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:
Dec. 25, 1984
Filed:
Oct. 21, 1981
Thomas C Bissot, Newark, DE (US);
William E Grigsby, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A membrane assembly which comprises a layer of perfluorinated polymer which has carboxylate functional groups, a layer of perfluorinated polymer which has ion exchange functional groups, and a water-containing or water-soluble stratum which lies between these two layers and joins them together, is described. Such a multilayered composite membrane is more simply made than conventional multilayered membranes having adherent layers, and provides for easy recovery of the component parts thereof. The membrane assembly is useful for separating the compartments of an electrochemical cell, especially a chloralkali cell.