Prosecution Insights
Last updated: April 19, 2026
Application No. 18/250,245

Non-Aromatic Hydrocarbon Soluble Olefin Polymerization Catalysts and Use Thereof

Final Rejection §112
Filed
Apr 24, 2023
Examiner
BRANCH, CATHERINE S
Art Unit
1763
Tech Center
1700 — Chemical & Materials Engineering
Assignee
ExxonMobil
OA Round
2 (Final)
85%
Grant Probability
Favorable
3-4
OA Rounds
2y 6m
To Grant
89%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allow Rate
803 granted / 941 resolved
+20.3% vs TC avg
Minimal +4% lift
Without
With
+3.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
27 currently pending
Career history
968
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
40.3%
+0.3% vs TC avg
§102
21.0%
-19.0% vs TC avg
§112
29.8%
-10.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 941 resolved cases

Office Action

§112
DETAILED ACTION This communication responds to the Amendment filed February 27, 2026. Claims 1-10 and 12-20 are currently pending. The rejections of claims 1-8, 10, and 12-20 under 35 USC 112 set forth in the Office Action dated December 3, 2025 are MAINTAINED for the reasons set forth below. Otherwise, claims 1-8, 10, and 12-20 contain allowable subject matter. Claim 9 is OBJECTED TO as depending from a rejected claim, but otherwise contains allowable subject matter. This action is final. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. Claims 1-8, 10, 12-20 are rejected under 35 U.S.C. 112(b) as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. Regarding claim 1, the phrase “such as” in the limitation defining X renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. (See MPEP 2173.05(d).) Claims 2-8, 10, and 12-20 contain all of the limitations of claim 1 and do not correct its deficiencies. Therefore, they are indefinite for the reason claim 1 is indefinite. Allowable Subject Matter Claims 1-8, 10, and 12-20 would be allowable if rewritten or amended to overcome the rejections under 35 U.S.C. 112(b) set forth in this Office action. Claim 9 is 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. The following is a statement of reasons for the indication of allowable subject matter: Claims 1-10 and 12-20 contain allowable subject matter for the reasons set forth in the December 3 Office Action at paragraph 30, which is incorporated by reference herein. Conclusion THIS ACTION IS MADE FINAL. 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 CATHERINE S BRANCH whose telephone number is (571)270-3539. The examiner can normally be reached Monday through Friday. 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 at 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 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. CATHERINE S. BRANCH Primary Examiner Art Unit 1763 /CATHERINE S BRANCH/Primary Examiner, Art Unit 1763
Read full office action

Prosecution Timeline

Apr 24, 2023
Application Filed
Nov 12, 2025
Non-Final Rejection — §112
Feb 27, 2026
Response Filed
Mar 16, 2026
Final Rejection — §112 (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

3-4
Expected OA Rounds
85%
Grant Probability
89%
With Interview (+3.6%)
2y 6m
Median Time to Grant
Moderate
PTA Risk
Based on 941 resolved cases by this examiner. Grant probability derived from career allow rate.

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