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:
May. 27, 1980
Filed:
May. 02, 1979
Applicant:
Inventors:
John J Randall, Jr, Williamstown, MA (US);
Walter J Bernard, Williamstown, MA (US);
Assignee:
Sprague Electric Company, North Adams, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 29 ; 204 33 ; 204 / ; 148-627 ;
Abstract
Aluminum electrolytic capacitor foil is treated prior to anodization in a two-step process in which a hydrous oxide film is first formed on the foil and the hydrous oxide is then modified. In the first step the foil is immersed in boiling water to form an appropriate thickness of hydrous oxide and in the second step it is immersed in a boiling aqueous solution containing phosphate, silicate, or tartrate ions, or combinations thereof. This treatment results in a decreased power consumption during anodization and produces a film having higher film capacitance.