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:
Oct. 31, 2006
Filed:
May. 02, 2003
David Edward Barnwell, Wiltshire, GB;
Silvain Buche, Reading, GB;
Lorenz Gubler, Nussbaumen, CH;
Thomas Robertson Ralph, Reading, GB;
David Edward Barnwell, Wiltshire, GB;
Silvain Buche, Reading, GB;
Lorenz Gubler, Nussbaumen, CH;
Thomas Robertson Ralph, Reading, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
The present invention relates to a composite membrane comprising at least one ion-conducting polymer and a network of randomly orientated individual fibers, wherein there is a continuous region of the membrane at one or both of the membrane faces wherein the density of fibers is lower than the density of fibers in the membrane as a whole. The invention further relates to processes for manufacturing membranes according to the invention, and membrane electrode assemblies comprising membranes according to the invention.