Prosecution Insights
Last updated: October 04, 2026
Application No. 18/274,752

GENE SILENCING

Non-Final OA §112
Filed
Jul 28, 2023
Priority
Feb 01, 2021 — EU 21154639.5 +1 more
Examiner
PYLA, EVELYN Y
Art Unit
1633
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Epsilen Bio S R L
OA Round
1 (Non-Final)
56%
Grant Probability
Moderate
1-2
OA Rounds
5m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 56% of resolved cases
56%
Career Allowance Rate
313 granted / 562 resolved
-4.3% vs TC avg
Strong +47% interview lift
Without
With
+47.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
45 currently pending
Career history
594
Total Applications
across all art units

Statute-Specific Performance

§101
5.4%
-34.6% vs TC avg
§103
48.3%
+8.3% vs TC avg
§102
11.7%
-28.3% vs TC avg
§112
24.2%
-15.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 562 resolved cases

Office Action

§112
DETAILED ACTION Claims 12-18, 20-29, 31, and 34-35 are currently pending. Claims 1-11, 19, 30, 32-33 are cancelled. 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 I, claims 12-18, 20-28 and 31 in the reply filed on 6/30/2026 is acknowledged. Election of Group I species of spacer SEQ ID NO: 2937; species of cell comprising progeny of claim 12; species of targeted gene is TGFBR2 gene; and sub-species of gRNAs is TGFBR2-targeting gRNAs TG7 and TG8, is acknowledged. Claims 13-14, 17-18, 29 and 34-35 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to nonelected inventions and/or species, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 6/30/2026. Priority Acknowledgement is made of the instant application being a national stage entry under 35 USC 371 of international application PCT/EP2022/052372, filed February 1, 2022. Acknowledgment is further made of applicants' claim for foreign priority to EP application 21154639.5, filed February 1, 2021. A certified copy of the foreign priority document is present in the application file. Information Disclosure Statement The information disclosure statements (IDS) submitted on 4/3/2024 and 6/30/2026 are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. Drawings The drawings are objected to because the drawings are indicated by “Figure” rather than “FIG.” as required by 37 C.F.R § 1.84 (u)(1) (see also MPEP § 608.02 (V)). Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. The figure or figure number of an amended drawing should not be labeled as “amended.” If a drawing figure is to be canceled, the appropriate figure must be removed from the replacement sheet, and where necessary, the remaining figures must be renumbered and appropriate changes made to the brief description of the several views of the drawings for consistency. Additional replacement sheets may be necessary to show the renumbering of the remaining figures. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Nucleotide and/or Amino Acid Sequence Disclosures REQUIREMENTS FOR PATENT APPLICATIONS CONTAINING NUCLEOTIDE AND/OR AMINO ACID SEQUENCE DISCLOSURES Items 1) and 2) provide general guidance related to requirements for sequence disclosures. 37 CFR 1.821(c) requires that patent applications which contain disclosures of nucleotide and/or amino acid sequences that fall within the definitions of 37 CFR 1.821(a) must contain a "Sequence Listing," 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 1.821 - 1.825. This "Sequence Listing" part of the disclosure may be submitted: In accordance with 37 CFR 1.821(c)(1) 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") as an ASCII text file, together with an incorporation-by-reference of the material in the ASCII text file in a separate paragraph of the specification as required by 37 CFR 1.823(b)(1) identifying: the name of the ASCII text file; ii) the date of creation; and iii) the size of the ASCII text file in bytes; In accordance with 37 CFR 1.821(c)(1) 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 of the material in the ASCII text file according to 37 CFR 1.52(e)(8) and 37 CFR 1.823(b)(1) in a separate paragraph of the specification identifying: the name of the ASCII text file; the date of creation; and the size of the ASCII text file in bytes; In accordance with 37 CFR 1.821(c)(2) via the USPTO patent electronic filing system as a PDF file (not recommended); or In accordance with 37 CFR 1.821(c)(3) on physical sheets of paper (not recommended). When a “Sequence Listing” has been submitted as a PDF file as in 1(c) above (37 CFR 1.821(c)(2)) or on physical sheets of paper as in 1(d) above (37 CFR 1.821(c)(3)), 37 CFR 1.821(e)(1) requires a computer readable form (CRF) of the “Sequence Listing” in accordance with the requirements of 37 CFR 1.824. If the "Sequence Listing" required by 37 CFR 1.821(c) is filed via the USPTO patent electronic filing system as a PDF, then 37 CFR 1.821(e)(1)(ii) or 1.821(e)(2)(ii) requires submission of a statement that the "Sequence Listing" content of the PDF copy and the CRF copy (the ASCII text file copy) are identical. If the "Sequence Listing" required by 37 CFR 1.821(c) is filed on paper or read-only optical disc, then 37 CFR 1.821(e)(1)(ii) or 1.821(e)(2)(ii) requires submission of a statement that the "Sequence Listing" content of the paper or read-only optical disc copy and the CRF are identical. Specific deficiencies and the required response to this Office Action are as follows: Specific deficiency - This application fails to comply with the requirements of 37 CFR 1.821 - 1.825. This application contains a “Sequence Listing” as a PDF file (37 CFR 1.821(c)(2)) or as physical sheets of paper (37 CFR 1.821(c)(3)). A copy of the "Sequence Listing" in computer readable form (CRF) has been submitted; however, the content of the CRF does not comply with one or more of the requirements of 37 CFR 1.822 through 1.824, as indicated in the "Error Report" that indicates the "Sequence Listing" could not be accepted. Refer to