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. 03, 1998
Filed:
Oct. 03, 1996
Applicant:
Inventors:
Ora Kedem, Rehovot, IL;
Ludmilla Schechtmann, Rehovot, IL;
Assignee:
Yeda Research and Development Company Ltd., Rehovot, IL;
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; B01J / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
521 27 ; 210490 ; 21050027 ; 21050041 ; 210638 ; 210641 ;
Abstract
The invention concerns heterogeneous ion exchange membranes used in electrodialysis which have anti-polarization and anti-fouling properties. The heterogeneous membranes of the invention comprise, in addition to ion-exchange particles embedded in the matrix, a layer of at least one hydrophilic cross-linked polymer bearing fixed electric charges. Alternatively, the heterogeneous membranes of the invention have a matrix which is itself made of at least one hydrophilic cross-linked polymer.