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:
Aug. 31, 1976
Filed:
Dec. 04, 1974
Fabio Beffa, Riehen, CH;
Alfred Fasciati, Bottmingen, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
1:2 Chromium complex dyes of the formula ##SPC1## Wherein A represents the radical of a diazo component, B represents the radical of a coupling component, --X-- is --O--, --NH--, ##EQU1## --Y-- is --O-- or --COO--, R.sub.1 is hydrogen or alkyl and R.sub.2 is a radical of the benzene or naphthalene class which is substituted by a carboxy or a sulpho group, K.sup.+ represents a cation, and wherein the benzene ring b can carry a further fused benzene ring or can be substituted by halogen, nitro, low molecular alkyl or alkoxy as well as arylazo groups, and the radicals A and B are devoid of --SO.sub.3 H and --COOH groups. These dyes are useful for dyeing and printing natural and synthetic polyamides to produce level dyeings of good fastness, especially fastness to pulling, water and perspiration.