Prosecution Insights
Last updated: July 17, 2026
Application No. 18/580,519

PREPARATION METHOD OF 3- (2, 2, 2-TRIFLUOROETHYL) PYRROLIDINE HYDROCHLORIDE

Non-Final OA §112
Filed
Jan 18, 2024
Priority
Jul 19, 2021 — CN 202110813487.5 +2 more
Examiner
HSU, GRACE CHING
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Pierre Fabre Médicament
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
10m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
35 granted / 46 resolved
+16.1% vs TC avg
Strong +28% interview lift
Without
With
+28.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
13 currently pending
Career history
65
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
32.3%
-7.7% vs TC avg
§102
22.9%
-17.1% vs TC avg
§112
31.3%
-8.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 46 resolved cases

Office Action

§112
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 . Status This is in response to January 18, 2024 New Application filing with corresponding documents. Claims 1-20 Care pending and are under examination in the above-identified application. Priority The present application U.S. Appln. Ser. No.:18/580,519, Filed: 01/18/2024 is a 371 Nat.’l Stage entry of WO 2023/001088 A1 (i.e., PCT/CN2022/106174, Intern.’ l Filing Date: 07/18/2022), which claims foreign priority to either CN113563242A (i.e., CN2021/ 10813487.5) and CN113548994A (CN 2021/10814726.9), each respectively, filed on 07/19/2021. However, to overcome art rejections, while certified foreign documents were filed in the Chinese language, NO corresponding certified ENGLISH translation were filed for either of those Chinese language documents; i.e., therefore the earliest priority or effective filing date (EFD) for prior art consideration is 07/19/2022. 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. Claims 1 to 20 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. Claims 1-10, 12, 14 and 17-18, respectively lacks clarity for reasons discussed below: In particular, claims 1 and 5 are unclear for incorrectly naming the intermediate product at the end of step (a) in those claims, which then subsequently reappears in step (b) as the intermediate compound that is further reacted upon; i.e., in step (a) reaction of N-benzylpyrrolidone with trifluoroacetic anhydride cannot result in the incorrect compound name 3-(1-chloro-2, 2, 2- trifluoroethylidene)-N-benzylpyrrole, instead the correct compound intermediate formed should be named: “3-(1-chloro-2, 2, 2- trifluoroethylidene) -N-benzylpyrrolidone”, which correctly corresponds to chemical structure is shown in Fig. 1 and described written description of Example 3 (i.e., see paras. [0087]-[0095], esp. [0089]-[0091]): PNG media_image1.png 296 750 media_image1.png Greyscale likewise in step (b) of claims 1 and 5, respectively, in claim 1, the subsequent step (b) of the first compound reacted therein occurs by: “dissolving 3-(1-chloro-2, 2, 2- trifluoroethylidene) -N-benzylpyrrolidone . . .”, In claim 5. “wherein in the step (b), the mass ratio of 3-(1-chloro-2, 2, 2- trifluoroethylidene) -N-benzylpyrrolidone”, not incorrect compound 3-(1-chloro-2, 2, 2- trifluoroethylidene)-N-benzylpyrrole, Claim 1 also is indefinite, vague, ambiguous and lacks clarity for recitation such that the metes and bounds of the claimed invention are rendered indeterminate, because: [a] Steps (a) and (d) each recite presence of “a catalyst and hydrogen”, with each recitation of “a catalyst” reacting on a different intermediate substrate, without any differentiation (i.e., without knowing more, it is the same catalyst or a different catalyst or an additional amount of the same catalyst?). It is recommended that claim 1 be amended to indicate that there are two different applications of what appears from the reaction scheme is the same catalyst used in this reaction sequence. Clarification is required. For consistency, it is suggested that step (a) be amended to recite reacting N-benzylpyrrolidone with trifluoroacetic anhydride to obtain 3-(1-chloro-2, 2, 2- trifluoroethylidene)-N-benzylpyrrolidone” to form a reaction mixture”. Claims 