attachment or document "Computer Readable Form (CRF) for Sequence Listing – Defective" dated 9/3/2026. Required response – Applicant must provide: A replacement "Sequence Listing" part of the disclosure, as described above in item 1); together with An amendment specifically directing its entry into the application in accordance with 37 CFR 1.825(b)(2); A statement that the "Sequence Listing" includes no new matter as required by 37 CFR 1.825(b)(5); and A statement that indicates support for the amendment in the application, as filed, as required by 37 CFR 1.825(b)(4). If the replacement "Sequence Listing" part of the disclosure is submitted according to item 1) a) or b) above, Applicant must also provide: A substitute specification in compliance with 37 CFR 1.52, 1.121(b)(3), and 1.125 inserting the required incorporation-by-reference paragraph, 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 and An amendment to the specification to remove the “Sequence Listing previously submitted as a PDF file (37 CFR 1.821(c)(2)) or as physical sheets of paper (37 CFR 1.821(c)(3)) If the replacement "Sequence Listing" part of the disclosure is submitted according to item 1) c) or d) above, Applicant must also provide: A CRF in accordance with 1.821(e)(1) or 1.821(e)(2) as required by 37 CFR 1.825(b)(6)(ii); and Statement according to item 2) a) or b) above. Claim Interpretation The claims recite numerous optional limitations, e.g., claim 12 recites the limitation “optionally SpCas9”, thus said optional limitations do not further limit said claims. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 12, 15-16, 20-28 and 31 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 12 indicates the claimed combination performs the function of regulating one or more genes in a human cell, specifically a B2M gene, a TGFBR2 gene (elected species) and a TET2 gene. The claim as currently written encompasses regulation in any cell type, including cells that do not comprise a nucleus, such as mature red blood cells. Upon review of the specification, the specification shows that Applicants have not provided sufficient description of the invention to support they were in possession of a combination as claimed wherein the combination is capable of performing the function of regulating one or more genes in any human cell, such as those do not comprise a nucleus and thus lack functional genes, such as mature red blood cells. In the instant case the only references in the specification to regulating one or more genes in a human cell are directed to nucleated cells, such as T cells (e.g., Figures 13-16 and [0473]). A review of the specification shows that Applicants have not provided sufficient description of the invention to support they were in possession of a combination as claimed capable of regulating one or more genes in any human cell. Accordingly, the claims are considered to lack sufficient written description and are properly rejected under 35 USC 112, first 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 21-22, 24-25 and 28 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. Regarding claim 21, it is noted that claim 21 recites the following limitation: “(i) a first fusion protein comprising a transcriptional repressor domain and a Cas endonuclease domain, and a second fusion protein comprising a DNMT3L domain and a Cas endonuclease domain”. Said limitation renders claim 21 indefinite since it is unclear if the recited “a Cas endonuclease domain” is different from the inactive Cas9 recited in claim 12. Likewise, regarding claim 22, the limitations “a Cas endonuclease domain” render claim 22 indefinite since it is unclear if the recited “a Cas endonuclease domain” is different from the inactive Cas9 recited in claim 12. Regarding claim 24, it is noted the limitation “a dCas9 domain” renders claim 24 indefinite since it is unclear if said “a dCas9 domain” is the same or different from the inactive Cas9 of claim 12. Regarding claim 25 and the limitation “a catalytically active Cas9 domain”, said limitation renders claim 25 indefinite since it is unclear if the claim further comprises a catalytically active Cas9 domain in addition to the inactive Cas9 domain of claim 12. Regarding claim 28, it is noted the claim is awkwardly written, and thus unclear, in regard to the claimed cell comprising a progeny of the cell. It is unclear if applicant means the progeny of the cell comprises the combination of claim 12, that is the claim would read as follows: “A cell comprising the combination of claim 12, or a progeny of the cell comprises the combination of claim 12.” Conclusion Despite extensive searching, it is noted that none of the references cited by the Applicant nor those reviewed by the Examiner upon searching the appropriate data bases teach or would have suggested a combination for regulating one or more genes in a human nucleated cell, the combination comprising one to three fusion proteins each comprising a catalytically inactive Cas9, optionally SpCas9, endonuclease domain, wherein the one to three fusion proteins collectively comprise a transcriptional repressor and a DNMT3L domain, or polynucleotide(s) encoding the one to three fusion proteins, wherein the gene comprises a CpG island (CGI) and is a TGFBR2 gene and the combination further comprises a gRNA that comprises a spacer having the sequence of SEQ ID NO: 2937. It is further noted that SEQ ID NOs: 2930 and 2937 were specifically searched. Examiner Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to E. YVONNE PYLA whose telephone number is (571)270-7366. The examiner can normally be reached M-F 9am - 6pm. 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, CHRISTOPHER BABIC can be reached at 571-272-8507. 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. E. YVONNE PYLA Primary Examiner Art Unit 1633 /EVELYN Y PYLA/Primary Examiner, Art Unit 1633
Read full office action

