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. 07, 1984
Filed:
May. 24, 1982
Applicant:
Inventors:
Harold J Anderson, Oakville, CA;
Robert C Kerby, Rossland, CA;
Clifford J Krauss, Trail, CA;
Hubert W Neame, Mississauga, CA;
Assignee:
Cominco Ltd., , CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204114 ; 204117 ; 204228 ; 204D / ; 323247 ;
Abstract
A method and apparatus for effecting periodic current reversal in metal electro-deposition processes are disclosed. By using a circuit in which the current always flows in the same direction through a filter reactor, regardless of the current flow through the electro-deposition cell, faster reversal switching times are obtained. The overshoot and AC ripple encountered on current reversal are also decreased.