Prosecution Insights
Last updated: October 24, 2026
Application No. 18/685,309

DOUBLE METAL CYANIDE CATALYST, METHOD FOR PREPARING SAME AND METHOD FOR PREPARING POLYALKYLENE CARBONATE USING THE CATALYST

Non-Final OA §112§DOUBLEPATENT
Filed
Feb 21, 2024
Priority
Sep 08, 2021 — RE 10-2021-0119702 +1 more
Examiner
SERGENT, RABON A
Art Unit
1765
Tech Center
1700 — Chemical & Materials Engineering
Assignee
LG Chem Ltd.
OA Round
1 (Non-Final)
55%
Grant Probability
Moderate
1-2
OA Rounds
11m
Est. Remaining
79%
With Interview

Examiner Intelligence

Grants 55% of resolved cases
55%
Career Allowance Rate
556 granted / 1009 resolved
-9.9% vs TC avg
Strong +24% interview lift
Without
With
+24.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
37 currently pending
Career history
1058
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
35.3%
-4.7% vs TC avg
§102
15.4%
-24.6% vs TC avg
§112
37.5%
-2.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1009 resolved cases

Office Action

§112 §DOUBLEPATENT
Detailed Office Action Notice of Pre-AIA or AIA Status 1. The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Indefiniteness Rejection 2. The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. 3. Claims 9, 10, and 12 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. With respect to claims 9 and 12, it is unclear how to distinguish the complexing agent of claim 1 and the auxiliary complexing agent. Double Patenting Rejections 4. The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. 5. Claims 13 and 14 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1, 2, 4, and 5 of copending Application No. 18/277,054 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because each claim set is drawn to a method of polymerizing, wherein the instant catalyst composition is utilized. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. 6. Claim 13 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 20 of copending Application No. 19/106,458 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because each claim set is drawn to a method of polymerizing, wherein the instant catalyst composition is utilized. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. 7. Claim 13 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 19 of copending Application No. 19/106,524 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because each claim set is drawn to a method of polymerizing, wherein the instant catalyst composition is utilized. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. 8. Claim 13 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 19 of copending Application No. 19/147,980 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because each claim set is drawn to a method of polymerizing, wherein the instant catalyst composition is utilized. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. 9. Claim 13 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 17 of copending Application No. 19/527,812 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because each claim set is drawn to a method of polymerizing, wherein the instant catalyst composition is utilized. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter 10. Claims 1-8 and 11 are allowed. 11. Claims 9, 10, and 12 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. 12. The prior art of record fails to disclose the claimed double metal cyanide catalyst comprising the claimed double metal cyanide compound and the compound of Formula 1 incorporated within the catalyst as complexing agent. Conclusion 13. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Rabon A Sergent whose telephone number is (571)272-1079. The examiner can normally be reached on Monday through Friday from 9:00 AM until 5:00 PM, ET. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Heidi Riviere Kelley, can be reached at telephone number 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 an application may be obtained from Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center to authorized users only. Should you have questions about access to the USPTO patent electronic filing system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via a variety of formats. See MPEP § 713.01. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) Form at https://www.uspto.gov/InterviewPractice. /RABON A SERGENT/Primary Examiner, Art Unit 1765
Read full office action

Prosecution Timeline

Feb 21, 2024
Application Filed
Oct 02, 2026
Non-Final Rejection mailed — §112, §DOUBLEPATENT (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12753270
EPOXY RESIN CURING AGENT, EPOXY RESIN COMPOSITION, AND PAINT
3y 0m to grant Granted Oct 06, 2026
Patent 12747322
GREEN SYNTHESIS OF AMINO ACID BASED POLY(ESTER UREA)S
2y 10m to grant Granted Sep 29, 2026
Patent 12742041
DUAL CATALYST SYSTEM FOR MASS VINYL ADDITION AND CATIONIC POLYMERIZABLE COMPOSITIONS
3y 7m to grant Granted Sep 22, 2026
Patent 12723124
STORAGE-STABLE POLYISOCYANATE COMPOSITION AND PREPARATION METHOD THEREFOR
3y 7m to grant Granted Sep 01, 2026
Patent 12715954
POLYCARBAMATE SYNTHESIS VIA CHAIN-GROWTH COPOLYMERIZATION
3y 9m to grant Granted Aug 25, 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
55%
Grant Probability
79%
With Interview (+24.1%)
3y 7m (~11m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1009 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