Patents Examined by Philip R. Datlow
  • Fiber-reactive triphenodioxazine dyes
    Patent number: 5532362
    Abstract: The present invention is directed to a dioxazine dye which provides brilliant reddish blue dyeings possessing superior fastness properties and high tinctorial strength.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 2, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Walter Helmling, David Brunetti, Uwe Reiher