Cyano, Carbonyl, Nitrogen Or Sulfur Bonded Directly To The Tetracyclo Ring System Patents (Class 552/287)
  • Mixtures of dicyanobenzanthrone compounds
    Patent number: 5049161
    Abstract: Dye mixtures particularly suitable for dyeing polyester material by the exhaust process containing at least two dicyanobenzanthrone compounds of the formula ##STR1## wherein R is hydrogen or a substituted or unsubstituted alkyl or aryl group and X is hydrogen or halogen located in the 6- or 7-position.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: September 17, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Jean-Marie Adam
  • Dicyanobenzanthrone compounds
    Patent number: 4992569
    Abstract: The dyes of the formula (1) as defined in claim 1 are suitable in particular for the dyeing of polyester textile material by the exhaust process.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: February 12, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Jean-Marie Adam