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US 4,453,942 AGranted
Use of 1:2 cobalt complex dyes for dyeing leather or furs
AssigneeCiba-Geigy Corporation
InventorAlois Puntener
Life of this patent
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Abstract
The dyes of the formula I given in claim 1 are suitable for dyeing furs and in particular leather. They are preferably used in admixture with a blue dye and a red dye for the trichromatic dyeing of leather.
Claims9
A process of dyeing, comprising the application of a dye of the formula ##STR17## wherein Ka.sup..sym. is a cation and m and n independently of one another are each 1 or 2, to leather or furs.
Dependencies are inferred from the claim text.