Prosecution Insights
Last updated: October 25, 2026
Application No. 18/324,521

PHOTODRIVEN TRANSFER HYDROGENATION OF N2 TO NH3

Non-Final OA §112
Filed
May 26, 2023
Priority
May 27, 2022 — provisional 63/346,423
Examiner
TAI, XIUYU
Art Unit
Tech Center
Assignee
California Institute of Technology
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allowance Rate
606 granted / 1034 resolved
-1.4% vs TC avg
Strong +50% interview lift
Without
With
+49.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
43 currently pending
Career history
1066
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
45.4%
+5.4% vs TC avg
§102
15.4%
-24.6% vs TC avg
§112
30.4%
-9.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1034 resolved cases

Office Action

§112
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 . Election/Restrictions Applicant’s election of Species A1. B3. And C3, encompassing claims 1-2, 9, 17-18, 62-64, 70, and 76, in the reply filed on 8/25/2026 is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). 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. Claims 1-2, 9, 17-18, 62-64, 70, and 76 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 1 recites the limitation of “one or more other chemical species”. It is not clear this limitation is regarded. Is “one or more other chemical species” for one or more intermediate products or any by-products generated by hydrogenation of nitrogen or for any other chemical species that is totally unrelated to hydronation of nitrogen? Without clarifying “one or more other chemical species”, one having ordinary skill in the art would not have known how to perform the claimed method. Appropriate correction/clarification is required. Claim 63 recites the limitation of “the transfer agent donating at least one electron and at least one proton”. The claim does not specify where the at least one electron and at least one proton from the transfer agent are donated to. Without specific donating location/site, one having ordinary skill in the art would not have known how to perform the claimed method. Appropriate correction/clarification is required. Claim 76 recites the limitation of “a starting chemical species” in line 3. There is insufficient antecedent basis for this limitation in the claim. For the purpose of examination, the above limitation will be interpreted as “the starting chemical species”. Furthermore, the claim does not clearly define what “a starting chemical species” is referred. It appears from the claim language that any kind of chemical species could be used as “a starting chemical species” and the claimed invention could be performed on any kind of chemical species for photodriven hydrogenation. It should be noted that the instant specification discloses in paragraph [0207] (or paragraph [0298] of PGPUB) that certain kinds of starting chemical species can be used to perform the claimed invention. That is, the claimed invention is broader than what is disclosed. Therefore, one having ordinary skill in the art would not be able to draw a clear boundary between what is and is not covered by the claim. Claim 76 recites the limitation of “one or more other chemical species”. It is not clear this limitation is regarded. Is “one or more other chemical species” for one or more intermediate products or any by-products generated by hydrogenation of nitrogen or for any other chemical species that is totally unrelated to hydronation of nitrogen? Without clarifying “one or more other chemical species”, one having ordinary skill in the art would not have known how to perform the claimed method. Appropriate correction/clarification is required. Due to the dependency to the parent claim, claims 2, 9, 17-18, 62, 64, and 70 are rejected. Conclusion Claims 1-2, 9, 17-18, 62-64, 70, and 76 are rejected. Claims 3-5, 11-16, and 65-66 are withdrawn. Any inquiry concerning this communication or earlier communications from the examiner should be directed to XIUYU TAI whose telephone number is (571)270-1855. The examiner can normally be reached Mon.-Fri. 9:00-5:00. 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, Luan Van can be reached at 571-272-8521. 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. /XIUYU TAI/Primary Examiner, Art Unit 1795
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Prosecution Timeline

May 26, 2023
Application Filed
Oct 09, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

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4y 3m to grant Granted Oct 06, 2026
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
59%
Grant Probability
99%
With Interview (+49.5%)
3y 3m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1034 resolved cases by this examiner. Grant probability derived from career allowance rate.

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