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. 02, 1987
Filed:
Sep. 25, 1986
Applicant:
Inventor:
Jean A Lochet, Metuchen, NJ (US);
Assignee:
Vanguard Research Associates, Inc., South Plainfield, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 443 ; 204 28 ;
Abstract
In the electrodeposition of gold by electrolyzing an aqueous solution containing potassium gold cyanide, the improvement which comprises including in the solution a critical concentration of formic acid, a phosphonic acid type chelating agent and a cobalt or nickel compound, at a critical pH, to achieve extremely rapid plating speeds. Relatively high plating temperatures in the range of about 90.degree. to 160.degree. F. and high current densities ranging up to about 1000 ASF may be used to achieve fast plating speeds without degradation of the quality of the deposit.