Prosecution Insights
Last updated: April 19, 2026
Application No. 18/030,111

CATALYST PARTICLES FOR POLYESTER PRODUCTION AND METHOD FOR PRODUCING POLYESTER USING SAME

Non-Final OA §102
Filed
Apr 04, 2023
Examiner
EGWIM, KELECHI CHIDI
Art Unit
1762
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Teijin Limited
OA Round
1 (Non-Final)
70%
Grant Probability
Favorable
1-2
OA Rounds
3y 1m
To Grant
84%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allow Rate
551 granted / 789 resolved
+4.8% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
46 currently pending
Career history
835
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
27.9%
-12.1% vs TC avg
§102
45.9%
+5.9% vs TC avg
§112
19.2%
-20.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 789 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 . Election/Restrictions Applicant’s election without traverse of Group I, claims 1-9, in the reply filed on 11/12/2025 is acknowledged. Claims 10-24 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to nonelected inventions, there being no allowable generic or linking claim. 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) 1-9 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Nakane et al. (JP 2005325201). In ¶’s 29, examples 3 and 7, Nakane et al. teach a polyester polymerization catalyst which has an average particle diameter of 10μm or less (i.e., both D50 and D90 are 10μm or less), as achieved through a fine pulverization process, and which is a product of a reaction between a phosphorus compound (3) represented by general formula (Ill) and a titanium compound component comprising at least one type selected from among a titanium compound (1) represented by general formula (I) and a titanium compound (2) obtained by reacting said titanium compound (1) with an aromatic polycarboxylic acid represented by general formula (II) or an anhydride thereof (see the claims). Nakane et al. teaches, as examples, producing catalyst particles in which the titanium atom/phosphorus atom molar ratio is 1 :2 and which have an average particle diameter of 5 μm by reacting titanium tetrabutoxide with monobutyl phosphate (example 3). Regarding claim 9, it is noted that starting reaction temperature and reaction temperature is a feature of the process. The claimed product is the same as the presently claimed product absent evidence that the recited process of making results in a materially different product that does not meet the present claims. Even though product-by-process claims are limited and defined by the process, determination of patentability is based on the product itself. Thus, the requirements for rejection under 35 U.S.C. 102(a)(1) are met. Claim(s) 1-9 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Abe (JP 2011168635). In Examples 1-7 and the claims, Abe teach a polymerization catalyst for polyester production, which is obtained by reacting a titanium compound with a phosphorous compound and which has a particle diameter of 10 μm or less (i.e., both D50 and D90 are 10μm or less) (see the claims). In addition, Abe teaches, as examples, obtaining catalyst particles by adding titanium tetrabutoxide to a monobutyl phosphate solution under acidic conditions, gradually increasing the temperature, and carrying out a reaction at a temperature of 120°C (examples 1-7). Thus, the requirements for rejection under 35 U.S.C. 102(a)(1) are met. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: JP 2014227468 and JP 2015172149. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KELECHI CHIDI EGWIM whose telephone number is (571)272-1099. The examiner can normally be reached M-Th 9-7. 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 Jones can be reached at (571) 270-7733. 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. /KELECHI C EGWIM/Primary Examiner, Art Unit 1762 KCE
Read full office action

Prosecution Timeline

Apr 04, 2023
Application Filed
Feb 20, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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THERMOSETTING COMPOSITION, METHOD FOR MANUFACTURING MOLDED ARTICLE USING THE SAME, AND CURED PRODUCT
2y 5m to grant Granted Mar 31, 2026
Patent 12584028
CURABLE ORGANOPOLYSILOXANE COMPOSITION, AND OPTICAL MEMBER FORMED FROM CURED PRODUCT OF SAME
2y 5m to grant Granted Mar 24, 2026
Patent 12577460
Composition for production of coatings comprising improved phosphors
2y 5m to grant Granted Mar 17, 2026
Patent 12577373
CARBODIIMIDE COMPOSITION, CURING AGENT COMPOSITION, COATING COMPOSITION AND RESIN CURED PRODUCT
2y 5m to grant Granted Mar 17, 2026
Patent 12570851
LIQUIDS
2y 5m to grant Granted Mar 10, 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
70%
Grant Probability
84%
With Interview (+14.0%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 789 resolved cases by this examiner. Grant probability derived from career allow rate.

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