Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Reexamination Certificate
2003-03-04
2010-12-07
Pezzuto, Helen L. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C521S027000
Reexamination Certificate
active
07846982
ABSTRACT:
The present invention relates to a proton-conducting electrolyte membrane obtainable by a process comprising the steps:A) swelling a polymer film with a liquid comprising a vinyl-containing sulphonic acid andB) polymerising the vinyl-containing sulphonic acid present in liquid introduced in step A).A membrane according to the invention is very versatile on account of its excellent chemical and thermal properties and may be used, in particular, as a polymer electrolyte membrane (PEM) in what are known as PEM fuel cells.
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Calundann Gordon
Crivello James
Kiefer Joachim
Uensal Oemer
Connolly Bove & Lodge & Hutz LLP
Pemeas GmbH
Pezzuto Helen L.
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