Prosecution Insights
Last updated: May 29, 2026
Application No. 18/019,682

METHOD FOR PURIFYING TRIALKYLAMINE, TRIALKYLAMINE PRODUCTION METHOD AND COMPOSITION

Final Rejection §112
Filed
Feb 03, 2023
Priority
Aug 05, 2020 — JP 2020-133282 +1 more
Examiner
SAWYER, JENNIFER C
Art Unit
1691
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Central Glass Company Limited
OA Round
2 (Final)
68%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
59%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
379 granted / 553 resolved
+8.5% vs TC avg
Minimal -9% lift
Without
With
+-9.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
24 currently pending
Career history
592
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
67.4%
+27.4% vs TC avg
§102
9.1%
-30.9% vs TC avg
§112
8.9%
-31.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 553 resolved cases

Office Action

§112
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 . Detailed Action This office action is in response to applicant’s amended claims filed 12/29/25. Claims 13, 15-20, 26-34 and 37 are pending in this application. Claims 20 and 26-31 are withdrawn and have been cancelled. In view of applicant's amendments to the claims filed 12/29/25, the objection, the 35 USC 112 rejection and the 35 USC 102/103 rejection by Besancon et al. (US 8664446, pub date March 4, 2014) over claims 13-19 and 32-37 have been withdrawn. The examiner attempted to contact the applicant, Chao Gao, to resolve pending issues on the claims on 5/1/26 but was unsuccessful. Claim Rejections – 35 USC 112 The following is a quotation of the second paragraph of 35 U.S.C. 112: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 13, 15-19, 32-34 and 37 are rejected under 35 U.S.C. 112, second paragraph, because of a lack of antecedent basis. Claim 13 recites “the crude trimethylamine” three times. However there is no earlier recitation for “a crude trimethylamine” in the claim. Thus there is insufficient antecedent basis for this limitation in the claim. The dependent claims are rejected as being dependent on a rejected claim. Applicant is advised to correct the claim language. Reason for the Withdrawal of the 102/103 Rejection In view of applicant's amendments to the claims filed 12/29/25, the 35 USC 102/103 rejection by Besancon et al. (US 8664446, pub date March 4, 2014) has been withdrawn. The examiner has found applicant’s arguments convincing with regard to the lack of teaching in Besancon et al. for the removal of the dimethylamine impurity in the purification of trimethylamine. Furthermore, applicant has further clarified the invention in the new claim amendments filed 12/29/25. Applicant’s new claims require the crude trialkylamine in the gaseous state to flow in contact with the zeolite for 50 seconds or longer. On page 11 of applicant’s remarks filed 12/29/25, the applicant provided data in a graph that show the concentration of dimethylamine is further decreased by the claimed increased contact time of 50 seconds or longer. Thus, the claims as now drafted are therefore free of the prior art. Conclusion Claims 13, 15-19, 32-34 and 37 are rejected. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 extension fee 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 date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Jennifer Cho Sawyer whose telephone number is (571) 270 1690. The examiner can normally be reached on Monday-Friday 9 AM - 6 PM PST. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Renee Claytor can be reached on (571) 272-8394. The fax phone number for the organization where this application or proceeding is assigned is 571-274-1690. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. Jennifer Cho Sawyer Patent Examiner Art Unit: 1691 /RENEE CLAYTOR/ Supervisory Patent Examiner, Art Unit 1691
Read full office action

Prosecution Timeline

Feb 03, 2023
Application Filed
Oct 02, 2025
Non-Final Rejection mailed — §112
Nov 06, 2025
Interview Requested
Nov 13, 2025
Applicant Interview (Telephonic)
Dec 29, 2025
Response Filed
May 11, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12637409
STYRYL CARBOXYLATE DERIVATIVES
2y 0m to grant Granted May 26, 2026
Patent 12630499
BENZALDEHYDE OXIMES AND METHOD FOR PRODUCING SAME
3y 2m to grant Granted May 19, 2026
Patent 12623999
CARBAMATE PRODUCTION METHOD, CARBAMATE ESTER PRODUCTION METHOD, AND UREA DERIVATIVE PRODUCTION METHOD
3y 5m to grant Granted May 12, 2026
Patent 12617750
PROCESS FOR THE PREPARATION OF HEXAMETHYLENEDIAMINE BY HYDROGENATION OF ADIPONITRILE IN THE PRESENCE OF RANEY NICKEL AND A BASIC CO-CATALYST
3y 7m to grant Granted May 05, 2026
Patent 12617753
UREA DERIVATIVES AND THEIR USE AS CURATIVES AND CURATIVE ACCELERATORS FOR RESIN SYSTEMS
3y 2m to grant Granted May 05, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
68%
Grant Probability
59%
With Interview (-9.4%)
2y 9m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 553 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month