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:
Mar. 16, 2010
Filed:
Dec. 29, 2004
Richard D. Breault, North Kingstown, RI (US);
Robert R. Fredley, Tolland, CT (US);
Richard D. Breault, North Kingstown, RI (US);
Robert R. Fredley, Tolland, CT (US);
UTC Power Corporation, South Windsor, CT (US);
Abstract
A fuel cell assembly () has a plurality of characteristics that extend the useful life of the assembly. In one example, flow field layers are non-porous and hydrophobic such that they have an acid absorption rate of less than about 0.10 mg/khr-cm. An electrolyte retaining matrix has a reaction rate with phosphoric acid of less than about 0.010 mg/khr-cm. Hydrophilic substrates associated with catalyst layers have an initial transferable phosphoric acid content of less than about 25 mg/cm. A condensation zone provides an evaporative phosphoric acid loss rate that is less than about 0.17 mg/khr-cm.