Prosecution Insights
Last updated: August 17, 2026
Application No. 18/246,087

NOVEL ENHANCED BASE EDITING OR REVISING FUSION PROTEIN AND USE THEREOF

Final Rejection §112
Filed
Mar 21, 2023
Priority
Sep 21, 2020 — RE 10-2020-0121730 +2 more
Examiner
HUMPHRIES, NICHOLAS ADAM
Art Unit
1631
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Korea University Research and Business Foundation
OA Round
2 (Final)
33%
Grant Probability
At Risk
3-4
OA Rounds
3m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants only 33% of cases
33%
Career Allowance Rate
11 granted / 33 resolved
-26.7% vs TC avg
Strong +79% interview lift
Without
With
+78.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
49 currently pending
Career history
84
Total Applications
across all art units

Statute-Specific Performance

§101
3.9%
-36.1% vs TC avg
§103
37.6%
-2.4% vs TC avg
§102
19.1%
-20.9% vs TC avg
§112
28.7%
-11.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 33 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 without traverse of Group 1, claims 1-12, 14-15, and 18 in the reply filed on 08 December 2025 was previously acknowledged. Claims 13 and 16 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 08 December 2025. Claim Status Claims 13 and 16 have been withdrawn, claims 1 and 15 have been amended, claim 17 was previously cancelled, claims 2, 4-10, and 18 are newly canceled, and claims 1, 3, 11-12,14-15, and 18 have been considered on their merits. Nucleotide and/or Amino Acid Sequence Disclosures Summary of Requirements for Patent Applications Filed On Or After July 1, 2022, That Have Sequence Disclosures 37 CFR 1.831(a) requires that patent applications which contain disclosures of nucleotide and/or amino acid sequences that fall within the definitions of 37 CFR 1.831(b) must contain a “Sequence Listing XML”, as a separate part of the disclosure, which presents the nucleotide and/or amino acid sequences and associated information using the symbols and format in accordance with the requirements of 37 CFR 1.831-1.835. This “Sequence Listing XML” part of the disclosure may be submitted: 1. In accordance with 37 CFR 1.831(a) using the symbols and format requirements of 37 CFR 1.832 through 1.834 via the USPTO patent electronic filing system (see Section I.1 of the Legal Framework for Patent Electronic System (https://www.uspto.gov/PatentLegalFramework), hereinafter “Legal Framework”) in XML format, together with an incorporation by reference statement of the material in the XML file in a separate paragraph of the specification (an incorporation by reference paragraph) as required by 37 CFR 1.835(a)(2) or 1.835(b)(2) identifying: a. the name of the XML file b. the date of creation; and c. the size of the XML file in bytes; or 2. In accordance with 37 CFR 1.831(a) using the symbols and format requirements of 37 CFR 1.832 through 1.834 on read-only optical disc(s) as permitted by 37 CFR 1.52(e)(1)(ii), labeled according to 37 CFR 1.52(e)(5), with an incorporation by reference statement of the material in the XML format according to 37 CFR 1.52(e)(8) and 37 CFR 1.835(a)(2) or 1.835(b)(2) in a separate paragraph of the specification identifying: a. the name of the XML file; b. the date of creation; and c. the size of the XML file in bytes. SPECIFIC DEFICIENCIES AND THE REQUIRED RESPONSE TO THIS NOTICE ARE AS FOLLOWS: Specific deficiency - This application fails to comply with the requirements of 37 CFR 1.831-1.834 because it does not contain a “Sequence Listing XML” as a separate part of the disclosure. A “Sequence Listing XML” is required because there are sequences present in the specification and drawings with no corresponding SEQ ID NO. Required response - Applicant must provide: • A “Sequence Listing XML” part of the disclosure, as described above in item 1. or 2.; together with o A statement that indicates the basis for the amendment, with specific references to particular parts of the application as originally filed, as required by 37 CFR 1.835(a)(3); o A statement that the “Sequence Listing XML” includes no new matter as required by 37 CFR 1.835(a)(4) AND • A substitute specification in compliance with 37 CFR 1.52, 1.121(b)(3), and 1.125 inserting the required incorporation by reference paragraph as required by 37 CFR 1.835(a)(2), consisting of: o A copy of the previously-submitted specification, with deletions shown with strikethrough or brackets and insertions shown with underlining (marked-up version); o A copy of the amended specification without markings (clean version); and o A statement that the substitute specification contains no new matter. Specific deficiency - Sequences appearing in the specification are not identified by sequence identifiers (i.e., “SEQ ID NO:X” or the like) in accordance with 37 CFR 1.831(c). Required response – Applicant must provide: A substitute specification in compliance with 37 CFR 1.52, 1.121(b)(3), and 1.125 inserting the required sequence identifiers, consisting of: • A copy of the previously-submitted specification, with deletions shown with strikethrough or brackets and insertions shown with underlining (marked-up version); • A copy of the amended specification