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:
Apr. 26, 1983
Filed:
Nov. 16, 1981
Applicant:
Inventor:
Mulk R Arora, Williamstown, MA (US);
Assignee:
Sprague Electric Company, North Adams, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ;
U.S. Cl.
CPC ...
20412975 ; 20412995 ;
Abstract
Aluminum electrolytic capacitor foil is etched by passing the foil through an electrolyte bath containing 2.5 moles/liter of sodium chloride and 0.08 to 0.48 moles/liter of boric acid or 0.05 to 0.07 moles/liter of a citrate ion source under the influence of direct current and at a temperature of 90.degree. to 95.degree. C. The foil thus etched has a central metallic core which results in improved mechanical properties.