Prosecution Insights
Last updated: October 04, 2026
Application No. 18/542,990

MELT-PROCESSABLE POLYIMIDES WITH HIGH GLASS TRANSITION TEMPERATURE

Non-Final OA §102
Filed
Dec 18, 2023
Priority
Dec 20, 2022 — EU 22214870.2
Examiner
NGUYEN, HA S
Art Unit
Tech Center
Assignee
Evonik Fibres GmbH
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
4m
Est. Remaining
38%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allowance Rate
369 granted / 629 resolved
-1.3% vs TC avg
Minimal -21% lift
Without
With
+-21.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
43 currently pending
Career history
659
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
42.3%
+2.3% vs TC avg
§102
22.2%
-17.8% vs TC avg
§112
22.2%
-17.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 629 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 . 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)(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) 15-34 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by US 2008/0044684 A1 to Chan et al. (hereinafter Chan). Regarding claims 15-34, Chan teaches a polyimide obtained by first preparing a polyamic solution from mixing a dianhydride, water, and solvent with two different diamines (para 55), and the polyamic solution is cast as a film one support filmed, dried and imidized to form a polyimide film (para 233-234), wherein for Example 39, the mixture reacted is 50 mol% of 4,4’-oxydiphthalic anhydride (ODPA), 40 mol% of 4,4’-diaminodiphenylsulfone (DDS) and 10-40 mol% of 1,3-bis(4-aminophenoxy)benzene (1,3,4-APB), (See para 217-234, Table 1, Examples 39 and 40), which meets the claimed polyimide formula (Ia) and (Ib), wherein ODPA meets R1 and X1, and R3 and Y1, DDS meets R2, and 134-APB meets R4c, and a DDS:134-APB molar ratio of 0.80 : 0.20, which meets the claimed molar ratio. The above is mixed in a solvent of Dimethylacetamide (See examples), which meets the polar aprotic solvent, and the reaction mixture is heated from 0-200 deg C (See Fig. 1), in an inert atmosphere of nitrogen (para 233). Chan further teaches the above polyimide units will range from 10-500 units (para 85), preferably 10-200 (para 57), which meets the claimed combined m and n range. Chan states that if there is a slight excess of amine used, they can be terminated/chainstopped with phthalic anhydride used as terminal end groups (para 57 and 194), which meets the claimed stoichiometric balance. Chan further teaches the polyimide may further contain additives such as stabilizers, and flow aids (para 80). In regard to the properties of the Mw and polydispersity, the one skilled in the art would have a reasonable expectation for the polyimide to have the claimed properties of the claimed invention because Chan teaches a substantially identical composition to the claimed invention such as the imidization reaction of ODPA, DDS, and 134-APB, in a molar ratio within the claimed range and Applicant states in their specification that it is the molar ratios which controls the degree of polymerization and the m and n ranges. See MPEP 2112.01. (Where the claimed and prior art products are identical or substantially identical in structure or composition, or are produced by identical or substantially identical processes, a prima facie case of either anticipation or obviousness has been established. In re Best, 562 F.2d 1252, 1255, 195 USPQ 430, 433 (CCPA 1977)). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to HA S NGUYEN whose telephone number is (571)270-7395. The examiner can normally be reached Mon-Fri, Flex schedule 7:30am-4:00pm. 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, Randy Gulakowski can be reached at (571)272-1302. 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. /HA S NGUYEN/ Primary Examiner, Art Unit 1766
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Prosecution Timeline

Dec 18, 2023
Application Filed
Sep 23, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
59%
Grant Probability
38%
With Interview (-21.0%)
3y 2m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 629 resolved cases by this examiner. Grant probability derived from career allowance rate.

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