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:
Jun. 01, 1982
Filed:
May. 20, 1981
Applicant:
Inventors:
Richard A Bemis, Clarksburg, MA (US);
Clinton E Hutchins, Pownal, VT (US);
Edward J Markland, North Adams, MA (US);
Mulk R Arora, Williamstown, MA (US);
Assignee:
Sprague Electric Company, North Adams, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ; C25F / ;
U.S. Cl.
CPC ...
2041299 ; 2041294 ; 20412995 ;
Abstract
Aluminum capacitor foil is etched in a bath at 30.degree. to 45.degree. C. containing 0.5 to 1.8 M hydrochloric acid, 0.05 to 0.3 M phosphoric acid, 0.2 to 0.5 aluminum chloride and 0.09 to 1.0 M alkali or alkaline earth metal chloride while being subjected to alternating current at 15 to 36 Hz frequency.