06841092 is referenced by 5 patents and cites 13 patents.

The present invention provides a secured document including a composition capable of anti-Stokes fluorescence containing an ion capable of absorption of electromagnetic radiation, an ion capable of emitting electromagnetic radiation, and a matrix composition comprising gadolinium, yttrium, lanthanum, and lutetium, wherein the wavelength of the emitted electromagnetic radiation is shorter than the wavelength of the absorbed electromagnetic radiation, and wherein the concentrations of the absorbing and emitting ions are adjusted to achieve concentration quenching of anti-Stokes luminescence.

Title
Anti-stokes fluorescent compositions and methods of use
Application Number
10/101524
Publication Number
6841092 (B2)
Application Date
March 18, 2002
Publication Date
January 11, 2005
Inventor
Wolfgang Kempfert
Bad Liebenstein
DE
Detlef Starick
Bad Liebenstein
DE
Wolfgang Schmidt
Berlin
DE
Arnim Franz Burgholtz
Falkensee
DE
Oliver Muth
Berlin
DE
Anett Bailleu
Berlin
DE
Benedikt Ahlers
Berlin
DE
Manfred Paeschke
Basdorf
DE
Agent
Darby & Darby
Assignee
Fa Leuchtstoffwerk Breitungen
DE
Bundesdruckerei
DE
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