Patents by Inventor Hans Fierz

Hans Fierz 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).

  • Process and dye preparations for pad-dyeing
    Patent number: 4300900
    Abstract: A dye preparation containing at least one dye insoluble or difficultly soluble in water, an anionic or nonionic dispersing agent, at least one metal complex consisting of a polyvalent cation and at least one complexing agent, and optionally further additives, water and/or organic solvent.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: November 17, 1981
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland Putzar, Hans Fierz