Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-04-10
2007-04-10
Ryan, Patrick Joseph (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000
Reexamination Certificate
active
10930364
ABSTRACT:
A silicone rubber gasket (35) is adhered to an anode substrate (14) by sealant material, such as a thermoplastic polymer, a thermoset polymer or en elastomeric polymer, which is impregnated (31) to provide an edge seal to the anode substrate. In one embodiment, a silicone rubber gasket (36) is adhered to the cathode substrate (26) by the sealant material which is impregnated (32) to provide a gas edge seal to the cathode substrate. Each fuel cell is completed during the formation of a fuel cell stack by compressing the fuel flow field plates and oxidant flow field plates to the unitized electrode assembly with gaskets. In a second embodiment, the oxidant flow field plate (27) is adhered to the cathode substrate by the sealant material which is impregnated into the cathode substrate to provide a gas edge seal, and the fuel flow field plate (18) is adhered to the oxidant flow field plate (27) by means of the sealant material (53). The entire fuel cell with gasket (9a) is formed in a single hot lamination step (45b).
REFERENCES:
patent: 6022634 (2000-02-01), Ramunni et al.
patent: 6159628 (2000-12-01), Grasso et al.
patent: 6387557 (2002-05-01), Krasij et al.
patent: 6440597 (2002-08-01), Mizuno
Mercado Julian
Ryan Patrick Joseph
UTC Power Corporation
Williams M. P.
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