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. 16, 1999
Filed:
Dec. 23, 1997
Katsuhiko Iwasaki, Ehime, JP;
Taketsugu Yamamoto, Ibaraki, JP;
Hiroshi Harada, Ehime, JP;
Atsushi Terahara, Ibaraki, JP;
Kunihisa Satoh, Ehime, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
Provided is a polymer electrolyte which is cheap and easily synthesized, and has a high water resistance and high output performance. The polymer electrolyte comprising a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR1##