Prosecution Insights
Last updated: August 06, 2026
Application No. 18/255,855

HETEROARYL-ACETYLENES, PHARMACEUTICAL COMPOSITIONS THEREOF, AND THEIR THERAPEUTIC APPLICATIONS

Final Rejection §102§103
Filed
Jun 02, 2023
Priority
Dec 04, 2020 — provisional 63/121,300 +1 more
Examiner
SHOWALTER, ALEXANDER KEITH
Art Unit
1629
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Eubulus Biotherapeutics Inc.
OA Round
2 (Final)
54%
Grant Probability
Moderate
3-4
OA Rounds
4m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allowance Rate
45 granted / 84 resolved
-6.4% vs TC avg
Strong +32% interview lift
Without
With
+32.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
26 currently pending
Career history
121
Total Applications
across all art units

Statute-Specific Performance

§101
3.3%
-36.7% vs TC avg
§103
34.8%
-5.2% vs TC avg
§102
15.7%
-24.3% vs TC avg
§112
30.7%
-9.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 84 resolved cases

Office Action

§102 §103
DETAILED NOTICE 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 . Priority The present Application, filed June 2, 2023, is a national stage entry under 35 USC § 371 of International Patent Application No. PCT/CN202l/135247, filed December 3, 2022, which claims the benefit of U.S. Provisional Patent Application No. 63/121,300, filed December 4, 2020. Status of the Claims In the amendment filed, claim 84 is canceled and new claim 128 is added. Claims 1 and 85 are amended. Claims 2-26, 29-47, 49-61, 70-76, 79-83, 88-115, and 120-127 were previously canceled. Claims 1, 27-28, 48, 62-69, 77-78, 85-87, 116-119, and 128 are currently pending. Response to Amendments/Arguments Claim Objections: The amendments to claims 4, 7, and 8 resolve the objections to these claims, and the objections to claims 4, 7, and 8 are withdrawn. Rejections for Indefiniteness: The amendment to claim 1 resolves the rejections of claims 1, 84-87, and 117-119 under 35 U.S.C. § 112(b) for indefiniteness, and these rejections are withdrawn. Rejections for Failure to Include All Limitations of the Base Claim: In its remarks of May 18, 2026, Applicant notes that Formula (IX) of claim 27 is properly a sub-genus of Formula III of claim 1, in particular where Y is a bond. The rejection erroneously overlooked the fact that Y can be a bond. In view of this, the rejections of claims 27 and 62-65 under 35 U.S.C. § 112(d), for alleged failure to incorporate all limitations of their base claim(s), are withdrawn. Rejections for Anticipation: The amendment to claim 1 overcomes the previous rejections of claim 1 and its dependent claims, 27-28, 62-63, 66-67, and 117-119 for anticipation under 35 U.S.C. § 102(a)(1). Claim Rejections - 35 USC § 102 – Modified in View of Amendment 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. Claims 1, 28, 117, and 128 are anticipated by Adam: Claims 1 and 28 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by U.S. Patent No. 8,227,613 to Adam et al. (hereinafter, “Adam”). Claim 1 recites a compound of Formula (XLII) or (III): PNG media_image1.png 71 273 media_image1.png Greyscale PNG media_image2.png 73 208 media_image2.png Greyscale where the variable groups are as defined. Adam teaches compounds, useful as antagonists of C-C motif chemokine receptors, having a formula (I) PNG media_image3.png 79 272 media_image3.png Greyscale where the variable groups are as defined (col. 1, line 60 through col. 4, line 15). In a working example, Adam teaches Example 24 PNG media_image4.png 120 262 media_image4.png Greyscale col. 59, lines 35-55), which is a compound of instant claim 1 (Formula III), where R1 is H; U is −N=; X, Y and Z are -C(R2a)= with R2a being methyl, H, and phenyl (C6 aryl), respectively, the phenyl being substituted with one substituent Q that is methyl (C1 alkyl) and the C1 alkyl being substituted with three substituents Qa that are fluorine (halo); R1 is H; A is −C(O)−; L1 is piperidinylene (heterocyclylene); L2 is pyrrolidinylene (heterocyclylene); and R3 is H. Claim 1 is therefore anticipated. With respect to claim 28, Example 24 of Adam is a compound of Formula (XII) with R1, A, L1, L2 and R3 as defined above; with U being −N=, Z being −C(H)−, and each R2a being hydrogen. With respect to claim 117, Adam teaches pharmaceutical compositions comprising a disclosed compound (e.g. Example 24) and a pharmaceutically acceptable excipient (col. 37, lines 33-35). With respect to claim 128, the group corresponding to instant R1 in Example 24 of Adam is H. Claims 1 and 27 are anticipated by Zhao: Claims 1 and 27 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by U.S. Patent Application Publication No. 2019/0263808 to Zhao et al. (hereinafter, “Zhao”). Zhao teaches antagonists of αv-containing integrins (Abstract) a generic formula I (not shown here). In a working example, Zhao teaches compound 152B, a synthesis intermediate. PNG media_image5.png 