Patents by Inventor Stephanie Grathwohl

Stephanie Grathwohl 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).

  • Casting composition
    Patent number: 5753741
    Abstract: In a casting composition comprising a curable syrup which contains a liquid monomer and polymer components optionally dissolved therein, and an inorganic filler which includes a quartz sand product, in order to simplify the production of white molded articles, it is proposed that a product, the individual grain of which consists in the core essentially of quartz and at the surface essentially of .alpha.-cristobalite (low-temperature modification) be selected as quartz sand product.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: May 19, 1998
    Assignees: Blanco GmbH & Co. KG, Schock & Co. GmbH
    Inventors: Stefan Harke, Stephanie Grathwohl, Klaus Hock, Rudolf Paternoster, Werner Fenzl, Norbert Fenten