U.S.C. 119(a-d) to CN202310867035.4, filed July 14th, 2023. Applicant has not filed a certified copy of the foreign priority application as required by 35 U.S.C. 119(b). Information Disclosure Statement The Examiner has considered the Information Disclosure Statement(s) filed on July 11th, 2024. Specification The disclosure is objected to because of the following informalities: The structures on page 2 of the specification should be replaced with higher resolution versions. Appropriate correction is required. Claim Objections The structures in claim 1 should be replaced with higher resolution versions. Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claim 1 is rejected under 35 U.S.C. 101 because the claimed invention is directed to non-statutory subject matter. The claim(s) does/do not fall within at least one of the four categories of patent eligible subject matter because the claims are directed to an “application” which appears to be tantamount to a “use”. Applicant is directed to MPEP 2173.05(q) which states: ‘"Use" claims that do not purport to claim a process, machine, manufacture, or composition of matter fail to comply with 35 U.S.C. 101. In re Moreton, 288 F.2d 708, 709, 129 USPQ 227, 228 (CCPA 1961)("one cannot claim a new use per se, because it is not among the categories of patentable inventions specified in 35 U.S.C. § 101 ").’ In this situation, the claim does not set forth any actual method steps only recites how a compound can be used. 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. Claim 1 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 1 is directed to an “application” where the claim does not set forth active method steps. It is therefore unclear what minimal manipulations, if any, are required to meet the limitation of the “application”. MPEP 2173.05(q) states: ‘Attempts to claim a process without setting forth any steps involved in the process generally raises an issue of indefiniteness under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph.’ Claim Rejections - 35 USC § 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)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. (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. (1 of 5) Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 1189997-80-5, which entered STN on October 25th, 2009. Registry No. 1189997-80-5 is drawn to the first compound of instant claim 1. Claim 1 is rejected as indefinite as being directed to an “application” and the claim only appears to require the existence of the compound rather than any specific manipulations or method steps. (2 of 5) Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 1285941-53-8, which entered STN on April 26th, 2011. Registry No. 1285941-53-8 is drawn to the second compound of instant claim 1. Claim 1 is rejected as indefinite as being directed to an “application” and the claim only appears to require the existence of the compound rather than any specific manipulations or method steps. (3 of 5) Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 1286638-16-1, which entered STN on April 27th, 2011. Registry No. 1286638-16-1 is drawn to the third compound of instant claim 1. Claim 1 is rejected as indefinite as being directed to an “application” and the claim only appears to require the existence of the compound rather than any specific manipulations or method steps. (4 of 5) Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by CN 116785292 A by Yu et al., which was published September 22nd, 2023 and names Hayashi Isahiro as an inventor who is not named as an inventor on the instant application. Applicant cannot rely upon the certified copy of the foreign priority application to overcome this rejection because a translation of said application has not been made of record in accordance with 37 CFR 1.55. When an English language translation of a non-English language foreign application is required, the translation must be that of the certified copy (of the foreign application as filed) submitted together with a statement that the translation of the certified copy is accurate. See MPEP §§ 215 and 216. The prior art teaches the first compound of instant claim 1 on page 36 (compound P19453), the second compound of instant claim 1 on page 52 (compound P22445) and the third compound of instant claim 1 on page 59 (compound P22475). Claim 1 is rejected as indefinite as being directed to an “application” and the claim only appears to require the existence of the compound rather than any specific manipulations or method steps. Regardless, the prior art teaches application in SARS-CoV-2 in the machine translation. See page 83 of 90 of the attached document. (5 of 5) Claim(s) 1 is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by WO 2025/015645 A1, which was filed August 7th, 2023 and names Yonghao Lin as an inventor who is not recited as an inventor on the instant application. The applied reference has a common inventor with the instant application. Based upon the earlier effectively filed date of the reference, it constitutes prior art under 35 U.S.C. 102(a)(2). This rejection under 35 U.S.C. 102(a)(2) might be overcome by: (1) a showing under 37 CFR 1.130(a) that the subject matter disclosed in the reference was obtained directly or indirectly from the inventor or a joint inventor of this application and is thus not prior art in accordance with 35 U.S.C. 102(b)(2)(A); (2) a showing under 37 CFR 1.130(b) of a prior public disclosure under 35 U.S.C. 102(b)(2)(B) if the same invention is not being claimed; or (3) a statement pursuant to 35 U.S.C. 102(b)(2)(C) establishing that, not later than the effective filing date of the claimed invention, the subject matter disclosed in the reference and the claimed invention were either owned by the same person or subject to an obligation of assignment to the same person or subject to a joint research agreement. The prior art teaches the first compound of instant claim 1 on page 15 (compound P19453), the second compound of instant claim 1 on page 31 (compound P22445) and the third compound of instant claim 1 on page 38 (compound P22475). Claim 1 is rejected as indefinite as being directed to an “application” and the claim only appears to require the existence of the compound rather than any specific manipulations or method steps. Regardless, the prior art teaches application in SARS-CoV-2 in the machine translation. See page 100 of 116 of the attached document. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MATTHEW P COUGHLIN whose telephone number is (571)270-1311. The examiner can normally be reached Monday - Friday, 10 am - 6 pm EST. 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, Renee Claytor can be reached at 571-272-8394. 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. /MATTHEW P COUGHLIN/Primary Examiner, Art Unit 1626
Read full office action

Prosecution Timeline

Jul 11, 2024
Application Filed
Jun 10, 2026
Non-Final Rejection mailed — §101, §102, §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
71%
Grant Probability
83%
With Interview (+11.9%)
2y 5m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 992 resolved cases by this examiner. Grant probability derived from career allowance rate.

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