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 glass with divalent metal oxide
    Patent number: 10358380
    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: Grant
    Filed: September 5, 2017
    Date of Patent: July 23, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Signer-Apel, Wolfram Höland, Volker Rheinberger
  • Lithium silicate glass ceramic and glass with trivalent metal oxide
    Patent number: 10321980
    Abstract: Lithium silicate glass ceramics and glasses comprising specific oxides of trivalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: June 18, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • ZIRCONIA-TOUGHENED GLASS CERAMICS
    Publication number: 20190177210
    Abstract: ZrO2-toughened glass ceramics having high molar fractions of tetragonal ZrO2 and fracture toughness value of greater than 2 MPa·m1/2. The glass ceramic may also include also contain other secondary phases that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.
    Type: Application
    Filed: June 26, 2017
    Publication date: June 13, 2019
    Inventors: George Halsey Beall, Marc Dittmer, Qiang Fu, Wolfram Holand, Markus Rampf, Christian Ritzberger, Charlene Marie Smith
  • CeO-stabilized ZrOceramics for dental applications
    Patent number: 10315958
    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 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: Grant
    Filed: June 20, 2013
    Date of Patent: June 11, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Frank Rothbrust, Marcel Schweiger, Nicolas Courtois, Jérôme Chevalier, Helen Reveron, Wolfram Höland, Volker Rheinberger
  • CONTROLLING OF SINTERING KINETICS OF OXIDE CERAMICS
    Publication number: 20190099245
    Abstract: The invention relates to multi-layer oxide ceramic bodies and in particular to presintered multi-layer oxide ceramic blanks and oxide ceramic green bodies suitable for dental applications. These bodies can be thermally densified by further sintering without distortion and are thus particularly suitable for the manufacture of dental restorations. The invention also relates to a process for the manufacture of such multi-layer oxide ceramic bodies as well as to a process for the manufacture of dental restorations using the multi-layer oxide ceramic bodies.
    Type: Application
    Filed: October 23, 2018
    Publication date: April 4, 2019
    Inventors: Frank Rothbrust, Christian Ritzberger, Dmitri Brodkin, Ajmal Khan, Marcel Schweiger
  • LITHIUM SILICATE MATERIALS
    Publication number: 20190090996
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Inventors: Marcel Schweiger, Volker Rheinberger, Harald Bürke, Wolfram Höland, Elke Signer-Apel, Christian Ritzberger, Dmitri Brodkin
  • Lithium silicate glass ceramic and lithium silicate glass comprising a pentavalent metal oxide
    Patent number: 10227255
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of pentavalent 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: March 12, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Lithium silicate materials
    Patent number: 10214443
    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: September 2, 2016
    Date of Patent: February 26, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Signer-Apel, Wolfram Höland, Marcel Schweiger, Christian Ritzberger, Harald Bürke, Volker Rheinberger
  • Pre-sintered blank for dental purposes
    Patent number: 10206761
    Abstract: Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: February 19, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger, Diana Tauch
  • Lithium Silicate Glass Ceramic With Scheelite Or Powellite Crystal Phase
    Publication number: 20190047905
    Abstract: The invention relates to a lithium silicate glass ceramic which contains lithium silicate as main crystal phase and scheelite and/or powellite as further crystal phases. The invention also relates to a corresponding starting glass, a starting glass with nuclei, a process for producing the glass ceramic and the starting glasses as well as the use thereof.
    Type: Application
    Filed: May 25, 2018
    Publication date: February 14, 2019
    Inventors: Marc Dittmer, Christian Ritzberger, Markus Rampf
  • METHOD FOR THE PREPARATION OF LITHIUM SILICATE GLASSES AND LITHIUM SILICATE GLASS CERAMICS
    Publication number: 20190039944
    Abstract: The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.
    Type: Application
    Filed: October 10, 2018
    Publication date: February 7, 2019
    Inventors: Sebastian Krolikowski, Markus Rampf, Christian Ritzberger, Harald Bürke, Wolfram Holand, Marcel Schweiger
  • Lithium silicate glass ceramic and glass with tetravalent metal oxide
    Patent number: 10160687
    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: Grant
    Filed: January 11, 2017
    Date of Patent: December 25, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Signer-Apel, Wolfram Höland, Volker Rheinberger
  • Lithium silicate materials
    Patent number: 10136973
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: November 27, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker Rheinberger, Harald Bürke, Wolfram Höland, Elke Signer-Apel, Christian Ritzberger, Dmitri Brodkin
  • Method for the preparation of lithium silicate glasses and lithium silicate glass ceramics
    Patent number: 10131569
    Abstract: The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 20, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Sebastian Krolikowski, Markus Rampf, Christian Ritzberger, Harald Bürke, Wolfram Höland, Marcel Schweiger
  • Lithium silicate glass ceramic and glass with hexavalent metal oxide
    Patent number: 10098716
    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: Grant
    Filed: June 28, 2016
    Date of Patent: October 16, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Method For The Preparation Of Glasses And Glass Ceramics With SiO2 As Main Crystal Phase
    Publication number: 20180282204
    Abstract: The invention relates to a method for the preparation of a glass ceramic or a glass, which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a glass ceramic and a glass which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.
    Type: Application
    Filed: October 28, 2016
    Publication date: October 4, 2018
    Inventors: Markus Rampf, Sebastian Krolikowski, Christian Ritzberger, Wolfram Holand, Marcel Schweiger
  • Blank for dental purposes
    Patent number: 10064708
    Abstract: Blanks for dental purposes are described which have at least two layers, bonded to one another, of lithium silicate glasses and glass ceramics, wherein the layers differ in color and the layers are monolithic.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: September 4, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Harald Bürke, Diana Tauch, Marcel Schweiger, Wolfram Höland, Christian Ritzberger, Volker Rheinberger
  • Lithium Silicate- Low Quartz Glass Ceramic
    Publication number: 20180244564
    Abstract: Lithium silicate-low quartz glass ceramics are described which are characterized by a combination of very good mechanical and optical properties and can therefore be used in particular as restoration material in dentistry.
    Type: Application
    Filed: August 22, 2015
    Publication date: August 30, 2018
    Inventors: Christian Ritzberger, Markus Rampf, Wolfram Höland, Marc Dittmer, Marcel Schweiger
  • Process for the preparation of dental restorations
    Patent number: 9956146
    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: March 29, 2016
    Date of Patent: May 1, 2018
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
  • LITHIUM SILICATE GLASS CERAMIC AND LITHIUM SILICATE GLASS COMPRISING A PENTAVALENT METAL OXIDE
    Publication number: 20180099899
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of pentavalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 12, 2018
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger