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:
Jan. 04, 1983
Filed:
Sep. 09, 1980
Karl Hohne, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The invention relates to a method for the manufacture of diaphragms for electrochemical cells by impregnating asbestos paper with an organic plastic, and has as its principal object the development of such a method in a manner such that asbestos diaphragms which have high mechanical strength and are also cost-effective can be manufactured in efficient production. According to the invention, it is provided for this purpose to treat asbestos paper made by extrusion with a solution of polyvinylchloride or polysulfone in an organic solvent. The diaphragms prepared by the method acocrding to the invention are particularly suitable as cover layers in fuel cells with an alkaline electrolyte.