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:
Sep. 02, 2003
Filed:
Feb. 22, 1999
Applicant:
Inventors:
David P. Wilkinson, North Vancouver, CA;
Mark C. Johnson, Phoenix, AZ (US);
Kevin M. Colbow, North Vancouver, CA;
Stephen A. Campbell, Coquitlam, CA;
Assignee:
Ballard Power Systems Inc., Burnaby, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/00 ; H01M 8/04 ; H01M 8/12 ; H01M 4/86 ; H01M 4/90 ;
U.S. Cl.
CPC ...
H01M 8/00 ; H01M 8/04 ; H01M 8/12 ; H01M 4/86 ; H01M 4/90 ;
Abstract
In an electrochemical fuel cell, a sufficient quantity of catalyst, effective for promoting the reaction of reactant supplied to an electrode, is disposed within the volume of the electrode so that a reactant introduced at a first major surface of the electrode is substantially completely reacted upon contacting the second major surface. Crossover of reactant from one electrode to the other electrode through the electrolyte in an electrochemical fuel cell is thereby reduced.