Prosecution Insights
Last updated: July 17, 2026
Application No. 18/167,198

LDH-LIKE COMPOUND SEPARATOR AND ZINC SECONDARY BATTERY

Non-Final OA §DP
Filed
Feb 10, 2023
Priority
Dec 01, 2020 — JP 2020-199923 +1 more
Examiner
SMITH, NICHOLAS A
Art Unit
1752
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Ngk Insulators Ltd.
OA Round
2 (Non-Final)
64%
Grant Probability
Moderate
2-3
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 64% of resolved cases
64%
Career Allowance Rate
580 granted / 914 resolved
-1.5% vs TC avg
Strong +32% interview lift
Without
With
+31.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
15 currently pending
Career history
932
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
77.0%
+37.0% vs TC avg
§102
9.4%
-30.6% vs TC avg
§112
4.0%
-36.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 914 resolved cases

Office Action

§DP
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 . Response to Arguments Applicant’s arguments, see middle of p. 2, filed 10 December 2025, with respect to the rejection(s) of claim(s) 1-10 under 35 USC 102 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. In summary, Applicant correctly points out that an LDH-like separator and a layered double hydroxide (LDH)-like compound both have special definitions in the specification. In addition, the double patenting rejection over US 11545719 is withdrawn for the same reasons. However, upon further consideration, a new ground(s) of rejection is made in view of: US 20240222793 A1 18/604631 US 12519112 B2 US 20230231153 A1 18/180231 US 20230207888 A1 18/175751 US 12597677 B2 US 12614814 B2 US 12573719 B2 US 11532855 B2; all due to double patenting. Double Patenting 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. Claims 1-10 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-11 of U.S. Patent No. US 12519112 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because the reference claim has an additional limitation of a central region with a lower mean porosity. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). Claims 1-10 are rejected on the ground of nonstatutory double patenting as being unpatentable over claim of U.S. Patent No. US 12597677 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because the reference claims have additional limitations, such as the proportion of the LDH-like compound in the separator by weight. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). Claims 1-10 rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-8 of U.S. Patent No. US 12614814 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim 1 is option (c) of instant claim 2. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). Claims 1-10 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-13 of U.S. Patent No. US 12573719 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim 1 closely overlaps with option (b) of instant claim 2. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). Claims 1-10 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-9 of U.S. Patent No. US 11532855 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim contains the additional limitation of the mean porosity value. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). Claims 1-10 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-15 of copending Application No. 18/604631 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim 1 contains additional limitations of ionic conductivity values and adhesion force values. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-10 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-11 of copending Application No. 18/180231 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim 1 contains the limitation of the direction of flattened pores. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-10 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-16 of copending Application No. 18/175751 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because reference claim 1 contains the additional limitation of the electrolytic solution being an aqueous alkali metal hydroxide solution. The balance of the instant claim limitations are either explicitly in the reference claims, or implicitly (same materials having the same properties). This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to NICHOLAS A SMITH whose telephone number is (571)272-8760. The examiner can normally be reached M-F 7:30am-3:30pm. 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, Srilakshmi Kumar can be reached at (571)272-7769. 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. /NICHOLAS A SMITH/Supervisory Primary Examiner, Art Unit 1752
Read full office action

Prosecution Timeline

Feb 10, 2023
Application Filed
Sep 15, 2025
Non-Final Rejection mailed — §DP
Dec 10, 2025
Response Filed
Jun 10, 2026
Non-Final Rejection mailed — §DP (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

2-3
Expected OA Rounds
64%
Grant Probability
95%
With Interview (+31.7%)
3y 3m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 914 resolved cases by this examiner. Grant probability derived from career allowance rate.

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