Prosecution Insights
Last updated: May 29, 2026
Application No. 18/278,947

UNSYMMETRICAL N-HETEROCYCLIC CARBENE CATALYSTS AND METHODS USING SAME

Non-Final OA §102§103
Filed
Aug 25, 2023
Priority
Mar 01, 2021 — provisional 63/154,948 +2 more
Examiner
HUI, SAN MING R
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Rutgers The State University Of New Jersey
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
2m
Est. Remaining
79%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allowance Rate
763 granted / 1293 resolved
-1.0% vs TC avg
Strong +20% interview lift
Without
With
+20.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
37 currently pending
Career history
1343
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
58.9%
+18.9% vs TC avg
§102
5.8%
-34.2% vs TC avg
§112
9.2%
-30.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1293 resolved cases

Office Action

§102 §103
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 without traverse of the specie, PNG media_image1.png 172 306 media_image1.png Greyscale in the reply filed on 3/16/2026 is acknowledged. As the elected specie is found to be free of art, the search has been extended to the compound, 1-benzyl-3-(2,6-diisopropylphenyl)-4,5-dimethyl-imidazol-2-ylidene silver(I) bromide. Claims 1, 2, 7, 8, 10, 15, 16, 17, 20, 29-31, 39, 41 read on the selected specie, 1-benzyl-3-(2,4,6-trimethylphenyl)-imidazol-2-ylidene silver(I) chloride. Claims 44, 45, 52, 53, 57, and 61 are withdrawn as they are directed to non-elected specie. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1, 2, 7, 8, 10, 15, 29 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Bouhraraet al., Dalton Trans., 2011, 40, 2995-2999. Bouhraraet et al. teaches 1-benzyl-3-(2,4,6-trimethylphenyl)-imidazol-2-ylidene silver(I) chloride as compound 2-Ag (see page 2995, col. 2, Scheme 1). Bouhraraet et al. also teaches the intermolecule addition of water and alcohol to an alkynes can be enhanced using catalytic systems containing Hg, Pt, Ag, Ir, and Au (see page 2995, col. 1, first paragraph). Claim Rejections - 35 USC § 103 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. Claim(s) 30 and 31 is/are rejected under 35 U.S.C. 103 as being unpatentable over Bouhraraet al. Bouhraraet et al. teaches 1-benzyl-3-(2,4,6-trimethylphenyl)-imidazol-2-ylidene silver(I) chloride as compound 2-Ag (see page 2995, col. 2, Scheme 1). Bouhraraet et al. also teaches the intermolecule addition of water and alcohol to an alkynes can be enhanced using catalytic systems containing Hg, Pt, Ag, Ir, and Au (see page 2995, col. 1, first paragraph). Bouhraraet al. teaches the use of gold (I) compound for reaction: PNG media_image2.png 183 945 media_image2.png Greyscale (see page 2995, col. 2) The Lewis acid used as AgSbF6, solvent as 1,40dioxane and the ratio with water as 2:1. Bouhraraet al. does not expressly teach the use of Silver compound. It would have been obvious to one of ordinary skill in the art at the time of filing to use the 2-Ag compound instead of the gold compound for the reaction. One of ordinary skill in the art would have been motivated to use the 2-Ag compound instead of the gold compound for the reaction. It is known in the art that silver or gold system as useful as catalyst for addition water molecules to an alkyne compound, according to Bouhraraet al. Therefore, using 2-Ag instead of 2-Au compound in the catalytic reaction would be reasonably expected to be useful. Allowable Subject Matter Claims 16, 17, 20, 39, 41 are 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to SAN MING R HUI whose telephone number is (571)272-0626. The examiner can normally be reached Mon - Fri 9:30-5:30. 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, Kortney Klinkel can be reached at 571-270-5239. 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. /SAN MING R HUI/Primary Examiner, Art Unit 1627
Read full office action

Prosecution Timeline

Aug 25, 2023
Application Filed
Apr 29, 2026
Non-Final Rejection mailed — §102, §103 (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
59%
Grant Probability
79%
With Interview (+20.0%)
2y 11m (~2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1293 resolved cases by this examiner. Grant probability derived from career allowance rate.

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