The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1977
Filed:
Jan. 31, 1975
Antoine Georges Breda, Boisguillaume, FR;
Claude Marie Brouard, Sotteville les Rouen, FR;
Produits Chimiques Ugine Kuhlmann, Paris, FR;
Abstract
Chromiferous complex dyestuff of the formula: ##STR1## in which A represents a hydrogen atom, an unsubstituted phenyl group or a phenyl group substituted by one or two halogen atoms or alkyl groups containing 1 to 4 carbon atoms and the nucleus B is unsubstituted or substituted by one or two chlorine atoms; salts of such dyestuff; process for the preparation of such a dyestuff which comprises reacting in equimolecular proportions the 1/1 chromiferous complex of a monoazo dyestuff of the formula: ##STR2## and a monoazo dyestuff of the formula: ##STR3## or, conversely, the 1/1 chromiferous complex of a monoazo dyestuff of formula (III) and a monoazo dyestuff of formula (II) wherein A and B have the meanings given above; process for the coloration or dyeing in bulk of a synthetic polyamide in which the coloring agent is a dyestuff of the formula given above or a salt thereof and materials and articles of synthetic polyamide dyed or colored in bulk by means of chromiferous complex of the formula given above or a salt thereof.