Patents by Inventor Hans Georg Keppler

Hans Georg Keppler 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).

  • Utilization of constituents of effluent from the manufacture of styrene bead polymers in the manufacture of fibrids
    Patent number: 4104341
    Abstract: A process for the manufacture of fibrids by dissolving, in a solvent, macromolecular waste materials from the bead polymerization of styrenes, and introducing the solution into a precipitation medium under the action of shearing forces to form fibrids.
    Type: Grant
    Filed: April 6, 1976
    Date of Patent: August 1, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Georg Keppler, Bruno Sander, Rolf Moeller, Eckhard Bonitz, Werner Simmler
  • Manufacture of expandable styrene polymers
    Patent number: 4036794
    Abstract: A process for the manufacture of expandable styrene polymers by suspension polymerization of the monomers in the presence of blowing agents and suspension stabilizers, the latter having been manufactured by polymerization of vinyl monomers in the presence of vinylpyrrolidone polymers. The expandable styrene polymers can be further processed to give foams.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: July 19, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Georg Keppler, Erhard Stahnecker, Rolf Moeller
  • Agglomerating aqueous dispersions of synthetic rubber
    Patent number: 3956218
    Abstract: Mixtures of aqueous synthetic rubber dispersions of alkali-insoluble copolymers of minor amounts of ethylenically unsaturated monomers (a) which form water-soluble hompolymers and major amounts of ethylenically unsaturated monomers (b) which form water-insoluble homopolymers have large particle size and are less viscous and easier to process than aqueous dispersions of the same solids concentration having small particle size.
    Type: Grant
    Filed: October 26, 1971
    Date of Patent: May 11, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Hans Georg Keppler, Hermann Wesslau