Ink compositions containing lanthanide complexes

Compositions: coating or plastic – Coating or plastic compositions – Marking

Reexamination Certificate

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Details

C106S031600, C106S031430, C106S031750, C106S031470, C106S031490, C106S031770, C106S031780, C252S301160, C252S301340, C252S301350, C427S466000, C427S511000, C427S394000

Reexamination Certificate

active

07108742

ABSTRACT:
The invention relates to an ink composition containing (a) a compound of formula (I), Lm−Ln3+(Ch−)n(I), wherein Ln represents a lanthanide, CH−is a negatively charged ligand containing at least one UV absorbing double bond, n denotes 3 or 4, m denotes a number from 1 to 4, in case n is 3, m denotes a number from 1 to 4 and L is a neutral monodentate or polydentate nitrogen-, oxygen- or sulfur-containing UV absorbing ligand with the exception of 2,2′-bipyridyl or, in case n is 4, m denotes 1 and L is a single-charged cation; and (b) a liquid ink carrier, which can be used for applying hidden mark on objects which can only be revealed under UV exposure.

REFERENCES:
patent: 3473027 (1969-10-01), Freeman et al.
patent: 4736425 (1988-04-01), Jalon
patent: 4891505 (1990-01-01), Jalon
patent: 5158703 (1992-10-01), Takuma et al.
patent: 5837042 (1998-11-01), Lent et al.
patent: 6071632 (2000-06-01), Hall-Goulle
patent: 6846350 (2005-01-01), Imanishi et al.
patent: 2003/0110979 (2003-06-01), Imanishi et al.
patent: 63/191870 (1988-08-01), None
patent: 64/006085 (1989-01-01), None
patent: 03/050291 (1991-03-01), None
patent: 2002037791 (2002-02-01), None
patent: 2002/173622 (2002-06-01), None
patent: 96/20942 (1996-07-01), None
patent: 97/10307 (1997-03-01), None
Derwent abstract of JP03/050291, Mar. 1991.
Derwent abstract of JP2002/2173622, Jun. 2002.
Derwent abstract of JP63/191870, Aug. 1988.
Derwent abstract of JP01/006085, Jan. 1989.
Derwent abstract of JP2002037791, Feb. 2002.
Derwent Abstract 1999-017829 [02] for JP 10287043, Oct. 1998.
Derwent Abstract 79-05039B for JP 53140105, Dec. 1978.

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