Prosecution Insights
Last updated: October 02, 2026
Application No. 18/385,786

BRANCHED POLY(LACTIC ACID-3-HYDROXYPROPIONIC ACID)COPOLYMER AND METHOD FOR PREPARATION THEREOF

Final Rejection §103
Filed
Oct 31, 2023
Priority
May 06, 2021 — RE 10-2021-0058539 +3 more
Examiner
LISTVOYB, GREGORY
Art Unit
Tech Center
Assignee
LG Chem Ltd.
OA Round
2 (Final)
67%
Grant Probability
Favorable
3-4
OA Rounds
1m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
814 granted / 1217 resolved
+6.9% vs TC avg
Strong +30% interview lift
Without
With
+29.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
43 currently pending
Career history
1243
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
58.8%
+18.8% 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 1217 resolved cases

Office Action

§103
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 . The previous prior art rejection under Torii (US 2006/0006368), Sookraj et al (US 201800155490) and Kamada et al (US 20160280849) maintained and therefore it is proper to make this rejection FINAL. 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. Claims 1-7 are rejected under 35 U.S.C. 103 as being unpatentable over Torii (US 2006/0006368), cited in previous Office Action. Claims 1 and 4-7 are rejected under 35 U.S.C. 103 as being unpatentable over Sookraj et al (US 201800155490), cited in IDS. Claims 1-7 are rejected under 35 U.S.C. 103 as being unpatentable over Kamada et al (US 20160280849), cited in IDS Amendment to claim 1 is noted. The added limitation represents product-by-process. Since Torii's, Kamada, Sookraj and Application’s polymers are identical, the process of Application’s polymer making is unpatentable (see MPEP 2113). The process of claim 1 does not convey any patentable distinct features to the product. "Even though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process" In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985). See Also In re Fessmann, 489 F.2d 742, 744, 180 USPQ 324, 326 (CCPA 1974), In re Marosi, 710 F.2d 798, 802, 218 USPQ 289, 292 (Fed. Cir. 1983), In re Brown, 459 F.2d 531, 535, 173 USPQ 685, 688 (CCPA 1972). Therefore, it would have been obvious to a person of ordinary skills in the art before the effective filing date of the invention to expect the same properties from Torii's, Kamada, Sookraj and Application’s polymers unless unexpected results are demonstrated. The rejection can be found in the NON-FINAL office action mailed 5/19/2026 and is herein incorporated by reference Response to Arguments Applicant's arguments filed 8/3/2026 have been fully considered but they are not persuasive. Applicant submits that neither Torii nor Sookraj teaches lactide ring opening polymerization. However, as discussed in the rejection above, independent claim 1 and dependent claims 2-7 drawn to a composition, while the limitation regarding ROP related to a process of making a polymer. Applicant submits that in contrary to prior art patents sited by Examiner, the inventive polymer has excellent mechanical properties and good processability. Examiner recommends that direct comparison of Applicant’s and cited prior references polymer properties can be provided in form of Declaration in order to demonstrate unexpected results. Applicant submits that Kamada does not teach a claimed copolymer with structures including a branched poly(3-hydroxypropionic acid) and a poly(lactic acid). However, Kamada discloses ring opening polymerization of variety monomers, which include both lactide and propiolactone (see Table 1-1-1 at 0308). A genus does not always anticipate a claim to a species within the genus. However, when the species is clearly named, the species claim is anticipated no matter how many other species are additionally named. Ex parte A, 17 USPQ2d 1716 (Bd. Pat. App. & Inter. 1990) See also MPEP 2131.02 Conclusion THIS ACTION IS MADE FINAL. 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 nonprovisional extension fee (37 CFR 1.17(a)) 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 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

Oct 31, 2023
Application Filed
May 19, 2026
Non-Final Rejection mailed — §103
Aug 03, 2026
Response Filed
Sep 09, 2026
Final Rejection mailed — §103 (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

3-4
Expected OA Rounds
67%
Grant Probability
96%
With Interview (+29.6%)
3y 0m (~1m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1217 resolved cases by this examiner. Grant probability derived from career allowance rate.

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