Patents Assigned to Ivoclar AG
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Patent number: 6794520Abstract: Methylene dithiepane silanes according to Formula I in which R1 is a saturated or unsaturated aliphatic or alicyclic hydrocarbon radical with 1 to 10 carbon atoms, which can be interrupted by one or more oxygen and/or sulphur atoms and can contain one or more ester, carbonyl, amide and/or urethane groups, or is an aromatic or heteroaromatic hydrocarbon radical with 6 to 18 carbon atoms, the hydrocarbon radicals being able to be substituted or unsubstituted; R2 has one of the meanings given for R1 or is absent; R3 has one of the meanings given for R1 or is absent; R4 is equal to —(CHR6)n—, —Y—CO—NH—(CHR6)n—, —Y—CO—NH—R5—, —(CHR6)n—S—R5—, —S—R5—, —CO—O—R5— or is absent, with n being equal to 1 to 4, R6 is hydrogen, C1 to C10 alkyl or C6 to C10 aryl, R5 has one of the meanings given for R1 and Y stands for an O or S atom or is absent; with R5 and R6 being ablType: GrantFiled: September 7, 2000Date of Patent: September 21, 2004Assignee: Ivoclar AGInventors: Norbert Moszner, Sabine Stein, Thomas Völkel, Volker Rheinberger
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Patent number: 6713555Abstract: Methylene dithiepane silanes according to Formula I in which R1 is a saturated or unsaturated aliphatic or alicyclic hydrocarbon radical with 1 to 10 carbon atoms, which can be interrupted by one or more oxygen and/or sulphur atoms and can contain one or more ester, carbonyl, amide and/or urethane groups, or is an aromatic or heteroaromatic hydrocarbon radical with 6 to 18 carbon atoms, the hydrocarbon radicals being able to be substituted or unsubstituted; R2 has one of the meanings given for R1 or is absent; R3 has one of the meanings given for R1 or is absent; R4 is equal to —(CHR6)n—, —Y—CO—NH—(CHR6)n—, —Y—CO—NH—R5—, —(CHR6)n—S—R5—, —S—R5—, —CO—O—R5— or is absent, with n being equal to 1 to 4, R6 is hydrogen, C1 to C10 alkyl or C6 to C10 aryl, R5 has one of the meanings given for R1 and Y stands for an O or S atom or is absent; with R5 and R6 being ablType: GrantFiled: September 27, 2002Date of Patent: March 30, 2004Assignee: Ivoclar AGInventors: Norbert Moszner, Sabine Stein, Thomas Völkel, Volker Rheinberger
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Patent number: 6653375Abstract: The invention relates to urethane di(meth)acrylate derivatives of 1-3-bis(1-isocyanato-1-methylethyl)benzene according to Formula (I) in which R is hydrogen or a straight-chained C1-C8 alkyl radical; X and Y independently of each other stand for R1 being a substituted or unsubstituted C6- to C12-aryl or C7- to C16-alkyl aryl radical; R2 hydrogen, a C1- to C5-alkyl or a substituted or unsubstituted C6- to C12-aryl radical; R3 hydrogen or a methyl radical; R4 a C1- to C8-alkylene radical which can be broken by oxygen atoms, or a phenylene radical; R5 hydrogen or a methyl radical; R6 a substituted or unsubstituted C6- to C12-aryl or C7- to C16-alkyl aryl radical; Z being —CO— or a chemical bond and W standing for oxygen, sulphur or NR7, R7 being hydrogen or a straight-chained C1- to C6-alkyl radical. The substances are suitable in particular for the production of dental materials.Type: GrantFiled: January 25, 1999Date of Patent: November 25, 2003Assignee: Ivoclar AGInventors: Norbert Moszner, Volker Rheinberger, Thomas Völkel, Urs Karl Fischer
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Patent number: 6613439Abstract: An adhesion-promoting composition for bonds between plastic and other materials, such as metal, ceramic, glass ceramic and glass is described, which contains an alcoholate of titanium, of zirconium or of hafnium and allows production of strongly adhesive, moisture-stable and hydrolysis-resistant bonds.Type: GrantFiled: January 22, 1998Date of Patent: September 2, 2003Assignee: Ivoclar AGInventor: Roland Goebel
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Patent number: 6606884Abstract: High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.Type: GrantFiled: October 22, 2001Date of Patent: August 19, 2003Assignee: Ivoclar AGInventors: Marcel Schweiger, Martin Frank, Volker Rheinberger, Wolfram Hoeland
