Patents by Inventor Angelika Grau

Angelika Grau 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).

  • Method for producing coated mineral shaped bodies
    Patent number: 6709710
    Abstract: The invention relates to a method for producing coated mineral shaped bodies by applying an aqueous coating agent containing a polymer dispersion serving as a bonding agent and at least one aqueous styrene maleic anhydride copolymer solution. The shaped body is subsequently hardened and the coating agent is dried. The invention is characterized in that the at least one aqueous styrene maleic anhydride copolymer solution is added to the polymer dispersion after completion of the polymerization. The shaped bodies coated in such a manner exhibit an improved efflorescence behavior. The method is particularly suited for coating roofing tiles and fibrated concrete slabs.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: March 23, 2004
    Assignee: Celanese Emulsions GmbH
    Inventors: Stephan Krieger, Angelika Grau
  • Method for producing coated mineral shaped bodies
    Publication number: 20030161960
    Abstract: The invention relates to a method for producing coated mineral shaped bodies by applying an aqueous coating agent containing a polymer dispersion serving as a bonding agent and at least one aqueous styrene maleic anhydride copolymer solution. The shaped body is subsequently hardened and the coating agent is dried. The invention is characterized in that the at least one aqueous styrene maleic anhydride copolymer solution is added to the polymer dispersion after completion of the polymerization. The shaped bodies coated in such a manner exhibit an improved efflorescence behavior. The method is particularly suited for coating roofing tiles and fibrated concrete slabs.
    Type: Application
    Filed: February 25, 2003
    Publication date: August 28, 2003
    Inventors: Stephan Krieger, Angelika Grau