Prosecution Insights
Last updated: August 17, 2026
Application No. 18/569,429

Polycarbonate Resin and Method for Preparing Same

Non-Final OA §102
Filed
Dec 12, 2023
Priority
Mar 23, 2022 — RE 10-2022-0035977 +1 more
Examiner
LISTVOYB, GREGORY
Art Unit
Tech Center
Assignee
LG Chem Ltd.
OA Round
1 (Non-Final)
67%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
813 granted / 1214 resolved
+7.0% vs TC avg
Strong +30% interview lift
Without
With
+29.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
40 currently pending
Career history
1240
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
58.5%
+18.5% vs TC avg
§102
20.3%
-19.7% vs TC avg
§112
7.1%
-32.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1214 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 . 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 1-13 and 15 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Nunome et al (KR 20200067893, cited in IDS, cited herein with identical US 20230051676) Nunome discloses the following polycarbonate (see 0141): PNG media_image1.png 396 830 media_image1.png Greyscale where In the formula, each of R1 and R2 independently represents a hydrocarbon group having a carbon number of 1 to 10, which may contain an aromatic group, each of n and m independently represents an integer of 0 or more, and each of R3 to R10 independently represents a hydrogen atom, or a hydrocarbon group having a carbon number of 1 to 20, which may contain an aromatic group (see 0091); each of R21 to R36 independently represents a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 12, which may contain an aromatic group (se 0138). Thus, all limitations of claim 1-3, 9 and 13 are met. Regarding claim 4, Nunome teaches a specific viscosity within the range of 0.18-0.23, which corresponds with claimed molecular weight range (see Table 1 at 0194). In reference to claims 5 and 7, Nunome discloses refractive index withing the range of 1.637 to 1.684 and Abbe number within the range of 17.4 to 23.8 (see Table 1 at 0194). Regarding claim 6, Nunome teaches the glass transition temperature (Tg) of the poly(ester)carbonate of is preferably from 128 to 160° C (see 0115). In reference to claim 10, Nunome discloses such precursor as diphenylcarbonate (see Example1 at 0175). Regarding claims 11 and 12, Nunome teaches such articles as lenses (see 0165). In reference to claim 15, Nunome discloses 9,9-bis[4-(2-hydroxyethoxy)phenyl]-2,3-benzofluorene (BPEB) (see Example 5 at 0183). Claims 1-13 and 15 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yamada et al (KR 20190140074, cited in IDS, cited herein with identical US 20220146713) Yamada discloses the following polycarbonate comprising the following precursors (see 0073, 086): PNG media_image2.png 188 362 media_image2.png Greyscale PNG media_image3.png 150 350 media_image3.png Greyscale Where R15 and R16 each independently represent a hydrogen atom , a hydrocarbon group of 1 to 12 carbon atoms optionally containing an aromatic group (see 0073) and PNG media_image4.png 196 360 media_image4.png Greyscale In the formula , R13 and R14 each independently represent a hydrogen atom , a hydrocarbon group of 1 to 12 carbon atoms optionally containing an aromatic group , or a halogen atom (see 0073) Thus, all limitations of claim 1-3, 9, 13 and 15 are met. Regarding claim 4, Yamada teaches a specific viscosity within the range of 0.12-0.40, which corresponds with claimed molecular weight range (see claim 5). In reference to claims 5 and 7, Nunome discloses refractive index withing the range of 1.652 to 1.704 and Abbe number within the range of 14.4 to 20.0 (see Table 3 at 0176). Regarding claim 6, Yamada teaches the glass transition temperature (Tg) of the poly(ester)carbonate of is preferably from 130 to 170 ° C. (see claim 6). In reference to claim 10, Nunome discloses such precursor as diphenylcarbonate (see Example 1 at 0168). Regarding claims 11 and 12, Yamada teaches such articles as lenses (see Abstract). Allowable Subject Matter Claim 14 objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Search for prior art does not result in a reference disclosing a polycarbonate obtained with the following precursor: PNG media_image5.png 148 312 media_image5.png Greyscale The closest prior art found is represented by et al Nunome et al (KR 20200067893, cited in IDS, cited herein with identical US 20230051676) Nunome discloses the following formula(see 0094): PNG media_image6.png 152 384 media_image6.png Greyscale The difference is that the claimed diol contains only one naphthyl substitute, while Nunome ‘s compound a-27 has two of them. Any inquiry concerning this communication or earlier communications from the examiner should be directed to GREGORY LISTVOYB whose telephone number is (571)272-6105. The examiner can normally be reached 9am-5pm EST M-F. 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, Heidi Riviere Kelley can be reached at (571) 270-1831. 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. GL /GREGORY LISTVOYB/Primary Examiner, Art Unit 1765
Read full office action

Prosecution Timeline

Dec 12, 2023
Application Filed
Jul 16, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12692347
METHOD FOR THE CONTINUOUS PREPARATION OF FORMULATED POLYAMIDE PREPOLYMERS
3y 2m to grant Granted Jul 28, 2026
Patent 12686768
POLYBUTYLENE TEREPHTHALATE COMPOSITION AND RADAR DEVICE COMPONENT THEREOF
3y 2m to grant Granted Jul 21, 2026
Patent 12679929
POLYESTER RESIN
2y 8m to grant Granted Jul 14, 2026
Patent 12674022
METHOD FOR PRODUCING ALIPHATIC POLYESTER, ALIPHATIC POLYESTER RESIN, AND ALIPHATIC POLYESTER RESIN COMPOSITION
3y 9m to grant Granted Jul 07, 2026
Patent 12662569
PROCESS FOR THE FREE RADICAL POLYMERIZATION OF THIONOLACTONES OR THIONOCARBONATES
3y 8m to grant Granted Jun 23, 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
67%
Grant Probability
96%
With Interview (+29.5%)
3y 0m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1214 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