Prosecution Insights
Last updated: May 29, 2026
Application No. 18/068,872

COMPOSITIONS AND METHODS RELATED TO ACTIVATABLE THERAPEUTIC AGENTS

Non-Final OA §101§112
Filed
Dec 20, 2022
Priority
Jul 21, 2020 — provisional 63/054,525 +1 more
Examiner
EMCH, GREGORY S
Art Unit
1678
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Amunix Pharmaceuticals Inc.
OA Round
1 (Non-Final)
49%
Grant Probability
Moderate
1-2
OA Rounds
1m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 49% of resolved cases
49%
Career Allowance Rate
305 granted / 623 resolved
-11.0% vs TC avg
Strong +44% interview lift
Without
With
+44.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
32 currently pending
Career history
662
Total Applications
across all art units

Statute-Specific Performance

§101
2.8%
-37.2% vs TC avg
§103
47.4%
+7.4% vs TC avg
§102
15.3%
-24.7% vs TC avg
§112
11.6%
-28.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 623 resolved cases

Office Action

§101 §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 . Applicant’s election without traverse of Group I, claims 1, 2, 10, 15, 19, 23, 27, 35, 40, 41, 47, 52, 57, 58, 63, 70, 81, 85 in the reply filed on 11/25/2025 is acknowledged. Note, kit claim 106 should have grouped to invention III (see previous restriction office action). Examiner inadvertently grouped kit claim 106 in Group I. Thus, group I should not include claim 106. Applicants also elected species of SEQ ID No. 2179 for prosecution. Claims 1, 2, 10, 15, 19, 23, 27, 35, 40, 41, 47, 52, 57, 58, 63, 70, 81, 85, 95-96 and 106 are pending, and claims 95-96 and 106 are withdrawn from further consideration. Currently, claims 1, 2, 10, 15, 19, 23, 27, 35, 40, 41, 47, 52, 57, 58, 63, 70, 81, and 85 are under examination. Specification The disclosure is objected to because of the following informalities: Experiments #4 the brief description of GVAPGIGPGG and experiment #5 i) a sequence of GVAPGIGPGG (SEQ ID NO: ) (ii) a sequence of VAAAAKSAAK (SEQ ID NO: ) (iii) a sequence of GPGGVAAA (SEQ ID NO: ). The above disclosed portions of sequences that do not appear to be identified with a SEQ ID number. Applicant is reminded that if the disclosed nucleotide encompasses more than 10 nucleotides, or the disclosed polypeptide encompasses more than 4 amino acid residues, then applicant must comply with the Sequence Rules as set forth in 37 CFR 1.821-1.825. Appropriate correction is required. Claim Objections Claims 2 and 52 are objected to because of the following informalities: Claim 2, part b, line 3, the word “amno” is misspelled. Claim 52, part (a), line 7, the word “protion” is misspelled. 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 1, 2, 10, 15, 19, 23, 27, 35, 41, 47, 52, 57, 58, 63, 70, 81, and 85 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. As to claims 1, 2, 41,47, 52, 57-58, 63, MPEP 2173.05(s)“Where possible, claims are to be complete in themselves. Incorporation by reference to a specific figure or Table is permitted only in exceptional circumstances where there is no practical way to define the invention in words and where it is more concise to incorporate by reference than duplicating a drawing or table into the claim. Incorporation by reference is a necessity doctrine, not for applicant’s convenience." Ex parte Fressola, 27 USPQ2d 1608, 1609 (Bd. Pat. App. & Inter. 1993).” It is suggested using SEQ ID Nos for the claim language. As to claim 2, step b, the polypeptide portion “comprises at least four, at least five, at least six….ten consecutive amino acid residues.” is not clear. A broad range or limitation together with a narrow range or limitation that falls within the broad range or limitation (in the same claim) may be considered indefinite if the resulting claim does not clearly set forth the metes and bounds of the patent protection desired. See MPEP § 2173.05(c). In the present instance, claim 2 recites the broad recitation “at least four”, and the claim also recites “at least five...., at least ten consecutive amino acid residues….”, which is the narrower statement of the range/limitation. The claim is considered indefinite because there is a question or doubt as to whether the feature introduced by such narrower language is (a) merely exemplary of the remainder of the claim, and therefore not required, or (b) a required feature of the claims. Similarly step (e ), (f) and (g) shares the same problem. As to claim 10, step a, the term “nominal” for threshold is not defined in the specification. Therefore it is not clear what amount of peptide meets the limit of “nominal” threshold. See MPEP 2173.05(d). As to claim 15, step a, “said mammalian protease is preferentially expressed..”. The term “preferentially” is similar to “preferable or preferably” which lacks meets and bounds, i.e. is it or not expressed as claimed. See MPEP 2173.05(d) As to claim 23, step c , line 2 and last 12th line, the phrase "for example, and not limited to" renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). As to claim 23, step c, line 13, “such as” lacks meets and bounds. See MPEP 2173.05(d). As to claim 27, it is not clear whether the therapeutic agent contain all components of a, b, and c? Or components a, b and c are Markush selection. Please clarify. Similarly claim 85 shares the same problem. As to claim 41, step (d)(ii), last two lines, the phrase “contains at least five, at least six….ten consecutive amino acid residues” shares the same problem as above in terms of the definite range and limitation. MPEP 2173.05(d). As to claim 52, step (b), the phrase the polypeptide substrate…has at most three amino acid substitutions, at most two amino acid substitutions, or at most one amino acid substitution..” shares the same issue as above in terms of definite range and limitation. Similarly claim 63, step (a)(i), (b) and (d) also share the same problem. As to claim 58, step (a)-(c ), “at least seven, at least eight, at least nine…ten” also shares the same problem with respect to definite limitation and range as above. claim 58, step f, the term “nominal” threshold, it is not clear what amount of peptide meets the limit of “nominal” threshold. As to claim 70, step b, line 1, “preferentially expressed” lacks meets and bounds. As to claim 81, step (a ), the phrase "for example, and not limited to" as well as “such as” render the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). 