Prosecution Insights
Last updated: August 17, 2026
Application No. 18/688,291

METHOD FOR PRODUCING ACRYLIC ACID AND/OR GLYCOLIDE

Non-Final OA §102§Other
Filed
Feb 29, 2024
Priority
May 31, 2022 — RE 10-2022-0066503 +5 more
Examiner
HUSON, MONICA ANNE
Art Unit
Tech Center
Assignee
LG Chem Ltd.
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
6m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
1093 granted / 1375 resolved
+19.5% vs TC avg
Moderate +14% lift
Without
With
+13.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 12m
Avg Prosecution
41 currently pending
Career history
1410
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
45.4%
+5.4% vs TC avg
§102
20.3%
-19.7% vs TC avg
§112
19.6%
-20.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1375 resolved cases

Office Action

§102 §Other
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. Claim(s) 1 and 5-9 is/are rejected under 35 U.S.C. 102a1 as being anticipated by van Walsem et al. (U.S. Patent Application Publication 2012/0315681). Regarding Claim 1, van Walsem et al., hereafter “van Walsem,” show that it is known to carry out a method for producing acrylic acid and/or glycolide comprising thermally decomposing a hydroxyalkanoate copolymer in the presence of a catalyst containing tin (0003, 0006, 0014-0016). Regarding Claim 5, van Walsem shows the process of claim 1 above, including one wherein the thermal decomposition is performed under a solvent-free condition (0141). Regarding Claim 6, van Walsem shows the process of claim 1 above, including one wherein: the hydroxyalkanoate copolymer comprises 3-hydroxypropionic acid-derived repeating units and glycolide-derived repeating units (0006). Regarding Claim 7, van Walsem shows the process of claim 1 above, including one wherein: the hydroxyalkanoate copolymer is a 3-hydroxypropionate-lactide copolymer (0047). Regarding Claim 8, van Walsem shows the process of claim 7 above, including one wherein: the thermal decomposition thermally decomposing a hydroxyalkanoate copolymer in the presence of a catalyst containing tin comprises, thermally decomposing the 3-hydroxypropionate-lactide copolymer in the presence of the catalyst containing tin to produce acrylic acid (0014-0015, 0047). Regarding Claim 9, van Walsem shows the process of claim 8 above, including one wherein the thermal decomposition is performed at a temperature of 200-350C (0007). Allowable Subject Matter Claims 2-4 and 10-19 are 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MONICA HUSON whose telephone number is (571)272-1198. The examiner can normally be reached M-F 8a-4p. 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, Christina Johnson can be reached at 571-272-1176. 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. MONICA ANNE HUSON Primary Examiner Art Unit 1742 /MONICA A HUSON/Primary Examiner, Art Unit 1742
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Prosecution Timeline

Feb 29, 2024
Application Filed
Jul 23, 2026
Non-Final Rejection mailed — §102, §Other (current)

Precedent Cases

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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
80%
Grant Probability
93%
With Interview (+13.6%)
2y 12m (~6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1375 resolved cases by this examiner. Grant probability derived from career allowance rate.

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