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. 12, 1989
Filed:
Nov. 04, 1988
Robert L Martinou, Bry sur Marne, FR;
Michel M Ruimi, Paris, FR;
Abstract
In an electrolytic process of silvering stainless steel parts having a hardness of at least 58 HRc, the parts are subjected to degreasing with a solvent and by electrolysis in an alkaline atmosphere before undergoing electrolytic attack in an acid atmosphere, Wood prenickeling, electrolytic neutralization and then electroytic silvering in two successive distinct operations, these being a presilvering operation in a cyanide bath such that the free KCN/metal Ag ratio is at least 15, and a silvering operation in a similar bath which also contains potash and in which the free KCN/metal Ag ratio is about 10 times lower than in the presilvering bath. The process enables thin, adherent silver coatings to be deposited in a consistent manner on stainless steel parts, such as ball or roller races, before applying a self-lubricating coating to the parts.