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. 09, 1976
Filed:
Dec. 17, 1973
Applicant:
Inventors:
Donald G Foulke, Plainfield, NJ (US);
John M Deuber, Nutley, NJ (US);
Assignee:
Oxy Metal Industries Corporation, Warren, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ;
U.S. Cl.
CPC ...
204 / ; 204 / ; 204 44 ;
Abstract
Disclosed is an improved electroplating bath and process for obtaining semi-bright to bright electrodeposits of gold and gold alloys. The electroplating bath contains a gold sulfite complex and a nitrogen-free diphosphonic compound having at least two phosphonic groups attached directly to a carbon atom. Presence of the nitrogen-free phosphonate compound enhances the stability of the gold sulfite baths and improves the brightness of electrodeposits obtained therefrom.