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:
Mar. 06, 1979
Filed:
Sep. 30, 1977
Jacob Hyner, Waterbury, CT (US);
Stephen Gradowski, Torrington, CT (US);
Whyco Chromium Company, Inc., Thomaston, CT (US);
Abstract
A multi-layer plating and method are provided for improved corrosion resistance of ferrous metal substrates and articles made therefrom. The multi-layer plating comprises a metallic coating comprising a layer of zinc or cadmium and a layer of tin, each of which are preferably between 0.00001 to 0.001 inches in thickness, followed by a layer, preferably between about 0.0001 to 0.000001 inches in thickness of either chromium or a metallic chromium substitute. The method comprises plating, and preferably electroplating, the aforementioned layers of metal over an article having ferrous metal base stock to obtain improved corrosion resistance.