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:
Nov. 30, 1982
Filed:
Jun. 26, 1981
Applicant:
Inventors:
Michael J Pryor, Woodbridge, CT (US);
Murray A Heine, Hamden, CT (US);
Andrew J Brock, Cheshire, CT (US);
Assignee:
Olin Corporation, New Haven, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
C23G / ; C23G / ;
U.S. Cl.
CPC ...
134-3 ; 134 28 ; 134 29 ; 134 30 ; 134 41 ;
Abstract
A rapid and effective surface cleaning process for copper alloys, particularly copper alloys containing aluminum and other metals tending to form surface coatings of refractory oxides during annealing treatments, consists of treating such alloys or articles fabricated thereof for a short time in a hot aqueous solution of an alkali hydroxide, rinsing with water, and then immersing for a short time in a hot aqueous solution of ferric sulfate, or other ferric salt of a mineral acid, followed by rinsing with water.