Prosecution Insights
Last updated: August 15, 2026
Application No. 17/271,799

COPOLYETHERESTER FORMULATION WITH IMPROVED HEAT-STABILITY

Non-Final OA §112
Filed
Feb 26, 2021
Priority
Aug 30, 2018 — provisional 62/724,908 +1 more
Examiner
USELDING, JOHN E
Art Unit
1763
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Celanese Polymers Holding Inc.
OA Round
7 (Non-Final)
54%
Grant Probability
Moderate
7-8
OA Rounds
0m
Est. Remaining
71%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allowance Rate
687 granted / 1284 resolved
-11.5% vs TC avg
Strong +18% interview lift
Without
With
+17.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
68 currently pending
Career history
1344
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
44.9%
+4.9% vs TC avg
§102
15.0%
-25.0% vs TC avg
§112
24.9%
-15.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1284 resolved cases

Office Action

§112
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 . 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and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114.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 6/17/2026 has been entered. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-15, 19 and 20 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. The original specification does not support the limitation “wherein the copolyetherester resin composition does not contain any additional thermoplastic resins.” The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 11-12 are rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 11 add an additional component, at least one arylamine antioxidant, that is excluded by the transitional phrase “consisting of” in claim 1. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Response to Arguments Applicant’s arguments, see Applicant Arguments, filed 6/17/2026, with respect to Takahashi et al. and Clark II et al. have been fully considered and are persuasive. The rejections have been withdrawn. Applicant's arguments with respect to the new matter rejection have been fully considered but they are not persuasive. The lack of a component in the examples is not support for a negative limitation. See MPEP 2173.05. Furthermore, the negative limitation is not needed in the claim since the transitional language “consisting of” will exclude additional compounds. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN USELDING whose telephone number is (571)270-5463. The examiner can normally be reached on M-F 8am to 6:30pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Joseph Del Sole can be reached on 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 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. /JOHN E USELDING/ Primary Examiner, Art Unit 1763
Read full office action

Prosecution Timeline

Show 12 earlier events
Nov 14, 2025
Request for Continued Examination
Nov 18, 2025
Response after Non-Final Action
Dec 22, 2025
Non-Final Rejection mailed — §112
Mar 23, 2026
Response Filed
Apr 09, 2026
Final Rejection mailed — §112
Jun 17, 2026
Request for Continued Examination
Jun 18, 2026
Response after Non-Final Action
Jun 30, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12698472
Novel Hydrogels
4y 7m to grant Granted Aug 04, 2026
Patent 12698378
GLASS-FIBER-CONTAINING FLAME-RETARDANT POLYCARBONATE RESIN COMPOSITION AND MOLDED OBJECT
3y 11m to grant Granted Aug 04, 2026
Patent 12698359
CATIONIC EPOXY COMPOSITIONS
3y 2m to grant Granted Aug 04, 2026
Patent 12686747
GLASS FIBER REINFORCED POLYPROPYLENE RESIN COMPOSITION AND MOLDED ARTICLE COMPRISING THE SAME
3y 7m to grant Granted Jul 21, 2026
Patent 12679951
Resin Molded Body and Resin Molded Body Production Method
4y 1m to grant Granted Jul 14, 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

7-8
Expected OA Rounds
54%
Grant Probability
71%
With Interview (+17.6%)
2y 8m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1284 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