Patents by Inventor Matthew W. Schaefer

Matthew W. Schaefer 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).

  • Semiconductive zirconia sintering material comprising aluminum oxide
    Patent number: 6872676
    Abstract: The present invention provides a semiconductive zirconia sintering material comprising more than 2% by weight of aluminum oxide and sintered zirconia material derived therefrom as well as a method of producing the sintered material. The sintered semiconductive zirconia materials of the present invention have a better physical and mechanical properties than conventional sintered semiconductive zirconia materials.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: March 29, 2005
    Assignee: CoorsTek, Inc.
    Inventors: Matthew W. Schaefer, Frank E. Anderson, Brian Seegmiller
  • Semiconductive zirconia sintering material comprising aluminum oxide
    Publication number: 20040029337
    Abstract: The present invention provides a semiconductive zirconia sintering material comprising more than 2% by weight of aluminum oxide and sintered zirconia material derived therefrom as well as a method of producing the sintered material. The sintered semiconductive zirconia materials of the present invention have a better physical and mechanical properties than conventional sintered semiconductive zirconia materials.
    Type: Application
    Filed: April 25, 2003
    Publication date: February 12, 2004
    Applicant: CoorsTek, Inc.
    Inventors: Matthew W. Schaefer, Frank E. Anderson, Brian Seegmiller