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).

  • Method for the preparation of lithium silicate glasses and lithium silicate glass ceramics
    Patent number: 10737972
    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: October 10, 2018
    Date of Patent: August 11, 2020
    Assignee: Ivoclar Vivadent AG
    Inventors: Sebastian Krolikowski, Markus Rampf, Christian Ritzberger, Harald Bürke, Wolfram Holand, Marcel Schweiger
  • Process And Slip For The Production Of Ceramic Shaped Bodies Made Of Zirconium Oxide By 3D Inkjet Printing
    Publication number: 20200171699
    Abstract: Process and slip for the production of ceramic shaped parts made of zirconium oxide ceramic by a 3D inkjet printing process. The slip contains zirconium oxide which is suspended in a liquid medium, wherein the slip has a zirconium oxide content of from 68 to 88 wt.-% and contains not more than 5 wt.-% organic components. The process for the production of ceramic components comprises the layered shaping and subsequent sintering of the desired component from the slip.
    Type: Application
    Filed: October 22, 2019
    Publication date: June 4, 2020
    Inventors: Christian Ritzberger, Johannes Renner
  • Process For The Production Of A Dental Restoration
    Publication number: 20200170765
    Abstract: The invention relates to a process for the production of a dental restoration, in which an oxide ceramic material (a) is subjected to a first heat treatment, (b) is subjected to a second heat treatment and (c) is cooled, wherein the heat treatment in step (a) is effected at lower pressure than the heat treatment in step (b).
    Type: Application
    Filed: November 4, 2019
    Publication date: June 4, 2020
    Inventors: Frank Rothbrust, Bo Jiang, Rudolf Jüssel, Christian Ritzberger
  • Slip And Process For The Production Of Ceramic And Glass Ceramic 3D Structures
    Publication number: 20200172444
    Abstract: Slip for the production of ceramic or glass ceramic shaped parts by a LIFT process, which contains (a) ceramic and/or glass ceramic particles, (b) binder, (c) at least one energy transformation component and (d) at least one dispersant, as well as a LIFT process for the production of ceramic or glass ceramic shaped parts using the slip.
    Type: Application
    Filed: October 18, 2019
    Publication date: June 4, 2020
    Inventors: Lorenz Josef Bonderer, Jürgen Rudolf Laubersheimer, Wolfgang Josef Wachter, Christian Ritzberger, Michael Zenou
  • Process For The Preparation Of A Zirconia Blank
    Publication number: 20200170763
    Abstract: The invention relates to a process for the preparation of a zirconia blank by introducing a zirconia suspension into a porous mould and demoulding the blank formed as well as the use of the optionally presintered blank formed for the preparation of a dental restoration using a very short dense-sintering process.
    Type: Application
    Filed: November 5, 2019
    Publication date: June 4, 2020
    Inventors: Bo Jiang, Christian Ritzberger, Frank Rothbrust
  • LITHIUM SILICATE GLASS CERAMIC AND GLASS WITH ZrO2 CONTENT
    Publication number: 20200156989
    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: Application
    Filed: January 21, 2020
    Publication date: May 21, 2020
    Inventors: Christian Ritzberger, Ricardo Dellagiacomo, Marcel Schweiger, Harald Bürke, Wolfram Höland, Volker Rheinberger
  • Lithium silicate glass ceramic with scheelite or powellite crystal phase
    Patent number: 10626045
    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: Grant
    Filed: May 25, 2018
    Date of Patent: April 21, 2020
    Assignee: Ivoclar Vivadent AG
    Inventors: Marc Dittmer, Christian Ritzberger, Markus Rampf
  • Method For Producing A Dental Prosthesis Part
    Publication number: 20200113661
    Abstract: The present invention relates to a method for producing a dental prosthesis part (100), comprising the steps of determining a natural tooth color value with respect to a specified region (101) of the dental prosthesis part (100); and electronically converting the natural tooth color value into a color value of a coloring liquid (103) for coloring the region (101).
    Type: Application
    Filed: October 1, 2019
    Publication date: April 16, 2020
    Inventor: Christian Ritzberger
  • Lithium Silicate-Low Quartz Glass Ceramic
    Publication number: 20200079685
    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: October 18, 2019
    Publication date: March 12, 2020
    Inventors: Christian Ritzberger, Markus Rampf, Wolfram Höland, Marc Dittmer, Marcel Schweiger
  • PROCESS FOR THE PREPARATION OF A GLASS-CERAMIC BLANK FOR DENTAL PURPOSES
    Publication number: 20200069399
    Abstract: The invention relates to a process for the preparation of a glass-ceramic blank for dental purposes with lithium silicate as crystal phase, in which lithium silicate blanks that are no longer required and in particular residues thereof are used as starting material and which allows the production of a homogeneous starting glass within a short time.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Inventor: Christian Ritzberger
  • LITHIUM SILICATE MATERIALS
    Publication number: 20200024181
    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: February 25, 2019
    Publication date: January 23, 2020
    Inventors: Elke Signer-Apel, Wolfram Höland, Marcel Schweiger, Christian Ritzberger, Harald Bürke, Volker Rheinberger
  • Lithium silicate-low quartz glass ceramic
    Patent number: 10501366
    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: Grant
    Filed: August 22, 2016
    Date of Patent: December 10, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Markus Rampf, Wolfram Höland, Marc Dittmer, Marcel Schweiger
  • Method For The Preparation Of Glasses And Glass Ceramics With SiO2 As Main Crystal Phase
    Publication number: 20190352220
    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: July 31, 2019
    Publication date: November 21, 2019
    Inventors: Markus Rampf, Sebastian Krolikowski, Christian Ritzberger, Wolfram Höland, Marcel Schweiger
  • Pre-sintered blank for dental purposes
    Patent number: 10470854
    Abstract: Pre-sintered blanks based on lithium disilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: November 12, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger
  • Lithium silicate diopside glass ceramics
    Patent number: 10457589
    Abstract: Lithium silicate-diopside glass ceramics are described which are characterized by a controllable translucence and can be satisfactorily processed mechanically and therefore can be used in particular as restoration material in dentistry.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 29, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Markus Rampf, Christian Ritzberger, Marc Dittmer, Wolfram Höland, Marcel Schweiger
  • Glass Ceramic Having SiO2 As Main Crystal Phase
    Publication number: 20190315651
    Abstract: Glass ceramics having SiO2 as main crystal phase and precursors thereof are described which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.
    Type: Application
    Filed: June 27, 2019
    Publication date: October 17, 2019
    Inventors: Markus Rampf, Marc Dittmer, Christian Ritzberger, Marcel Schweiger, Wolfram Höland
  • Method for the preparation of glasses and glass ceramics with SiO2 as main crystal phase
    Patent number: 10414688
    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: Grant
    Filed: October 28, 2016
    Date of Patent: September 17, 2019
    Assignee: Ivoclat Vivadent AG
    Inventors: Markus Rampf, Sebastian Krolikowski, Christian Ritzberger, Wolfram Höland, Marcel Schweiger
  • CeO2-Stabilized ZrO2 Ceramics For Dental Applications
    Publication number: 20190248709
    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: April 25, 2019
    Publication date: August 15, 2019
    Inventors: Christian Ritzberger, Frank Rothbrust, Marcel Schweiger, Nicolas Courtois, Jérôme Chevalier, Helen Reveron, Wolfram Höland, Volker Rheinberger
  • Glass ceramic with SiO2 as the main crystalline phase
    Patent number: 10377661
    Abstract: Glass ceramics having SiO2 as main crystal phase and precursors thereof are described which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: August 13, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Markus Rampf, Marc Dittmer, Christian Ritzberger, Marcel Schweiger, Wolfram Höland
  • Lithium silicate glass ceramic and glass with rubidium oxide content
    Patent number: 10376343
    Abstract: The invention relates to the use of lithium silicate glass ceramics and glasses with rubidium oxide content for coating an oxide ceramic, a metal or an alloy.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 13, 2019
    Assignee: Ivoclar Vivadent AG
    Inventors: Volker Rheinberger, Markus Rampf, Marc Dittmer, Christian Ritzberger, Wolfram Höland, Marcel Schweiger