Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2003-07-02
2008-11-04
Neckel, Alexa D. (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C528S423000
Reexamination Certificate
active
07445864
ABSTRACT:
The present invention relates to functionalized polyazoles comprising recurring imidazole units of the general formulawhere the radicals Ar, Ar1and Ar2are tetravalent, divalent or trivalent aromatic or heteroaromatic groups,Y is a bond or a group having from 1 to 20 carbon atoms,v is an integer from 1 to 10 andZ is a group of the general formulawhere R1and R2are each, independently of one another, a hydrogen atom or a group having from 1 to 20 carbon atoms, characterized in that the polyazole is soluble in organic solvents. Furthermore, the present invention relates to intermediates and to a process for preparing the polyazoles. Furthermore, the present invention describes polymer electrolyte membranes and fuel cells in which the polyazoles of the invention are present.
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Baurmeister Jochen
Klapper Markus
Muellen Klaus
Sinigersky Vesselin
Uensal Oemer
BASF Fuel Cell GmbH
Hamilton Brook Smith & Reynolds P.C.
Neckel Alexa D.
Rademaker Claire L
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