Prosecution Insights
Last updated: April 19, 2026
Application No. 18/864,460

LOW MOLECULAR WEIGHT DISPERSANTS

Non-Final OA §112§DP
Filed
Nov 08, 2024
Examiner
MCAVOY, ELLEN M
Art Unit
1771
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Chevron Oronite Company LLC
OA Round
2 (Non-Final)
73%
Grant Probability
Favorable
2-3
OA Rounds
2y 6m
To Grant
82%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allow Rate
880 granted / 1209 resolved
+7.8% vs TC avg
Moderate +9% lift
Without
With
+8.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
21 currently pending
Career history
1230
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
58.9%
+18.9% vs TC avg
§102
4.7%
-35.3% vs TC avg
§112
14.6%
-25.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1209 resolved cases

Office Action

§112 §DP
DETAILED ACTION This is in response to the claim amendments and arguments filed 01 December 2025. Claims 1-20 are pending. The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 7 recites the limitation "Z is oxygen" in Claim 1. There is insufficient antecedent basis for this limitation in the claim since Claim 1 has been amended to delete Z is oxygen. Claim 14 recites the limitation "Z is oxygen" in Claim 8. There is insufficient antecedent basis for this limitation in the claim since Claim 8 has been amended to delete Z is oxygen. Claim 20 recites the limitation "Z is oxygen" in Claim 15. There is insufficient antecedent basis for this limitation in the claim since Claim 8 has been amended to delete Z is oxygen. Claim 7 recites the limitation “m is 0 to 3” in Claim 1. There is insufficient antecedent basis for this limitation in the claim since Claim 1 has been amended to “m is 1 to 3”. Claim 14 recites the limitation “m is 0 to 3” in Claim 8. There is insufficient antecedent basis for this limitation in the claim since Claim 8 has been amended to “m is 1 to 3”. Claim 20 recites the limitation “m is 0 to 3” in Claim 15. There is insufficient antecedent basis for this limitation in the claim since Claim 15 has been amended to “m is 1 to 3”. 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. Claims 1-20 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-39 of copending Application No. 18/864,474. Although the claims at issue are not identical, they are not patentably distinct from each other because the copending claims are drawn to lubricating oil compositions and methods of lubricating an engine with a major amount of base oil and the exact same lubricant additive as recited in these claims. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ELLEN M MCAVOY whose telephone number is (571)272-1451. The examiner can normally be reached Monday-Friday 9:30am - 7:00 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, PREM SINGH can be reached at (571) 272-6381. 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. /ELLEN M MCAVOY/ Primary Examiner, Art Unit 1771 EMcAvoy March 5, 2026
Read full office action

Prosecution Timeline

Nov 08, 2024
Application Filed
Jul 28, 2025
Non-Final Rejection — §112, §DP
Dec 01, 2025
Response Filed
Mar 05, 2026
Non-Final Rejection — §112, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599884
CIRCULATING FLUIDIZED BED REACTOR USING ELECTRIC HEATING FURNACE
2y 5m to grant Granted Apr 14, 2026
Patent 12600917
LUBRICATING OIL ADDITIVE COMPOSITION AND LUBRICATING OIL COMPOSITION
2y 5m to grant Granted Apr 14, 2026
Patent 12590253
LOW CARBON FOOTPRINT INTEGRATED PROCESS FOR RECYCLE CONTENT OLEFIN PRODUCERS
2y 5m to grant Granted Mar 31, 2026
Patent 12577493
BIO-BASED LUBRICANT COMPOSITIONS
2y 5m to grant Granted Mar 17, 2026
Patent 12577491
BASE OIL AND LUBRICATING FLUID COMPOSITION CONTAINING SAID BASE OIL
2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
73%
Grant Probability
82%
With Interview (+8.9%)
2y 6m
Median Time to Grant
Moderate
PTA Risk
Based on 1209 resolved cases by this examiner. Grant probability derived from career allow rate.

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