Patents by Inventor Heinz Luthy

Heinz Luthy 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).

  • Patent number: 6126732
    Abstract: A shaped, high-strength dental ceramic prothesis is made by pressing a molding composition comprising about 1-50 wt % glass particles and about 50-99 wt % ceramic particles to form a ceramic frame, veneering the frame and firing the coated frame.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: October 3, 2000
    Assignee: Dentsply DeTrey GmbH
    Inventors: Carmen Hofmann, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda
  • Patent number: 5916498
    Abstract: A process for manufacturing a non-metallic dental prosthesis including a ceramic frame and an esthetic ceramic veneer including the steps of: preparing the ceramic frame by press molding a composition comprising from 1 to 50 parts by weight glass particles and from 50 to 99 parts by weight ceramic particles at a molding temperature from 800 to 1300.degree. C.; applying a slurry comprising a dental ceramic veneering composition to the thus prepared ceramic frame; and firing the ceramic frame having the slurry applied thereto at a temperature lower than the molding temperature to produce said dental prosthesis. The dental ceramic veneering composition may have a melting point at least 50.degree. C. less than the molding temperature.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: June 29, 1999
    Assignee: DENTSPLY DeTrey GmbH
    Inventors: Carmen Hofmann, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda
  • Patent number: 5849068
    Abstract: A shaped, high-strength dental ceramic prosthesis is made by pressing a molding composition including from about 1 to 50 percent by weight glass particles and from about 99 to about 50 percent by weight inorganic oxide particles at a pressure of from about 10 to about 40 MPa and a temperature of from about 1000.degree. to about 1200.degree. C. Dental prostheses prepared in accordance with the invention include crowns, bridges, inlays and onlays.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: December 15, 1998
    Assignee: Dentsply G.m.b.H.
    Inventors: Carmen Hofmann, geb. Roth, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda