Prosecution Insights
Last updated: October 02, 2026
Application No. 18/512,901

METHOD OF PRODUCING BLOCK COPOLYMER, AND BLOCK COPOLYMER

Non-Final OA §102
Filed
Nov 17, 2023
Priority
Nov 22, 2022 — JP 2022-186472
Examiner
KAUCHER, MARK S
Art Unit
Tech Center
Assignee
Tokyo Ohka Kogyo Co., Ltd.
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
730 granted / 1008 resolved
+12.4% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
28 currently pending
Career history
1024
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
42.9%
+2.9% vs TC avg
§102
23.4%
-16.6% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1008 resolved cases

Office Action

§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 Election/Restrictions Claims 1-4 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim.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 8/14/26. Applicant’s election without traverse of Group I, claims 5-6 in the reply filed on 8/14/26 is acknowledged. 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. Claim(s) 5-6 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Hirao et al. Macromolecules 2011,44,6345-6355 (herein Hirao). As to claim 5, Hirao discloses a block copolymer (see abstract and examples) comprising three blocks (A, B, A’) with two blocks of polystyrene (PS, a styrene is a unit containing an aromatic hydrocarbon group, both of which are the same, reading on claim 6) and a second block is polymethyl methacrylate (PMMA, which comprises the unit methyl methacrylate which is an acrylic acid ester having a alpha position hydrogen substituted with a methyl group). The Third block is bonded to a side chain of the second block via a linking group containing an ester bond. Specifically, see scheme 2 showing the formation of PS-b-PMMA-b-P2VP, wherein PS and P2VP read on the first and third block having aromatic hydrogen groups and PMMA reads on the second block. Note that the P2VP group is attached to the PMMA group via an ester bond. Scheme 2 is reproduced below for convenience. PNG media_image1.png 201 897 media_image1.png Greyscale Also see table 3 describing Ps-b-PMMA-b-PS blocks with the ACA’ structure, wherein the A’ represents a block with the ester bond linkage off a side chain (similar to the language utilized in the instant specification. As to the limitation “side chain”, note that the PNG media_image2.png 70 59 media_image2.png Greyscale at the terminal end of the PMMA group reads on side chain and is similar to that utilized in the examples of the instant invention. Note that the PS or P2VP block is attached via the double bond of the atropate (alpha-phenyl acrylate) group. Again, Hirao discloses the following block copolymers: PNG media_image3.png 276 644 media_image3.png Greyscale Wherein the red blue red structure represents ACA’ discussed above and the green blue green represents P2VP-b-PMMA-b-P2VP’ (also reading on claims 5 and 6) and the red-green-blue represents PS-b-PMMA-b-P2VP’ (also reading on claim 5). All limitations are met. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARK S KAUCHER whose telephone number is (571)270-7340. The examiner can normally be reached M-F 8-6 PM EST. 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, Arrie Lanee Reuther can be reached at (571) 270-7026. 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. /MARK S KAUCHER/Primary Examiner, Art Unit 1764
Read full office action

Prosecution Timeline

Nov 17, 2023
Application Filed
Sep 17, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12747313
PROCESS FOR THE PRODUCTION OF A VINYL CHLORIDE-(METH)ACRYLATE COPOLYMER AND COMPOSITION COMPRISING SUCH A COPOLYMER
3y 4m to grant Granted Sep 29, 2026
Patent 12747304
METHOD FOR PRODUCING C9 HYDROGENATED RESIN BY REUSING THERMALLY POLYMERIZED LIQUID RESIN
2y 8m to grant Granted Sep 29, 2026
Patent 12741936
COMPOUND, POLYMERIZABLE COMPOSITION, POLYMER, AND POLYMERIZED FILM
2y 10m to grant Granted Sep 22, 2026
Patent 12735560
POLYPROPYLENE-BASED RESIN COMPOSITION, HYDROGENATED BLOCK COPOLYMER, MOLDED ARTICLE, AND INTERIOR-EXTERIOR DECORATIVE MATERIAL FOR AUTOMOBILES
3y 7m to grant Granted Sep 15, 2026
Patent 12729293
POLYPROPYLENE - POLYETHYLENE BLENDS WITH IMPROVED PROPERTIES
4y 6m to grant Granted Sep 08, 2026
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
72%
Grant Probability
86%
With Interview (+14.0%)
2y 9m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1008 resolved cases by this examiner. Grant probability derived from career allowance rate.

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