The Nitrogen And The Oxygen Are Bonded Directly To The Same Bicyclo Ring System Patents (Class 534/877)
Sulfonyl bonded directly to the bicyclo ring system (Class 534/878)
  • 8-hydroxyquinoline sulfonic acid-azo chromium complexes
    Patent number: 4617382
    Abstract: The present invention relates to novel chromium complex dyes of the formula ##STR1## wherein Z is hydrogen, chloro, bromo, nitro, lower alkyl or acylamino;L is H.sub.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: October 14, 1986
    Assignee: Ciba-Geigy Corporation
    Inventors: Gerhard Back, Fabio Beffa, Arthur Buhler