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:
Dec. 01, 2015
Filed:
Jun. 08, 2010
Applicants:
Takeshi Ishihara, Nasushiobara, JP;
Satoshi Miyaoka, Nasushiobara, JP;
Inventors:
Takeshi Ishihara, Nasushiobara, JP;
Satoshi Miyaoka, Nasushiobara, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 10/0525 (2010.01); B32B 27/32 (2006.01); H01M 2/14 (2006.01);
U.S. Cl.
CPC ...
H01M 2/16 (2013.01); B32B 27/32 (2013.01); H01M 2/145 (2013.01); H01M 2/1686 (2013.01); H01M 10/0525 (2013.01); Y02E 60/12 (2013.01); Y02T 10/7011 (2013.01); Y10T 428/249978 (2015.04);
Abstract
The invention relates to microporous membranes having at least two layers, a first layer comprising polymethylpentene and a second layer which comprises a polymer and has a composition that is not substantially the same as that of the first layer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film in, e.g., lithium ion batteries.