Prosecution Insights
Last updated: May 29, 2026
Application No. 18/258,418

KCNT1 INHIBITORS AND METHODS OF USE

Final Rejection §102
Filed
Jun 20, 2023
Priority
Dec 22, 2020 — provisional 63/129,083 +1 more
Examiner
HEASLEY, MEGHAN CHRISTINE
Art Unit
1626
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Praxis Precision Medicines Inc.
OA Round
2 (Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
1m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
88 granted / 115 resolved
+16.5% vs TC avg
Strong +36% interview lift
Without
With
+35.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
50 currently pending
Career history
155
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
50.4%
+10.4% vs TC avg
§102
20.1%
-19.9% vs TC avg
§112
11.1%
-28.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 115 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 . Status of the Claims Claims 1-20 are pending. Claims 4 and 8-20 are withdrawn. Claims 1 and 3 are rejected. Claim 2 is objected to. Claims 5-7 are allowable. Response to Amendments/Arguments Applicant’s arguments and amendments (particularly the removal of halogen from R5 definition in claim 1 and the inclusion of R2 definition in claim 5), filed 4/13/2026, with respect to the rejection(s) and objections of claim(s) 1-3 and 5-7 have been fully considered and are persuasive. Therefore, the rejections and objections have been withdrawn. However, upon further consideration and as necessitated by amendments, a new ground(s) of rejection is made in view of JP2005060255. Because all previous rejections and objections from the Office Action mailed 1/22/2026 are withdrawn, Applicant’s arguments from 4/13/2026 will not be addressed. 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(s) 1 and 3 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Eiji et al. (JP2005060255). Regarding instant claim 1, Eiji discloses the following structure (arrow added by Examiner to focus on compound 70): PNG media_image1.png 365 771 media_image1.png Greyscale (see para. [0036]), which is embraced by a compound of instant Formula (I): PNG media_image2.png 121 291 media_image2.png Greyscale , wherein X, Y, Z, Z’, and Y’ = CH; R5 = haloalkyl (4-CF3); R3 and R4 = H; R2 = H; R1 = C1 alkyl; R12 = phenyl (C2H5); x = 1. Regarding instant claim 3, the prior art compound number 70 supra is embraced by a compound of (I-c): PNG media_image3.png 104 345 media_image3.png Greyscale . Regarding the pharmaceutical composition with a pharmaceutically acceptable excipient, Eiji teaches the following in para. [0045] (carrier may be replaced by excipient to one of skill in the art): PNG media_image4.png 171 681 media_image4.png Greyscale . Allowable Subject Matter Claim 2 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. Claims 5-7 are allowed. The closest prior art is shown supra under the 35 USC 102 rejection but do not teach the claimed combinations of variables. Conclusion Applicant’s amendments necessitated the new ground(s) of rejection presented in this Office Action. Accordingly, THIS ACTION IS MADE FINAL. 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 extension fee 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MEGHAN C HEASLEY whose telephone number is (571)270-0785. The examiner can normally be reached Monday - Friday 8:30-4:30 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, Amy Clark can be reached on 571-272-1310. 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. /MEGHAN C HEASLEY/Examiner, Art Unit 1626 /KAMAL A SAEED/Primary Examiner, Art Unit 1626
Read full office action

Prosecution Timeline

Jun 20, 2023
Application Filed
Jan 22, 2026
Non-Final Rejection mailed — §102
Apr 13, 2026
Response Filed
May 07, 2026
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

3-4
Expected OA Rounds
76%
Grant Probability
99%
With Interview (+35.6%)
3y 0m (~1m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 115 resolved cases by this examiner. Grant probability derived from career allowance rate.

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