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. 17, 2009
Filed:
Apr. 02, 2004
Applicants:
Masahiro Ohashi, Moriyama, JP;
Takahiko Kondo, Yokohama, JP;
Inventors:
Masahiro Ohashi, Moriyama, JP;
Takahiko Kondo, Yokohama, JP;
Assignee:
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 4/58 (2006.01);
U.S. Cl.
CPC ...
Abstract
A microporous polyolefin film that comprises polyethylene and polypropylene as essential components and is composed of a laminate film of two or more layers, wherein the percentage of polypropylene blended in at least one surface layer of the film is more than 50% by weight and 95% by weight or less and the content of polyethylene in the entire film is 50% or more and 95% or less.