Patents by Inventor Holger Schöpke

Holger Schöpke 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).

  • Sizing agent for staple fiber and filament yarns
    Patent number: 5208075
    Abstract: Water-soluble or water-dispersible grafts of proteins with monoethylenically unsaturated monomers are used as sizing agents for staple fiber and filament yarns.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: May 4, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Kroner, Manfred Niessner, Heinrich Hartmann, Dieter Voelker, Juergen Hartmann, Holger Schoepke
  • Preparation of aqueous polyester dispersions and use thereof
    Patent number: 4943602
    Abstract: Aqueous polyester dispersions are prepared by(a) condensing an aromatic dicarboxylic acid or ester with at least one diol to give a prepolymer having an acid number of from 2 to 8,(b) reacting the prepolymer with at least one molecular weight enhancer compound, e.g. trimellitic anhydride to give a polyester having an acid number of from 40 to 60, and(c) dispersing the polyester in an aqueous medium to form an aqueous dispersion by adding an aqueous mixture of ammonia and an amine in a molar ratio of from 10:1 to 1:10 to a melt of the polyester which has a temperature within the range from 150.degree. to 230.degree. C.,and are used as sizes for sizing filament warp yarns.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: July 24, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Brueckmann, Heinz Leitner, Holger Schoepke