Patents Assigned to Ciba-Geiegy Corporation
  • Vat dye and sulfur dye compositions
    Patent number: 4886549
    Abstract: Specific vatting accelerators according to claims 1 and 2 are described. These can be added to a vat dye or sulfur dye composition, or to a dye bath or printing paste containing a vat dye or sulfue dye, by virtue of which an improvement of dye yield, particularly on cellulose materials, is obtained.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: December 12, 1989
    Assignee: Ciba-Geiegy Corporation
    Inventor: Zdenek Koci