Patents by Inventor Heinz Uhrig

Heinz Uhrig 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).

  • Dispersing and stabilizing agents for dyestuffs
    Patent number: 3993439
    Abstract: Dispersions of pigments, disperse- or vat-dyestuffs, wherein the dispersing agent is formed either by co-condensation of a phenolic component, formaldehyde and an alkali metal sulfite or of a sulfonated phenolic component and formaldehyde. These dispersions are characterized in that the dispersing agent used shows an improved dispersing effect. Furthermore, they can also be used when being neutralized for the dispersing alkali sensitive dyestuffs and they show no tendency to soil the fabrics so that also clean shades may be dyed.
    Type: Grant
    Filed: October 26, 1973
    Date of Patent: November 23, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Reinhold Deubel, Helmut Diery, Wolfgang Klinner, Karl-Hermann List, Heinz Uhrig