Prosecution Insights
Last updated: August 16, 2026
Application No. 18/033,950

CURABLE COMPOSITION AND SEALANT

Final Rejection §102§103§112
Filed
Apr 26, 2023
Priority
Oct 28, 2020 — JP 2020-180749 +2 more
Examiner
CAI, WENWEN
Art Unit
1763
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kuraray Co., Ltd.
OA Round
2 (Final)
60%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
80%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allowance Rate
519 granted / 871 resolved
-5.4% vs TC avg
Strong +20% interview lift
Without
With
+19.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
64 currently pending
Career history
938
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
45.0%
+5.0% vs TC avg
§102
17.2%
-22.8% vs TC avg
§112
28.7%
-11.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 871 resolved cases

Office Action

§102 §103 §112
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Election/Restrictions Applicant’s election without traverse of species of a composition of claim 1 in the reply filed on 7/14/2026 is acknowledged. Claim 9 is withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 7/14/2026. Response to Amendment The amendment of claims 1, 4 are supported by the specification. Any rejections and/or objections made in the previous Office action and not repeated below are hereby withdrawn. The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. The new grounds of rejection set forth below are necessitated by applicant's amendment filed on 4/27/2026. Thus, the following action is properly made final. Claim Objections Claim 1 objected to because of the following informalities: “in a side chain” should be “in the side chains” due to inherent antecedent basis. Appropriate correction is required. Claim Rejections - 35 USC § 112 Claims 1-8 rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor, or for pre-AIA the applicant regards as the invention. Claim 4 recites a melt viscosity which heavily depends on measuring temperature and shear rate/frequency. Without citing a shear rate, the claimed viscosity is meaningless from scientific point of view because the claimed range can always be obtained by adjusting shear rate. For purposes of expediting prosecution, any value would read on the claimed range. Claim 1 recites number of moles of double bond which is defined in the specification by a formula related to vinyl content. However, the specification discloses the vinyl content is related to conjugated diene units bonded through 1,13-bond and 3,13 -bond. What are 1,13-bond and 3,13 -bond? The specification discloses “the vinyl content is calculated, using .sup.1H-NMR, from an area ratio of a peak derived from a structural unit derived from a conjugated diene bonded by the 1,2-bond, the 3,4-bond (case other than β-farnesene), and the 3,13-bond (case of β-farnesene) to a peak derived from a structural unit derived from a conjugated diene bonded by the 1,4-bond (case other than β-farnesene) and the 1,13-bond (case of β-farnesene).” It indicates the vinyl content is a ratio between a structure derived from 3,13 bond to a structure derived from 1,13 bond, such a ratio could be a number greater than 1, however, vinyl content should be a value less than 1. Clarification is required. For purposes of expediting prosecution, the limitation is interpreted by its literal meaning. Claim 1 recites “does not include components corresponding to…polymer (A), a solid rubber…” What does it mean? The specification exemplifies the polymer F being another polymer (A). A solid rubber is not required in claim 1, therefore the solid rubber from Kanbara can be interpreted as another solid rubber and therefore read on the claimed polymer (F). Claim Rejections - 35 USC § 102 Claim(s) 1-8 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Kanbara et al (US 2017/0327681). Claims 1-4, 6-8: Kanbara teaches a composition comprising a beta-farnesene homopolymer, a crosslinking agent, a filler, a solid rubber which reads on another polymer, a foaming agent (table 3, examples 3-4, 0097). The polyfarnesene has Mw of 37,000, Mw/Mn of 1.2, Mn of 30833 which equals to 151 degree of polymerization. For polyfarnesene, 1,4-bond results in 2 double bonds in the side chain, other structures have 3 double bonds in the side chain. Therefore, the above polyfarnesene has at least 302 mols of double bonds in the side chain per mole of the polymer. The specification exemplifies the polymer F being another polymer (A). A solid rubber is not required in claim 1, therefore the solid rubber from Kanbara can be interpreted as another solid rubber and therefore read on the claimed polymer (F). Claim 5: Kanbara teaches the crosslinking agent can be sulfur or peroxide [0078]. Claim Rejections - 35 USC § 103 Claims 1-8 is/are rejected under 35 U.S.C. 103 as being unpatentable over Kanbara et al (US 2017/0327681). Claims 1-4, 6-8: Kanbara teaches a composition comprising a beta-farnesene homopolymer, a crosslinking agent, a filler, a solid rubber which reads on another polymer, a foaming agent (table 3, examples 3-4, 0097). The polyfarnesene has Mw of 37,000, Mw/Mn of 1.2, Mn of 30833 which equals to 151 degree of polymerization. For polyfarnesene, 1,4-bond results in 2 double bonds in the side chain, other structures have 3 double bonds in the side chain. Therefore, the above polyfarnesene has at least 302 mols of double bonds in the side chain per mole of the polymer. The farnesene homopolymer can be modified [0059]. Therefore, it would have been obvious to one of ordinary skill in the art at the time the invention was made to recognize a composition comprising both the beta-farnesene homopolymer and the modified polymer, because it is well settled that it is prima facie obvious to combine two ingredients, each of which is targeted by the prior art to be useful for the same purpose. In re Lindner 457 F,2d 506,509, 173 USPQ 356, 359 (CCPA 1972). Claim 5: Kanbara teaches the crosslinking agent can be sulfur or peroxide [0078]. Response to Arguments Applicant's arguments filed have been fully considered but they are not persuasive. In response to applicant's argument regarding claim objection, applicant needs to explain how a single side chain of farnesene polymer can have more than 100 double bonds, and how the vinyl content is related to a single side chain. In response to applicant's argument regarding 112(b) rejection of claim 4, it is noted that the instrument used does not specify temperature and shear rate. In response to applicant's argument regarding unexpected results, it is noted that unexpected results should be demonstrated by experimental data, be compared to the closest prior art, be really unexpected, and be commensurate in scope with the scope of claims. Conclusion 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 WENWEN CAI whose telephone number is (571)270-3590. The examiner can normally be reached on M-F 9am-6pm. 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, 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. /WENWEN CAI/ Primary Examiner, Art Unit 1763
Read full office action

Prosecution Timeline

Apr 26, 2023
Application Filed
Jan 26, 2026
Non-Final Rejection mailed — §102, §103, §112
Apr 27, 2026
Response Filed
Jul 28, 2026
Final Rejection mailed — §102, §103, §112 (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
60%
Grant Probability
80%
With Interview (+19.9%)
3y 2m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 871 resolved cases by this examiner. Grant probability derived from career allowance rate.

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