Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Making catalytic electrode – process only
Reexamination Certificate
2004-12-03
2008-08-19
Mulcahy, Peter D. (Department: 1796)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Making catalytic electrode, process only
C427S115000, C429S006000, C429S047000, C429S047000, C429S047000
Reexamination Certificate
active
07414004
ABSTRACT:
The present invention provides a gas diffusion layer for a fuel cell which has proper rigidity, is easy to handle and contributes to the improvement of the productivity of fuel cells. A method for producing a gas diffusion layer for a fuel cell including a first step of: impregnating a conductive porous substrate made of a conductive carbon fiber cloth or conductive carbon fiber felt with a first dispersion containing a first fluorocarbon resin having thermoplasticity; and baking the first conductive porous substrate at a first baking temperature of not less than the melting point of the first fluorocarbon resin and less than the decomposition temperature of the first fluorocarbon resin to enhance the rigidity of the conductive porous substrate.
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Office Action dated May 25, 2006.
“Dictionary of Chemical Technology,” Wang Zhen, Chief Editor, Chemical Industry Press, Apr. 2001.
Gyoten Hisaaki
Hori Yoshihiro
Kanbara Teruhisa
Tsuji Yoichiro
Uchida Makoto
Hu Henry
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
Mulcahy Peter D.
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