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Patent number: 6569917Abstract: The invention relates to dental materials which contain at least one polysiloxane based on one or several silanes according to formula (I) [(Wq—R6—Z)p—R3]mY—R2—SiXnR13−n Formula (I) in which X stands for a halogen atom, a hydroxyl, alkoxy and/or acyloxy group; n is equal to 1 to 3, R1 stands for an alkyl, alkenyl, aryl, alkylaryl, arylalkyl group; R2 stands for an alkylene group; R3 stands for a p-time substituted, straight, branched or cyclic, saturated or unsaturated, aromatic or aliphatic organic radical with 2 to 40 carbon atoms and optionally 1 to 6 heteroatoms; R6 stands for a q-times substituted, straight, branched or cyclic organic radical with 1 to 20 carbon atoms or is absent; p is equal to 1 to 6; q is equal to 1 to 6; Y stands for —NR4—, N or —(C═O)—NH—; m is equal to 2 for Y═N and equal to 1 for Y═—NR4—, or —(C═O)—NH—; R4 stands for an alkyl or aryl group; Z sType: GrantFiled: January 20, 2000Date of Patent: May 27, 2003Assignee: Ivoclar AGInventors: Norbert Moszner, Thomas Völkel, Sabine Stein, Volkner Rheinberger
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Patent number: 6524103Abstract: A cartridge for receiving and dispensing a paste has a cartridge body having a front end with a lateral outlet opening for dispensing the paste material. The cartridge body has a longitudinal center axis and the outlet opening has a central axis inclined forwardly relatively to the longitudinal center axis. The outlet opening has a width measured in the direction perpendicular to the longitudinal center axis and an axial length measured in the direction of the longitudinal center axis. The width and the length are different, and the width is preferably greater than the axial length.Type: GrantFiled: September 22, 2000Date of Patent: February 25, 2003Assignee: Ivoclar AGInventors: Siegbert Winkler, Peter Kunkel, Franz Hohenegger
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Patent number: 6514893Abstract: High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.Type: GrantFiled: October 19, 1999Date of Patent: February 4, 2003Assignee: Ivoclar AGInventors: Marcel Schweiger, Martin Frank, Volker Rheinberger, Wolfram Hoeland
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Patent number: 6482004Abstract: A light curing device has a light source for curing light-polymerizable dental materials. A control circuit controls the light output of the light source according to a pre-determined output profile. The output profile has a starting time period with a decreased output relative to a maximum output, followed by a main curing time period. In the main curing time period, a pulsed output with alternating high output value and low output value is provided.Type: GrantFiled: March 24, 2000Date of Patent: November 19, 2002Assignee: Ivoclar AGInventors: Bruno Senn, Gottfried Rohner, Peter Burtscher
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Patent number: 6450717Abstract: An applicator kit, for dental purposes. has an application element with a grip area for handling, and also has a shaft, on a tip of which is disposed an application member, preferably in the form of a micro-brush that is provided with a reaction substance. A cup shaped sealing mechanism surrounds the shaft and the application member. The cup shaped sealing mechanism is slidably received within a housing which also receives a low velocity fluid initially spaced away from the cup-shaped sealing mechanism. The reaction substance on the application member is activated by pressing the sealing mechanism and application member into the fluid within the housing which causes the fluid to wet the application member.Type: GrantFiled: October 24, 2000Date of Patent: September 17, 2002Assignee: Ivoclar AG.Inventors: Ulrich Salz, Andre Rumphorst, Alexandros Gianasmidis, Frank Muller, Volker Rheinberger
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Patent number: 6420288Abstract: A process is described for the preparation of shaped translucent lithium disilicate glass ceramic products which are characterized by high strength and good chemical stability and may be processed by pressing in the plastic state or milling to finished glass ceramic products which may be used in particular as dental restorations.Type: GrantFiled: November 6, 1998Date of Patent: July 16, 2002Assignee: Ivoclar AGInventors: Marcel Schweiger, Sascha Cramer von Clausbruch, Wolfram Höland, Volker Rheinberger
