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. 23, 2014
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:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); B32B 9/04 (2006.01); H01M 2/14 (2006.01); B32B 27/32 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 2/16 (2013.01); H01M 2/145 (2013.01); B32B 27/32 (2013.01); Y02T 10/7011 (2013.01); H01M 10/0525 (2013.01); Y02E 60/12 (2013.01); H01M 2/1686 (2013.01);
Abstract
The invention relates to microporous membranes having high meltdown temperature, low shutdown temperature, and resistance to heat shrinkage at elevated temperature. The membranes can be produced by stretching a sheet comprising polymethylpentene, polyethylene, and diluent, and then removing the diluent. The membranes can be used as battery separator film in, e.g., lithium ion batteries.