Prosecution Insights
Last updated: May 29, 2026
Application No. 18/990,889

Novel CRISPR-Cas delta enzyme and system

Non-Final OA §112
Filed
Dec 20, 2024
Priority
Sep 04, 2023 — CN 202311130084.6 +1 more
Examiner
FRONDA, CHRISTIAN L
Art Unit
1652
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
China Agricultural University
OA Round
1 (Non-Final)
82%
Grant Probability
Favorable
1-2
OA Rounds
11m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
1104 granted / 1339 resolved
+22.4% vs TC avg
Moderate +14% lift
Without
With
+14.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
40 currently pending
Career history
1382
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
28.2%
-11.8% vs TC avg
§102
7.4%
-32.6% vs TC avg
§112
23.0%
-17.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1339 resolved cases

Office Action

§112
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claims 1, 7-18, 20-25, 28-32 are pending in the instant application. Applicant's election with traverse of Group I (Invention I) in the reply filed on 11/11/2025 is acknowledged. The arguments filed have been considered but are not found persuasive. Restriction for examination purposes as indicated is proper because all of the inventions listed in the previous action are independent or distinct for the reasons of record and there would be a serious search and examination burden if restriction were not required because one or more of the following reasons apply: (a) the inventions have acquired a separate status in the art in view of their different classification; (b) the inventions have acquired a separate status in the art due to their recognized divergent subject matter; and (c) the inventions require a different field of search (for example, searching different classes/subclasses or electronic resources, or employing different search queries). Upon further consideration, the species restriction requirement has been withdrawn. Claims 9-11, 14, 20-25, 28-32 are withdrawn from further consideration pursuant to 37 CFR 1.142(b), as being drawn to a nonelected invention. The requirement is still deemed proper and is therefore made FINAL. Claims 1, 7, 8, 12, 13, 15-18 and SEQ ID NOs: 1-3 are under consideration in this Office Action. Title The title of the invention is not descriptive. A new title is required that is clearly indicative of the invention to which the claims are directed. Claim Rejections - 35 USC § 112(b) or 35 U.S.C. 112 (pre-AIA ) 2nd Paragraph 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 7, 8, 13 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 pre-AIA the applicant regards as the invention. Claim 7 recites the phrase “characterized by one or more of the following” which renders the claim vague and indefinite since it is unclear if the fusion protein comprising any of the components recited in (1)–(4) by recitation of “characterized by”. Claim 8 recites the phrase “characterized by one or more of the following” which renders the claim vague and indefinite since it is unclear if the fusion protein comprising any of the components recited in (1)–(3) by recitation of “characterized by”. Claim 13 recites the phrase “characterized by one or more of the following” which renders the claim vague and indefinite since it is unclear if the fusion protein comprising any of the components recited in (1)–(3) by recitation of “characterized by”. Conclusion Claims 1, 12, 15-18 are allowed. The closest prior art for the recited protein comprising the amino acid sequence of SEQ ID NO: 1 is the reference of Accession BGY87753 (26-DEC-2019; PTO 892) which teaches the Cas12h.2 protein having an amino acid sequence that has 19.3% identity to SEQ ID NO: 1 (see attached record). The closest prior art for the recited protein comprising the amino acid sequence of SEQ ID NO: 2 is the reference of Accession BGY87826 (26-DEC-2019; PTO 892) which teaches a protein having an amino acid sequence that has 21.0% identity to SEQ ID NO: 2 (see attached record). The closest prior art for the recited protein comprising the amino acid sequence of SEQ ID NO: 3 is the reference of Accession BOJ69197 (08-FEB-2024; PTO 892) which teaches anti-CRISPR (Acr) polypeptide having an amino acid sequence that has 19.2% identity to SEQ ID NO: 3 (see attached record). Any inquiry concerning this communication or earlier communications from the examiner should be directed to Christian L Fronda whose telephone number is (571)272 0929. The examiner can normally be reached Monday-Thursday and alternate Fridays between 9:00AM-5:00PM. 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, Robert Mondesi can be reached on (408)918-7584. 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. /CHRISTIAN L FRONDA/Primary Examiner, Art Unit 1652
Read full office action

Prosecution Timeline

Dec 20, 2024
Application Filed
Dec 30, 2025
Non-Final Rejection mailed — §112
Jan 16, 2026
Response Filed
Apr 03, 2026
Response after Non-Final Action
Apr 29, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12637680
RECOMBINANT HOST CELLS FOR THE PRODUCTION OF MALONATE
4y 3m to grant Granted May 26, 2026
Patent 12618087
Thraustochytrid strain genetically engineered for the production of biomaterials including docosahexaenoic acid
3y 3m to grant Granted May 05, 2026
Patent 12612591
INTEGRATED SYSTEM FOR BIOCATALYTICALLY PRODUCING AND RECOVERING AN ORGANIC SUBSTANCE
4y 3m to grant Granted Apr 28, 2026
Patent 12600991
GENETICALLY MODIFIED MICROORGANISM FOR PRODUCTION OF ASPARTIC ACID AND DOWNSTREAM METABOLITES FROM ASPARTIC ACID AS TARGET SUBSTANCE, AND METHOD FOR PRODUCING TARGET SUBSTANCE USING SAME
4y 5m to grant Granted Apr 14, 2026
Patent 12584097
FOAM CONTROL AGENTS FOR FERMENTATION
3y 3m to grant Granted Mar 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
82%
Grant Probability
96%
With Interview (+14.1%)
2y 5m (~11m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1339 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month