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:
Aug. 21, 2007
Filed:
May. 07, 2002
Tetsuji Hirano, Yamaguchi, JP;
Masayuki Kinouchi, Yamaguchi, JP;
Chizuyo Maeda, Legal Representative, Yawata, JP;
Daisuke Maeda, Legal Representative, Yokohama, JP;
Megumi Maeda, Legal Representative, Yawata, JP;
Tetsuji Hirano, Yamaguchi, JP;
Masayuki Kinouchi, Yamaguchi, JP;
Chizuyo Maeda, legal representative, Yawata, JP;
Daisuke Maeda, legal representative, Yokohama, JP;
Megumi Maeda, legal representative, Yawata, JP;
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
A polyelectrolyte for a solid polymeric fuel cell comprising an aromatic polyether sulfone block copolymer comprising a hydrophilic segment containing sulfonic acid groups and a hydrophobic segment having no sulfonic acid group at a hydrophilic segment weight fraction W2 to hydrophobic segment weight fraction W1 ratio falling within a range of 0.6<W2/W1<2.0. The polyelectrolyte for a solid polymeric fuel cell is inexpensive and durable, and its proton conductivity is less influenced by humidity and temperature.