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 1, 2, 10, 15, 19, 23, 27, and 35 are rejected under 35 U.S.C. 101 the claimed invention is directed to law of nature without significantly more. The invention directs to a method for assessing a likelihood of a subject being responsive to a therapeutic agent that is activatable by a mammalian protease expressed in the subject having a disease or disorder. The claimed method comprises determining in a biological sample from the subject a presence or amount of a proteolytic peptide product produced by the mammalian protease as shown in Column V, IV or VI of Table A, wherein the subject would be likely to respond to said therapeutic agent if the peptide is present or amounts exceeds a threshold. The law of nature refers to (1) measuring a proteolytic peptide as from Table A column IV, V or VI produced by action of a protease in a subject, and (2) correlating the presence or exceeding a threshold value of the peptide to a likelihood of the subject being responsive to a therapeutic that is activable by the same protease expressed in said subject. Therefore, the claims encompass the judicial exception of a natural correlation. This judicial exception is not integrated into a practical application because no extra step of specific treatment is incorporated in the claim. See MPEP 2106.04(d)(2) The claim(s) does/do not include additional elements that are sufficient to amount to significantly more than the judicial exception because all the sample obtaining, processing and measuring specific natural molecules are common, routine, and well-known in the field, such as LC-MS, MALDI-TOF, ELISA (See Examples 3-5). These steps are recited at a high level of generality, and are necessary data gathering steps that feed into the determining step. One cannot do the determining step without getting the data. This weighs against it being significantly more. Claim 40 is allowed. The following is an examiner’s statement of reasons for allowance: Prior teaches using proteolytic biomarker peptides for diagnosis of protease-associated diseases, such as cancer and connective tissue disease (arthritis) (WO2013182237; IDS reference). The novelty of the current method is the use of a proteolytic peptide biomarker cleaved by a protease in a subject as an indicator that a subject is likely to respond to an activable therapeutic agent (prodrug) comprising a peptide substrate cleavable by the same protease in the subject and thus more active ingredient can be released from the therapeutic agent when administering the therapeutic agent to the subject. The peptide biomarker comprises a portion identical to at least four consecutive amino acid residues of said activable therapeutic peptide substrate sequence that is either N-terminal or C-terminal of a scissile bond cleavable by said protease. The closest prior art is the reference of Choi (Theranostic 2012 2:156; IDS reference) where Choi reviews peptide-linked prodrug and its function via specific enzymatic cleavage in releasing the active ingredient (see page 157, left column, last paragraph to first paragraph right column; also see Table 2 list of substrates vs. specific cleavage enzymes). However no disclosure from Choi teaches or suggests of instant method for assessing a likelihood of a subject being responsive to a peptide-linked therapeutic that is activable by a protease and the protease-cleaved peptide can be an indicator of likelihood of responsiveness to said therapeutic. Comments: as to claims 1, and 57, the elected proteolytic peptide SEQ ID No 2179 and SEQ ID No. 1989-1999 are free of prior art but subject to 35 USC 101 and 35 USC 112(b) rejection. Hancock (US 20090035797) also teaches measuring SEQ ID No. 2179 (RPPGFSPF) in normal healthy subjects (See SEQ ID No. 2 in Table 3). However Hancock dos not teach using SEQ ID No. 2179 for assessing the likelihood of a subject being responsive to a therapeutic agent activable by a protease capable of producing the proteolytic SED ID 2179. It is noted that the total number SEQ ID Nos in column VI, V and VI in Table A exceeds 900. Therefore in response to this Office Action, please elect 10 more SEQ ID Nos in total from column VI, V and VI in Table A for prosecution. Should the SEQ ID Nos be found free of prior art, more SEQ ID Nos would be continued searched. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHANGHWA J CHEU whose telephone number is (571)272-0814. The examiner can normally be reached 8 am to 8 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, Gregory Emch can be reached at 5712728149. 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. CHANGHWA J. CHEU Primary Examiner Art Unit 1678 /CHANGHWA J CHEU/Primary Examiner, Art Unit 1678
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Prosecution Timeline

Dec 20, 2022
Application Filed
Jan 09, 2026
Non-Final Rejection (signed) — §101, §112
Mar 30, 2026
Non-Final Rejection mailed — §101, §112 (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
49%
Grant Probability
93%
With Interview (+44.3%)
3y 7m (~1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 623 resolved cases by this examiner. Grant probability derived from career allowance rate.

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