Patents by Inventor Wolfram Höland

Wolfram Höland 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).

  • Shaded zirconia ceramics
    Patent number: 8173562
    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: June 13, 2008
    Date of Patent: May 8, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
  • Inorganic-inorganic composite material and method for producing the same
    Publication number: 20120064490
    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: Application
    Filed: September 22, 2011
    Publication date: March 15, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
  • PROCESS FOR THE PREPARATION OF COLOURED BLANKS AND DENTAL SHAPED PARTS
    Publication number: 20110319254
    Abstract: The invention relates to compositions based on ZrO2, and single- and multi-coloured blanks made from oxide ceramics, and a process for their preparation, in which a) oxide ceramic powder is coated with a colouring substance, b) the coated powders are preferably graded and at least one coloured powder is filled into a compression mould, c) the coloured powder or powders are compressed to produce a shaped body, and d) the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations.
    Type: Application
    Filed: September 2, 2011
    Publication date: December 29, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Christian RITZBERGER, Elke APEL, Wolfram HÖLAND, Frank ROTHBRUST, Harald KERSCHBAUMER, Volker M. RHEINBERGER
  • Inorganic-inorganic composite material and method for producing the same
    Patent number: 8080189
    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: January 27, 2005
    Date of Patent: December 20, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
  • Lithium Silicate Materials
    Publication number: 20110259053
    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: July 1, 2011
    Publication date: October 27, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Elke Apel, Wolfram Höland, Marcel Schweiger, Christian van t'Hoen, Harald Bürke, Volker M. Rheinberger
  • Process for the preparation of colored blanks and dental shaped parts
    Patent number: 8034264
    Abstract: The invention relates to compositions based on 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.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: October 11, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Frank Rothbrust, Harald Kerschbaumer, Volker M. Rheinberger
  • PRIMARY PARTICLES COATED WITH A CHROMOPHORIC COMPONENT
    Publication number: 20110215507
    Abstract: The invention relates to suspension of primary particles of oxide-ceramic material, wherein the primary particles have an average particle size in the range from 10 to 1000 nm and are coated with a chromophoric component, a process for their preparation and their use in particular in the preparation of ceramic mouldings and dental restorations. The invention further relates to a process for the preparation of ceramic mouldings.
    Type: Application
    Filed: May 13, 2011
    Publication date: September 8, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Elke APEL, Christian RITZBERGER, Wolfram Höland, Christoph APPERT, Wolfgang WACHTER, Volker M. RHEINBERGER
  • Lithium Silicate Materials
    Publication number: 20110059836
    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: November 11, 2010
    Publication date: March 10, 2011
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Elke Apel, Wolfram Höland, Marcel Schweiger, Christian van t'Hoen, Harald Bürke, Volker M. Rheinberger
  • Coated dental powders
    Patent number: 7901774
    Abstract: The present invention relates to an inorganic dental powder, coated with at least one layer comprising inorganic and/or organic substances or consisting thereof, and to a process for its preparation.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: March 8, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Christian Ritzberger, Norbert Moszner, Harald Kerschbaumer, Volker Rheinberger, Ricardo Dellagiacoma
  • Phosphosilicate Glass Ceramic
    Publication number: 20110021336
    Abstract: A phosphosilicate glass ceramic with nanoscale fluoroapatite and leucite crystals. The glass ceramic is very similar to natural tooth material in terms of its optical properties. The glass ceramic has a low linear thermal expansion coefficient and a low pressing temperature and is therefore particularly suitable for pressing on metal alloys to produce dental restoration.
    Type: Application
    Filed: December 3, 2009
    Publication date: January 27, 2011
    Applicant: Ivoclar Vivadent AG
    Inventors: Urs Bolle, Marcel Schweiger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Dental glass ceramics
    Patent number: 7846857
    Abstract: The invention relates to dental glass-ceramics and a process for producing them and their use, with these comprising at least one crystal phase containing xenotime or monazite or mixtures thereof.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: December 7, 2010
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Christian Ritzberger, Volker Rheinberger, Elke Apel
  • Dental glass
    Patent number: 7795164
    Abstract: The present invention relates to a dental glass containing 50 to 70 wt. % of SiO2, 5 to 18 wt. % of Al2O3, 6.1 to 30 wt. % of MgO, 1 to 15 wt. % of La2O3, 1 to 15 wt. % of WO3, 0.1 to 8 wt. % of ZrO2, and optionally further oxides except for the oxides of Sr, Ba or alkali metals, wherein the stated quantities in total add up to 100 wt. %.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: September 14, 2010
    Assignees: Ivoclar Vivadent AG, Empa Dubendorf
    Inventors: Christian Ritzberger, Volker Rheinberger, Elke Apel, Peter Burtscher, Wolfram Höland, Thomas Graule, Simone Zürcher, Andri Vital
  • Lithium Silicate Materails
    Publication number: 20090291820
    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: July 27, 2009
    Publication date: November 26, 2009
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Marcel Schweiger, Volker M. Rheinberger, Harald Bürke, Wolfram Höland
  • Lithium silicate glass ceramic
    Patent number: 7452836
    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: February 6, 2006
    Date of Patent: November 18, 2008
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Apel, Wolfram Höland, Marcel Schweiger, Christian van t'Hoen, Harald Bürke, Volker M. Rheinberger
  • Lithium silicate materials
    Patent number: 7316740
    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: August 6, 2004
    Date of Patent: January 8, 2008
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker M. Rheinberger, Harald Bürke, Wolfram Höland
  • Translucent and radio-opaque ceramics
    Patent number: 7183232
    Abstract: Radio-opaque glass ceramics are described which have high chemical durability and adjustable translucency, brightness and coefficient of thermal expansion.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: February 27, 2007
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian van't Hoen, Elke Apel, Wolfram Höland, Volker M. Rheinberger
  • Apatite glass ceramic based on siliceous oxyapatites
    Patent number: 7166548
    Abstract: Apatite glass ceramic which contains at least one glass phase and at least one apatite phase and is characterized in that at least one of the apatite phases is a phosphate- and fluorine-free siliceous oxyapatite phase.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: January 23, 2007
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Apel, Wolfram Höland, Christian van't Hoen, Urs Bolle, Volker M. Rheinberger
  • Bioactive rhenanite glass ceramic
    Patent number: 7074730
    Abstract: The invention relates to a bioactive rhenanite glass ceramic which is characterized by a high content of P2O5, CaO and Na2O and is particularly suitable as bone replacement material in dentistry.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: July 11, 2006
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Apel, Wolfram Höland, Volker Rheinberger
  • Low-temperature-sintering potassium-zinc-silicate glass
    Patent number: 6626986
    Abstract: Potassium-zinc-silicate glasses are described which because of their high chemical stability as well as their optical properties and favorable working properties are suitable in particular as coating or veneering materials for ceramic dental suprastructures and thus for the preparation of all-ceramic dental restorations, such as crowns or bridges.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: September 30, 2003
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker Rheinberger, Wolfram Höland
  • Low temperature-sintering apatite glass ceramic
    Patent number: 6620747
    Abstract: A low-temperature-sintering apatite glass ceramic is described which is characterized by a high chemical stability, a low coefficient of expansion as well as high translucency and which is particularly suitable on its own or together with glasses or other glass ceramics as coating or veneering material for ceramic dental restorations.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: September 16, 2003
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker Rheinberger, Wolfram Höland