110 226 media_image5.png Greyscale Compound 152B is a compound of instant Formula (III) where R1 is methyl (C1 alkyl) substituted with a substituent Q that is ethyl (C2 alkyl) that is further substituted with a substituent Qa that is −ORa where Ra is H; U is −N=, X is −C(R2a)= where R2a is H, Y is a bond, and Z is −S−; A is −C(O)−; L1 is a bond; L2 is phenylene (arylene) that is further substituted with a substituent Q that is fluoro (halo); and R3 is −C(O)OR1a where R1a is methyl (C1 alkyl). Claim 27 recites a compound of Formula (IX) PNG media_image6.png 74 220 media_image6.png Greyscale where the variable groups are as defined. Zhao compound 152B is a compound of instant Formula (IX) where R1, R2a, A, L1, L2, and R3 are as described above in the mapping of compound 152B to Formula (III). Claim Rejections - 35 USC § 103 – Necessitated by Amendment The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 118-119 are unpatentable over Adam: Claims 118-119 are rejected under 35 U.S.C. 103 as being unpatentable over Adam. Claim 118 recites a method of treating a proliferative disease in a subject comprising administering to the subject in need thereof the compound of claim 1. Claim 119 recites a method of treating a disorder, disease, or condition mediated by a glutathione peroxidase 4 in a subject, having the same method step. Adam is applied to claims 118 and 119 as to claim 1, above. Adam further teaches that the disclosed compounds (e.g. Example 24) can be used for the treatment and/or prevention of a variety of diseases, such as restenosis (col. 37, lines 16-29). Restenosis is properly understood as a “proliferative disease.” See, for example, the non-patent publication, Vascular Smooth Muscle Cell Proliferation in Restenosis, Circulation: Cardiovascular Interventions, 4, pgs. 104-111 (2011) by Marx et al. It thus would have been at least obvious to administer a disclosed compound of Adam, such as Example 24, to a patient in need of treatment for a disease such as restenosis (a proliferative disease) in order to treat said proliferative disease. The same paragraph of Adam teaches that multiple sclerosis as one of the diseases to be treated by the disclosed compounds. Multiple sclerosis is reasonably regarded as a GPX4-mediated disease. See, for example, the non-patent publication, GPX4 aggravates experimental autoimmune encephalomyelitis by inhibiting the functions of CD4+ T cells, Biochem. Biophys. Res. Commun., 642, pgs. 57-65 (2023) by Li et al. (hereinafter, “Li”). Li teaches experimental autoimmune encephalomyelitis (EAE) is an animal model of multiple sclerosis, that GPX4 is highly expressed in CD4+ T cells of MS patients, and that conditional knockout of GPX4 in model mice significantly alleviated symptoms and immunopathology of EAE (Abstract). Li thus teaches a therapeutic strategy of targeting GPX4 in immune cells to treat MS. On the basis of the teachings of Adam, it would have been obvious to administer Adam Example 24 to a subject in need of treatment for multiple sclerosis (a GPX4-mediated disease), in order to treat multiple sclerosis. Claims 118 and 119 are thus obvious over Adam, given that restenosis and multiple sclerosis are a proliferative disease and a GPX4 mediated disease, respectively. Allowable Subject Matter Claims 48, 62-69, 77-78, and 85-87 are 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. Claim 116 is allowed. Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ALEXANDER K SHOWALTER whose telephone number is (571)270-0610. The examiner can normally be reached M-F 9:00 am to 5:00 pm, eastern time. 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 S Lundgren can be reached on (571) 272-5541. 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. /ALEXANDER K. SHOWALTER/Examiner, Art Unit 1629 /JEFFREY S LUNDGREN/Supervisory Patent Examiner, Art Unit 1629
Read full office action

Prosecution Timeline

Jun 02, 2023
Application Filed
Feb 19, 2026
Non-Final Rejection mailed — §102, §103
May 18, 2026
Response Filed
Jul 02, 2026
Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12691109
A BIFUNCTIONAL AGGREGATION-INDUCED EMISSION LUMINOGEN FOR MONITORING AND KILLING OF MULTIDRUG-RESISTANT BACTERIA
5y 6m to grant Granted Jul 28, 2026
Patent 12686699
CRYSTALLINE FORMS OF SQUALAMINE
3y 10m to grant Granted Jul 21, 2026
Patent 12678507
PROTEIN TYROSINE KINASE 6 (PTK6) DEGRADATION / DISRUPTION COMPOUNDS AND METHODS OF USE
5y 6m to grant Granted Jul 14, 2026
Patent 12637471
NOVEL HETEROCYCLIC COMPOUNDS, COMPOSITIONS, METHODS OF PREPARATION AND USES THEREOF
2y 6m to grant Granted May 26, 2026
Patent 12630552
INHIBITORS OF KRAS G12C
4y 1m to grant Granted May 19, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
54%
Grant Probability
86%
With Interview (+32.5%)
3y 7m (~4m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 84 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month