Patents Assigned to James R. Glidwell Dental Ceramics, Inc.
  • Patent number: 9512317
    Abstract: A colored ceramic powder is produced from a mixture of coloring solutions consisting of metallic salts that are introduced to a ceramic slurry and subsequently dried. The coloring solution may comprise for example of chosen metallic salts, a solvent, an organic solvent such as derivatives of propylene oxides, an acid and a possible binder. Once all the constituents are thoroughly mixed to a homogeneous state, the slip is dried to a powder form, which spray drying equipment can be used. The dried powder can then be subjected to an isostatic or biaxial press manufacturing process to create a green state ceramic body. Once pressed, the ceramic body can be subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia dental restorations.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: December 6, 2016
    Assignee: James R. Glidwell Dental Ceramics, Inc.
    Inventors: Robin A. Carden, Thomas C. Valenti, Frank A. Jimenez