Prosecution Insights
Last updated: May 29, 2026
Application No. 18/320,596

COMPOSITE SOLID ELECTROLYTE FOR SECONDARY BATTERY, SECONDARY BATTERY COMPRISING SAME, AND METHOD OF PREPARING SAME

Non-Final OA §102§103
Filed
Jun 16, 2023
Priority
Nov 20, 2020 — RE 10-2020-0156929 +1 more
Examiner
MARTIN, ANGELA J
Art Unit
1727
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Samsung Electronics Co., Ltd.
OA Round
1 (Non-Final)
67%
Grant Probability
Favorable
1-2
OA Rounds
1y 0m
Est. Remaining
35%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
588 granted / 872 resolved
+2.4% vs TC avg
Minimal -32% lift
Without
With
+-32.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 12m
Avg Prosecution
52 currently pending
Career history
950
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
85.3%
+45.3% vs TC avg
§102
12.7%
-27.3% vs TC avg
§112
1.0%
-39.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 872 resolved cases

Office Action

§102 §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 Election/Restrictions Claims 17-32 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected battery and method of making a battery, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 3/18/2026. Applicant’s election without traverse of Group I (claims 1-16) in the reply filed on 3/18/2026 is acknowledged. 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)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-6, 9-11, 13, 15, 16 is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Kim et al., US 2014017576. Regarding claim 1, Kim et al., teaches a composite solid electrolyte (0082) for a secondary battery (0122), wherein the secondary battery comprises an anode (0019-0021), wherein the composite solid electrolyte (0069-0071) comprises a first solid electrolyte (0069-0071) comprising a first compound represented by Formula 1 (0011-0016), and a second solid electrolyte comprising a second compound represented by Formula 2, and wherein the first solid electrolyte is disposed adjacent to the anode: Formula 1 Li1+x+2yAlxMgyM12-x-y(PO4)3wherein, in Formula 1, M1 is germanium (Ge), zirconium (Zr), hafnium (Hf), tin (Sn), or a combination thereof, and 0<x<0.6 and 0<y<0.2, Formula 2 Li1+x+2yAlxMgyM22-x-y(PO4)3wherein, in Formula 2 (0161), M2 is titanium (Ti), germanium (Ge), zirconium (Zr), hafnium (Hf), tin (Sn), or a combination thereof, and 0<x<0.6 and 0≤y<0.2 (0161-0163). Regarding claim 2, Kim et al., teaches wherein in Formula 1, M1 is germanium (Ge) (0011-0012; 0027; 0048). Regarding claim 3, Kim et al., teaches wherein in Formula 1, 0.1≤x≤0.5 and 0.01≤y≤0.1 (0011-0016). Regarding claim 4, Kim et al., teaches wherein in Formula 2, M2 is hafnium (Hf) (0011; 0027; 0048; 0061) or tin (Sn) (0011; 0027; 0048; 0061). Regarding claim 5, Kim et al., teaches wherein in Formula 2, y>0, or 0.1≤x≤0.5 and 0.01≤y≤0.1 (0011-0016). Regarding claim 6, Kim et al., teaches wherein in Formula 2, M2 is titanium (Ti) (0011-0016). Regarding claim 9, Kim et al., teaches wherein particles of each of the first solid electrolyte and the second solid electrolyte are in contact with each