Prosecution Insights
Last updated: October 22, 2026
Application No. 18/602,643

FLUORINATED RESORCINOL AND HYDROQUINONE ANALOGS AS CURING AGENTS FOR FLUOROELASTOMERS

Non-Final OA §102
Filed
Mar 12, 2024
Priority
Sep 20, 2022 — provisional 63/408,349 +2 more
Examiner
KAUCHER, MARK S
Art Unit
1764
Tech Center
1700 — Chemical & Materials Engineering
Assignee
The Chemours Company FC LLC
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
2m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
734 granted / 1013 resolved
+7.5% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
32 currently pending
Career history
1049
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
42.9%
+2.9% vs TC avg
§102
23.3%
-16.7% vs TC avg
§112
20.4%
-19.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1013 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 . Priority It is noted that the instant application is a CIP of PCT/US23/33096. The following claims do not find support in provisional application 63/408,349: Claim 17, Claim 21 and Claim 22. Claim Rejections - 35 USC § 102 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-8 and 15-22 is/are rejected under 35 U.S.C. 102(a)(1) and/or 102(a)(2) as being anticipated by WO 2022/264838 (herein Kawasaki). Note that since claims 17 and 21-22 do not have support by the foreign priority, they are rejected under both 102(a)(1) and 102(a)(2), while claims 1-8, 15-16 and 19 are rejected under 102(a)(2). In setting forth the instant rejection, the English translation of the WO document filed 12/27/24 is relied upon. As to claims 1-8, Kawasaki discloses a curable (crosslinkable) fluoroelastomer composition (see abstract and examples) comprising A polyhydroxy curable fluoroelastomer (polyol-crosslinkable fluoroelastomer, see paragraph 17, 20-29 and examples). A curing agent, specifically PNG media_image1.png 146 192 media_image1.png Greyscale , wherein X1 is perfluoroalkyl of 1 to 5 carbons (C1-5 alkyl fully fluorinated), fluoroalkyl of 1 to 5 carbons (C1-5 alkyl partially fluorinated), perfluoroalkoxy of 1 to 5 carbons (C1-5 alkoxy fully fluorinated), fluoroalkoxy of 1 to 5 carbons (C1-5 alkoxy partially fluorinated) or fluorine. See paragraph 43, all the above cited reading on the groups of the Markush group. Specifically, see the examples, wherein the compound is 5-fluororesorcinol (paragraph 244) reading on claimed formula 1, wherein R1=R5=R3=H, R2=OH and R4=F. Also see 4-fluororesorcinol that also reads on the instant claims. An acid acceptor. See paragraph 63-37. Again, see examples 1-6, which read on the instant claims. As to claim 15, the curing agent is utilized in e.g. 0.8 parts per 100 parts fluoroelastomer in the examples. As to claim 16, the fluoroelastomer is exemplified as a copolymer of vinylidene fluoride and hexafluoropropylene. As to claim 17, the fluoroelastomer is a terpolymer tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and vinylidene fluoride (VdF). See paragraph 26 and 38-40. As to claim 18, the acid acceptor is calcium hydroxide. See paragraph 68-71 and examples. As to claim 19, the composition does not require 2,2-bis(4-hydroxyphenyl)hexafluoropropane additive, and therefore is free of it. See examples that do not contain any. As to claim 20, the composition comprises a crosslinking (curing) accelerator. See paragraph 62-66 and examples. As to claim 21, the curing accelerator is in the form of a pre-reacted salt with a portion of the curing agent. See paragraph 58-62 and examples. As to claim 22, see table 1, for example, example 1 utilizes 0.6 parts of crosslinking accelerator B (molecular weight of 388) and 0.8 parts of crosslinking agent A (molecular weight 128). Converting to moles, this equates to be 0.0015 accelerator and 0.006 agent, which is a fourfold (6/1.5=4) molar excess. Allowable Subject Matter Claims 9-14 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Note that claims 12 and 13 are interpreted as requiring X, since n is 0 and Y is O. The prior art is silent to wherein X is present as claimed in compositions for curing fluoroelastomers. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARK S KAUCHER whose telephone number is (571)270-7340. The examiner can normally be reached M-F 8-6 PM EST. 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, Arrie Lanee Reuther can be reached at (571) 270-7026. 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. /MARK S KAUCHER/Primary Examiner, Art Unit 1764
Read full office action

Prosecution Timeline

Mar 12, 2024
Application Filed
Aug 10, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

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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
72%
Grant Probability
86%
With Interview (+14.0%)
2y 9m (~2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1013 resolved cases by this examiner. Grant probability derived from career allowance rate.

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