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US 4,460,505 AGranted
Dyestuffs, processes for their preparation and their use for dyeing materials containing hydroxyl groups or nitrogen
AssigneeBayer Aktiengesellschaft
InventorsKarl H. Schundehutte, Hermann Henk
Life of this patent
Estimating the term…
Abstract
The invention relates to new dyestuffs of the general formula ##STR1## wherein the radicals D, R and R' have the meaning given in the text of the application, processes for their preparation and their use for dyeing materials containing hydroxyl groups or nitrogen.
Claims3
Dyestuff having the formula ##STR139## wherein D represents unsubstituted phenyl or phenyl substituted by one or two sulpho groups.
Dyestuff of the formula ##STR140##
Dyestuff of the formula ##STR141##
Dependencies are inferred from the claim text.