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:
Mar. 06, 2012
Filed:
Jun. 11, 2007
Mitsuyasu Kawahara, Susono, JP;
Masayoshi Takami, Hamamatsu, JP;
Katsuhiko Iwasaki, Tsukuba, JP;
Shin Saito, Tsukuba, JP;
Mitsuyasu Kawahara, Susono, JP;
Masayoshi Takami, Hamamatsu, JP;
Katsuhiko Iwasaki, Tsukuba, JP;
Shin Saito, Tsukuba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
The present invention is to provide an electrolyte membrane which retains durability even after having undergone a dimensional change accompanying chemical deterioration caused owing to radicals having high oxidizing ability such as hydroxyl radicals (.OH) or peroxide radicals (.OOH), and the selecting method thereof. An electrolyte membrane has an amount of dimensional change in a plane direction between dimensions obtained in a dry state before and after carrying out the Fenton test, the amount of dimensional change before and after the Fenton test being smaller than an amount of maximum elastic deformation in a plane direction obtained in dry state before carrying out the Fenton test, provided that the Fenton test is carried out under the following condition, and the selecting method of the same. <Condition of Fenton test> (1) iron ion (Fe) concentration: 4 ppm, (2) hydrogen peroxide concentration: 3 wt %, (3) boiling temperature: 80° C., (4) boiling time: 120 minutes.