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:
Jul. 24, 1984
Filed:
Jul. 06, 1982
Surendar M Jain, Watertown, MA (US);
Ionics Incorporated, Watertown, MA (US);
Abstract
A polarity reversing electrodialysis membrane stack containing a composite electrode at each end of the stack with each electrode having anode and cathode portions electrically insulated from each other. Current is supplied to the anode portion of one electrode and to the cathode portion of the other electrode with means for maintaining a trickle of current from the active anode of one electrode to the inactive anode of the other electrode. Upon reversal of stack polarity the electrodes change their polarities and the trickle currents runs to the other electrode. The invention also is directed to the use of noble metal coated electrodes wherein the coating covers substantially less than the total electrode surface which is in contact with electrolytic solution during use.