Prosecution Insights
Last updated: October 04, 2026
Application No. 18/040,383

LOW MOLECULAR WEIGHT PROTEIN DEGRADERS AND THEIR APPLICATIONS

Final Rejection §102§103§112
Filed
Feb 02, 2023
Priority
Aug 03, 2020 — PL PCT/PL2020/000066 +1 more
Examiner
TRAN, SUSAN T
Art Unit
1615
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Captor Therapeutics S A
OA Round
2 (Final)
63%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allowance Rate
654 granted / 1041 resolved
+2.8% vs TC avg
Strong +35% interview lift
Without
With
+35.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
32 currently pending
Career history
1073
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
40.9%
+0.9% vs TC avg
§102
20.9%
-19.1% vs TC avg
§112
21.8%
-18.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1041 resolved cases

Office Action

§102 §103 §112
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 . Election/Restrictions Applicant’s election without traverse of Group I in the reply filed on 09/18/2025 is acknowledged. Applicant also elected compound PNG media_image1.png 181 377 media_image1.png Greyscale without traverse. This compound appears to be compound ID 3 from claim 13. Claim 20 has been amended to depend from Claim 1, hence, the rejoinder. Claims 3, 4, 8, 10, 11, 16, 17, 22, 23, 25-49, 51, 52, 56, 59, 60, 62, 67-69 and 71-76 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected inventions and species, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 09/18/2025. 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, 6, 7, 9, 12-15, 18-20, 22-36, 41-45, 50, 53, 55, 57, 58, 61, 63-66 and 70 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. This rejection has been withdrawn in view of the Amendment filed 04/30/2026. Claim Rejections - 35 USC § 102 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. Claim 1, 6, 7, 9, 12, 14, 15, 19, 20, 22-36, 41-45, 50, 53, 55, 57, 58, 61, 63-66 and 70 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by WO 2019/038717 A1 (WO ‘717). This rejection has been withdrawn in view of the Amendment filed 04/30/2026. Claim Rejections - 35 USC § 103 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. Claims 1, 6, 7, 9, 12, 14, 15, 18-20, 50, 53, 55, 57, 58, 61, 63-66 and 70 are rejected under 35 U.S.C. 103 as being unpatentable over Greig et al. US 20150359784 A1, in view of Man et al. Bioorganic & Medicinal Chemistry Letters 13 (2003). Greig teaches a compound having formula below: PNG media_image2.png 108 219 media_image2.png Greyscale where R8 is hydrogen, hydroxyl, acyl, substituted acyl, acyloxy, substituted acyloxy, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, aryl, substituted aryl, amino, substituted amino, halogen, heterocycloalkyl, substituted heterocycloalkyl, heteroaryl, substituted heteroaryl, or a thio-containing group. See page 1 and 5-6. The disclosed compounds include one or more asymmetric centers, thus, these compounds can exist in different stereoisomeric forms. Accordingly, compounds and compositions may be provided as individual pure enantiomers or as stereoisomeric mixtures, including racemic mixtures. In certain embodiments the compounds disclosed herein are synthesized in or are purified to be in substantially enantiopure form, such as in a 90% enantiomeric excess, a 95% enantiomeric excess, a 97% enantiomeric excess or even in greater than a 99% enantiomeric excess, such as in enantiopure form. See paragraph 0060. Greig does not expressly teach the alpha-fluoro-substituted thalidomide analogues. However, alpha-fluoro-substituted thalidomide analogues is known in the art. See for example the teaching in Man et al. Thus, it would have been prima facie obvious to one of ordinary skill in the art to optimize the teaching in Greig in view of the teaching in Man with the expectation to obtain a thalidomide derivative or analogue useful for the treatment of cancer. This is because Man teaches the use of an alpha-substituted thalidomide compound for the treatment of a wide variety of diseases including tumor is known in the art. Response to Arguments Applicant’s arguments filed 04/30/2026 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Allowable Claims Claim 13 is 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 Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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. Correspondence Any inquiry concerning this communication or earlier communications from the examiner should be directed to SUSAN T TRAN whose telephone number is (571)272-0606. The examiner can normally be reached Monday-Friday, 8:30 am-5:30 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, ROBERT A. WAX can be reached at 571-272-0623. 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. /SUSAN T TRAN/Primary Examiner, Art Unit 1615
Read full office action

Prosecution Timeline

Feb 02, 2023
Application Filed
Dec 02, 2025
Non-Final Rejection mailed — §102, §103, §112
Apr 30, 2026
Response Filed
Jul 03, 2026
Examiner Interview (Telephonic)
Jul 15, 2026
Final Rejection mailed — §102, §103, §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

3-4
Expected OA Rounds
63%
Grant Probability
98%
With Interview (+35.1%)
3y 1m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1041 resolved cases by this examiner. Grant probability derived from career allowance rate.

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