Patents by Inventor Grit Michael

Grit Michael 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).

  • Bearings produced from silicon nitride substances containing sintering additives and SiO
    Patent number: 7244686
    Abstract: The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and optionally, up to 10 mole %, based on the amount of silicon nitride, of an additive that reacts with silicon nitride, said additive selected from the group consisting of TiO2, WO3, MoO3 and mixtures thereof.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: July 17, 2007
    Assignee: H.C. Starck Ceramics GmbH & Co. KG
    Inventors: Gerhard Wötting, Mathias Herrmann, Grit Michael, Stefan Siegel, Lutz Frassek
  • Bearings produced from silicon nitride substances containing sintering additives and SiO2
    Publication number: 20070060466
    Abstract: The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and optionally, up to 10 mole %, based on the amount of silicon nitride, of an additive that reacts with silicon nitride, said additive selected from the group consisting of TiO2, WO3, MoO3 and mixtures thereof.
    Type: Application
    Filed: October 19, 2006
    Publication date: March 15, 2007
    Inventors: Gerhard Wotting, Mathias Herrmann, Grit Michael, Stefan Siegel, Lutz Frassek
  • SILICON NITRIDE SUBSTANCES CONTAINING SINTERING ADDITIVES AND SIO2, METHOD FOR PRODUCING THEM AND USE OF THE SAME
    Publication number: 20030134737
    Abstract: The invention relates to silicon nitride substances containing sintering additives and SiO2, a method for producing them and the use of the same.
    Type: Application
    Filed: April 17, 2000
    Publication date: July 17, 2003
    Inventors: GERHARD WOTTING, MATHIAS HERRMANN, GRIT MICHAEL, STEFAN SIEGEL, LUTZ FRASSEK