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:
Mar. 20, 1984
Filed:
Nov. 16, 1981
Applicant:
Inventors:
Yoji Arita, Yokohama, JP;
Yuzo Seo, Yokohama, JP;
Assignee:
Itsubishi Keikinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C25C / ; C25C / ;
U.S. Cl.
CPC ...
204 67 ;
Abstract
Increase or decrease in a quantity of alumina presenting in a bath or a metal in an aluminum electrolytic cell is detected and a quantity of electric power supplied to the cell is increased or decreased in accordance with the result of detection. The detection is made by calculating a difference between a quantity of alumina supplied to the cell during an interval between an instant at which a previous anode effect has occurred or was anticipated to occur and an instant at which a present anode effect occurs or is anticipated to occur, and the quantity of alumina consumed during the interval.