Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2004-08-25
2009-10-06
Yuan, Dah-Wei D (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S006000
Reexamination Certificate
active
07597983
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.
REFERENCES:
patent: 3134697 (1964-05-01), Niedrach
patent: 5272017 (1993-12-01), Swathirajan et al.
patent: 5464700 (1995-11-01), Steck et al.
patent: 6020083 (2000-02-01), Breault et al.
patent: 6099984 (2000-08-01), Rock
patent: 6127058 (2000-10-01), Pratt et al.
patent: 6234225 (2001-05-01), Tanaka et al.
patent: 6350538 (2002-02-01), Wilkinson et al.
patent: 6641862 (2003-11-01), Grot
patent: 2003/0049518 (2003-03-01), Nanaumi et al.
patent: 2003/0118889 (2003-06-01), Smith
patent: 2004/0131908 (2004-07-01), Tanaka
patent: 2004/0151969 (2004-08-01), Ian Joos et al.
patent: WO/00/10216 (2000-02-01), None
International Search Report Issued by the ISA/US Dated Mar. 19, 2004.
International Search Report dated Jul. 6, 2006 for Appln. No. PCT/US05/20161 filed Jun. 9, 2005 corresponding to this application.
Lai Yeh-Hung
Milgate Robert
Rock Jeffrey A
Sompalli Bhaskar
GM Global Technology Operations Inc.
Han Kwang
Harness & Dickey & Pierce P.L.C.
Yuan Dah-Wei D
LandOfFree
Edge stress relief in diffusion media does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Edge stress relief in diffusion media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Edge stress relief in diffusion media will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4114891