The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2007
Filed:
Oct. 01, 2004
Timothy J Fuller, Pittsford, NY (US);
Beba Dobulis, Rochester, NY (US);
Timothy J Fuller, Pittsford, NY (US);
Beba Dobulis, Rochester, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Polyelectrolyte membranes suitable for use in a fuel cell are provided as a solid state sulfonation product of particular fluorinated polymers, or alternatively as a fluorination product of particular sulfonated polymers. A sulfonated polymer is provided that contains repeating units represented by structure, wherein the groups Ar3 and Ar4 are independently selected from the group consisting of aryl rings, aryl ring systems, and thiophene rings, and where at least one of Ar3 and Ar4 is substituted with a sulfonate group. Films suitable for use as a polyelectrolyte membrane are prepared from the sulfonated polymers.