Prosecution Insights
Last updated: October 02, 2026
Application No. 18/591,526

SYSTEMS FOR HEAT PRESERVATION DURING HYDROGENATION AND DEHYDROGENATION

Non-Final OA §103§112
Filed
Feb 29, 2024
Priority
Mar 01, 2023 — provisional 63/449,156
Examiner
HENDRICKSON, STUART L
Art Unit
Tech Center
Assignee
Chevron U.s.a. Inc.
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
6m
Est. Remaining
80%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
725 granted / 1003 resolved
+12.3% vs TC avg
Moderate +8% lift
Without
With
+8.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
33 currently pending
Career history
1024
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
43.5%
+3.5% vs TC avg
§102
15.0%
-25.0% vs TC avg
§112
27.2%
-12.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1003 resolved cases

Office Action

§103 §112
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 . The election is noted. Claims 14-22 are withdrawn. Due to the species election, claims 4, and 9-11 are also withdrawn. However, applicants should be mindful of the totality of teachings of the below-cited references. Normally successive amendments ae not permitted, however the rule is waived on this occasion, noting that the second submission was still within the original time period set for response. 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. Claims 5 and 6 are 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 5 is unclear as to when and how hydrogenation is done, and what the heat requirements are. Claim 6 is unclear as to whether the change is between runs or during the process. If the latter, then it is unclear how it is accomplished. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 1-3, 5-8, 12, 13 are rejected under 35 U.S.C. 103 as being unpatentable over Seo et al. 20220255101 taken with Burcher et al. 20210017021. Seo teaches, especially in paras 12-21 and 51 and fig. 1, exothermic and endothermic H carriers. The endothermic dehydrogenation agent is organic liquid. The elected siloxane is not taught by Seo, however Burcher does in para 67 in a similar system. Using it in the process of Seo is obvious to provide a hydrogen carrier. For clams 2 and 3, methylcyclohexane is taught in Seo para 17. For claim 5, Seo para 48 teaches initiation of the cycle without adding heat. For claim 6, in so far as dehydrogenation of a H2 adduct reduces the amount thereof (‘adjusted’), option ii is merely a mathematical restatement of what is already required in/implied by claim 1. See also the above rejection under ‘112. For claims 7 and 8, see Burcher para 67. For claim 12, para 57 teaches controlling the reaction rate. For clam 13, para 51 teaches connecting the chambers, suggesting a common wall. The following is noted: Lin ‘419 teaches in para 208 dodecahydroethylcarbozole in a similar system. Any inquiry concerning this communication or earlier communications from the examiner should be directed to STUART L HENDRICKSON whose telephone number is (571)272-1351. The examiner can normally be reached on Monday-Friday from 9 to 5. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Anthony Zimmer, can be reached on 571-270-3591. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. /STUART L HENDRICKSON/Primary Examiner, Art Unit 1736
Read full office action

Prosecution Timeline

Feb 29, 2024
Application Filed
Jul 14, 2026
Response after Non-Final Action
Aug 24, 2026
Non-Final Rejection mailed — §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

1-2
Expected OA Rounds
72%
Grant Probability
80%
With Interview (+8.0%)
3y 1m (~6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1003 resolved cases by this examiner. Grant probability derived from career allowance rate.

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