Prosecution Insights
Last updated: July 17, 2026
Application No. 18/836,470

METHOD OF DECOMPOSING CROSSLINKED RUBBER

Non-Final OA §DP
Filed
Aug 07, 2024
Priority
Feb 08, 2022 — JP 2022-018304 +1 more
Examiner
FADHEL, ALI Z
Art Unit
1772
Tech Center
1700 — Chemical & Materials Engineering
Assignee
National Institute of Advanced Industrial Science and Technology
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
5m
Est. Remaining
85%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
373 granted / 489 resolved
+11.3% vs TC avg
Moderate +9% lift
Without
With
+9.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
25 currently pending
Career history
505
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
72.3%
+32.3% vs TC avg
§102
6.5%
-33.5% vs TC avg
§112
8.1%
-31.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 489 resolved cases

Office Action

§DP
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 . Information Disclosure Statement The information disclosure statements (IDS) submitted on 08/07/2024, 09/05/2024, and 10/08/2025 have been considered by the Examiner. Status of Claims Claims 1-20, filed on 08/07/2024, are under consideration. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. The claims are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over the claims of copending Application No. 18/835,542 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because reference application discloses the same limitations as does the instant application except the temperature range for the second decomposition step is different. However, it is the position of the examiner that temperature is a result effective variable and as such can be optimized without undue experimentation. Discovery of optimum value of result effective variable in known process is ordinarily within the skill in the art and would have been obvious. Also, the reference application heats to 600-950°C in the second step which also includes heating to the instantly claimed lower temperatures of 300-450°C. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Also, the claims are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over the claims of copending Application No. 19/507,675 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because both sets of claims include decomposition of diene rubber over Grubs-type metathesis catalysts, followed by thermal decomposition in absence of catalyst. The reference application uses 450-950 °C in the second step which touches the instant claimed temperatures of 300-450°C and establish a prima facie case of obviousness. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter The following is a statement of reasons for the indication of allowable subject matter: no prior art was located to teach or suggest the claimed steps of decomposition of diene rubber over Grubs-type metathesis catalysts, followed by thermal decomposition in absence of catalyst at temperatures of 300-450°C. US 11,203,679 and US 9,593,168 teach decomposing nitrile rubber with Ru/Os-carbene metathesis catalysts. However, no reference was found to decompose the product from metathesis decomposition of rubber under the claimed conditions of the second decomposition step. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ALI Z FADHEL whose telephone number is (571)270-0267. The examiner can normally be reached M-F 9am-6pm PST. 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, In Suk Bullock can be reached at 571-272-5954. 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. /ALI Z FADHEL/Primary Examiner, Art Unit 1772
Read full office action

Prosecution Timeline

Aug 07, 2024
Application Filed
Jun 24, 2026
Non-Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12679788
STABLE PRODUCT OLIGOMER SELECTIVITY FROM OLEFIN OLIGOMERIZATION ON ZSM-5 ZEOLITES AND ZEOTYPES
2y 5m to grant Granted Jul 14, 2026
Patent 12673875
Method of Synthesizing a Molecular Sieve of MWW Framework Type
2y 11m to grant Granted Jul 07, 2026
Patent 12668556
CATALYSTS AND METHODS FOR METHANE DEHYDROGENATION
2y 11m to grant Granted Jun 30, 2026
Patent 12662435
OLEFIN PRODUCTION DEVICE AND OLEFIN PRODUCTION METHOD
2y 9m to grant Granted Jun 23, 2026
Patent 12662434
Direct Conversion of Methane to C2 and Higher Hydrocarbons
2y 9m to grant Granted Jun 23, 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

1-2
Expected OA Rounds
76%
Grant Probability
85%
With Interview (+9.0%)
2y 4m (~5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 489 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