2, 7, 8, 12, 17,18 are rejected under 35 U.S.C. § 112(b) for indefiniteness and ambiguity for failure to particularly point out and distinctly claim the subject matter regarded as the invention, due to recitation of the terms “preferably” ” (i.e., in claims 6, 8, 16, 18), or “specifically comprising” (i.e., in claims 2, 7, 8, 12, 17,18)” in each of the various method steps in preparation enders the aforementioned claim ambiguous. In particular, The term "preferably" introduces ambiguity as it suggests flexibility in scope—i.e., preparation method or process might further comprise an additional step in order to effectuate a certain chemical reaction transformation to yield and obtained the specifically desired compound, such that application of the term preferably done to perform an action fails to make a specific desired molecule. Claims 4 and 14, respectively lack clarity, is ambiguous and has antecedent basis issues, for the following reasons: Recitation of the term “PE”, especially when or no previous identification for the aforementioned phrase (i.e., ethyl acetate). Based on aforementioned suggested claim 1 amendments, a proposed amendment to claim 4 as shown and likewise to claim 14 be made: “The preparation method according to claim 2, wherein the step (a) further comprises subjecting a mixture obtained after the reaction in this step to extraction and column chromatography, wherein a solvent used for the extraction is ethyl acetate (EA), and developing agents used for column chromatography are in a solution of petroleum ether (PE) and EA in a volume ratio of 10:1.” Clarification for each of the above is requested accordingly. Closest Prior Art The prior art made of record and not relied upon is considered pertinent to Applicant's disclosure are exemplified by these references that teach methods for making compounds of the instant claimed invention with different chemical preparation routes: [1] U.S. Pat. 9,067,930 B2 (Filed: April 8, 2014; Issued: June 30, 2015) discloses the preparation method of 3-(2,2,2-trifluoroethyl)-pyrrolidine hydrochloride (see col. 27, lines 1-35). PNG media_image2.png 568 514 media_image2.png Greyscale Bugeram, J. Org. Chem., 2019, vol. 84, No. 24, pp. 16105-16115, discloses a preparation method of 3-(2,2,2-trifluoroethyl)-pyrrolidine hydrochloride via a different chemical reaction sequence (i.e., different reaction steps) than that disclosed in the claimed invention (i.e., see Scheme 6 and description col. 2, at page 16108 shown below): PNG media_image3.png 263 481 media_image3.png Greyscale PNG media_image4.png 136 494 media_image4.png Greyscale CONCLUSION Any inquiry concerning this communication or earlier communications from the Examiner should be directed to GRACE C HSU whose telephone number is (571) 270-1689. The Examiner can normally be reached Monday-Friday 7:30 am - 6 pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, Applicants 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, KORTNEY L. KLINKEL can be reached on 571-270-5239. 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. /G.C.H./Examiner, Art Unit 1627 /Kortney L. Klinkel/Supervisory Patent Examiner, Art Unit 1627
Read full office action

Prosecution Timeline

Jan 18, 2024
Application Filed
Jun 11, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12678438
TREATMENT OF CANCER WITH CDK INHIBITORS
4y 8m to grant Granted Jul 14, 2026
Patent 12681018
PHOTOACTIVE FLUORESCENT COMPOUNDS AND USE THEREOF FOR LABELING OF PROTEINS
3y 11m to grant Granted Jul 14, 2026
Patent 12673933
AMINOPYRAZINE COMPOUNDS AS HPK1 INHIBITOR AND THE USE THEREOF
4y 4m to grant Granted Jul 07, 2026
Patent 12662461
TRICYCLIC COMPOUND AND PHARMACEUTICAL USE THEREOF
4y 1m to grant Granted Jun 23, 2026
Patent 12653809
UREA, AMIDE, AND SUBSTITUTED HETEROARYL COMPOUNDS FOR CBL-B INHIBITION
4y 4m to grant Granted Jun 16, 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

1-2
Expected OA Rounds
76%
Grant Probability
99%
With Interview (+28.2%)
3y 4m (~10m remaining)
Median Time to Grant
Low
PTA Risk
Based on 46 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