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:
Jul. 05, 2011
Filed:
Feb. 25, 2005
Minoru Umeda, Nagaoka, JP;
Akifumi Yamada, Nagaoka, JP;
Isamu Uchida, Sendai, JP;
Nagaoka University of Technology, Nagaoka-Shi, JP;
Abstract
A membrane-electrode assembly (MEA)has a solid polymer electrolyte membrane. The membranehas ion-conductive domainsand non-ion-conductive domainsand an electrode catalyst. The electrode catalystis present selectively on surface sites of the solid polymer electrolyte membranewhich corresponds to the ion-conductive domainsrather than surface sites of the membranewhich corresponds to the non-ion-conductive domains. A spray liquid containing the electrode catalyst and a solvent is applied onto a surface of the membraneby electrostatic spray deposition to selectively adhere the electrode catalyston the surface sites of the membranewhich corresponds to the ion-conductive domains. The membraneis preferably subjected to a hydrophilization treatment before being sprayed with the spray liquid.