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. 22, 1983
Filed:
Jan. 11, 1982
Applicant:
Inventors:
Robert C Kerby, Rossland, CA;
Clifford J Krauss, Trail, CA;
Assignee:
Cominco Ltd., , CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204114 ;
Abstract
Improvements in the bipolar refining of lead are described, comprising maintaining a high current density controlled at a value such that the anode overvoltage will not exceed the value at which impurities dissolve and which is related to the internal resistance of the cell, together with periodic reversal of the polarity of the current applied to the electrodes. These improvements result in improved cell efficiency and in the formation of strong, coherent lead deposits which are easily stripped by mechanical means.