Prosecution Insights
Last updated: August 15, 2026
Application No. 18/038,530

METHOD FOR THE PRODUCTION OF THERMOPLASTIC POLYOXAZOLIDINONE POLYMERS

Non-Final OA §102§103
Filed
May 24, 2023
Priority
Dec 03, 2020 — EU 20211473.2 +2 more
Examiner
LEONARD, MICHAEL L
Art Unit
1763
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Covestro AG
OA Round
3 (Non-Final)
64%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
72%
With Interview

Examiner Intelligence

Grants 64% of resolved cases
64%
Career Allowance Rate
856 granted / 1346 resolved
-1.4% vs TC avg
Moderate +8% lift
Without
With
+8.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
49 currently pending
Career history
1394
Total Applications
across all art units

Statute-Specific Performance

§101
1.3%
-38.7% vs TC avg
§103
52.9%
+12.9% vs TC avg
§102
19.1%
-20.9% vs TC avg
§112
18.2%
-21.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1346 resolved cases

Office Action

§102 §103
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 . Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 05/20/2026 has been entered. Claim Rejections - 35 USC § 102 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 12 and 14 are rejected under 35 U.S.C. 103 as being unpatentable over U.S. Patent Pub. No. 2018/002871 to Muller et al. As to claims 12 and 14, it is noted that claims 12 and 14 claim a polyoxazolidione all elected claims are recited in the product-by-process format by use of the language, "A thermoplastic polyoxazolidione formed from a method comprising..." Case law holds that: Even 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. See In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985). To the extent that the process limitations in a product-by-process claim do not carry weight absent a showing of criticality, the reference discloses the claimed product in the sense that the prior art product structure is seen to be no different from that indicated by the claims. Allowable Subject Matter Claims 1-2, 4-11, 13, and 16-22 are allowable over the prior art. The closest prior art fails to teach a process for preparing a thermoplastic polyoxazolidinone using a substituted or unsubstituted aryl nitrile component as solvent wherein a calculated mass ratio of diisocyanate, diepoxides, a compound (D) to the sum of the same and the claimed solvent in amounts that range from 10 to 90 wt%. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MICHAEL L LEONARD whose telephone number is (571)270-7450. The examiner can normally be reached M - F 7:00-4:00. 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, Joseph Del Sole can be reached at 571-272-1130. 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. /MICHAEL L LEONARD/Primary Examiner, Art Unit 1763
Read full office action

Prosecution Timeline

May 24, 2023
Application Filed
Nov 28, 2025
Non-Final Rejection mailed — §102, §103
Feb 09, 2026
Response Filed
Mar 20, 2026
Final Rejection mailed — §102, §103
May 20, 2026
Request for Continued Examination
May 22, 2026
Response after Non-Final Action
Jun 26, 2026
Non-Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12703768
DEGRADABLE BIO-BASED POLYMERS
3y 9m to grant Granted Aug 11, 2026
Patent 12703769
RHEOLOGY CONTROL AGENT
3y 2m to grant Granted Aug 11, 2026
Patent 12703770
HEAT-SHRINKABLE POLYESTER FILM, HEAT-SHRINKABLE LABEL, AND PACKAGE PRODUCT
3y 5m to grant Granted Aug 11, 2026
Patent 12686738
POLYURETHANE RESIN, NON-NATURAL LEATHER, AND INK
3y 5m to grant Granted Jul 21, 2026
Patent 12679909
Method for Multicolor Lithography Using Mechanical Force
3y 3m to grant Granted Jul 14, 2026
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
64%
Grant Probability
72%
With Interview (+8.4%)
3y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1346 resolved cases by this examiner. Grant probability derived from career allowance rate.

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