Patents Examined by Delpak R. Rao
  • Reactive dyes from the dioxazine series, their preparation and use
    Patent number: 5772698
    Abstract: Compounds of the formula ##STR1## are described in which the variables are as defined in the claims and which are suitable as fiber-reactive dyes for dyeing a wide range of fiber materials.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: June 30, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Hans Reichert, Bernhard Muller