Patents by Inventor Frank Rothbrust
Frank Rothbrust 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).
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Publication number: 20160195334Abstract: The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 50° K/min, in particular more than 100° K/min, which heats the furnace to at least 1000° C., in particular to 1100-1250° C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (10), and wherein this is followed by an end heating-up period (44) during which heating up is effected at a heating-up rate of more than 30° K/min, in particular approximately 50° K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace (10) is performed after this.Type: ApplicationFiled: January 13, 2016Publication date: July 7, 2016Inventors: Gottfried Rohner, Walter Pokorny, Robert Grunenfelder, Frank Rothbrust
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Publication number: 20160157971Abstract: 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: ApplicationFiled: July 21, 2014Publication date: June 9, 2016Inventors: Frank ROTHBRUST, Christian RITZBERGER, Dmitri BRODKIN, Ajmal KHAN, Marcel SCHWEIGER
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Publication number: 20150219397Abstract: The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 501 K/min, in particular more than 1001 K/min, which heats the furnace to at least 10001 C, in particular to 1100-12501 C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (10), and wherein this is followed by an end heating-up period (44) during which heating up is effected at a heating-up rate of more than 301 K/min, in particular approximately 501 K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace (10) is performed after this.Type: ApplicationFiled: April 13, 2015Publication date: August 6, 2015Inventors: Gottfried Rohner, Walter Pokorny, Robert Grunenfelder, Frank Rothbrust
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Patent number: 9090511Abstract: 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: GrantFiled: September 22, 2011Date of Patent: July 28, 2015Assignee: Ivoclar Vivadent AGInventors: Frank Rothbrust, Christian Ritzberger, Volker Rheinberger, Wolfram Höland
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Publication number: 20150191397Abstract: 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: ApplicationFiled: June 20, 2013Publication date: July 9, 2015Inventors: Christian Ritzberger, Frank Rothbrust, Marcel Schweiger, Nicolas Courtois, Jérôme Chevalier, Helen Reveron, Wolfram Höland, Volker Rheinberger
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Patent number: 9033703Abstract: The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 50° K/min, in particular more than 100° K/min, which heats the furnace to at least 1000° C., in particular to 1100-1250° C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (10), and wherein this is followed by an end heating-up period (44) during which heating up is effected at a heating-up rate of more than 30° K/min, in particular approximately 50° K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace (10) is performed after this.Type: GrantFiled: March 5, 2009Date of Patent: May 19, 2015Assignee: Ivoclar Vivadent AGInventors: Gottfried Rohner, Walter Pokorny, Robert Grünenfelder, Frank Rothbrust
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Publication number: 20150035210Abstract: 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: ApplicationFiled: October 16, 2014Publication date: February 5, 2015Inventors: Wolfram Holand, Elke Signer-Apel, Christian Ritzberger, Frank Rothbrust, Heinrich Kappert, Volker Rheinberger, Jerome Chevalier, Helen Reveron, Nicolas Courtois, Ricardo Dellagiacomo
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Patent number: 8889576Abstract: 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: GrantFiled: April 13, 2011Date of Patent: November 18, 2014Assignee: Ivoclar Vivadent AGInventors: Wolfram Höland, Elke Apel, Christian Ritzberger, Frank Rothbrust, Heinrich Kappert, Volker Rheinberger, Jérôme Chevalier, Helen Reveron, Nicolas Courtois, Ricardo Dellagiacomo
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Patent number: 8796166Abstract: 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: GrantFiled: April 4, 2012Date of Patent: August 5, 2014Assignee: Ivoclar Vivadent AGInventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jérôme Chevalier, Dmitri Brodkin
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Patent number: 8541329Abstract: 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: GrantFiled: September 2, 2011Date of Patent: September 24, 2013Assignee: Ivoclar Vivadent AGInventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Frank Rothbrust, Harald Kerschbaumer, Volker Rheinberger
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Publication number: 20120196737Abstract: 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: ApplicationFiled: April 4, 2012Publication date: August 2, 2012Applicant: IVOCLAR VIVADENT AGInventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
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Patent number: 8173562Abstract: 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: GrantFiled: June 13, 2008Date of Patent: May 8, 2012Assignee: Ivoclar Vivadent AGInventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
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Publication number: 20120064490Abstract: 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: ApplicationFiled: September 22, 2011Publication date: March 15, 2012Applicant: IVOCLAR VIVADENT AGInventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
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Publication number: 20110319254Abstract: 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: ApplicationFiled: September 2, 2011Publication date: December 29, 2011Applicant: IVOCLAR VIVADENT AGInventors: Christian RITZBERGER, Elke APEL, Wolfram HÖLAND, Frank ROTHBRUST, Harald KERSCHBAUMER, Volker M. RHEINBERGER
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Patent number: 8080189Abstract: 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: GrantFiled: January 27, 2005Date of Patent: December 20, 2011Assignee: Ivoclar Vivadent AGInventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
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Publication number: 20110254181Abstract: 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: ApplicationFiled: April 13, 2011Publication date: October 20, 2011Applicant: IVOCLAR VIVADENT AGInventors: Wolfram Holand, Elke Apel, Christian Ritzberger, Frank Rothbrust, Heinrich Kappert, Volker Rheinberger, Jerome Chevalier, Helen Reveron, Nicolas Courtois, Ricardo Dellagiacomo
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Patent number: 8034264Abstract: 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: GrantFiled: May 18, 2007Date of Patent: October 11, 2011Assignee: Ivoclar Vivadent AGInventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Frank Rothbrust, Harald Kerschbaumer, Volker M. Rheinberger
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Publication number: 20090226855Abstract: The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 50° K/min, in particular more than 100° K/min, which heats the furnace to at least 1000° C., in particular to 1100-1250° C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (10), and wherein this is followed by an end heating-up period (44) during which heating up is effected at a heating-up rate of more than 30° K/min, in particular approximately 50° K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace (10) is performed after this.Type: ApplicationFiled: March 5, 2009Publication date: September 10, 2009Inventors: Gottfried Rohner, Walter Pokorny, Robert Grunenfelder, Frank Rothbrust
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Publication number: 20080303181Abstract: 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: ApplicationFiled: June 13, 2008Publication date: December 11, 2008Applicant: Ivoclar Vivadent AGInventors: Wolfram Holand, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
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Publication number: 20080118894Abstract: 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: ApplicationFiled: January 27, 2005Publication date: May 22, 2008Inventors: Frank Rothbrust, Christian Ritzberger, Wolfram Holand, Volker Rheinberger