Lightfast colorant and lightfast ink composition including...

Details Lightfast colorant and lightfast ink composition including... Lightfast colorant and lightfast ink composition including...

2007-02-06

2007-02-06

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

C534S810000, C534S812000, C534S829000, C534S860000, C552S212000, C106S031440, C106S031500, C106S031510, C106S031520, C106S031750, C106S031790, C106S031800, C106S031810

Reexamination Certificate

active

10772286

ABSTRACT:
A lightfast colorant and a lightfast ink composition including the lightfast colorant utilize a lightfast colorant that is derived by covalently binding a cinnamate derivative and a conventional colorant. The lightfast colorant improves storage stability as well as lightfastness when added to an ink composition.

REFERENCES:
patent: 4273926 (1981-06-01), Frishberg
patent: 4552951 (1985-11-01), Gourley
patent: 4552952 (1985-11-01), Gourley
patent: 4554348 (1985-11-01), Gourley
patent: 4593087 (1986-06-01), Gourley
patent: 4593088 (1986-06-01), Gourley
patent: 5387262 (1995-02-01), Nelson
patent: 5876492 (1999-03-01), Malhotra et al.
patent: 5922117 (1999-07-01), Malhotra et al.

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