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:
Nov. 29, 1983
Filed:
Dec. 06, 1982
Applicant:
Inventor:
John A Henricks, Oak Park, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428639 ; 204 40 ; 204 41 ; 428657 ; 428667 ; 428674 ; 428675 ; 428679 ;
Abstract
This invention is directed to the formation of highly protective electroplated multi-metal coatings over an iron basis metal. The high degree of protection is obtained by the deposition of three sucessive layers of two dissimilar metal layers that form a galvanic cell in which one of the two adjacent metals is anodic to the other so that the corroding anodic electroplate will spread the attack laterally and thus prevent the corrosive media from drilling through to the base metal. The coating comprises an initial layer of sulfur free nickel followed in sucession by a sulfur containing bright nickel, cadmium, copper, sulfur free nickel, sulfur containing nickel and microporous chromium.