Prosecution Insights
Last updated: October 01, 2026
Application No. 18/450,617

LITHIUM-ION CELLS INCLUDING A COATED CURRENT COLLECTOR AND METHODS OF FORMING THE SAME

Non-Final OA §102
Filed
Aug 16, 2023
Examiner
ESSEX, STEPHAN J
Art Unit
1727
Tech Center
1700 — Chemical & Materials Engineering
Assignee
GM Global Technology Operations LLC
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
7m
Est. Remaining
49%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
456 granted / 693 resolved
+0.8% vs TC avg
Minimal -16% lift
Without
With
+-16.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
26 currently pending
Career history
724
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
64.5%
+24.5% vs TC avg
§102
17.2%
-22.8% vs TC avg
§112
14.3%
-25.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 693 resolved cases

Office Action

§102
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 Applicant's election with traverse of Species I, claims 1-11 and 14-20, in the reply filed on May 4, 2026 is acknowledged. The traversal is on the ground(s) that search and examination of claims 12 and 13 will not require different fields of search or result in inapplicable prior art across different species. This is not found persuasive because references which disclose a polymer spin coating or spraying process do not necessarily also disclose a polymer electroplating process. The closest prior art of Jang, cited by Applicant, discloses a polymer spraying process but does not disclose a polymer electroplating process. The requirement is still deemed proper and is therefore made FINAL. 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. Claims 1, 4, 5, 7-11, 15, 16, 18 and 19 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Jang (U.S. Pub. No. 2022/0190346 A1, cited by Applicant). Regarding claims 1 and 9, Jang teaches a lithium secondary battery comprising a cathode, an anode, and a separator-electrolyte assembly (electrolyte) disposed between the cathode and the anode, wherein the anode comprises: (a) an anode current collector (current collector); and (b) a thin layer of a high-elasticity polymer composite (deformable layer) in ionic contact with the electrolyte and disposed between the anode current collector and the electrolyte (see paragraph 59). During a first charging procedure of the lithium battery, lithium comes out of the cathode active material (lithium intercalation material), migrates to the anode side, passes through the high-elasticity polymer composite layer and deposits on the anode current collector (lithium metal anode) (see paragraph 67). Regarding claims 4 and 15, Jang teaches that the polymer composite has a thickness from 1 nm to 100 μm (see paragraph 59). Regarding claims 5 and 16, Jang teaches that the high-elasticity polymer may form a mixture, blend, or semi-interpenetrating network with an electron-conducting polymer selected from polyaniline, polypyrrole, polythiophene, derivatives thereof, or a combination thereof (see paragraph 104). Regarding claims 7 and 18, Jang teaches that the high-elasticity polymer can be mixed with a broad array of materials including carbon nanotubes or graphene sheets (see paragraph 99). Regarding claim 8 and 19, Jang teaches that the high-elasticity polymer can be mixed with a broad array of materials including elastomers (see paragraph 99). Regarding claim 10, Jang teaches that polymer layer formation can be accomplished by using one of several procedures well-known in the art such as spraying (see paragraph 89). Regarding claim 11, as spray coating processes are well known in the art, it is well within the ambit of the ordinary artisan to control the thickness of the polymer layer of Jang during a spray formation thereof by controlling a viscosity and concentration of the polymer material and controlling a rotational speed of the current collector and a duration of deposition of the polymeric material. Allowable Subject Matter Claim 20 is allowed. Claims 2, 3, 6, 14 and 17 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 STEPHAN J ESSEX whose telephone number is (571)270-7866. The examiner can normally be reached Monday - Friday, 8:30 am - 6:00 pm. 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. /STEPHAN J ESSEX/Primary Examiner, Art Unit 1727
Read full office action

Prosecution Timeline

Aug 16, 2023
Application Filed
Aug 26, 2026
Non-Final Rejection mailed — §102
Sep 29, 2026
Interview Requested

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12749707
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY POROUS LAYER
3y 9m to grant Granted Sep 29, 2026
Patent 12749756
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2y 11m to grant Granted Sep 29, 2026
Patent 12744221
PASSIVATION MATERIALS ON ALKALINE EARTH METALS
3y 3m to grant Granted Sep 22, 2026
Patent 12738534
ALLOY FORMATION METHOD FOR A SOLID-STATE BATTERY AND THE SOLID-STATE BATTERY THEREOF
2y 11m to grant Granted Sep 15, 2026
Patent 12729135
Positive Electrode Active Material for Lithium Secondary Battery and Method of Preparing the Same
4y 2m to grant Granted Sep 08, 2026
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
66%
Grant Probability
49%
With Interview (-16.4%)
3y 8m (~7m remaining)
Median Time to Grant
Low
PTA Risk
Based on 693 resolved cases by this examiner. Grant probability derived from career allowance rate.

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