Prosecution Insights
Last updated: October 27, 2026
Application No. 18/423,695

HIGH DENSITY PEPTIDE POLYMERS

Final Rejection §103§112
Filed
Jan 26, 2024
Priority
Aug 08, 2014 — provisional 62/035,313 +4 more
Examiner
YU, HONG
Art Unit
1614
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
The Regents of the University of California
OA Round
2 (Final)
31%
Grant Probability
At Risk
3-4
OA Rounds
11m
Est. Remaining
37%
With Interview

Examiner Intelligence

Grants only 31% of cases
31%
Career Allowance Rate
218 granted / 700 resolved
-28.9% vs TC avg
Moderate +6% lift
Without
With
+5.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
54 currently pending
Career history
776
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
51.5%
+11.5% vs TC avg
§102
18.5%
-21.5% vs TC avg
§112
16.5%
-23.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 700 resolved cases

Office Action

§103 §112
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 . In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. DETAILED ACTION Information Disclosure Statement The information disclosure statement (IDS) submitted on 08/06/2026 was filed after the mailing date of the non-final rejection on 04/30/2026. The submission is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Status of claims The amendment filed on 07/30/2026 is acknowledged. Claims 1-30 have been cancelled, claims 32, 47, and 48 have been withdrawn, and new claim 49 has been added. Claims 31, 33-46 and 49 are under examination in the instant office action. Applicant’s election of anti-tumor or anti-cancer peptide in claim 38 among claims 34, 35 and 38-42 as ONE SINGLE SPECIES of therapeutic polypeptide is a clear admission of the species in claims 34, 35 and 38-42 being obvious variants of anti-tumor or anti-cancer peptide and applicant’s election of substituted or unsubstituted alkylene in claim 31 among claims 31 and 43-46 as ONE SINGLE SPECIES of L1 is a clear admission of the species in claims 43-46 being obvious variants of substituted or unsubstituted alkylene according to the restriction requirement dated 12/10/2025 page 9. Thus, if the examiner finds one of the inventions unpatentable over the prior art, the admissions may be used in a rejection under 35 U.S.C. 103 or pre-AIA 35 U.S.C. 103(a) of the other invention. Rejections withdrawn Applicant’s amendments and arguments filed on 07/30/2026 are acknowledged and have been fully considered. Any rejection and/or objection not specifically addressed below is herein withdrawn. Applicant’s amendments have overcome the claim objections of claim 39 and claim 31, 35 U.S.C. 112(b) rejection of claims 31 and 33-46, and 35 U.S.C. 103(a) rejection of claims 31 and 33-46 over Lu et al. (One-Pot Synthesis of Brush-Like Polymers via Integrated Ring-Opening Metathesis Polymerization and Polymerization of Amino Acid N-Carboxyanhydrides, Journal of the American Chemical Society, Vol 131, Issue 38, Article, page 13582-13583, 09/02/2009) and Gaspar et al. (From antimicrobial to anticancer peptides. A review, Frontiers in Microbiology, Antimicrobials, Resistance and Chemotherapy, 09/30/2013) from the previous Office Action. The following rejections and/or objections are either reiterated or newly applied. They constitute the complete set of rejections and/or objections presently being applied to the instant application. Rejections maintained The following rejection of the claims is remained for reasons of record and the following. New claim is hereby included in the rejection and the rejection is modified based on the amendment (newly underlined). 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. Claims 31, 34, 35, 38, 41, 42, and 49 are rejected under 35 U.S.C. 112(a) for failure to comply with the written description requirement. The description requirement of the patent statute requires a description of an invention, not an indication of a result that one might achieve if one made that invention. See, e.g., In re Wilder, 22 USPQ 369, 372-3 (Fed. Cir. 1984). (Holding that a claim was not adequately described because the specification did ‘little more than outline goals appellants hope the claimed invention achieves and the problems the invention will hopefully ameliorate.’) Mere indistinct terms (such as “therapeutic”, “capable of treating a disease”, “anti-tumor or anti-cancer” (elected species) used herein), however, may not suffice to meet the written description requirement. This is particularly true when a polypeptide is claimed in purely functional terms. See Univ. of Rochester v. G.D. Searle, 69 USPQ2d 1886 (CAFC 2004) at 1892, stating: The appearance of mere indistinct words in a specification or a claim, even an original claim, does not necessarily satisfy that requirement. A description of an anti-inflammatory steroid, i.e., a steroid (a generic structural term) described even in terms of its functioning of lessening inflammation of tissues fails to distinguish any steroid from others having the same activity or function. A description of what a material does, rather than of what it is, usually does not suffice…. The disclosure must allow one skilled in the art to visualize or recognize the identity of the subject matter purportedly described. (Emphasis added). Conversely, a description of a