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. 27, 1990
Filed:
May. 19, 1989
Ulrich Huebner, Werdohl, DE;
Horst Rinke, Ludensheid, DE;
Hans M Walter, Werdohl, DE;
Gerhard von Loh, Altena, DE;
VDM Nickel-Technologie Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
For use in the making of coins a laminated composite is proposed which can be used to substitute coins made of nickel and consists of a combination of a ferritic chromium steel and an austenitic nickel-chromium steel. In dependence of the nature of the existing system used to discriminate the nickel coins to be substituted, a laminated composite may be used which has a core layer consisting of the ferritic chromium steel and provided on both sides with a cladding having a thickness of 2 to 10% of the total thickness and consisting of the austenitic nickel-chromium steel, or a laminated composite which comprises a core layer consisting of the austenitic nickel-chromium steel and provided on both sides with a cladding having a thickness of 20 to 40% of the total thickness and consisting of the ferritic chromium steel. An optimum approxmation of the acceptability ranges adjusted for nickel in the discriminating systems can be achieved by a proper selection of the ratios of the thicknesses of the layers.