EP 0828011 A1 19980311 - Coinage material and process for production thereof
Title (en)
Coinage material and process for production thereof
Title (de)
Münde und Verfahren zur Herstellung
Title (fr)
Matériau pour pièce de monnaie et procédé de sa fabrication
Publication
Application
Priority
GB 9618460 A 19960904
Abstract (en)
A coinage material comprises a ferritic blank, for example of mild steel, which has been surface-treated with an austenite-forming element such as nickel or manganese, and which has chromium diffused into the surface, such that a specific, marked difference, for example in electrical conductivity and/or magnetic permeability, which is electronically detectable exists between the surface and the interior. The coinage material may therefore be validated electronically using suitable detection means.
IPC 1-7
IPC 8 full level
C23C 10/02 (2006.01); G07D 5/08 (2006.01)
CPC (source: EP)
C23C 10/02 (2013.01); G07D 5/08 (2013.01)
Citation (search report)
- [Y] US 4973524 A 19901127 - HUEBNER ULRICH [DE], et al
- [YD] GB 862282 A 19610308 - CHROME ALLOYING COMPANY LTD
- [A] US 2819208 A 19580107 - PHILIPPE GALMICHE
- [A] DE 1774498 B1 19711223 - VER DEUTSCHE METALLWERKE AG
Designated contracting state (EPC)
AT DE FI FR GB IT SE
DOCDB simple family (publication)
EP 0828011 A1 19980311; CA 2214613 A1 19980304; GB 9618460 D0 19961016; KR 19980024324 A 19980706; ZA 977879 B 19980302
DOCDB simple family (application)
EP 97306863 A 19970904; CA 2214613 A 19970903; GB 9618460 A 19960904; KR 19970045699 A 19970904; ZA 977879 A 19970902