other, and interlayer particles at a boundary between the first solid electrolyte and the second solid electrolyte are in contact with each other (0041; 0069-0071; 0077; 0102; 0163). Regarding claim 10, Kim et al., teaches wherein the first compound represented by Formula 1 is Li1.2Al0.1Mg0.05Ge1.85(PO4)3, Li1.3Al0.2Mg0.05Ge1.75(PO4)3, Li1.4Al0.3Mg0.05Ge1.65(PO4)3, Li1.4Al0.2Mg0.1Ge1.7(PO4)3, Li1.2Al0.1Mg0.05Zr1.85(PO4)3, Li1.3Al0.2Mg0.05Zr1.75(PO4)3, Li1.4Al0.3Mg0.05Zr1.65(PO4)3, Li1.4Al0.2Mg0.1Zr1.7(PO4)3, Li1.2Al0.1Mg0.05Hf1.85(PO4)3, Li1.3Al0.2Mg0.05Hf1.75(PO4)3, Li1.4Al0.3Mg0.05Hf1.65(PO4)3, Li1.4Al0.2Mg0.1Hf1.7(PO4)3, Li1.2Al0.1Mg0.05Sn1.85(PO4)3, Li1.3Al0.2Mg0.05Sn1.75(PO4)3, Li1.4Al0.3Mg0.05Sn1.65(PO4)3, Li1.4Al0.2Mg0.1Sn1.7(PO4)3, or a combination thereof (0009-0020; 0027). Regarding claim 11, Kim et al., teaches wherein the second compound represented by Formula 2 is Li1.3Al0.2Mg0.05Ti1.75(PO4)3, Li1.2Al0.1Mg0.05Ti1.85(PO4)3, Li1.4Al0.3Mg0.05Ti1.65(PO4)3, Li1.4Al0.2Mg0.1Ti1.7(PO4)3,Li1.3Al0.2Mg0.05Ge1.75(PO4)3, Li1.2Al0.1Mg0.05Ge1.85(PO4)3, Li1.4Al0.3Mg0.05Ge1.65(PO4)3, Li1.4Al0.2Mg0.1Ge1.7(PO4)3,Li1.3Al0.2Mg0.05Zr1.75(PO4)3, Li1.2Al0.1Mg0.05Zr1.85(PO4)3, Li1.4Al0.3Mg0.05Zr1.65(PO4)3, Li1.4Al0.2Mg0.1Zr1.7(PO4)3,Li1.3Al0.2Mg0.05Hf1.75(PO4)3, Li1.2Al0.1Mg0.05Hf1.85(PO4)3, Li1.4Al0.3Mg0.05Hf1.65(PO4)3, Li1.4Al0.2Mg0.1Hf1.7(PO4)3,Li1.3Al0.2Mg0.05Sn1.75(PO4)3, Li1.2Al0.1Mg0.05Sn1.85(PO4)3, Li1.4Al0.3Mg0.05Sn1.65(PO4)3, Li1.4Al0.2Mg0.1Sn1.7(PO4)3,Li1.5Al0.5Ge1.5(PO4)3, Li1.5Al0.5Ti1.5(PO4)3, Li1.5Al0.5Zr1.5(PO4)3, Li1.5Al0.5Hf1.5(PO4)3, Li1.5Al0.5Sn1.5(PO4)3, or a combination thereof (0027). Regarding claim 13, Kim et al., teaches wherein the composite solid electrolyte further comprises a third electrolyte comprising a third compound represented by Formula 1, wherein the third solid electrolyte is disposed adjacent to the cathode: Formula 1 Li1+x+2yAlxMgyM12-x-y(PO4)3wherein in Formula 1, M1 is germanium (Ge), zirconium (Zr), hafnium (Hf), tin (Sn), or a combination thereof, and 0<x<0.6 and 0<y<0.2. Regarding claim 15, Kim et al., teaches wherein the anode is an oxide anode. Regarding claim 16, Kim et al., teaches wherein in the composite solid electrolyte, the first solid electrolyte comprises Li1.2Al0.1Mg0.05Ge1.85(PO4)3, Li1.3Al0.2Mg0.05Ge1.75(PO4)3, Li1.4Al0.3Mg0.05Ge1.65(PO4)3, Li1.4Al0.2Mg0.1Ge1.7(PO4)3, or a combination thereof, and the second solid electrolyte comprises Li1.3Al0.2Mg0.05Ti1.75(PO4)3, Li1.2Al0.1Mg0.05Ti1.85(PO4)3, Li1.4Al0.3Mg0.05Ti1.65(PO4)3, Li1.4Al0.2Mg0.1Ti1.7(PO4)3,Li1.3Al0.2Mg0.05Hf1.75(PO4)3, Li1.2Al0.1Mg0.05Hf1.85(PO4)3, Li1.4Al0.3Mg0.05Hf1.65(PO4)3, Li1.4Al0.2Mg0.1Hf1.7(PO4)3,Li1.3Al0.2Mg0.05Zr1.75(PO4)3, Li1.2Al0.1Mg0.05Zr1.85(PO4)3, Li1.4Al0.3Mg0.05Zr1.65(PO4)3, Li1.4Al0.2Mg0.1Zr1.7(PO4)3,Li1.3Al0.2Mg0.05Sn1.75(PO4)3, Li1.2Al0.1Mg0.05Sn1.85(PO4)3, Li1.4Al0.3Mg0.05Sn1.65(PO4)3, Li1.4Al0.2Mg0.1Sn1.7(PO4)3,Li1.5Al0.5Ge1.5(PO4)3, or a combination thereof (0009-0016; 0027; 0048-0060). Thus, the claims are anticipated. 