EP 0980763 B1 20031015 - Security document with light-active dyes for authenticity verification
Title (en)
Security document with light-active dyes for authenticity verification
Title (de)
Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung
Title (fr)
Document de securité avec des colorants optiquement excitables pour validation
Publication
Application
Priority
DE 19836813 A 19980814
Abstract (en)
[origin: EP0980763A1] The document contains an optically excitable color (3) used to detect a defined emission spectrum for the document and provides a characteristic spectrum for the document. The spectrum is characteristic for the color embedded in the document and for the material of the document. The color is directly applied on or in the document or is embedded in it. The document has a color (3) embedded in a carrier material (4) to form a laser active element. Colors used for different valuable and security documents have different emission properties providing reliable differentiation of different documents. Alternatively the color is embedded in a resonator or pigment platelet consisting of a carrier layer coated on both sides by reflective coating.
IPC 1-7
IPC 8 full level
B41M 3/14 (2006.01); B42D 15/00 (2006.01)
CPC (source: EP US)
B42D 25/23 (2014.10 - US); B42D 25/29 (2014.10 - EP US); B41M 3/14 (2013.01 - EP US); B41M 5/287 (2013.01 - EP US); B42D 2035/34 (2022.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0980763 A1 20000223; EP 0980763 B1 20031015; AT E251994 T1 20031115; DE 19836813 A1 20000224; DE 59907352 D1 20031120; US 6234537 B1 20010522
DOCDB simple family (application)
EP 99115363 A 19990804; AT 99115363 T 19990804; DE 19836813 A 19980814; DE 59907352 T 19990804; US 37488299 A 19990813