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:
Dec. 18, 1979
Filed:
Jan. 15, 1976
Applicant:
Inventor:
Donald W Thomson, East Northport, NY (US);
Assignee:
Lea-Ronal, Inc., Freeport, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 44 ;
Abstract
Gold base alloys containing copper and cadmium are deposited from aqueous plating baths comprising an aqueous alkaline bath containing soluble gold and copper cyanide compounds, a cadmium compound, free cyanide, and an effective amount of a chelating agent capable of chelating cadmium in the presence of free cyanide. The aqueous plating baths can also advantageously contain water soluble polyoxyalkylene compounds that act as brighteners in the above gold-copper-cadmium plating baths. The water soluble polyoxyalkylene compounds also act as brighteners in the gold-copper-cadmium baths in the absence of a chelating agent.