Prosecution Insights
Last updated: September 17, 2026
Application No. 18/580,851

PROCESSES FOR THE PREPARATION OF ESTETROL AND INTERMEDIATES THEREOF

Non-Final OA §112
Filed
Jan 19, 2024
Priority
Jul 23, 2021 — IT 102021000019631 +1 more
Examiner
CHENG, KAREN
Art Unit
1623
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Newchem S P A
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
525 granted / 689 resolved
+16.2% vs TC avg
Strong +27% interview lift
Without
With
+26.7%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
44 currently pending
Career history
730
Total Applications
across all art units

Statute-Specific Performance

§101
2.5%
-37.5% vs TC avg
§103
27.7%
-12.3% vs TC avg
§102
20.2%
-19.8% vs TC avg
§112
32.1%
-7.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 689 resolved cases

Office Action

§112
DETAILED ACTION Claims 1-14 are currently pending in the instant application. 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 with traverse of Group I, drawn to claims 1-8 and 13-14 in the reply filed on 06/10/2026 is acknowledged. The traversal is on the ground(s) that the special technical feature linking Groups I-III is a compound of formula (IIa) in crystalline form having high diastereoisomeric purity obtained through selective crystallization, which is not taught in the prior art. Applicant’s arguments have been found persuasive. Thus the restriction requirement between inventions I-III, as set forth in the Office action mailed on 04/14/2026, is hereby withdrawn and claims 9-12 are hereby rejoined and fully examined for patentability under 37 CFR 1.104. In view of the withdrawal of the restriction requirement, applicant(s) are advised that if any claim presented in a divisional application is anticipated by, or includes all the limitations of, a claim that is allowable in the present application, such claim may be subject to provisional statutory and/or nonstatutory double patenting rejections over the claims of the instant application. Once the restriction requirement is withdrawn, the provisions of 35 U.S.C. 121 are no longer applicable. See In re Ziegler, 443 F.2d 1211, 1215, 170 USPQ 129, 131-32 (CCPA 1971). See also MPEP § 804.01. Priority PNG media_image1.png 68 378 media_image1.png Greyscale Information Disclosure Statement Applicant's Information Disclosure Statement filed on 01/19/2024 has been considered. Please refer to Applicant's copies of the 1449 submitted herewith. 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 1-8 and 13-14 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 term “high diastereoisomer purity” in claim 1 is a relative term which renders the claim indefinite. The term “high diastereoisomer purity” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. Specifically it is unclear what would be considered “high diastereoisomer purity” as the term “high” means a greater degree, amount, cost, value, or content than average, usual, or expected but since there is no definition in the Specification for what would be considered average or usual, one could not determine how pure the compound of formula (IIa) needs to be. Since claims 2-8 and 13-14 do not fix the issue, they have been rejected as well. Allowable Subject Matter Claims 9-12 are allowed. The closest prior art of record: WO 2013/034780 teaches preparation of PNG media_image2.png 102 184 media_image2.png Greyscale but does not teach said compound in crystalline form or preparation of said crystalline form. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KAREN CHENG whose telephone number is (703)756-4699. The examiner can normally be reached M-F, 9AM-6PM PST. 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, Adam Milligan can be reached at 571-270-7674. 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. /KAREN CHENG/Primary Examiner, Art Unit 1623 /ANAND U DESAI/Supervisory Patent Examiner, Art Unit 1655
Read full office action

Prosecution Timeline

Jan 19, 2024
Application Filed
Aug 07, 2026
Examiner Interview (Telephonic)
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
76%
Grant Probability
99%
With Interview (+26.7%)
2y 1m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 689 resolved cases by this examiner. Grant probability derived from career allowance rate.

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