Formazan dyestuffs

US5220057A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Thomas Eizenhofer · Neunburg vorm Wald, DE
• Karl-Josef Herd · Odenthal, DE
• Hermann Henk · Cologne, DE
• Rolf Brockmann · Bensberg, DE
• Frank-Michael Stohr · Odenthal, DE
• Karl H. Schundehutte · Leverkusen, DE

Key dates

• Filing date: Feb 11, 1991
• Grant date: Jun 15, 1993
• Expiry date: Feb 11, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula ##STR1## in which the substituents have the meanings given in the description are suitable for the dyeing and printing of hydroxyl- and amido-containing materials.