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:
Sep. 01, 2020
Filed:
Mar. 12, 2015
Applicant:
Tokyo Ohka Kogyo Co., Ltd., Kanagawa, JP;
Inventor:
Tsukasa Sugawara, Kanagawa, JP;
Assignee:
TOKYO OHKA KOGYO CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 2/14 (2006.01); H01M 10/0525 (2010.01); H01M 10/052 (2010.01); H01M 4/13 (2010.01);
U.S. Cl.
CPC ...
H01M 2/1686 (2013.01); H01M 2/145 (2013.01); H01M 2/1653 (2013.01); H01M 10/0525 (2013.01); H01M 4/13 (2013.01); H01M 10/052 (2013.01);
Abstract
A porous separator for secondary batteries is formed of a porous film, and has a first layered region having an average pore diameter of 100 nm or more and 500 nm or less, and a second layered region having a larger average pore diameter than the first layered region. The first layered region is positioned in one outermost surface of the porous film. Both the first layered region and the second layered region may be positioned as outermost surfaces of the porous film.