Prosecution Insights
Last updated: October 04, 2026
Application No. 18/462,373

PYRIDOPYRIMIDINE-BASED COMPOUND AND APPLICATION THEREOF

Non-Final OA §102§112
Filed
Sep 06, 2023
Priority
Mar 08, 2021 — CN 202110251924.9 +1 more
Examiner
BORALSKY, LUKE ALAN
Art Unit
1624
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Shanghai Institute Of Organic Chemistry Chinese Academy Of Sciences
OA Round
3 (Non-Final)
67%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
4 granted / 6 resolved
+6.7% vs TC avg
Strong +44% interview lift
Without
With
+44.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
41 currently pending
Career history
49
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
23.1%
-16.9% vs TC avg
§102
11.5%
-28.5% vs TC avg
§112
34.6%
-5.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 6 resolved cases

Office Action

§102 §112
Some 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 . Application and Claims Status In the amendment as filed on 4/21/2026, applicants have amended claims 1, 18, 21, and 23-24; cancelled no claims; and added no new claims. Therefore, claims 1-3,5-8,10,15-21 and 23-24 are currently pending and claims 1-3,5-8,10,15-21 and 23-24 are presently under examination. Priority Acknowledgment is made of applicant's claim for foreign priority based on an application filed in China on 03/08/2021. It is noted, however, that applicant has not filed a certified copy of the 202110251924.9 application as required by 37 CFR 1.55. Claim Objections The objection to claims 1, 21 and 23-24 for not being written in the singular, alternative format is withdrawn based on the amendments. The objection to claim 23 because of improperly reciting “comprising administering” is withdrawn based on the amendments. Claim Rejections - 35 USC § 112(d) The rejection of claim 18 under 35 U.S.C. 112(d) is withdrawn based on the amendments. Specifically, Applicant has removed the compound in question. Claim Rejections - 35 USC § 102 The rejection of claims 1, 6-8, 16-17, and 21 under 35 U.S.C. 102(a)(1) as being anticipated by Booth is withdrawn based on amendments. Specifically, Applicant removed the term halogen from the definition of R5 to overcome the rejection. New Objections/Rejections Claim Objections Claims 1-3, 5-8, 10, 15-19, and 24 are objected to because of the following informality: the last two groups defined for each variable should have an “or” or “and” between them, so as to be consistent with proper Markush practice. So, in the limitation of E of claim 1, for example, the word “or” or “and” should appear between “C3-C12 cycloalkyl,” and “R6 substituted C3-C12 cycloalkyl;”. Again, in the limitation of R5 in claim 1, as another example, the word “or” or “and” should appear between “C1-C3 alkyl substituted C3-C12 cycloalkyl,” and “halogen substituted C3-C12 cycloalkyl;”. This informality is repeated throughout all claim limitations of claim 1, and further repeated, generally, in claims 2, 5-8, 10, 15-19, and 24. Appropriate correction is required. Claims 1, 2, 7, 10, and 15-17 are objected to because of the following informality: the word “and” should be between the last two variables defined, so as to be consistent with proper Markush practice. So, in claim 1, the word “and” should appear at the end of the limitation of B to bridge the limitations of B and R8. In claim 2, the word “and” should appear at the end of the limitation of R5 to bridge the limitations of R5 and R6. In claim 7, the word “and” should appear at the end of the limitation of Y to bridge the limitations of Y and Z. In claim 10, the word “and” should appear at the end of the limitation of B to bridge the limitations of B and R8. In claim 15, the word “and” should appear at the end of the limitation of A to bridge the limitations of A and B. In claim 16, the word “and” should appear at the end of the limitation of B to bridge the limitations of B and R8. In claim 17, the word “and” should appear at the end of the limitation of B to bridge the limitations of B and R8. Appropriate correction is required. Claim 19 is objected to for the following informality: there should be a comma separating all structures recited in the claim. Appropriate correction is required. Claims 1, 3, 5, 6, 10, 15, 18 are objected to because of the following informalities: the structures of said claims must be made by a process which will give them satisfactory reproduction characteristics. Every line, number, and letter must be durable, clean, black, sufficiently dense and dark, and uniformly thick and well-defined. The weight of all lines and letters must be heavy enough to permit adequate reproduction. In each of the recited claims, there are structures of non-uniform thickness that are not sufficiently dense and dark. For instance, in claim 1, L is recited as: PNG media_image1.png 74 342 media_image1.png Greyscale PNG media_image2.png 53 130 media_image2.png Greyscale . As another example, in claim 3, E is recited as: PNG media_image3.png 80 526 media_image3.png Greyscale and PNG media_image4.png 58 78 media_image4.png Greyscale and PNG media_image5.png 99 213 media_image5.png Greyscale . Appropriate correction is required. 