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:
Jun. 02, 2015
Filed:
Mar. 18, 2008
Applicant:
Mitsuo Tojo, Anpachi-gun, JP;
Inventor:
Mitsuo Tojo, Anpachi-gun, JP;
Assignee:
Teijin Dupont Films Japan Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/08 (2006.01); C08J 5/18 (2006.01); H01M 8/02 (2006.01); H01M 8/10 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); H01M 8/0273 (2013.01); C08J 2367/02 (2013.01); H01M 8/0291 (2013.01); H01M 8/1039 (2013.01); H01M 8/1053 (2013.01); H01M 8/106 (2013.01); H01M 8/1062 (2013.01); H01M 2250/20 (2013.01); H01M 2300/0094 (2013.01); Y02E 60/521 (2013.01); Y02T 90/32 (2013.01);
Abstract
A biaxially oriented film for reinforcing the electrolyte membrane of a polymer electrolyte fuel cell, wherein the film includes (i) a layer mainly composed of polyethylene naphthalene dicarboxylate and has (ii) a Young's modulus in at least one direction of not less than 9,000 MPa and (iii) a thickness of 15 to 150 μm. The biaxially oriented film has a satisfactory reinforcing effect as a reinforcing member for a polymer electrolyte membrane at the operation temperature of a polymer electrolyte fuel cell though it is a thin film.