Prosecution Insights
Last updated: July 05, 2026
Application No. 18/558,332

ENHANCED PRODUCTION OF LIGHTLY BRANCHED OLEFIN OLIGOMERS THROUGH OLEFIN OLIGOMERIZATION

Final Rejection §112
Filed
Oct 31, 2023
Priority
May 07, 2021 — provisional 63/185,903 +1 more
Examiner
CEPLUCH, ALYSSA L
Art Unit
1772
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Exxon Mobil Corporation
OA Round
3 (Final)
62%
Grant Probability
Moderate
4-5
OA Rounds
0m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 62% of resolved cases
62%
Career Allowance Rate
316 granted / 508 resolved
-2.8% vs TC avg
Strong +25% interview lift
Without
With
+25.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
45 currently pending
Career history
566
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
89.0%
+49.0% vs TC avg
§102
1.4%
-38.6% vs TC avg
§112
4.9%
-35.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 508 resolved cases

Office Action

§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 . Claim Status Claims 20, 23, 27, and 31 are amended. Claims 32 and 33 are new. Claims 20-33 are pending for examination below. Response to Arguments Applicant’s arguments, see Remarks, filed 02 February 2026, with respect to the rejection(s) of claims 20-31 under USC 103 over have been fully considered and are persuasive. Li does not teach that the WHSV in the first parallel reactor is greater than the WHSV of the second reactor or provide motivation to adjust the reactors to different WHSV. Therefore, the rejection has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of a new 112(a) rejection caused by the amendments. 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 20-33 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. With regard to claim 20, the claim recites “wherein the WHSV over the first reactor is greater than the WHSV of the second reactor”. This recitation is new matter. Applicant cites paragraphs [0227] and [0235] of the Pre Grant Publication (PGPub) as support for the new limitations in claims 20, 32, and 33. While paragraphs [0227] and [0235] of the PGPub do provide support for the specific WHSV ranges in new claims 32 and 33, the instant specification does not provide support for the broader limitation in claim 20 that the WHSV in the first reactor is greater than the second reactor. The WHSV ranges in paragraphs [0227] and [0235] overlap in the range from 16 to 20 hr-1. Upon review of the instant specification, the Examiner can find no other support for the concept of the WHSV in the first reactor being higher than in the second reactor. While the WHSV is discussed in various places, including specification as filed paragraph [0090] with respect to the WHSV of the TON catalyst and the MTT catalyst, there is no recitation that the WHSV in the first reactor comprising a MTT catalyst can or must be higher than the WHSV in the second reactor comprising the MFI catalyst, as claimed. Thus, the limitation is not supported and is new matter. With regard to claims 21-33, the claims are rejected as being dependent on a rejected base claim. 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 nonprovisional extension fee (37 CFR 1.17(a)) 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 mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ALYSSA L CEPLUCH whose telephone number is (571)270-5752. The examiner can normally be reached M-F, 8:30 am-5 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, 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. /Alyssa L Cepluch/Examiner, Art Unit 1772 /Renee Robinson/Primary Examiner, Art Unit 1772
Read full office action

Prosecution Timeline

Oct 31, 2023
Application Filed
Jun 10, 2025
Non-Final Rejection mailed — §112
Jun 17, 2025
Response Filed
Nov 05, 2025
Non-Final Rejection mailed — §112
Feb 02, 2026
Response Filed
Jun 02, 2026
Final Rejection mailed — §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

4-5
Expected OA Rounds
62%
Grant Probability
88%
With Interview (+25.3%)
2y 8m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 508 resolved cases by this examiner. Grant probability derived from career allowance rate.

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