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. 12, 2019
Filed:
Jun. 23, 2017
Applicant:
Mitsubishi Paper Mills Limited, Tokyo, JP;
Inventors:
Tomohiro Sato, Tokyo, JP;
Toshihiro Shigematsu, Tokyo, JP;
Makoto Kato, Tokyo, JP;
Kenji Hyodo, Tokyo, JP;
Wakana Aizawa, Tokyo, JP;
Assignee:
MITSUBISHI PAPER MILLS LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); H01M 10/0525 (2010.01); D04H 1/55 (2012.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 2/162 (2013.01); D04H 1/55 (2013.01); H01M 2/145 (2013.01); H01M 10/0525 (2013.01); H01M 10/052 (2013.01);
Abstract
A non-woven fabric base material for a lithium ion secondary battery separator composed mainly of a polyethylene terephthalate fiber, characterized in that the non-woven fabric base material comprises a polyethylene terephthalate binder fiber and a crystallized polyethylene terephthalate fiber, and the content of a polyethylene terephthalate binder fiber having a fiber length of 2.5 mm or less is 10 to 60 mass %.