Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-08-21
2007-08-21
Weiner, Laura (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S314000, C521S025000, C521S027000
Reexamination Certificate
active
10258865
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.
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Hirano Tetsuji
Kinouchi Masayuki
Maeda, legal representative Chizuyo
Maeda, legal representative Daisuke
Maeda, legal representative Megumi
UBE Industries Ltd.
Weiner Laura
Young & Thompson
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