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, 2, and 4 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sotowa (WO 2020/116324 A1, cited by applicant).
Re Claim 1. Sotowa teaches a negative electrode (abstract) for an energy storage device (intended use) comprising a negative active material layer (abstract) containing solid graphite (P3), wherein the solid graphite has an average circularity of 0.5 to 0.94 (P3), and the negative active material layer further contains carbon fine particles (P6).
In the case where the claimed ranges “overlap or lie inside ranges disclosed by the prior art” a prima facie case of obviousness exists. In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990). "[A] prior art reference that discloses a range encompassing a somewhat narrower claimed range is sufficient to establish a prima facie case of obviousness." In re Peterson, 315 F.3d 1325, 1330, 65 USPQ2d 1379, 1382-83 (Fed. Cir. 2003). See MPEP § 2144.05, I.
Re Claim 2. Sotowa teaches wherein the solid graphite has an average particle size of 0.1 to 10 µm (P3).
Re Claim 4. Sotowa teaches an energy storage device (abstract) comprising the negative electrode according to claim 1 (see rejection of Claim 1).
Claim(s) 3 and 5 is/are rejected under 35 U.S.C. 103 as being unpatentable over Sotowa as applied to claim 1 above, and further in view of Kimura et al. (WO 2019/098200 A1, hereinafter Kimura).
The teachings of Sotowa have been discussed above.
Re Claim 3. Sotowa fails to specifically teach that a ratio of an average pore size of the negative active material layer to the average particle size of the solid graphite is less than 0.14.
The invention of Kimura encompasses non-aqueous lithium-type electricity storage element. Kimura teaches that an average pore size of the negative active material layer is 20 to 50 nm (0.02 to 0.05 µm, P27).
In view of Kimura, it would have been obvious to one of ordinary skill in the art at the time of invention to modify the invention of Sotowa to have an average pore size of the negative active material layer to be 20 to 50 nm (0.02 to 0.05 µm), since Kimura teaches the advantage of doing it, which is to achieve excellent low temperature resistance (P27).
The average pore size of the negative active material layer is 0.02 to 0.05 µm, while the average particle size of the solid graphite is 0.1 to 10 µm. Therefore, a ratio of an average pore size of the negative active material layer to the average particle size of the solid graphite is 0.002 to 0.5.
Re Claim 5. The combination teaches an energy storage device (Sotowa, abstract) comprising the negative electrode according to claim 3 (see rejection of Claim 3).
Conclusion
The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. See PTO-892.
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.
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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.
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/KEVIN E YOON/Primary Examiner, Art Unit 1735
6/10/2026
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