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:
Jan. 03, 1989
Filed:
Jun. 01, 1987
Jean A Lochet, Metuchen, NJ (US);
Vanguard Research Associates, Inc., South Plainfield, NJ (US);
Abstract
A bath for producing deposits of gold by electrodeposition, comprising: an aqueous solution containing at least one soluble gold cyanide compound; formic acid in a concentration of at least 20 ml/l to about 150 ml/l of said bath solution, said formic acid concentrations being calculated on a 90% by weight grade of formic acid; a cobalt compound; sufficient alkali to bring the pH to within the range of 3.5 to 4.4; and as conductivity salts and inhibitors, malic acid or a combination thereof with gluconic acid or with a water soluble organophosphorus chelating agent, said conductivity salts and inhibitors being present in at least sufficient quantity to provide a specific gravity of at least 13 Baume' in said bath.