Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2005-03-08
2005-03-08
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C264S331110, C252S511000
Reexamination Certificate
active
06864008
ABSTRACT:
To provide a separator for a fuel cell made of graphite excellent in mechanical strength and gas impermeability as well as electric characteristic properties, a separator for a fuel cell is produced from a molded body produced by filling a graphite powder21whose surface is coated with resin20in a molding die and by pressure-molding the powder. Such a molded body is provided with excellent mechanical strength of 40 MPa of bending strength or higher, 10×10−8cc·cm/cm2·sec·atm of gas permeability or lower, and electric property of 10×10−3Ω·cm of the volume resistance or lower even if the content of resin is decreased to as low as 10 to 24 wt. %.
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Kato Shoji
Otawa Kazuhiko
Sugita Katsunori
Kalafut Stephen J.
Meyertons Eric B.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Nippon Pilllar Packing Co., Ltd.
Toyota Jidosha & Kabushiki Kaisha
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