Prosecution Insights
Last updated: October 02, 2026
Application No. 18/687,804

INHIBITOR OF PROSTATE SPECIFIC MEMBRANE ANTIGEN AND PHARMACEUTICAL USE THEREOF

Non-Final OA §112
Filed
Feb 28, 2024
Priority
Sep 01, 2021 — CN 202111018447.8 +3 more
Examiner
SAMALA, JAGADISHWAR RAO
Art Unit
Tech Center
Assignee
Jiangsu Hengrui Pharmaceuticals Co. Ltd.
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
7m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
541 granted / 796 resolved
+8.0% vs TC avg
Strong +56% interview lift
Without
With
+55.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
29 currently pending
Career history
814
Total Applications
across all art units

Statute-Specific Performance

§101
1.5%
-38.5% vs TC avg
§103
49.4%
+9.4% vs TC avg
§102
17.6%
-22.4% vs TC avg
§112
15.7%
-24.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 796 resolved cases

Office Action

§112
DETAILED ACTION Notice of Pre-AIA or AIA Status This Office action details a first action on the merits for the above reference application No. Claims 1-17, 20 and 24-28 are pending in this application. The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Information Disclosure Statement The information disclosure statement (IDS) submitted on 02/28/2024 was noted and the submission is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Drawings The drawings were received on 02/28/2024. These drawings are acknowledged. 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 1-11, 13, 14, 24, and 27 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. The claims are indefinite due the almost unlimited number of distinct alternative compounds encompassed by the various variations in the claimed formula. For example, if a claim defines a chemical compound using one or more Markush groups, and that claim encompasses a massive number of distinct alternative members, the claim may be indefinite under 35 U.S.C. 112(b) if one skilled in the art cannot determine its metes and bounds due to an inability to envision all of the compounds defined by the Markush group(s). In such a circumstance, a rejection of the claim for indefiniteness under 35 U.S.C. 112(b) is appropriate. See MPEP 2173.05(h) Alternative Limitations [R-01.2024]. Improper Markush Rejection Claims 1-11, 13, 14, 24, and 27 are rejected on the basis that it contains an improper Markush grouping of alternatives. See In re Harnisch, 631 F.2d 716, 721-22 (CCP1980) and Ex parte Hozumi, 3 USPQ2d 1059, 1060 (Bd. Pat. App. & Int. 1984). A Markush grouping is proper if the alternatives defined by the Markush group (i.e., alternatives from which a selection is to be made in the context of a combination or process, or alternative chemical compounds as a whole) share a "single structural similarity" and a common use. A Markush grouping meets these requirements in two situations. First, a Markush grouping is proper if the alternatives are all members of the same recognized physical or chemical class or the same art-recognized class and are disclosed in the specification or known in the art to be functionally equivalent and have a common use. Second, where a Markush grouping describes alternative chemical compounds, whether by words or chemical formulas, and the alternatives do not belong to a recognized class as set forth above, the members of the Markush grouping may be considered to share a "single structural similarity" and common use where the alternatives share both a substantial structural features and a common use that flows from the substantial structural feature. See MPEP § 2117. The Markush grouping of the components of the formulation is improper because the alternatives defined by the Markush grouping do not share both a single structural similarity and a common use for the following reasons: The claims are directed to a compound of formula (IV) or a pharmaceutically acceptable salt thereof, PNG media_image1.png 264 347 media_image1.png Greyscale . The compound formula (IV) encompass various substituents including, but not limited to the following: T= -NR4(CO)-, -NR4(SO2)-, and NR4(CH2)-, R4 is selected from the group consisting of H, C₁-₆ alkyl, 6-10 membered aryl, and 5-12 membered heteroaryl; the C₁-₆ alkyl, 6-10 membered aryl, or 5-12 membered heteroaryl is optionally substituted with one or more substituents P; A= PNG media_image2.png 71 93 media_image2.png Greyscale PNG media_image3.png 76 117 media_image3.png Greyscale PNG media_image4.png 95 455 media_image4.png Greyscale PNG media_image5.png 92 271 media_image5.png Greyscale PNG media_image6.png 108 125 media_image6.png Greyscale W is selected from the group consisting of 6-10 membered aryl and 5-12 membered heteroaryl; the 5-10 membered aryl or 5-12 membered heteroaryl is optionally substituted with one or more substituents P or is unsubstituted; the substituents P are selected from the group consisting of C₁-C₆ alkyl, halogen, deuterium, hydroxy, sulfhydryl, -NRR, oxo, thio, -C(O)Rₖ, -C(O)ORk, -S(O)Rk, -S(O)ORk, -S(O)(O)Rk, -S(O)(O)ORk, -C(S)Rk, nitro, cyano, C₁-C₆ alkoxy, C₁-C₆ alkylthioether group, C2-C₆ alkenyl, C2-C₆ alkynyl, 3- to 10-membered cycloalkyl, 3- to 10-membered heterocyclyl, 6- to 10-membered aryl, 5- to 10-membered heteroaryl, 8- to 12-membered fused cycloaryl, and 5- to 12-membered fused heteroaryl; Ri and Rj are each independently selected from the group consisting of a hydrogen atom, hydroxy, C₁-C₆ alkyl, and C₁-C₆ alkoxy; Rk is independently selected from the group consisting of a hydrogen atom, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₁-C₆ alkoxy, hydroxy, and -NRR,, wherein the alkyl, alkoxy, or haloalkyl is optionally substituted with one or more substituents selected from the group consisting of C₁-C₆ alkyl, halogen, hydrogen, sulfhydryl, -NR|R₁, oxo, thio, carboxyl, nitro, cyano, C₁-C₆ alkoxy, C₁-C₆ alkylthioether group, C₂-C₆ alkenyl, C₂-C₆ alkynyl, 3- to 10-membered cycloalkyl, 3- to 10-membered heterocyclyl, 6- to 10-membered aryl, and 5- to 10-membered heteroaryl; and R3 is a chelating agent selected from group consisting of: PNG media_image7.png 619 680 media_image7.png Greyscale . It is duly noted that the above do not contain a common core but comprise a wide variety of structures, rings, variable repeating units and functional groups. Thus, there is no common core consistent with the structures above since the claims embrace species from various chemical classes. Applicant attention is directed to the third paragraph of MPEP 803.02 which discloses: "Since the decisions in In re Weber, 580 F.2d 455, 198 USPQ 328 (CCPA 1978) and In re Haas, 580 F.2d 461, 198 USPQ 334 (CCPA 1978), it is improper for the Office to refuse to examine that which Applicants regard as their invention, unless the subject matter in a claim lacks unity of invention. In re Harnisch, 631 F.2d 716, 206 USPQ 300 (CCPA 1980); and Ex parte Hozumi, 3 USPQ2d 1059 (Bd. Pat. App.& Int. 1984). Broadly, unity of invention exists where compounds included within a Markush group (1) share a common utility, and (2) share a substantial structural feature essential to that utility." In the instant case, if it is asserted that the claims share a common utility, namely they are used in the formulation of independent claim 1, the genus does not share a substantial structural feature essential to the utility which is a feature that is essential to the activity/function of the claimed species. The only component that is probably consistent in the above individual groups is a carbon-carbon bond. As a result, such a grouping would be repugnant to scientific classification because the carbon-carbon bond alone is not responsible for the utility of the entire molecule. In addition, the wide variety of rings, structures and functional groups does not allow the genus to have an art recognized classification. Hence, the Markush grouping is improper. In response to this rejection, Applicant should either amend the claim(s) to recite only individual species or grouping of species that share a substantial structural feature as well as a common use that flows from the substantial structural feature, or present a sufficient showing that the species recited in the alternative of the claims(s) in fact share a substantial structural feature as well as a common use that flows from the substantial structural feature. This is a rejection on the merits and may be appealed to the Board of Patent Appeals and Interferences in accordance with 35 U.S.C. §134 and 37 CFR 41.31(a)(1) (emphasis provided). To overcome this rejection, Applicant may set forth each alternative (or grouping of patentably indistinct alternatives) within an improper Markush grouping in a series of independent or dependent claims and/or present convincing arguments that the group members recited in the alternative within a single claim in fact share a single structural similarity as well as a common use. Claim Objections Claims 12, 15-17, 20, 25, 26 and 28 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. Conclusion No claims are allowed at this time. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JAGADISHWAR RAO SAMALA whose telephone number is (571)272-9927. The examiner can normally be reached Monday-Friday 9am-6pm. 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, Hartley G Michael can be reached at 571 272 0616. 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.R.S/Examiner, Art Unit 1618 /Michael G. Hartley/Supervisory Patent Examiner, Art Unit 1618
Read full office action

Prosecution Timeline

Feb 28, 2024
Application Filed
Feb 28, 2024
Response after Non-Final Action
Jul 30, 2026
Examiner Interview (Telephonic)
Aug 06, 2026
Response after Non-Final Action
Aug 07, 2026
Examiner Interview Summary
Aug 26, 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
68%
Grant Probability
99%
With Interview (+55.6%)
3y 2m (~7m remaining)
Median Time to Grant
Low
PTA Risk
Based on 796 resolved cases by this examiner. Grant probability derived from career allowance rate.

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