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:
Jan. 02, 2007
Filed:
Nov. 24, 2003
Mark Mathias, Pittsford, NY (US);
Robert Darling, South Windsor, CT (US);
David L. Wood, Iii, Sante Fe, NM (US);
Mark Mathias, Pittsford, NY (US);
Robert Darling, South Windsor, CT (US);
David L. Wood, III, Sante Fe, NM (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A fuel cell system with a proton exchange membrane. There is a cathode catalyst layer overlying the first face of the proton exchange membrane, and a cathode diffusion layer overlying the cathode catalyst layer. There is an anode catalyst layer overlying the second face of the proton exchange membrane, and an anode diffusion layer overlying the anode catalyst layer. The cathode diffusion layer has a water vapor permeance of less than about 3×10g/(Pa s m) at 80° C. and 1 atmosphere. The invention also relates to cathode diffusion layers for fuel cell systems.