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. 27, 1979
Filed:
May. 15, 1978
Applicant:
Inventor:
John J Randall, Jr, Williamstown, MA (US);
Assignee:
Sprague Electric Company, North Adams, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 / ; 204 58 ;
Abstract
Current efficiency is increased in the anodization of aluminum foil for electrolytic capacitors by carrying out the anodization below 90.degree. C. in a non-aqueous ethylene glycol-ammonium pentaborate bath containing a small amount of an orthophosphate source, e.g., ammonium dihydrogen phosphate.