Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2006-09-12
2006-09-12
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S047000, C429S047000
Reexamination Certificate
active
07105242
ABSTRACT:
Favorable performance of diffusion media in fuel cells has found to be correlated to a parameter (the C/F ratio) that relates to a spatial and thickness distribution of the hydrophobic fluoropolymer on the carbon fiber substrate structure of the medium. Suitable diffusion media may be chosen from among commercially coated diffusion media by measuring the C/F ratio by means of energy dispersive spectroscopy, and choosing the diffusion media if the value of the C/F ratio is within the preferred range. Alternatively, the diffusion media may be manufactured with an improved process that consistently yields values of C/F ratio in the desired range.
REFERENCES:
patent: 4017663 (1977-04-01), Breault
patent: 6350539 (2002-02-01), Wood, III et al.
patent: 6538058 (2003-03-01), Kobayashi et al.
patent: 6573004 (2003-06-01), Igarashi et al.
patent: 2004/0124091 (2004-07-01), Hohenthanner et al.
Mark Mathias et al., “Chapter 46, Diffusion media materials and characterisation”, John Wiley & Sons, Ltd., 2003, pp. 1-21, month not applicable.
Angelopoulos Anastasios P
Ji Chunxin
Mathias Mark F
General Motors Corporation
Kalafut Stephen J.
LandOfFree
Control of polymer surface distribution on 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 Control of polymer surface distribution on diffusion media..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of polymer surface distribution on diffusion media... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3579241