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. Claims 1-3, 5-8, 10, 15-18, 20-21, and 23-24 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. Claims 1, 6, 7, 10, and 15-17 are rejected as vague and indefinite for its recitation, in various limitations of the cited claims, Applicant recites that some limitation (e.g. L, Y, Z, B) ”…is absent” throughout. If said variable is “absent”, then there would not be a variable at that position. Examiner recommends amending the claim to read, “[L, Y, Z, etc…] is a bond” if that is what Applicant intends. Claims 2-3, 5, 8, 18, 20-21, and 23-24 require and/or do not clarify the limitation at issue and are similarly rejected. Claims 1 and 10 are rejected as vague and ambiguous for recitation of the term “heterocycloalkyl ketone group”. As currently written, this could be C(O)-heterocycloalkyl (see definition of B in claim 1), which, based on the recited species in dependent claims, is likely not what the Applicant intends. Other variables are often recited as, for example, “R8 substituted 3-12 membered heterocycloalkyl” with the substituent listed in front of the group, so to be consistent with this formatting, Applicant could recite “ketone substituted heterocycloalkyl”. Claims 15 and 18 are rejected to as vague for the recitation of species in limitation A that have multiple substitutions (representative examples below). The claim language of independent claim 1 does not recite that multiple substitutions are allowed, and the specification (page 15) does not say that multiple substitutions are inherently allowed. Therefore, the claims are ambiguous since claim 1 reads as a single substitution. PNG media_image6.png 116 243 media_image6.png Greyscale Claim 21 is rejected as indefinite for the phrase “being prepared from” since this may convert any of the compounds in claim 1 to something else. Therefore, the metes and bounds are not known. 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. Claims 3 and 15 are 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 3 broadens the scope of claim 1, from which it depends. Claim 3 recites the following compounds: PNG media_image7.png 63 215 media_image7.png Greyscale Claim 1 recites that E is selected from “R6 substituted C3-C12 cycloalkyl” where R6 is “halogen substituted C1-C6 alkyl” but does not recite that E can be selected from R6 substituted 3-12 membered heterocycloalkyl. Thus, the above compounds are outside the scope of claim 1. Claim 15 broadens the scope of claim 1, from which it depends. In claim 15, in the limitation of B, Applicant recites multiple structures (page 11, bottom; page 12, bottom; page 13, top) of the following form, as examples, where: PNG media_image8.png 66 282 media_image8.png Greyscale Claim 1 recites that B is selected from, notably, “R8 substituted C3-C12 cycloalkyl”, “R8 substituted 3-12 membered heterocycloalkyl”, “C3-C12 cycloalkyl substituted amine group”, and “3-12 membered heterocycloalkyl substituted amine group”, where R8 can be “amino”. Examiner is unaware how these limitations in B allow for the species recited in limitation B. First, the specification does not provide any definitions for the terms “C3-C12 cycloalkyl substituted amine group”, and “3-12 membered heterocycloalkyl substituted amine group”. A POSITA would understand that “substituted” connotes any group that replaces a hydrogen off the parent group, and that the substituent is not a linking substituent (e.g. the point of attachment to the rest of the structure, as in the examples provided above). So, for instance, “C3-C12 cycloalkyl substituted amine group” and “3-12 membered heterocycloalkyl substituted amine group” would be represented by the following, where the substituted amino group does not play a role in linking to the rest of the claimed Markush structure: PNG media_image9.png 146 233 media_image9.png Greyscale PNG media_image10.png 165 256 media_image10.png Greyscale Thus, claim 15 broadens the scope of claim 1. 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. Conclusion Claims 1-3, 5-8, 10, 15-18, 20-21, and 23-24 are rejected. Claim 19 is objected. Any inquiry concerning this communication or earlier communications from the examiner should be directed to LUKE ALAN BORALSKY whose telephone number is (571)272-9746. The examiner can normally be reached Monday - Friday 7:30 am - 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 H 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. /L.A.B./Examiner, Art Unit 1624 /SUSANNA MOORE/Primary Examiner, Art Unit 1624
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Prosecution Timeline

Sep 06, 2023
Application Filed
Dec 17, 2025
Non-Final Rejection mailed — §102, §112
Mar 16, 2026
Response Filed
Apr 21, 2026
Non-Final Rejection mailed — §102, §112
Jul 01, 2026
Response Filed
Sep 16, 2026
Non-Final Rejection mailed — §102, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12741968
THERAPEUTIC AGENTS TARGETING GPR35
3y 8m to grant Granted Sep 22, 2026
Study what changed to get past this examiner. Based on 1 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
67%
Grant Probability
99%
With Interview (+44.4%)
3y 0m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 6 resolved cases by this examiner. Grant probability derived from career allowance rate.

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