Prosecution Insights
Last updated: August 17, 2026
Application No. 17/634,566

ENERGY STORAGE SYSTEM

Final Rejection §103
Filed
Feb 11, 2022
Priority
Aug 14, 2019 — DE 10 2019 121 850.0 +1 more
Examiner
YOON, KEVIN E
Art Unit
1735
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Carl Freudenberg KG
OA Round
6 (Final)
60%
Grant Probability
Moderate
7-8
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allowance Rate
402 granted / 676 resolved
-5.5% vs TC avg
Strong +43% interview lift
Without
With
+43.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
36 currently pending
Career history
712
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
54.0%
+14.0% vs TC avg
§102
22.4%
-17.6% vs TC avg
§112
18.9%
-21.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 676 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 . 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. 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) 1-5, 7-10, 12, 14-16, and 23 is/are rejected under 35 U.S.C. 103 as being unpatentable over Maier et al. (DE 102012222689 A1, hereinafter Maier, cited by applicant) in view of Leuthner et al. (WO 2010/023064 A1, hereinafter Leuthner, previously cited), Okajima et al. (US 6,309,776 B1, hereinafter Okajima, previously cited), and Lee et al. (WO 2018/097697 A1, hereinafter Lee, See US 2019/0386360 A1 for English translation). Re Claim 1. Maier teaches an energy storage system, the energy storage system comprising at least two storage cells (Fig. 1 & 2, items 12 & 14 with item 18), wherein the at least two storage cells are each provided, at least in sections, with a casing (item 20 and plastic sheets or plastic film and electrically insulating shrink tubing, Page 8), wherein each casing comprises plastic (Page 7 & 8), wherein each casing is formed from elastomeric material (Page 7 & 8) with an endothermically-actin filler (Page 7, aluminum hydroxide) being introduced into the elastomeric material, and wherein each casing has a circular cross-section (Page 5) that is contoured on an outside (Fig. 2). Maier fails to specifically teach that each casing has longitudinal ribs that project in a radially outward direction relative to a center of the circular cross-section of a respective casing, the longitudinal rebs each extending in the radially outward direction from a radially outer periphery of the circular cross-section, wherein the longitudinal ribs are arranged evenly distributed about a circumference of each casing, and wherein at least one of the longitudinal ribs of a first of the at least two storage cells is arranged between at least two of the longitudinal ribs of a second of the at least two storage cells, and the endothermically-acting filler being configured to release gas at temperatures above 100 °C. The invention of Leuthner encompasses battery module. Leuthner teaches that each casing has longitudinal ribs (Fig. 5, item 7) that project in a radially outward direction relative to a center of the circular cross-section of a respective casing, the longitudinal rebs each extending in the radially outward direction from a radially outer periphery of the circular cross-section (Fig. 5), wherein the longitudinal ribs are arranged evenly distributed about a circumference of each casing (Fig. 5). In view of Leuthner, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier to employ longitudinal ribs of Leuthner and configuration, since Leuthner teaches the advantage of using them, which is to achieve high cooling performance (abstract). The invention of Okajima encompasses assembled storage battery unit. Okajima teaches that each casing has longitudinal ribs (Fig. 2 & 3, items 16a-16h & 26a-26h), and wherein at least one of the longitudinal ribs of a first of the at least two storage cells (Fig. 2 & 3, items 16f) is arranged between at least two of the longitudinal ribs of a second of the at least two storage cells (items 26a & 26b). In view of Okajima, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier in view of Leuthner to have at least one of the longitudinal ribs of a first of the at least two storage cells arranged between at least two of the longitudinal ribs of a second of the at least two storage cells, since Okajima teaches the advantage of doing it, which is to from a plurality of ventilation spaces (abstract). The invention of Lee encompasses heat dissipating elastic body composition. Lee teaches to add calcium carbonate as an additive to an elastic body (para. 82). In view of Lee, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier in view of Leuthner and Okajima to employ calcium carbonate in the casing formed from elastomeric material, since Lee teaches the advantage of using it, which is to improve the mechanical strength of the body (para. 82). The specification of the instant application discloses that calcium carbonate releases gas above 100 °C (para. 41). Re Claim 2. The combination teaches wherein the casing is configured to be elastic (Maier, Page 8). Re Claim 3. The combination teaches wherein the at least one storage cell is a round cell (Maier, Page 5). Re Claim 4. The combination teaches wherein the casing surrounds a sheath of the at least one storage cell at least in sections (Maier, Fig. 1). Re Claim 5. The combination teaches wherein the casing is configured to be electrically insulating (Maier, Page 8). Re Claim 7. The combination teaches wherein the casing is configured to be tubular (Maier, Page 5 & 8). Re Claim 8. The combination teaches wherein the casing is formed from sheeting (Maier, Page 8). Re Claim 9. The combination teaches wherein the casing abuts with pretension on a sheath of the at least