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:
Nov. 10, 2015
Filed:
Aug. 25, 2010
Applicants:
Daisuke Inagaki, Tokyo, JP;
Hisashi Takeda, Tokyo, JP;
Shintaro Inaba, Tokyo, JP;
Inventors:
Assignee:
ASAHI KASEI E-MATERIALS CORPORATION, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01G 11/52 (2013.01); H01M 2/18 (2006.01); H01M 2/14 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 2/1653 (2013.01); H01G 11/52 (2013.01); H01M 2/18 (2013.01); H01M 2/145 (2013.01); H01M 2/166 (2013.01); H01M 2/1686 (2013.01); H01M 10/0525 (2013.01); Y02E 60/13 (2013.01);
Abstract
A microporous membrane winding includes a microporous membrane wound around a core. The core has an outer diameter of 5 inches or greater, and has an outer surface with a surface roughness of 3.0 μm or less. A microporous membrane that is excellent in thickness uniformity and is favorably used as a separator for a lithium-ion secondary battery can be obtained from the microporous membrane winding.