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:
Jul. 26, 2005
Filed:
Aug. 21, 2002
Ronald W. Call, Rock Hill, SC (US);
J. Robert Dees, Charlotte, NC (US);
Shizuo Ogura, Charlotte, NC (US);
Donald K. Simmons, Charlotte, NC (US);
Xiangyun Wei, Charlotte, NC (US);
Ronald W. Call, Rock Hill, SC (US);
J. Robert Dees, Charlotte, NC (US);
Shizuo Ogura, Charlotte, NC (US);
Donald K. Simmons, Charlotte, NC (US);
Xiangyun Wei, Charlotte, NC (US);
Celgard, Inc., Charlotte, NC (US);
Abstract
The present invention is directed to a battery separator. The battery separator comprises a microporous film having a first portion and a second portion. The first portion is bonded to the second portion. The bond has a strength greater than 5 g/in. The film has a thickness less than 1.7 mils, a Gurley of less than 50 sec/10 cc, and a puncture strength of greater than 400 g/mil.