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:
Oct. 06, 2009
Filed:
Aug. 25, 2004
Yeh-hung Lai, Webster, NY (US);
Jeffrey a Rock, Fairport, NY (US);
Bhaskar Sompalli, Rochester, NY (US);
Robert Milgate, Gloucester, MA (US);
Yeh-Hung Lai, Webster, NY (US);
Jeffrey A Rock, Fairport, NY (US);
Bhaskar Sompalli, Rochester, NY (US);
Robert Milgate, Gloucester, MA (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A diffusion media for use in a PEM fuel cell which includes a relieved edge region relative to the interior region of the diffusion media. The outer perimeter or portion of the diffusion media that will interface with a sealing gasket is pre-compressed. The pre-compressed diffusion media lowers the compression stress on the MEA at the gasket interfaces, enabling a more uniform compression on the entirety of the MEA surfaces during the build, compression, and later operation of a fuel cell stack.