Prosecution Insights
Last updated: October 25, 2026
Application No. 18/056,609

Cryogenic Elastomer from Ionic Liquid Epoxy

Final Rejection §103
Filed
Nov 17, 2022
Examiner
OYER, ANDREW J
Art Unit
1767
Tech Center
1700 — Chemical & Materials Engineering
Assignee
National Aeronautics and Space Administration
OA Round
5 (Final)
79%
Grant Probability
Favorable
6-7
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allowance Rate
491 granted / 620 resolved
+14.2% vs TC avg
Strong +17% interview lift
Without
With
+16.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
37 currently pending
Career history
660
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
39.2%
-0.8% vs TC avg
§102
18.6%
-21.4% vs TC avg
§112
25.7%
-14.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 620 resolved cases

Office Action

§103
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 . Response to Amendments and Arguments Applicant's arguments filed 13 July 2026 have been fully considered but they are not persuasive. Applicant argues that the Paley fails to teach or suggest the composition of claim 1. However, the instant claims are rejected in view of Paley and Lammerschop. Regarding the combination the applicant argues that the resulting combination fails to teach that the mixing and curing is done in such a way as to have a glass transition temperature of -95°C ± 10°C. However, Paley and Lammerschop teach the same combination made with the same compounds. There is nothing of record in the instant specification that would provide guidance to a person having ordinary skill in the art to believe that the glass transition temperature would not be achieved through the combination of Paley and Lammerschop. Specifically, the dependent claims to curing temperature and curing duration are both met by the teachings of Paley. Therefore, a person having ordinary skill in the art would find it obvious that the glass transition temperature would be the same if the same components are mixed under the same conditions. Accordingly, the rejections under 35 U.S.C. § 103 are maintained. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1, 4-8, and 24 are rejected under 35 U.S.C. 103 as being unpatentable over Paley et al. (US 2010/0004389, hereinafter referred to as “Paley ‘389”) in view of Lammerschop et al. (US 2007/0231582, hereinafter referred to as “Lammerschop”). As to Claims 1, 4, and 24: Paley teaches a method of making cured elastomer comprising mixing an ionic liquid epoxy and a curing agent [0019]. Paley further teaches that the resin cures in 1-2 hours at 150-200°C which reads on a curing duration and a curing temperature [0019]. Paley further teaches that the ionic liquid epoxy monomer resins are cured using curing agents such as diamine, triamine, or tetraamine compounds [0016]. Paley further teaches that the ionic liquid epoxy is 1,3-bis(glycidyl)imidazolium trifluoromethanesulfonimide [0018]. Paley does not teach an example wherein the curing agent has a molecular weight of greater than 300 grams per mol. However, Lammerschop teaches suitable curing agents for epoxy compositions include triamines such as T-403 which is a polyetheramine compound having a molecular weight of greater than 300 grams per mol [0040]. Paley and Lammerschop are analogous art in that they are from the same field of endeavor, namely epoxy compositions. It would have been obvious to a person having ordinary skill in the art to use the T-403 curing agent of Lammerschop as the curing agent in the ionic liquid epoxy composition of Paley because Paley teaches that any diamine, triamine or tetramine compound can be used as a curing agent [0016] and Lammerschop teaches that T-403 is a known triamine curing agent for epoxy compositions [0040]. As to Claims 5 and 6: Paley and Lammerschop render obvious the composition of claim 1 (supra). Paley further teaches that the ratio of the ionic liquid epoxy to the curing agent can be 2:1 [0022]. As to Claim 7: Paley and Lammerschop render obvious the composition of claim 1 (supra). Paley further teaches that the curing temperature can be 150-200°C [0019]. As to Claim 8: Paley and Lammerschop render obvious the composition of claim 1 (supra). Paley further teaches that the curing duration can be 1-2 hours [0019]. Claims 16-18, 23, and 26 are rejected under 35 U.S.C. 103 as being unpatentable over Paley et al. (US 2010/0004389, hereinafter referred to as “Paley ‘389”) in view of Lammerschop et al. (US 2007/0231582, hereinafter referred to as “Lammerschop”). As to Claims 16-18, 23, and 26: Paley teaches a method of making cured elastomer comprising mixing an ionic liquid epoxy and a curing agent [0019]. Paley further teaches that the resin cures in 1-2 hours at 150-200°C which reads on a curing duration and a curing temperature [0019]. Paley further teaches that the ionic liquid epoxy is 1,3-bis(glycidyl)imidazolium trifluoromethanesulfonimide [0018]. Paley further teaches that the liquid mixture can be applied between two surfaces and cured at room temperature [0021]. Paley further teaches that the ionic liquid epoxy monomer resins are cured using curing agents such as diamine, triamine, or tetraamine compounds [0016]. Paley does not teach an example wherein the curing agent has a molecular weight of greater than 300 grams per mol. However, Lammerschop teaches suitable curing agents for epoxy compositions include triamines such as T-403 which is a polyetheramine compound having a molecular weight of greater than 300 grams per mol [0040]. Paley and Lammerschop are analogous art in that they are from the same field of endeavor, namely epoxy compositions. It would have been obvious to a person having ordinary skill in the art to use the T-403 curing agent of Lammerschop as the curing agent in the ionic liquid epoxy composition of Paley because Paley teaches that any diamine, triamine or tetramine compound can be used as a curing agent [0016] and Lammerschop teaches that T-403 is a known triamine curing agent for epoxy compositions [0040]. Conclusion 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 nonprovisional extension fee (37 CFR 1.17(a)) 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. Correspondence Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANDREW J OYER whose telephone number is (571)270-0347. The examiner can normally be reached 9AM-6PM EST M-F. 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, Mark Eashoo can be reached on (571)272-1197. 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. /Andrew J. Oyer/Primary Examiner, Art Unit 1767
Read full office action

Prosecution Timeline

Show 3 earlier events
Aug 23, 2024
Non-Final Rejection mailed — §103
Feb 24, 2025
Response Filed
May 19, 2025
Final Rejection mailed — §103
Nov 19, 2025
Request for Continued Examination
Nov 21, 2025
Response after Non-Final Action
Jan 12, 2026
Non-Final Rejection mailed — §103
Jul 13, 2026
Response Filed
Sep 28, 2026
Final Rejection mailed — §103 (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

6-7
Expected OA Rounds
79%
Grant Probability
96%
With Interview (+16.8%)
2y 7m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 620 resolved cases by this examiner. Grant probability derived from career allowance rate.

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