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:
Feb. 08, 1977
Filed:
Dec. 11, 1974
Alfred Dwayne Nelson, Stillwater, MN (US);
Larry E Espelien, St. Paul, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
This invention pertains to a fuel cell which comprises a case, positive and negative electrodes inserted therein and electrolyte filling the inner space between the electrodes. Means for introducing an oxidizing gas into the space behind one electrode and a fuel behind the other are provided. A porous membrane substantially parallel to the electrodes comprising a self-supporting compressible porous fibrous mat of randomly dispersed and entangled micro-fibers of a high molecular weight thermoplastic polymer impregnated with said electrolyte occupies said inner space. This porous membrane permits communication of electrolyte between electrodes but prevents passage of small bubbles of oxidizing or fuel gases.