Liquid purification or separation – Filter – Material
Reexamination Certificate
2003-10-02
2010-02-16
Fortuna, Ana M (Department: 1797)
Liquid purification or separation
Filter
Material
C210S500270, C210S490000, C204S296000, C429S006000
Reexamination Certificate
active
07661542
ABSTRACT:
The present invention relates to a proton-conducting polymer membrane which comprises polyazoles and is coated with a catalyst layer and is obtainable by a process comprising the stepsA) preparation of a mixture comprisingpolyphosphoric acid,at least one polyazole (polymer A) and/or one or more compounds which are suitable for forming polyazoles under the action of heat according to step B),B) heating of the mixture obtainable according to step A) under inert gas to temperatures of up to 400° C.,C) application of a layer using the mixture obtained according to step A) and/or B) to a support,D) treatment of the membrane formed in step C) until it is self-supporting,E) application of at least one catalyst-containing coating to the membrane formed in step C) and/or in step D).
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Baurmeister Jochen
Benicewicz Brian
Calundann Gordon
Kiefer Joachim
Kundler Isabel
BASF Fuel Cell GmbH
Connolly Bove & Lodge & Hutz LLP
Fortuna Ana M
LandOfFree
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