Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-10-23
2007-10-23
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C521S027000
Reexamination Certificate
active
10697831
ABSTRACT:
Polymer electrolyte membranes such as are used in fuel cells are provided along with methods of their manufacture. The polymer electrolyte membranes comprise polymers or blends of polymers having an equivalent weight of less than 1200 and a Tg of between 101° C. and 155° C.
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Hamrock Steven J.
Pierpont Daniel M.
Rivard Linda M.
Yandrasits Michael A.
3M Innovative Properties Company
Dehl Philip Y.
Kalafut Stephen J.
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