polypeptide genus will usually comprise a recitation of amino acid sequence common to the members of the genus, which features constitute a substantial portion of the genus. See Univ. of Calf. V. Eli Lilly, 43 USPQ 2d 1398, 1406 (Fed. Cir. 1997). This is analogous to enablement of a genus under Section 112, ¶ 1, by showing the enablement of a representative number of species within the genus. A “therapeutic”, “capable of treating a disease”, “anti-tumor or anti-cancer” polypeptide genus can be adequately described if the disclosure presents a sufficient number of representative species that encompass the genus. If the genus has substantial variance, the disclosure must describe a sufficient number of species to reflect the variation within that genus. See MPEP 2163. The MPEP lists factors that can be used to determine if sufficient evidence of possession has been furnished in the disclosure of the Application. These include the level of skill and knowledge in the art, partial structure, physical and/or chemical properties, functional characteristics alone or coupled with a known or disclosed correlation between structure and function, and the method of making the claimed invention. Disclosure of any combination of such identifying characteristics that distinguish the claimed invention from other materials and would lead one of skill in the art to the conclusion that the applicant was in possession of the claimed species is sufficient. MPEP 2163. Here, the specification does not provide a reasonably representative disclosure of useful “therapeutic”, “capable of treating a disease”, “anti-tumor or anti-cancer” polypeptides generally, a potentially huge genus inclusive of many different polypeptides having widely divergent sequences and functions (different types of cancer) including future, undiscovered polypeptides (reach-through). Specifically, the specification discloses only a limited number of species in paragraph 202 and 203 (also not all of them are therapeutic: Ceruletide is not therapeutic), and these are not viewed as being reasonably representative of the genus in its claimed scope because no readily apparent combination of identifying characteristics is provided, other than the disclosure of those specific species as examples of the claimed genus. Response to Applicants’ arguments: Applicants argue that claim31 is directed to a specific copolymer, not an unbounded functional result. However, this argument is not deemed persuasive. The rejection is directed to the limitation of a therapeutic polypeptide of R4 (O in MO) while the polymer without R4 is not therapeutic and is the carrier for R4. New ground of rejection necessitated by Applicant’s amendment The amendments necessitate the following new ground of rejection. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims under 35 U.S.C. 103(a), the examiner presumes that the subject matter of the various claims was commonly owned at the time any inventions covered therein were made absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and invention dates of each claim that was not commonly owned at the time a later invention was made in order for the examiner to consider the applicability of 35 U.S.C. 103(c) and potential 35 U.S.C. 102(e), (f) or (g) prior art under 35 U.S.C. 103(a). The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103(a) are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 31, 33-46, and 49 are rejected under 35 U.S.C. 103(a) as being unpatentable over Lu et al. (One-Pot Synthesis of Brush-Like Polymers via Integrated Ring-Opening Metathesis Polymerization and Polymerization of Amino Acid N-Carboxyanhydrides, Journal of the American Chemical Society, Vol 131, Issue 38, Article, page 13582-13583, 09/02/2009) in view of Gaspar et al. (From antimicrobial to anticancer peptides. A review, Frontiers in Microbiology, Antimicrobials, Resistance and Chemotherapy, 09/30/2013) and Maynard et al. (Synthesis of Norbornenyl Polymers with Bioactive Oligopeptides by Ring-Opening Metathesis Polymerization. Macromolecules 22 August 2000; 33 (17): 6239–6248). Lu et al. teach, in abstract and the last paragraph in the left column and the first paragraph on the right column, scheme 2 and table 1 and 2, a brush-like polymer via integrated ring-opening metathesis polymerization (ROMP) via approach 3 in scheme 2 PNG media_image1.png 200 400 media_image1.png Greyscale (homopolymer formed from M4 PNG media_image2.png 200 400 media_image2.png Greyscale which is formed from M2 PNG media_image3.png 200 400 media_image3.png Greyscale and exemplified polymers P6-P10 in table 1 with both M2 and M4, i.e., copolymers having two different monomers M2 and M4 both having a polypeptide and TMS as a protecting group (will be removed after the polymerization, the claimed copolymer in the instant claims 31 and 33) from 5-norbornene-endo-2,3-dicarboximide (M1) (the claimed ROMP monomer M in the formula in the instant claim 31) catalyzed by Grubbs catalyst (results in phenyl terminal groups (unsubstituted aryl, the claimed R1 and R2 in the formula in the instant claims 31, 36, and 37) with both M2 in the left part of the monomer M4 and monomer M2 having grafted polypeptide (the portion within the parenthesis having “n” repeating unit in the pendant, the