Prosecution Insights
Last updated: April 19, 2026
Application No. 18/262,777

PROCESS FOR MANUFACTURING A DIPHENYLPHRAZINE DERIVATIVE

Non-Final OA §102
Filed
Jul 25, 2023
Examiner
VAJDA, KRISTIN ANN
Art Unit
1622
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Actelion Pharmaceuticals Ltd.
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
2y 0m
To Grant
95%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allow Rate
1331 granted / 1581 resolved
+24.2% vs TC avg
Moderate +10% lift
Without
With
+10.5%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 0m
Avg Prosecution
36 currently pending
Career history
1617
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
11.2%
-28.8% vs TC avg
§102
27.6%
-12.4% vs TC avg
§112
33.6%
-6.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1581 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 1-15 are pending in the instant application. Claims 1, 5, 7, 8, 10, and 15 are rejected. Claims 2-4, 6, 9, and 11-14 are objected. Information Disclosure Statements The information disclosure statements filed on June 3, 2024, August 1, 2024, September 16, 2024, and January 2, 2025 have been considered and signed copies of form 1449 are enclosed herewith. 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)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1, 5, 7, 8, 10, and 15 are rejected under 35 U.S.C. 102(a)(2) as being anticipated by WO 2021/033702 A1. WO 2021/033702 A1 discloses a process for the preparation of a calcium salt of {4-[5,6-diphenylpyrazin-2-yl)(propan-2-yl)amino]butoxy}acetic acid or MRE-269 (see example 8 on page 12), using an EtOH/water mixture as a solvent and a 1 molar eq. of calcium hydroxide. MRE-269, calcium hydroxide and EtOH/water were added to a vial and mixed at 50 ºC for 2 days; after cooling to room temperature, the solids were isolated by vacuum filtration and dried. Therefore, a process for the manufacturing of calcium; {4-[5,6-diphenylpyrazin-2-yl)(propan-2-yl)amino]butoxy}acetate of the claims wherein the first calcium source is added in an amount of 1 mol per mol {4-[5,6-diphenylpyrazin-2-yl)(propan-2-yl)amino]butoxy}acetic acid; solvent (a) is an organic solvent mixed with water; and wherein the organic solvent in solvent (a) is ethanol is anticipated by the reference. The product obtained by the process of the claims is also anticipated by the reference. It is noted that “[e]ven though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process.” In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985) (citations omitted). Therefore, it is recommended by the examiner that clam 15 be canceled. It is also noted that the process of claim 1 involves the step of optionally (emphasis added) re-slurrying the isolated solid product in a solution of a second calcium source in a solvent (b) at a temperature in the range of 20ºC to 85ºC and this step is not limiting to the process. Therefore, it is recommended by the examiner that the word “optionally” be deleted from the claim. Claim Objections Claims 2-4, 6, 9, and 11-14 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

Jul 25, 2023
Application Filed
Jan 06, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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AMINO-PYRIMIDINE AMIDES
2y 5m to grant Granted Apr 14, 2026
Patent 12600745
PROCESS FOR PREPARING B-[(7a, 1713)-17-HYDROXY-7-[9-[(4,4,5,5,5-PENTAFLUOROPENTYL)SULFINYL]NONYL]ESTRA-1,3,5(10)-TRIEN-3-YL]-BORONIC ACID
2y 5m to grant Granted Apr 14, 2026
Patent 12590094
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Patent 12590093
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2y 5m to grant Granted Mar 31, 2026
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 (+10.5%)
2y 0m
Median Time to Grant
Low
PTA Risk
Based on 1581 resolved cases by this examiner. Grant probability derived from career allow rate.

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