Patents by Inventor Georg Riepl

Georg Riepl 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 for preparing aqueous, protective colloid stabilized vinyl ester homopolymer and copolymer dispersions
    Patent number: 6489391
    Abstract: The invention provides a method of producing aqueous, protective colloid stabilized vinyl ester homo- and co-polymer dispersions with a defined solids content by emulsion polymerization in the presence of a protective colloid. The method specifies that a dispersion with a solids content lower than the defined solids content is produced and then thickened to the defined solids content after the polymerization has been completed. The dispersion is thickened by adding a polymer powder which is of the same polymer composition as the emulsion polymerizate and which can be redispersed in water.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: December 3, 2002
    Assignee: Wacker-Chemie GmbH
    Inventors: Bernd Schilling, Georg Riepl
  • Liquid-crystalline polymers containing chromophoric side groups
    Patent number: 5098978
    Abstract: The invention relates to cholesteric organic polymers which contain, in the side groups, both mesogens, at least some of which are optically active, and chromophoric groups.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: March 24, 1992
    Assignee: Consortium fur elektrochemisch Ind. GmbH
    Inventors: Georg Riepl, Franz-Heinrich Kreuzer, Alfred Miller