Prosecution Insights
Last updated: October 02, 2026
Application No. 18/844,371

PYRIDO[1,2-A]PYRIMIDIN-4-ONE DERIVATIVES

Non-Final OA §112
Filed
Sep 05, 2024
Priority
Mar 10, 2022 — EU 22161258.3 +1 more
Examiner
FERGUSON, JALISA HOLMES
Art Unit
Tech Center
Assignee
Hoffmann-La Roche Inc.
OA Round
1 (Non-Final)
61%
Grant Probability
Moderate
1-2
OA Rounds
1y 2m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allowance Rate
22 granted / 36 resolved
+1.1% vs TC avg
Strong +44% interview lift
Without
With
+43.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
27 currently pending
Career history
58
Total Applications
across all art units

Statute-Specific Performance

§101
1.5%
-38.5% vs TC avg
§103
17.0%
-23.0% vs TC avg
§102
22.0%
-18.0% vs TC avg
§112
36.5%
-3.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 36 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 . Status of the Claims Claims 1-12, 14 and 18 are pending. Claims 11-12 are rejected. Claims 2-10 are objected to. Claims 1, 14 and 18 are allowable. Priority This application is a 35 U.S.C. 371 National Stage Filing of International Application No. PCT/EP2023/055838 filed 03/08/2023, which claims priority under 35 U.S.C. 119(a-d) to EP 22161258.3, filed 03/10/2022. Receipt is acknowledged of papers submitted under 35 U.S.C. 119(a)-(d), which papers have been placed of record in the file. Information Disclosure Statement The information disclosure statement(s) (IDS) dated 06/24/2026 has been considered. Claim Objections Claims 2-10 and 12 are objected to because of the following informalities: The claims refer to claim 1 which recites “A compound of Formula (I)”. Accordingly, the dependent claims should be amended as follows: “[[A]]The compound according to claim 1,…”. 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. Claim 11 is rejected under 35 U.S.C. 112(b) being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. Claim 11 recites the limitation "wherein n is 0 or 1" in the first two lines of the paragraph after Formula B2. However, there is insufficient antecedent basis for this limitation in the claim since there is no structure that uses a variable “n”. Applicant may amend the claim to delete the limitation. 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. Claim 12 is rejected under 35 U.S.C. 112(d) 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 12 is in improper form because a multiple dependent claim should refer to other claims in the alternative only. See MPEP § 608.01(n). Applicant may amend the claim such that it depends only from one claim. Allowable Subject Matter Claims 1-12, 14 and 18 are free of the prior art. The closest prior art is from Bhattacharyya et al. in WO 2019/005980 and Reynolds et al. in WO 2021/207550, both of which are cited in the IDS dated 06/24/2026. Reynolds et al. in ‘550 teach compounds of formula (I), PNG media_image1.png 111 236 media_image1.png Greyscale , that may be used to treat Huntington’s disease among other diseases and conditions as indicated in claims 75 and 80 on pages 292-293. Compounds 211 and 212 on page 84 for instance, PNG media_image2.png 250 458 media_image2.png Greyscale , are nearly embraced by instant formula (I) of claim 1, PNG media_image3.png 156 299 media_image3.png Greyscale , wherein A1 is N, A2 is N, R2 is C1 alkyl, and R3 is C1 alkyl. The prior art compounds differ at least in that the azaspiro ring has an additional nitrogen atom present, and the PNG media_image4.png 108 86 media_image4.png Greyscale fused bicyclic of the instant claims is instead a PNG media_image5.png 103 110 media_image5.png Greyscale bicyclic. The prior art compounds are therefore novel. Additionally, there is no suggestion or teaching that would motivate a person having ordinary skill in the art to modify the compounds in such a way as to identify the presently claimed compounds nor any process of preparing or using said compounds. Therefore, the instant claims are both novel and nonobvious. Bhattacharyya et al. in ‘980 teaches compounds of Formula (I) PNG media_image6.png 150 137 media_image6.png Greyscale for treating or ameliorating Huntington’s disease. See abstract and last paragraph of page 1. Compound 641, PNG media_image7.png 131 178 media_image7.png Greyscale , on page 101 for instance is nearly embraced by instant formula (I) of claim 1, PNG media_image3.png 156 299 media_image3.png Greyscale , wherein A1 is N, A2 is N, and R2 is H. The prior art compounds differ at least in that there is no azaspiro ring in the prior art compounds and the 9-membered fused heterocycle has a different attachment point. The prior art compounds are therefore novel. Additionally, there is no suggestion or teaching that would motivate a person having ordinary skill in the art to modify the compounds in such a way as to identify the presently claimed compounds nor any process of preparing or using said compounds. Therefore, the instant claims are both novel and nonobvious. Contact Information Claims 11-12 are rejected. Claims 1-10, 14 and 18 are allowable. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Jalisa H. Ferguson whose telephone number is (703)756-1489. The examiner can normally be reached Monday - Friday 9:00am - 5:00pm. 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, Amy L. Clark can be reached on (571) 272-1310. 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. /J.H.F./Examiner, Art Unit 1626 /REBECCA L ANDERSON/Primary Examiner, Art Unit 1626
Read full office action

Prosecution Timeline

Sep 05, 2024
Application Filed
Aug 11, 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

1-2
Expected OA Rounds
61%
Grant Probability
99%
With Interview (+43.8%)
3y 3m (~1y 2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 36 resolved cases by this examiner. Grant probability derived from career allowance rate.

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