one storage cell (Maier, Page 8). Re Claim 10. The combination teaches wherein the material for increasing the thermal conductivity is an electrically-insulating, inorganic filler (Maier, Page 7). Re Claim 12. The combination teaches wherein each casing is contoured on a side facing a respective storage cell of the at least two storage cells (Maier, P5 & Leuthner, Fig. 5). Re Claim 14. The combination teaches a cooler (Maier, Fig. 1 & 2, item 22), wherein the casing is configured to transmit heat emitted by the at least one storage cell to the cooler (Page 8). Re Claim 15. The combination teaches wherein the casing lies flat against the cooler (Maier, Fig. 2). Re Claim 16. Maier teaches an energy storage system comprising: at least one storage cell (Fig. 1, items 12 & 14 with item 18); and a casing (item 20) and, plastic sheets or plastic film and electrically insulating shrink tubing, P8), disposed on at least one storage cell at least in sections and comprising plastic (P8) and a further material with a greater thermal conductivity than the plastic (P7), wherein each casing has a circular cross-section (P5) that is contoured on an outside (Fig. 2). Maier fails to specifically teach that each casing has longitudinal ribs that project in a radially outward direction relative to a center of the circular cross-section of a respective casing, the longitudinal rebs each extending in the radially outward direction from a radially outer periphery of the circular cross-section, wherein the longitudinal ribs are arranged evenly distributed about a circumference of each casing, and wherein at least one of the longitudinal ribs of a first of the at least two storage cells is arranged between at least two of the longitudinal ribs of a second of the at least two storage cells, and the endothermically-acting filler being configured to release gas at temperatures above 100 °C. The invention of Leuthner encompasses battery module. Leuthner teaches that each casing has longitudinal ribs (Fig. 5, item 7) that project in a radially outward direction relative to a center of the circular cross-section of a respective casing, the longitudinal rebs each extending in the radially outward direction from a radially outer periphery of the circular cross-section (Fig. 5), wherein the longitudinal ribs are arranged evenly distributed about a circumference of each casing (Fig. 5). In view of Leuthner, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier to employ longitudinal ribs of Leuthner and configuration, since Leuthner teaches the advantage of using them, which is to achieve high cooling performance (abstract). The invention of Okajima encompasses assembled storage battery unit. Okajima teaches that each casing has longitudinal ribs (Fig. 2 & 3, items 16a-16h & 26a-26h), and wherein at least one of the longitudinal ribs of a first of the at least two storage cells (Fig. 2 & 3, items 16f) is arranged between at least two of the longitudinal ribs of a second of the at least two storage cells (items 26a & 26b). In view of Okajima, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier in view of Leuthner to employ longitudinal ribs that project radially outward, and have at least one of the longitudinal ribs of a first of the at least two storage cells arranged between at least two of the longitudinal ribs of a second of the at least two storage cells, since Okajima teaches the advantage of doing it, which is to from a plurality of ventilation spaces (abstract). The invention of Lee encompasses heat dissipating elastic body composition. Lee teaches to add calcium carbonate as an additive to an elastic body (para. 82). In view of Lee, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier in view of Leuthner and Okajima to employ calcium carbonate in the casing formed from elastomeric material, since Lee teaches the advantage of using it, which is to improve the mechanical strength of the body (para. 82). Re Claim 23. The combination teaches wherein the endothermically-acting filler is configured to undergo an endothermic reaction at temperatures above 100°C (Maier, inherent property of aluminum hydroxide), but does not explicitly teach that the endothermic reaction is triggered by recrystallization or release of crystal water. However, since Maier in view of Leuthner, Okajima, and Lee and the claimed system employ substantially similar materials, it is reasonable to believe that the claimed properties (the endothermic reaction is triggered by recrystallization or release of crystal water) would have naturally flowed following the teachings of Maier in view of Leuthner, Okajima, and Lee. See MPEP 2112.01 & In re Best, 562 F.2d 1252, 1255, 195 USPQ 430, 433 (CCPA 1977). MPEP 2145 & Ex parte Obiaya, 227 USPQ 58, 60 (Bd. Pat. App. & Inter. 1985). Claim(s) 17 and 18 is/are rejected under 35 U.S.C. 103 as being unpatentable over Maier in view of Leuthner, Okajima, and Lee as applied to claim 12 above, and further in view of Bannai (WO 2020/031467 A1, previously cited). The teachings of Maier in view of Leuthner, Okajima, and Lee have been discussed above. Re Claim 17. Maier in view of Leuthner, Okajima, and Lee fails to specifically teach that each casing is contoured with longitudinal ribs on a side facing a respective storage cell of the at least two cells. The invention of Bannai encompasses battery holder and battery pack. Bannai teaches that casing is contoured with longitudinal ribs on a side facing a respective storage cell of the at least two cells (Fig. 3 & 4). In view of Bannai, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier in view of Leuthner, Okajima, and Lee to have each casing