Prosecution Insights
Last updated: July 17, 2026
Application No. 18/019,439

SOLID ELECTROLYTE MEMBRANE AND SOLID-STATE BATTERY INCLUDING THE SAME

Non-Final OA §103
Filed
Feb 02, 2023
Priority
Aug 20, 2020 — RE 10-2020-0104846 +1 more
Examiner
NGUYEN, KEVIN NMN
Art Unit
1752
Tech Center
1700 — Chemical & Materials Engineering
Assignee
LG Energy Solution Ltd.
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
45 granted / 54 resolved
+18.3% vs TC avg
Moderate +14% lift
Without
With
+13.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
24 currently pending
Career history
97
Total Applications
across all art units

Statute-Specific Performance

§103
91.8%
+51.8% vs TC avg
§102
4.9%
-35.1% vs TC avg
§112
1.5%
-38.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 54 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 . Election/Restrictions Claims 8-10 withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Applicant’s election without traverse of Group I, claims 1-7 and 11-15 in the reply filed on 04/28/2026 is acknowledged. Priority Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. Information Disclosure Statement The information disclosure statements (IDSs) submitted on 02/02/2023, 03/18/2024, 03/11/2025, and 03/14/2025, are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. Drawings The drawings received on 02/02/2023 were reviewed and are acceptable. Specification The specification filed on 02/02/2023 was reviewed and is acceptable. Claim Objections Claim 2 is objected to because of the following informalities: “2 to -50 nm” in line 2 should be replaced with –2 to 50 nm--. Claim 3 is objected to because of the following informalities: “0.5 to -5 µm” in line 2 should be replaced with –0.5 to 5 µm--. Appropriate correction is required. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 1-7 and 11-15 is/are rejected under 35 U.S.C. 103 as being unpatentable over Xu et al. (US 20190288331 A1, hereinafter Xu, cited in Notice of References Cited dated 03/06/2026). Regarding Claim 1, Xu discloses the limitations for a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]) for a solid-state battery (Xu, Li-battery, [0030]), the solid electrolyte membrane comprising composite particles and a polymeric solid electrolyte material (Xu, the solid-state electrolyte includes a composite synthesized from an MOF material soaked in a liquid electrolyte, and may include a polyethylene oxide (PEO) binder, [0012, 0027]), wherein the composite particles comprise porous particles having a plurality of pores (Xu, the solid-state electrolyte comprises MOF, wherein the MOFs being a class of crystalline porous solid constructed from metal cluster nodes and organic linkers, [0012]) and a phase transformation material (Xu, the non-aqueous liquid electrolyte solvents comprise ethylene carbonate (EC), [0016]; as evidenced in Instant Specification Page 14, Lines 5-10, ethylene carbonate may be the phase transformation material), the phase transformation material exists in a solid state at room temperature or lower and undergoes a phase change into a liquid state by an increase in temperature, and all or at least a part of the pores are filled with the phase transformation material (Xu, the electrolyte infiltrates into at least some of the pores of the MOFs, and become immobilized therein to form the ionic conducting channels, [0023]). it would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to recognize that the ethylene carbonate of Xu would also phase change, as claimed, since the phase change material may be ethylene carbonate, as noted above. Regarding Claim 2, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]) wherein the porous particles have a pore diameter in a range of from 2 to 50 nm (Xu, MIL-100-Al has a pore size of 2.5, 2.9 nm, Table 1; the disclosed pore sizes of 2.5 and 2.9 nm falls within the claimed range of 2 to 50 nm). Regarding Claim 3, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]), wherein the porous particles have a diameter in a range of from 0.5 to 5 µm (Xu, SEM image of MIL-100-Al shows that the particle diameter is approximately 0.8 µm, [0051], Annotated Figure 10F below; the disclosed particle diameter of approximately 0.8 µm falls within the claimed range of 0.5 to 5 µm). PNG media_image1.png 279 285 media_image1.png Greyscale Regarding Claim 4, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]), wherein the porous particles comprise a metal organic framework, which comprises of at least one or more selected from the group consisting of MIL-100 (Xu, MIL-100-Al, Table 1) and Cu-BTC (Xu, HKUST-1 is a MOF constructed from Cu (II) paddle wheels and benzene-1,3,5-tricarboxylate (BTC) ligands (linkers), [0090]). Regarding Claim 5, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]) wherein the phase transformation material comprises at least one or more selected from the group consisting of ethylene carbonate (Xu, the non-aqueous liquid electrolyte solvents comprise ethylene carbonate (EC), [0016]). Regarding Claim 6, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid electrolyte membrane (Xu, solid-state electrolyte composite membrane, [0028]) wherein the polymeric solid electrolyte material (Xu, a binder mixed with the solid-state electrolyte, [0105]) comprises a polymer resin (Xu, the binder comprises polyethylene oxide (PEO), polymethylmethacrylate (PMMA), or copolymers thereof, [0107]) and a lithium salt (Xu, the liquid electrolyte comprises a metal salt dissolved in one or more non-aqueous solvents, wherein the metal salt may be a lithium salt, [0095, 0097]). As evidenced in Instant Specification Page 9, Lines 16-17, the polymer resin may be polyethylene oxide. Regarding Claim 7 and 11-15, Xu discloses all of the claim limitations as set forth above. Xu discloses the limitations regarding a solid-state battery (Xu, a lithium battery, [0108-0109]) comprising a negative electrode, a positive electrode and a solid electrolyte membrane (Xu, a composite electrolyte membrane; a positive electrode; and a negative electrode, wherein the composite electrolyte membrane is disposed between the positive electrode and the negative electrode, [0108]). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: US 20190348657 A1 discloses a membrane layer comprising a metal-organic framework [0084]. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KEVIN NGUYEN whose telephone number is (703)756-1745. The examiner can normally be reached Monday-Thursday 9:50 - 7:50 ET. 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, NICHOLAS A SMITH can be reached at (571) 272-8760. 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. /K.N./Examiner, Art Unit 1752 /OSEI K AMPONSAH/Primary Examiner, Art Unit 1752
Read full office action

Prosecution Timeline

Feb 02, 2023
Application Filed
May 18, 2026
Non-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

1-2
Expected OA Rounds
83%
Grant Probability
97%
With Interview (+13.9%)
3y 2m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 54 resolved cases by this examiner. Grant probability derived from career allowance rate.

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