Prosecution Insights
Last updated: April 19, 2026
Application No. 17/777,184

CURED RUBBER NETWORK WITH COVALENT AND HYDROGEN-BONDED CROSSLINKS

Final Rejection §102
Filed
May 16, 2022
Examiner
EGWIM, KELECHI CHIDI
Art Unit
1762
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Bridgestone Corporation
OA Round
2 (Final)
70%
Grant Probability
Favorable
3-4
OA Rounds
3y 1m
To Grant
84%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allow Rate
551 granted / 789 resolved
+4.8% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
46 currently pending
Career history
835
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
27.9%
-12.1% vs TC avg
§102
45.9%
+5.9% vs TC avg
§112
19.2%
-20.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 789 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 . Election/Restriction REQUIREMENT FOR UNITY OF INVENTION As provided in 37 CFR 1.475(a), a national stage application shall relate to one invention only or to a group of inventions so linked as to form a single general inventive concept (“requirement of unity of invention”). Where a group of inventions is claimed in a national stage application, the requirement of unity of invention shall be fulfilled only when there is a technical relationship among those inventions involving one or more of the same or corresponding special technical features. The expression “special technical features” shall mean those technical features that define a contribution which each of the claimed inventions, considered as a whole, makes over the prior art. The determination whether a group of inventions is so linked as to form a single general inventive concept shall be made without regard to whether the inventions are claimed in separate claims or as alternatives within a single claim. See 37 CFR 1.475(e). When Claims Are Directed to Multiple Categories of Inventions: As provided in 37 CFR 1.475 (b), a national stage application containing claims to different categories of invention will be considered to have unity of invention if the claims are drawn only to one of the following combinations of categories: (1) A product and a process specially adapted for the manufacture of said product; or (2) A product and a process of use of said product; or (3) A product, a process specially adapted for the manufacture of the said product, and a use of the said product; or (4) A process and an apparatus or means specifically designed for carrying out the said process; or (5) A product, a process specially adapted for the manufacture of the said product, and an apparatus or means specifically designed for carrying out the said process. Otherwise, unity of invention might not be present. See 37 CFR 1.475 (c). Restriction is required under 35 U.S.C. 121 and 372. This application contains the following inventions or groups of inventions which are not so linked as to form a single general inventive concept under PCT Rule 13.1. In accordance with 37 CFR 1.499, applicant is required, in reply to this action, to elect a single invention to which the claims must be restricted. Group I, claim(s) 1-5, drawn to a vulcanizate composition. Group II claim(s) 6-13, drawn to a method for forming a functionalized elastomeric polymer. Group III, claim(s) 16-22, drawn to a method for preparing a vulcanizate. The groups of inventions listed above do not relate to a single general inventive concept under PCT Rule 13.1 because, under PCT Rule 13.2, they lack the same or corresponding special technical features for the following reasons: Groups I-III lack unity of invention because even though the inventions of these groups require the technical feature of the vulcanizate, this technical feature is not a special technical feature as it does not make a contribution over the prior art in view of Luo et al., “Toughening diene elastomers by strong hydrogen bond interactions” ,Polymer, 2016, Vol. 106, pages 21-28 and CN 104194353. During a telephone conversation with Yiou Wang on, a provisional election was made 5/16/25 traverse to prosecute the invention of Group II, claims 6-13. Affirmation of this election must be made by applicant in replying to this Office action. Claims 1-5 and 16-22 are withdrawn from further consideration by the examiner, 37 CFR 1.142(b), as being drawn to a non-elected invention. Applicant is reminded that upon the cancelation of claims to a non-elected invention, the inventorship must be corrected in compliance with 37 CFR 1.48(a) if one or more of the currently named inventors is no longer an inventor of at least one claim remaining in the application. A request to correct inventorship under 37 CFR 1.48(a) must be accompanied by an application data sheet in accordance with 37 CFR 1.76 that identifies each inventor by his or her legal name and by the processing fee required under 37 CFR 1.17(i). 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. Claim(s) 6-13 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Cao et al. (CN 104194353). In the abstract, Cao et al. teach combining an elastomeric polyisoprene polymer and 6-mehtyl isocytosine, which includes a group to form a covalent bond with the elastomeric polymer, and a moiety that is capable of forming a hydrogen bond, in solution and isolating the functionalized elastomer. Thus, the requirements for rejection under 35 U.S.C. 102(a)(1) are met. Claim(s) 6-13 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Luo et al., “Toughening diene elastomers by strong hydrogen bond interactions”, Polymer, 2016, Vol. 106, pages 21-28. In the abstract, Luo et al. teach combining an elastomeric polyisoprene polymer and a 2-ureido-4[1H]-pyrimidinone compound, which includes a group to form a covalent bond with the elastomeric polymer, and a moiety that is capable of forming a hydrogen bond, in solution and isolating the functionalized elastomer. Thus, the requirements for rejection under 35 U.S.C. 102(a)(1) are met. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KELECHI CHIDI EGWIM whose telephone number is (571)272-1099. The examiner can normally be reached M-Th 9-7. 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, Gwendolyn Blackwell can be reached at (571) 272-5772. 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. /KELECHI C EGWIM/Primary Examiner, Art Unit 1762 KCE
Read full office action

Prosecution Timeline

May 16, 2022
Application Filed
Jun 11, 2025
Non-Final Rejection — §102
Sep 12, 2025
Response Filed
Dec 18, 2025
Final Rejection — §102 (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

3-4
Expected OA Rounds
70%
Grant Probability
84%
With Interview (+14.0%)
3y 1m
Median Time to Grant
Moderate
PTA Risk
Based on 789 resolved cases by this examiner. Grant probability derived from career allow rate.

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