Prosecution Insights
Last updated: October 01, 2026
Application No. 18/449,016

DOUBLE-WALLED ENCLOSURE AND/OR COOLING SYSTEM FOR PRISMATIC BATTERY CELLS

Non-Final OA §103
Filed
Aug 14, 2023
Examiner
SLIFKA, SARAH A
Art Unit
1759
Tech Center
1700 — Chemical & Materials Engineering
Assignee
GM Global Technology Operations LLC
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
87%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
535 granted / 709 resolved
+10.5% vs TC avg
Moderate +11% lift
Without
With
+11.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
21 currently pending
Career history
722
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
56.1%
+16.1% vs TC avg
§102
17.1%
-22.9% vs TC avg
§112
22.5%
-17.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 709 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 Applicant’s election of Group I, claims 1-10 in the reply filed on 06/17/2026 is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). In the response, claim 10 is currently withdrawn. This is considered to be a typo as the claim was positively elected in the response and belongs to the elected group. The claim will be treated, below, and examiner recommends changing the status identifier. If the withdrawal is correct, the rejection will be removed in the next action. Clarification is requested. See MPEP 714 II. C. Amendments to the Claims (A) Status Identifiers and (B) Markings to Show the Changes. 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. Claim(s) 1-10 is/are rejected under 35 U.S.C. 103 as being unpatentable over Dobi et al (WO 2022/223666). Regarding claim 1, Dobi teaches a battery cell 10 having an inner casing and being inserted into an outer casing as shown in figure 1b (pg 4, lines 270pg 5, line 4). Figures 1a and 4 shows the outer casing having a top plate 13 and a bottom plate 12. The battery cell is an electrochemical cell (pg 3, lines 13-15). Dobi does not explicitly teach the battery cell stack, as claimed. However, it would have been obvious to one of ordinary skill in the art before the effective date of the claimed invention to utilize a battery cell stack including anode electrodes, cathode electrodes, and separators insofar as that is a standard battery cell stack. Regarding claim 2, Dobi teaches multiple ridges in the shape of elongated protrusions are provided along each longer side wall 11a and 11b (pg 3, lines 19-25 and figure 1a). The protrusions are considered to be the instantly claimed stiffening portions. Regarding claim 3, Dobi teaches multiple ridges in the shape of elongated protrusions are provided along each longer side wall 11a and 11b (pg 3, lines 19-25 and figure 1a). Dobi does not explicitly teach the pattern of the ridges on the second side (namely 11b) to have a different pattern than that of the first side (namely 11a). Dobi teaches the ridges are configured to mechanically interlock to an adjacently arranged battery cell. Figures 2-4 show an exemplified dove-tailed configuration with adjacent cells having different patterns in order to interlock (pg 3, lines 19-25 and figures 2-4). It would have been obvious to one of ordinary skill in the art before the effective date of the claimed invention to utilize the different patterns on sides 11a and 11b of a single cell rather than different patterns on adjacent cells as a matter of design choice dependent upon the specific interlocking design desired. Regarding claim 4, Dobi teaches the ridges are configured to mechanically interlock to an adjacently arranged battery cell. Figures 2-4 show an exemplified dove-tailed configuration (pg 3, lines 19-25 and figures 2-4). Regarding claim 5, Dobi teaches multiple ridges in the shape of elongated protrusions are provided along each longer side wall 11a and 11b (pg 3, lines 19-25 and figure 1a), as discussed above. The protrusions are considered to be the instantly claimed stiffening portions. Dobi does not explicitly teach stiffening portions comprising dimples or beads, as claimed. It would have been obvious to one of ordinary skill in the art before the effective date of the claimed invention to utilize any shape of the stiffening portion dependent upon design choice. Regarding claim 6, Dobi teaches multiple ridges in the shape of elongated protrusions are provided along each longer side wall 11a and 11b (pg 3, lines 19-25 and figure 1a), as discussed above. The protrusions are considered to be the instantly claimed stiffening portions. Dobi does not explicitly teach stiffening portions comprising dimples or beads, as claimed. It would have been obvious to one of ordinary skill in the art before the effective date of the claimed invention to utilize any shape of the stiffening portion dependent upon design choice. Regarding claim 7, Dobi teaches using a thermally conductive potting material between the battery cells (pg 6, lines 20-25). Regarding claim 8, Dobi teaches a battery cell 10 having an inner casing and being inserted into an outer casing as shown in figure 1b (pg 4, lines 270pg 5, line 4). The battery cell having an inner casing is shown to have a top and bottom closure which is considered to constitute the instantly claimed second lid and bottom portion. Regarding claim 9, Dobi teaches the battery as discussed above. Dobi does not explicitly teach the lid or bottom portion to include a vent. However, it would have been obvious to one of ordinary skill in the art before the effective date of the claimed invention to utilize a vent in the top or bottom to release gas or pressure as is extremely well known in the art and would have been well within the purview of an ordinarily skilled artisan without undue experimentation and with an extremely reasonable expectation of success. Regarding claim 10, Dobi teaches a battery pack in figure 4 including a plurality of cells, as discussed above. Dobi teaches using a thermally conductive potting material between the battery cells to improve thermal conductivity and enhance cooling of the battery cells when using a cooling plate which may be positioned adjacent to the bottom plate of the battery cells (pg 6, lines 20-25). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARAH A SLIFKA whose telephone number is (571)270-5838. The examiner can normally be reached Monday-Friday 9am-5:30pm EST. 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, Curtis Mayes can be reached at 571-272-1234. 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. /SARAH A. SLIFKA/Primary Examiner, Art Unit 1759 August 27, 2026
Read full office action

Prosecution Timeline

Aug 14, 2023
Application Filed
Sep 01, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12749732
CONFIGURING BATTERY PACKS FOR COMPUTER SYSTEMS
3y 6m to grant Granted Sep 29, 2026
Patent 12749674
ELECTRODE AND ELECTRODE MANUFACTURING METHOD
3y 2m to grant Granted Sep 29, 2026
Patent 12749742
BATTERY SHELL ASSEMBLY AND LITHIUM-ION BATTERY
3y 2m to grant Granted Sep 29, 2026
Patent 12719046
Positive Electrode Including Positive Electrode Additive for Lithium Secondary Battery
2y 10m to grant Granted Aug 25, 2026
Patent 12719088
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2y 10m to grant Granted Aug 25, 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
76%
Grant Probability
87%
With Interview (+11.2%)
3y 0m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 709 resolved cases by this examiner. Grant probability derived from career allowance rate.

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