Patents by Inventor Christian Ritzberger

Christian Ritzberger 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).

  • Lithium silicate glass ceramic and lithium silicate glass comprising a monovalent metal oxide
    Patent number: 9101439
    Abstract: Lithium silicate glass ceramics and glasses comprising specific oxides of monovalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: August 11, 2015
    Assignee: Ivoclar Vivadent, AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Inorganic-inorganic composite material and method for producing the same
    Patent number: 9090511
    Abstract: Process for producing an inorganic-inorganic composite material, in which an open-pore, crystalline oxide ceramic shaped part is produced from an oxide ceramic powder or a powder of an oxide ceramic mixture after shape-imparting processing and presintering, an infiltration substance is applied to this shaped part in vacuo and at room temperature, and the oxide ceramic is sintered in a densifying manner under an air atmosphere and at ambient pressure to form an inorganic-inorganic composite material.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: July 28, 2015
    Assignee: Ivoclar Vivadent AG
    Inventors: Frank Rothbrust, Christian Ritzberger, Volker Rheinberger, Wolfram Höland
  • CeO2-STABILIZED ZrO2 CERAMICS FOR DENTAL APPLICATIONS
    Publication number: 20150191397
    Abstract: The present invention is directed to a porous pre-densified CeO2 stabilized ZrO2 ceramic having a density of 50.0 to 95.0%, relative to the theoretical density of zirconia, and an open porosity of 5 to 50% as well as to a densified CeO2 stabilized ZrO2 ceramic having a density of 97.0 to 100.0%, relative to the theoretical density of zirconia, and wherein the grains of the ceramic have an average grain size of 50 to 1000 nm, methods for the preparation of the pre-densified and densified ceramics and their use for the manufacture of dental restorations.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 9, 2015
    Inventors: Christian Ritzberger, Frank Rothbrust, Marcel Schweiger, Nicolas Courtois, Jérôme Chevalier, Helen Reveron, Wolfram Höland, Volker Rheinberger
  • PRE-SINTERED BLANK FOR DENTAL PURPOSES
    Publication number: 20150140274
    Abstract: Pre-sintered blanks based on lithium disilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Application
    Filed: May 10, 2013
    Publication date: May 21, 2015
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger
  • PRE-SINTERED BLANK FOR DENTAL PURPOSES
    Publication number: 20150140513
    Abstract: Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Application
    Filed: May 10, 2013
    Publication date: May 21, 2015
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger, Diana Tauch
  • LITHIUM SILICATE MATERIALS
    Publication number: 20150094197
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
    Type: Application
    Filed: December 11, 2014
    Publication date: April 2, 2015
    Inventors: Elke Signer-Apel, Wolfram Höland, Marcel Schweiger, Christian Ritzberger, Harald Bürke, Volker Rheinberger
  • LITHIUM DISILICATE-APATITE GLASS-CERAMIC
    Publication number: 20150087493
    Abstract: Lithium disilicate apatite glass-ceramics are described which are characterized by a high chemical stability and can therefore be used in particular as restoration material in dentistry.
    Type: Application
    Filed: April 25, 2013
    Publication date: March 26, 2015
    Inventors: Christian Ritzberger, Wolfram Holand, Marcel Schweiger, Volker Rheinberger
  • Composite Ceramic Material Comprising Zirconia
    Publication number: 20150035210
    Abstract: The invention relates to a composite ceramic material which comprises: (a) a first phase based on zirconia containing CeO2 as stabilizer, and (b) a second phase based on an aluminate. The invention also relates to a ceramic powder composition, processes for the preparation of the composite ceramic material and the ceramic powder composition as well as uses thereof.
    Type: Application
    Filed: October 16, 2014
    Publication date: February 5, 2015
    Inventors: Wolfram Holand, Elke Signer-Apel, Christian Ritzberger, Frank Rothbrust, Heinrich Kappert, Volker Rheinberger, Jerome Chevalier, Helen Reveron, Nicolas Courtois, Ricardo Dellagiacomo
  • Lithium silicate materials
    Patent number: 8940651
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: January 27, 2015
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Signer-Apel, Wolfram Höland, Marcel Schweiger, Christian Ritzberger, Harald Bürke, Volker Rheinberger
  • Process For The Preparation Of Dental Restorations
    Publication number: 20140363792
    Abstract: The invention relates to a process for preparing dental restorations, wherein a lithium silicate glass ceramic or a lithium silicate glass is used which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: Christian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
  • Composite ceramic material comprising zirconia
    Patent number: 8889576
    Abstract: The invention relates to a composite ceramic material which comprises: (a) a first phase based on zirconia containing CeO2 as stabilizer, and (b) a second phase based on an aluminate. The invention also relates to a ceramic powder composition, processes for the preparation of the composite ceramic material and the ceramic powder composition as well as uses thereof.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: November 18, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Elke Apel, Christian Ritzberger, Frank Rothbrust, Heinrich Kappert, Volker Rheinberger, Jérôme Chevalier, Helen Reveron, Nicolas Courtois, Ricardo Dellagiacomo
  • Lithium Silicate Glass Ceramic And Glass With Transition Metal Oxide
    Publication number: 20140335473
    Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides. The invention also relates to a corresponding lithium silicate glass, a process for the preparation of the glass ceramic and of the glass as well as their use.
    Type: Application
    Filed: May 12, 2014
    Publication date: November 13, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
  • Process for the preparation of dental restorations
    Patent number: 8865606
    Abstract: The invention relates to a process for preparing dental restorations, wherein a lithium silicate glass ceramic or a lithium silicate glass is used which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: October 21, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
  • LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A HEXAVALENT METAL OXIDE
    Publication number: 20140232030
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of hexavalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 21, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A DIVALENT METAL OXIDE
    Publication number: 20140228196
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of divalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 14, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A TRIVALENT METAL OXIDE
    Publication number: 20140225290
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of trivalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 14, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A TETRAVALENT METAL OXIDE
    Publication number: 20140223965
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of tetravalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 14, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Shaded zirconia ceramics
    Patent number: 8796166
    Abstract: The invention relates to compositions based on Ce-stabilized ZrO2, and single- and multi-colored blanks made from oxide ceramics, and a process for their preparation, in which oxide ceramic powder is coated with a coloring substance, the coated powders are preferably graded and at least one colored powder is filled into a compression mould, the colored powder or powders are compressed to produce a shaped body, and the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations. The compositions exhibit high fracture toughness and high flexural strength.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: August 5, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jérôme Chevalier, Dmitri Brodkin
  • Lithium silicate glass ceramic and glass with ZrO2 content
    Patent number: 8778075
    Abstract: Lithium silicate glass ceramics and glasses are described which can advantageously be applied to zirconium oxide ceramics in particular by pressing-on in the viscous state and form a solid bond with these.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: July 15, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Ricardo Dellagiacomo, Marcel Schweiger, Harald Bürke, Wolfram Höland, Volker Rheinberger
  • Lithium silicate glass ceramic and glass with transition metal oxide
    Patent number: 8759237
    Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides. The invention also relates to a corresponding lithium silicate glass, a process for the preparation of the glass ceramic and of the glass as well as their use.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: June 24, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Wolfram Holand, Marcel Schweiger, Volker Rheinberger