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:
Nov. 10, 1992
Filed:
Jan. 28, 1991
Craig J Brown, Pickering, CA;
Eco-Tec Limited, Pickering, CA;
Abstract
A process and apparatus for electroplating metals in which the metal salt concentration within the electroplating bath is reduced by providing an insoluble anode assembly in the bath. The insoluble anode assembly includes an enclosure which defines a compartment around an insoluble anode and which is formed at least in part by an anion exchange membrane. The primary reaction at the insoluble anode during electroplating is electrolysis of water to produce predominantly oxygen and hydrogen ions. The flow of current through the insoluble anode assembly causes anions in the plating solution to travel through the anion membrane into the compartment, resulting in an increase in acid concentration within the compartment. Accumulated acid is periodically flushed from the compartment.