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. 11, 1983
Filed:
Apr. 28, 1981
John Lenoir, Fribourg, CH;
Gerald Jan, Fribourg, CH;
Ciba-Geigy AG, Basel, CH;
Abstract
Azo dyes of the formula in which X.sub.1 and X.sub.2 independently of one another are alkyl, cycloalkyl, alkenyl, aryl or aralkyl, Y.sub.1 is hydrogen or alkyl, Y.sub.2 is hydrogen, alkyl, alkenyl or aryl or together with Y.sub.1 stands for the atoms required to complete a ring, Z.sub.1 is hydrogen, alkyl, alkenyl, alkoxy, aryl, aryloxy, alkylmercapto, arylmercapto, halogen, cyano, carbalkoxy or stands for the atoms which together with Y.sub.1 form a ring, and D.sub.1 is the radical of a heterocyclic azo component such as a thienyl, thiazolyl, benzthiazolyl, pyrazolyl or imidazolyl radical, or is phenyl optionally substituted by alkyl, cycloalkyl, alkoxy, alkenyl, electronegative substituents such as halogen, cyano, nitro or carboxylic acid, alkyl- or phenylsulfone or N-alkyl or N,N-dialkyl-substituted sulfonamido, can be used as image dyes in photographic silver dye-bleach materials, or for dyeing textile materials.