Prosecution Insights
Last updated: July 17, 2026
Application No. 18/275,287

CULLIN-RING E3 UBIQUITIN LIGASE 4 INHIBITOR COMPOUNDS AND METHODS OF THEIR USE

Non-Final OA §102
Filed
Aug 01, 2023
Priority
Feb 01, 2021 — provisional 63/144,358 +1 more
Examiner
VAJDA, KRISTIN ANN
Art Unit
1622
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Icahn School of Medicine At Mount Sinai
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allowance Rate
1351 granted / 1609 resolved
+24.0% vs TC avg
Moderate +11% lift
Without
With
+10.9%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 9m
Avg Prosecution
40 currently pending
Career history
1641
Total Applications
across all art units

Statute-Specific Performance

§101
2.3%
-37.7% vs TC avg
§103
14.5%
-25.5% vs TC avg
§102
27.9%
-12.1% vs TC avg
§112
25.2%
-14.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1609 resolved cases

Office Action

§102
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 . Claims 1-4, 9-11, 13-16, 18, 19, 21, 22, 32, 36, 43, 45, and 47 are pending in the instant application. Claims 2, 3, 14, 22, 32, 36, 43, 45, and 47 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to non-elected subject matter. The withdrawn subject matter is patentably distinct from the elected subject matter as it differs in structure and element and would require separate search considerations. In addition, a reference which anticipates one group would not render obvious the other. Claims 1, 4, 9, 10, and 13 are rejected. Claims 11, 15, 16, 18, 19, and 21 are objected. Information Disclosure Statements The information disclosure statements filed on September 15, 2023 and August 1, 2023 have been considered and signed copies of form 1449 are enclosed herewith. Drawings The drawings are objected to because the font on some of the figures (i.e., see Figures, 1A, 1C, 2A-E, 3A-B, etc.) is difficult to read or is illegible. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. The figure or figure number of an amended drawing should not be labeled as “amended.” If a drawing figure is to be canceled, the appropriate figure must be removed from the replacement sheet, and where necessary, the remaining figures must be renumbered and appropriate changes made to the brief description of the several views of the drawings for consistency. Additional replacement sheets may be necessary to show the renumbering of the remaining figures. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Election/Restrictions Applicant’s election without traverse of Group I, claims 1-4, 9-11, 13-16, 18, 19, 21, and 43, and the species compound KH-4-43 in the response filed on April 29, 2026 is acknowledged. The restriction requirements are still deemed proper and are hereby made final. The examiner will follow the guidelines of MPEP 803.02 wherein once a species is elected, it is examined for compliance with all applicable statutes for patentability and if compliance is found, then the examination is expanded to a reasonable number of elected species to determine whether they also comply with the statute. The examiner will determine whether the entire scope of the claims is patentable according to MPEP 803.02. Applicant's elected species appears allowable over the prior art of record. Therefore, according to MPEP 803.02: should no prior art be found that anticipated or renders obvious the elected species, the search of the Markush-type claim will be extended. If prior art is found that anticipated or renders obvious the Markush-type claim with respect to a nonelected species, the Markush-type claim shall be rejected and claims to the nonelected species held withdrawn from further consideration. The search of the Markush-type claim has been extended to the non-elected species wherein: R1 is PNG media_image1.png 66 90 media_image1.png Greyscale wherein R8 is PNG media_image2.png 68 94 media_image2.png Greyscale wherein n is 0; and the remaining variables are as defined. As prior art has been found which anticipates the above identified nonelected species, the Markush-type claims are rejected as follows and the subject matter of the claims drawn to nonelected species held withdrawn from consideration. Claims 1, 4, 9-11, 13, 15, 16, 18, 19, and 21 have been examined to the extent that they are readable on the elected embodiment and the above identified nonelected species. Since art was found on the nonelected species, subject matter not embraced by the elected embodiment or the above identified nonelected species is therefore withdrawn from further consideration. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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, 4, 9, and 10 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Wang et al. (Biochemical Pharmacology 79 (2010) 307-320). Wang et al. discloses the compound 74 (see Table 2 on pages 314 and 315) which anticipates a compound of the instant claims wherein R1 is PNG media_image1.png 66 90 media_image1.png Greyscale wherein R8 is PNG media_image2.png 68 94 media_image2.png Greyscale wherein n is 0; R2 is H; R3 and R4 are H; and R5 and R6 are OH. Claims 1, 4, 9, and 13 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by US 2007/0037752 A1. US 2007/0037752 A1 discloses the compound A9.122 (see page 148) which anticipates a compound of the instant claims wherein R1 is PNG media_image1.png 66 90 media_image1.png Greyscale wherein R8 is PNG media_image2.png 68 94 media_image2.png Greyscale wherein n is 0; R2 is CF3; R3 and R4 are H; and R5 and R6 are OAc. Claim Objections Claims 11, 15, 16, and 18 are objected to for depending on a previous rejected claim. However, even if the claims are amended to be in independent form, they would still not be in condition for allowance because they contain non-elected subject matter. In other words, the subject matter or species which are not embraced by the elected embodiment or the above identified nonelected species have been withdrawn from further consideration. Claims 19 and 21 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 Any inquiry concerning this communication or earlier communications from the examiner should be directed to KRISTIN ANN VAJDA whose telephone number is (571)270-5232. The examiner can normally be reached Mon-Fri 6:00-4:00. 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, James Alstrum-Acevedo can be reached at 571-272-5548. 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. /KRISTIN A VAJDA/Primary Examiner, Art Unit 1622
Read full office action

Prosecution Timeline

Aug 01, 2023
Application Filed
May 13, 2026
Non-Final Rejection mailed — §102 (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
84%
Grant Probability
95%
With Interview (+10.9%)
1y 9m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1609 resolved cases by this examiner. Grant probability derived from career allowance rate.

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