Rare metal compounds and mixtures of these

Details Rare metal compounds and mixtures of these Rare metal compounds and mixtures of these

2008-07-15

2008-07-15

Aulakh, Charanjit S (Department: 1625)

Compositions

Light transmission modifying compositions

Displaying color change

C235S491000, C252S301260, C252S588000, C252S589000, C534S016000, C534S551000, C546S002000, C546S008000, C546S156000

Reexamination Certificate

active

07399434

ABSTRACT:
An article of manufacture marked with compositions comprising rare earth metal compounds which, due to their luminescence when irradiated with UV light, are suitable in particular for the marking of security-relevant items, such as documents or data carriers.

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G. Kallistratos, Chimika Chronika, New Series, 11, 249-266 (1982).
H.G. Brittain and F.S. Richardson, J. Amer. Chem. Soc. 99, 65-70 (1977).

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