Prosecution Insights
Last updated: July 17, 2026
Application No. 18/269,255

NOVEL PEPTIDE CAPABLE OF INHIBITING TGF-ß SIGNALING AND USE THEREOF

Non-Final OA §101§102
Filed
Jun 22, 2023
Priority
Dec 23, 2020 — RE 10-2020-0182441 +1 more
Examiner
LEE, JIA-HAI
Art Unit
1658
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Korea Institute of Science and Technology
OA Round
1 (Non-Final)
50%
Grant Probability
Moderate
1-2
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 50% of resolved cases
50%
Career Allowance Rate
220 granted / 442 resolved
-10.2% vs TC avg
Strong +48% interview lift
Without
With
+47.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
53 currently pending
Career history
509
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
44.7%
+4.7% vs TC avg
§102
5.4%
-34.6% vs TC avg
§112
2.5%
-37.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 442 resolved cases

Office Action

§101 §102
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 I, claims 19-25, in the reply filed on 4/28/2026 is acknowledged. Claims 26-37 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim.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 4/28/2026. In response to the species election, applicant elected the peptide sequence of SEQ ID NO: 6 (FCLGPCPYIWSLDTVLSL). Claim Status Claims 19-37 are pending. Claims 1-18 are cancelled. Claims 26-37 are withdrawn as being directed to a non-elected invention, the election having been made on 4/28/2026. Claims 19-25 have been examined. Priority This application is a 371 of PCT/KR2021/019667 filed on 12/22/2021 claiming foreign priority of KOREA, REPUBLIC OF 10-2020-0182441 filed on 12/23/2020. Information Disclosure Statement The information disclosure statement (IDS) submitted on 6/22/2023 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement has been considered by the examiner. Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claims 19-20 and 22-24 are rejected under 35 U.S.C. 101 because the claims encompass a natural protein of transforming growth factor-β (TGF-β). The eligibility of patent subject of 101 analysis is further analyzed as follows. Step 1. The claim is directed to a polypeptide product comprising the peptide formula I sequence of F[C/S]LGP[C/S]PYIW[C/S]LDT. Step 2A-Prone 1 (judicial exception). No, the claim does not cite judicial exceptions Step 2A-Prone 2 (whether the claim as whole integrates the recited judicial exception into a practical application of the exception). No, there is nothing in the claim to integrate the judicial exception (JE) into any particular practical application. The amounts in the claims are the amounts in which the peptides naturally occurring. Step 2B: No, there is nothing in the claim that causes it to amount to significantly more than the JE. The high level of generality for a protein comprising the peptide formula sequence encompasses a natural protein of human transforming growth factor-β (TGF-β) as evidenced by Uniport human transforming growth factor beta-1 proprotein shown as follows (https://www. uniprot.org/uniprotkb/P01137/entry#sequences). Thus, the claim 19 as a whole with a combination of all elements amounts to significantly no more than the JEs. PNG media_image1.png 434 1234 media_image1.png Greyscale With respect to claim 20, human transforming growth factor-β comprises A319 at the N-terminus of the underlined peptide motif of FCLGPCPYIWSLDT and S337 at the C-terminus of the underlined peptide motif. PNG media_image2.png 143 620 media_image2.png Greyscale With respect to claims 22-24, a side-by-side comparison of the naturally occurring human transforming growth factor beta-1 proprotein to the instant SEQ ID NO: 1 shows 95.7% homology above. 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. Claims 19, 22-23, and 25 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ezquerro Saenz et al. (US 7,057,013 B1, cited in IDS). PNG media_image3.png 98 304 media_image3.png Greyscale Claim 19 is drawn to a peptide comprising at least 80% homology to the peptide formula 1 of F[C/S]LGP[C/S]PYIW[C/S]LDT. Ezquerro Saenz et al. teach TGF-β1 inhibitor peptide (Title). A side-by-side comparison Ezquerro Saenz’s SEQ ID NO: 2 (col 16, Table 3) with the peptide formula 1 and instant SEQ ID NO: 5 is shown above, reading on claims 19 and 22-23 and 25. A single amino acid mismatch out of a peptide with 14 amino acid in length is 92.8% homology. Claims 19-25 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ezquerro et al. (Cytokine 22 (2003) 12–20, cited in IDS). Claim 19 is drawn to a peptide comprising 80% homology to the peptide formula 1 of F[C/S]LGP[C/S]PYIW[C/S]LDT. Ezquerro et al. show inhibition of human TGF-b1 by synthetic peptides comprising the peptide P12 derived from human TGF-β1. A side-by-side comparison Ezquerro’s peptide P12 (p13, Table 1) with the peptide formula 1 and the instant SEQ ID NO: 1 is shown as follows, PNG media_image4.png 96 328 media_image4.png Greyscale reading on the instant claims 19-25. Ezquerro’s P12 peptide has 100% homology to the instant SEQ ID NO: 1. Examiner’s Note: The closest prior art reference, Ezquerro et al. (Cytokine 22 (2003) 12–20, cited in IDS), does not teach or suggest a peptide of formula 1 immediately linked to a tetrapeptide VLSL or VLSF at the C-terminus. Conclusion No claim is allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JIA-HAI LEE whose telephone number is (571)270-1691. The examiner can normally be reached Mon-Fri from 9:00 AM to 6:00 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, Melissa Fisher can be reached at 571-270-7430. 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. /J.L/Examiner, Art Unit 1658 15-May-2026 /Melissa L Fisher/ Supervisory Patent Examiner, Art Unit 1658
Read full office action

Prosecution Timeline

Jun 22, 2023
Application Filed
May 28, 2026
Non-Final Rejection mailed — §101, §102 (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
50%
Grant Probability
98%
With Interview (+47.9%)
2y 11m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 442 resolved cases by this examiner. Grant probability derived from career allowance rate.

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