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. Claim(s) 7-8, 12, 14 is/are rejected under 35 U.S.C. 103 as being unpatentable over Kim et al., US 2014017576. Regarding claim 7, Kim et al., does not teach wherein a ratio of a thickness of the first solid electrolyte and a thickness of the second solid electrolyte is 1:5 to 1:100. However, "[W]here the general conditions of a claim are disclosed in the prior art, it is not inventive to discover the optimum or workable ranges by routine experimentation." In re Aller, 220 F.2d 454, 456, 105 USPQ 233, 235 (CCPA 1955). Regarding claim 8, Kim et al., does not teach wherein a thickness of the first solid electrolyte is 1 micrometer to 30 micrometers, and a thickness of the second solid electrolyte is 50 micrometers to 500 micrometers. However, "[W]here the general conditions of a claim are disclosed in the prior art, it is not inventive to discover the optimum or workable ranges by routine experimentation." In re Aller, 220 F.2d 454, 456, 105 USPQ 233, 235 (CCPA 1955). Regarding claim 12, Kim et al., teaches wherein the composite solid electrolyte has an ionic conductivity of 10-5 Siemens per centimeter or greater at 25°C (0033-0034; Fig. 5). Kim does not teach a degree of densification of 70% to 99%. However, A prima facie case of obviousness may be made when chemical compounds have very close structural similarities and similar utilities. "An obviousness rejection based on similarity in chemical structure and function entails the motivation of one skilled in the art to make a claimed compound, in the expectation that compounds similar in structure will have similar properties." In re Payne, 606 F.2d 303, 313, 203 USPQ 245, 254 (CCPA 1979). See In re Papesch, 315 F.2d 381, 137 USPQ 43 (CCPA 1963. Regarding claim 14, Kim et al., teaches, wherein the third solid electrolyte is present in an amount of 1 part by weight to 30 parts by weight with respect to 100 parts by weight of a total weight of the composite solid electrolyte. Kim et al., teaches that “It will be understood that, although the terms "first," "second," "third" etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, "a first element," "component," "region," "layer" or "section" discussed below could be termed a second element, component, region, layer or section without departing from the teachings herein.” (0041). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANGELA J MARTIN whose telephone number is (571)272-1288. The examiner can normally be reached 7am-4pm. 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, Barbara Gilliam can be reached at 571-272-1330. 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. ANGELA J. MARTIN Examiner Art Unit 1727 /ANGELA J MARTIN/Examiner, Art Unit 1727
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Prosecution Timeline

Jun 16, 2023
Application Filed
Apr 07, 2026
Non-Final Rejection mailed — §102, §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
67%
Grant Probability
35%
With Interview (-32.2%)
3y 12m (~1y 0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 872 resolved cases by this examiner. Grant probability derived from career allowance rate.

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