claimed O in the formula in the instant claim 31) (P6-P10 in table 1), i.e., a copolymer having a polypeptide and TMS as a protecting group (will be removed after the polymerization) (the claimed M(O) in the instant claim 31), -CH2-CH2-NH- between the cyclic -N- on norbornene and the polypeptide (substituted alkylene, the elected species of the claimed L1 in M(O) in the instant claims 31 and 43-46 as discussed above), and exemplified P2-g-Glu50 in table 2 with x=9 (degree of polymerization, the claimed n in the formula in the instant claim 31) having 50 Glu (50 amino acids). Lu et al. do not specify the polypeptides (the claimed O and R4) in M2 and the polypeptide in M4 (the claimed O and R4) being different in the instant claims 31 and 49. This deficiency is cured by Maynard et al. who teach different oligopeptides being the side chains of a norbornenyl polymer prepared by ring-opening metathesis polymerization (title and the molecule structure on the first page). In KSR v. Telefex, 82 USPQ2d 1385, 1397 (U.S. 2007), the Supreme Court has held that when there is market pressure to solve a problem and there are a finite number of identified, predictable solutions, a person has good reason to pursue known options within his or her technical grasp. If this leads to the anticipated success, it is likely the product not of innovation but of ordinary skill and common sense. Under these conditions, “obviousness to try” such options is permissible. In this instance, Lu et al. utilize both M2 and M4 to produce a copolymer with polypeptide side chain on both M2 and M4 while Lu et al. teach “polypeptides” in abstract, thus the side chain polypeptides on M2 and M4 are not limited to the same polypeptide and Maynard et al. teach different oligopeptides being the side chains of a norbornenyl polymer prepared by ring-opening metathesis polymerization. Thus, it would have been obvious to one of ordinary skill in the art to try to use M2 and M4 from a different M2, i.e., polypeptide on M4 in the copolymer being different from the polypeptide on M2 in the copolymer, if it is needed. Furthermore, according to the disclosure in the instant specification the Os in the polymer being different is optional (paragraph 181). Thus, the criticality of the Os being different over the Os being the same is not established. Lu et al. do not specify the polypeptide including anti-tumor or anti-cancer peptide (the elected species in the instant claims 31, 34, 35 and 38-42. This deficiency is cured by Gaspar et al. who teach peptides with anticancer are known (abstract, the paragraph bridges left and right column on page 3 and table 1). In KSR v. Telefex, 82 USPQ2d 1385, 1397 (U.S. 2007), the Supreme Court has held that when there is market pressure to solve a problem and there are a finite number of identified, predictable solutions, a person has good reason to pursue known options within his or her technical grasp. If this leads to the anticipated success, it is likely the product not of innovation but of ordinary skill and common sense. Under these conditions, “obviousness to try” such options is permissible. In this instance, Lu et al. utilize monomer 5-norbornene-endo-2,3-dicarboximide to produce a polymer with polypeptide side chain while Gaspar et al. teach anticancer peptides. Thus, it would have been obvious to one of ordinary skill in the art to try to use anticancer peptides taught by Gaspar et al. as the polypeptide side chain in the polymer taught by Lu et al. because all amino acids in any polypeptide have both an amine functional group and a carboxylic functional group that is needed in functionalization the repeating unite M2 taught by Lu et al. Response to Applicants’ arguments: Applicant’s arguments, filed on 07/30/2026, have been fully considered but they are moot in view of new ground of rejections. Conclusion No claims are allowed. 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 extension fee 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 HONG YU whose telephone number is (571)270-1328. The examiner can normally be reached on 9 am - 5:30 pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Ali Soroush can be reached on 571-272-9925. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /HONG YU/ Primary Examiner, Art Unit 1614
Read full office action

Prosecution Timeline

Jan 26, 2024
Application Filed
Apr 30, 2026
Non-Final Rejection mailed — §103, §112
Jul 30, 2026
Response Filed
Oct 13, 2026
Final Rejection mailed — §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12741055
NOVEL POLYSACCHARIDE-BASED HYDROGEL SCAFFOLDS FOR WOUND CARE
4y 10m to grant Granted Sep 22, 2026
Patent 12721861
DELIVERY AND RETENTION OF ACTIVE AGENTS WITHIN THE SKIN
4y 11m to grant Granted Sep 01, 2026
Patent 12721929
COMPOSITION USING FIBROTIC ACELLULAR DERMAL MATRIX, AND METHOD FOR PREPARING SAME
2y 8m to grant Granted Sep 01, 2026
Patent 12653185
MICROCAPSULES ENCAPSULATING LAMBDA-CYHALOTHRIN
7y 5m to grant Granted Jun 16, 2026
Patent 12648896
EMULSION COSMETIC
5y 4m to grant Granted Jun 09, 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
31%
Grant Probability
37%
With Interview (+5.7%)
3y 8m (~11m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 700 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