Prosecution Timeline

Jul 28, 2023
Application Filed
Sep 02, 2026
Examiner Interview (Telephonic)
Sep 16, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12741061
METHOD FOR OBTAINING HEALTHY INTESTINAL ORGANOIDS
4y 6m to grant Granted Sep 22, 2026
Patent 12729228
TRANSFORMING GROWTH FACTOR BETA-RESISTANT NATURAL KILLER CELLS
6y 1m to grant Granted Sep 08, 2026
Patent 12714728
METHODS FOR THE PRODUCTION OF CARDIAC FIBROBLASTS
2y 10m to grant Granted Aug 25, 2026
Patent 12686848
METHOD FOR PREPARING CELLULAR SPHEROID AND METHOD FOR PRODUCING EXTRACELLULAR VESICLES BY USING CELLULAR SPHEROID PREPARED BY SUCH METHOD
3y 4m to grant Granted Jul 21, 2026
Patent 12668779
METHOD FOR IN VITRO EXPANSION OF CRYOPRESERVED CORD BLOOD-DERIVED REGULATORY T CELLS (Tregs) WITH HIGH RECOVERY RATE
1y 5m to grant Granted Jun 30, 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
56%
Grant Probability
99%
With Interview (+47.1%)
3y 7m (~5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 562 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