The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 2026
Filed:
Jan. 25, 2021
Dupont Safety & Construction, Inc., Wilmington, DE (US);
Nippon K Nippon Kodoshi Ltd. (Nkk), Kochi-City, JP;
Yuhei Nishimori, Kochi-City, JP;
Gaku Matsuoka, Kochi-City, JP;
Takumi Ichimura, Kochi-City, JP;
Norihiro Wada, Kochi-City, JP;
DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US);
NIPPON KOSOSHI CORPORATION, Kochi-City, JP;
Abstract
This separator is for electrochemical elements, is to be interposed between a pair of electrodes, and includes para-aramid fibers for holding an electrolytic solution. The separator for electrochemical elements is characterized in that the contained amount of fibers having a fiber diameter of 0.03-0.50 μm is 90 mass % or more, the proportion of the number of fibers having a fiber length not less than 0.05 mm but less than 0.20 mm is 20-30%, and the proportion of the number of fibers having a fiber length not less than 0.20 mm but less than 5.00 mm is 70-80%.