contoured with longitudinal ribs on a side facing a respective storage cell of the at least two cells, since Bannai teaches the advantage of using them, which is to cool the battery effectively (Page 5). Re Claim 18. The combination teaches wherein the longitudinal ribs form channels (Bannai, Fig. 3 & 4) through which a cooling medium is configured to flow and through which gas released by the endothermically-acting filler is configured to flow. Regarding “through which a cooling medium is configured to flow and through which gas released by the endothermically-acting filler is configured to flow”: since the system of Maier in view of Leuthner, Okajima, Lee, and Bannai and the claimed system are structurally indistinguishable, the channel of Maier in view of Leuthner, Okajima, Lee, and Bannai is capable of performing the clamed function. Claim(s) 24 and 26 is/are rejected under 35 U.S.C. 103 as being unpatentable over Maier in view of Lee. Re Claim 24. Maier teaches an energy storage system, the energy storage system comprising at least two storage cells (Fig. 1 & 2, items 12 & 14 with item 18), wherein the at least two storage cells are each provided, at least in sections, with a casing (item 20 and plastic sheets or plastic film and electrically insulating shrink tubing, Page 8), wherein each casing comprises plastic (Page 7 & 8), wherein each casing is formed from elastomeric material (Page 7 & 8) with an endothermically-acting filler (Page 7, aluminum hydroxide) being introduced into the elastomeric material. Maier fails to specifically teach the endothermically-acting filler being configured to release gas at temperatures above 100°C. The invention of Lee encompasses heat dissipating elastic body composition. Lee teaches to add calcium carbonate as an additive to an elastic body (para. 82). In view of Lee, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Maier to employ calcium carbonate in the casing formed from elastomeric material, since Lee teaches the advantage of using it, which is to improve the mechanical strength of the body (para. 82). Re Claim 26. The combination teaches wherein the gas configured to be released by the endothermically-acting filler at temperatures above 100°C is carbon dioxide (inherent property of calcium carbonate). Claim(s) 24, 26, and 27 is/are rejected under 35 U.S.C. 103 as being unpatentable over Bannai in view of Lee. Re Claim 24. Bannai teaches an energy storage system (Fig. 1 & 2), the energy storage system comprising at least two storage cells (item 5), wherein the at least two storage cells are each provided, at least in sections, with a casing (items 2a & 2b), wherein each casing comprises plastic (Page 4), wherein each casing is formed from elastomeric material (Page 4, aluminum hydroxide) with an endothermically-acting filler (Page 4) being introduced into the elastomeric material. Bannai fails to specifically teach the endothermically-acting filler being configured to release gas at temperatures above 100°C. The invention of Lee encompasses heat dissipating elastic body composition. Lee teaches to add calcium carbonate as an additive to an elastic body (para. 82). In view of Lee, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Bannai to employ calcium carbonate in the casing formed from elastomeric material, since Lee teaches the advantage of using it, which is to improve the mechanical strength of the body (para. 82). Re Claim 26. The combination teaches wherein the gas configured to be released by the endothermically-acting filler at temperatures above 100°C is carbon dioxide (inherent property of calcium carbonate). Re Claim 27. The combination teaches wherein the elastomeric material is a silicone-based elastomer or a ethylene propylene diene monomer (Bannai, Page 4). Response to Arguments Applicant’s arguments with respect to claim(s) 1 and 24 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Newly cited reference, Lee addresses the new limitation. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. The rejections above rely on the references for all the teachings expressed in the text of the references and/or one of ordinary skill in the art would have reasonably understood from the texts. Only specific portions of the texts have been pointed out to emphasize certain aspects of the prior art, however, each reference as a whole should be reviewed in responding to the rejection, since other sections of the same reference and/or various combinations of the cited references may be relied on in future rejections in view of amendments. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KEVIN E YOON whose telephone number is (571)270-5932. The examiner can normally be reached Monday-Friday 9 AM- 5 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, Keith Walker can be reached at 571-272-3458. 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. /KEVIN E YOON/Primary Examiner, Art Unit 1735 6/10/2026
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Prosecution Timeline

Show 11 earlier events
Jan 05, 2026
Request for Continued Examination
Jan 07, 2026
Response after Non-Final Action
Feb 11, 2026
Non-Final Rejection mailed — §103
Apr 15, 2026
Interview Requested
Apr 21, 2026
Examiner Interview Summary
Apr 21, 2026
Applicant Interview (Telephonic)
Jun 08, 2026
Response Filed
Jun 16, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

7-8
Expected OA Rounds
60%
Grant Probability
99%
With Interview (+43.1%)
2y 7m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 676 resolved cases by this examiner. Grant probability derived from career allowance rate.

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