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:
Apr. 09, 1991
Filed:
Aug. 29, 1990
Applicant:
Inventors:
Werner Kuhn, Rodenbach, DE;
Wolfgang Zilske, Hanau, DE;
Assignee:
Degussa Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 44 ;
Abstract
Yellow to rose-colored gold alloy coatings with copper and silver are obtained from stable galvanic baths with a pH of 8.5 to 11 containing, 1 to 15 g/liter gold as potassium gold (I) cyanide, 5 to 50 g/liter copper as potassium copper (I) cyanide, 0.05 to 5 g/liter silver as potassium silver (I) cyanide and dipotassium hydrogenphosphate as well as alkali cyanides in amounts of up to 10 g/liter and 0.1-1 mg/liter potassium selenocyanate.