without markings (clean version); and • A statement that the substitute specification contains no new matter. Specific deficiency - Sequences appearing in the drawings are not identified by sequence identifiers in accordance with 37 CFR 1.831(c). Sequence identifiers for sequences (i.e., “SEQ ID NO:X” or the like) must appear either in the drawings or in the Brief Description of the Drawings. Required response – Applicant must provide: Amended drawings in accordance with 37 CFR 1.121(d) inserting the required sequence identifiers; AND/OR A substitute specification in compliance with 37 CFR 1.52, 1.121(b)(3), and 1.125 inserting the required sequence identifiers (i.e., “SEQ ID NO:X” or the like) into the Brief Description of the Drawings, consisting of: • A copy of the previously-submitted specification, with deletions shown with strikethrough or brackets and insertions shown with underlining (marked-up version); • A copy of the amended specification without markings (clean version); and • A statement that the substitute specification contains no new matter. Withdrawn Objection/Rejections The claim objections have been withdrawn because Applicant canceled the objected claim. The claim rejections under 35 U.S.C. 112(a) have been withdrawn due to Applicant’s amendments to the claims. The claim rejections under 35 U.S.C. 112(b) have been withdrawn because Applicant canceled the rejected claims. The claim rejections under 35 U.S.C. 102 have been withdrawn due to Applicant’s amendments to the claims. The claim rejections under 35 U.S.C. 103 have been withdrawn due to Applicant’s amendments to the claims. Specification The disclosure is objected to because of the following informalities: the specification comprises numerous instances of sequences with no SEQ ID NO identifier. Appropriate correction is required. Claim Objections This is a new objection, necessitated by Applicant’s amendment to the claims. Claim 1 is objected to because of the following informalities: the first instance of dCas9 should be spelled out. Appropriate correction is required. 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 11 and 12 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. This is a new rejection, necessitated by Applicant’s amendment to the claims. Claim 11 recites the limitation “to induce cleavage of the target DNA strand”, in lines 4-5 of the claim. Claim 11 also requires the fusion protein of claim 1, which comprises a dCas9 protein and is well-known to be an inactive form of Cas9 protein and does not induce cleavage of DNA. Therefore, it is unclear to what this limitation is referring. Claim 12 is included in the rejection as it depends from claim 11 and does not remedy the issue. Allowable Subject Matter Claim 1, 3, and 14-15 are allowed. As allowable subject matter has been indicated, applicant's reply must either comply with all formal requirements or specifically traverse each requirement not complied with. See 37 CFR 1.111(b) and MPEP § 707.07(a). The following is a statement of reasons for the indication of allowable subject matter: Applicant’s amendments to claim 1 overcame the art rejection of record. Additionally, Applicant’s arguments, see the remarks filed 05 June 2026, with respect to the combination of Wang and Fuqiang was fully considered and found to be persuasive. The UGI peptide in Wang was fused to the base editor via 2A self-cleaving peptides and not directly linked to the C-terminus of the dCas9 protein. Therefore, the combination of references do not disclose nor suggest the combination of limitations presented in claim 1, to include the specific configuration of the fusion protein. Conclusion Claims 1, 3, 14-15 are allowed. Claims 11-12 are rejected. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to NICHOLAS A. HUMPHRIES whose telephone number is (703)756-5556. The examiner can normally be reached Monday - Friday, 7:30am - 4:30 pm. 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, James Schultz can be reached at 571-272-0763. 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. /N.A.H./Examiner, Art Unit 1631 /LAURA SCHUBERG/Primary Examiner, Art Unit 1631
Read full office action

Prosecution Timeline

Mar 21, 2023
Application Filed
Mar 06, 2026
Non-Final Rejection mailed — §112
Jun 05, 2026
Response Filed
Aug 05, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12686875
SMALL MOLECULES FOR INCREASING PRECISE GENOME EDITING EFFICIENCY
5y 1m to grant Granted Jul 21, 2026
Patent 12653909
MODIFIED AAV CAPSIDS AND USES THEREOF
4y 2m to grant Granted Jun 16, 2026
Patent 12605541
STABILIZED ANTI-CANCER COLD ATMOSPHERIC PLASMA (CAP)-STIMULATED MEDIA AND METHODS FOR PREPARING AND USING SAME
4y 4m to grant Granted Apr 21, 2026
Patent 12577536
METHOD FOR ISOLATING URETERIC BUD TIP CELLS
3y 11m to grant Granted Mar 17, 2026
Patent 12533383
Method for Producing Cell Aggregate Including Glial Progenitor Cells
3y 11m to grant Granted Jan 27, 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

3-4
Expected OA Rounds
33%
Grant Probability
99%
With Interview (+78.6%)
3y 8m (~3m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 33 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