Patents by Inventor Hans-Henning Bunge

Hans-Henning Bunge has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Water-soluble dye composition
    Patent number: 4066595
    Abstract: A water-soluble dye containing composition which comprises of a dye which is soluble in a water-miscible solvent and is insoluble in water alone, a water-miscible solvent and a water-soluble resin. These compositions may be prepared by first dissolving a dye in a water-miscible solvent and thereafter adding the dye solution to an aqueous solution of a resin. The resulting compositions are useful to color aqueous resin emulsions.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: January 3, 1978
    Assignee: Ciba-Geigy Corporation
    Inventor: Hans-Henning Bunge