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Patent number: 6394803Abstract: A mixing arrangement and method for mixing a substance for the field of dentistry are provided, with the production of the substance requiring at least one base material and one reactant. A catalyst is applied to a base surface as reactant in a solid or semi-solid layer. The unit comprising catalyst and base is prefabricated, and the base material, particularly in liquid form, can be applied or introduced to the base surface that is provided with the catalyst prior to using the substance. The substance can be applied ready for use by means of an application element after the catalyst and base material have been mixed.Type: GrantFiled: October 24, 2000Date of Patent: May 28, 2002Assignee: Ivoclar AGInventors: Ulrich Salz, Andre Rumphorst, Alexandros Gianasmidis, Frank Muller, Volker Rheinberger
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Patent number: 6384382Abstract: An oven particularly suitable for dental materials is provided with a firing plate on which a calibration apparatus can be removably located. The calibration apparatus includes a meltable element whose melting is detectable by a detecting device. The calibration apparatus is additionally provided with a control device. The firing plate includes a device for receiving therein the calibration apparatus including a non-electrically conducting support for supporting two electrically conducting contact posts of the calibration apparatus.Type: GrantFiled: January 3, 2001Date of Patent: May 7, 2002Assignee: Ivoclar AGInventors: Gottfried Rohner, Johannes Lorunser, Horst Ulbricht
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Patent number: 6382967Abstract: A dental apparatus has a display and an actuating device for selecting and activating operating programs for operating the dental apparatus. The display has a tooth schematic that is divided into indicator fields. The indicator fields may be distributed over a plurality of teeth so that each indicator field represents one tooth or may be used to indicate certain locations of an individual tooth.Type: GrantFiled: May 16, 2000Date of Patent: May 7, 2002Assignee: Ivoclar AG.Inventors: Gottfried Rohner, Bruno Senn
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Patent number: 6371762Abstract: A ceramic tooth restoration has two neighboring ceramic tooth replacement elements each having a recess. A connecting member is placed into the recesses. A glass paste is provided for anchoring the connecting member in the recesses by sintering at a temperature below approximately 800° C.Type: GrantFiled: November 15, 1999Date of Patent: April 16, 2002Assignee: Ivoclar AGInventor: Hans-Peter Foser
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Patent number: 6353039Abstract: A composite material is described which contains polymerizable monomers plus a special transparent glass having high release of calcium ions and fluorine ions and, because of this release property and in particular of its optical properties, can be used as a restoration material in dentistry.Type: GrantFiled: December 11, 1998Date of Patent: March 5, 2002Assignee: Ivoclar AGInventors: Volker Rheinberger, Ulrich Salz, Wolfram Höland, André Rumphorst, Kurt Grabher, Urs Karl Fischer, Marcel Schweiger, Norbert Moszner
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Patent number: 6342458Abstract: High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.Type: GrantFiled: August 23, 1999Date of Patent: January 29, 2002Assignee: Ivoclar AGInventors: Marcel Schweiger, Martin Frank, Volker Rheinberger, Wolfram Hoeland
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Patent number: 6322358Abstract: A cutting device for light-induced curing of dental materials includes a hand-held apparatus containing a light source whereby the hand-held apparatus is pistol-shaped and comprises a main body and a grip connected to the main body. A cable connects the grip of the hand-held apparatus to a supply station. A support for receiving the hand-held apparatus is provided. The support is detachably connected to the supply station or a stand such that the support in which the hand-held apparatus is received is storable at the supply station or separate from the supply station.Type: GrantFiled: March 1, 1999Date of Patent: November 27, 2001Assignee: Ivoclar AGInventors: Bruno Senn, Gregor Fritsche, Gottfried Rohner
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Patent number: 6306784Abstract: Alkali silicate glasses are described which, in view of their good chemical stability and their optical properties and processing properties, are particularly suitable as a coating or veneering material for ceramic dental frameworks and hence for the production of all-ceramic dental restorations such as crowns or bridges.Type: GrantFiled: June 9, 2000Date of Patent: October 23, 2001Assignee: Ivoclar AGInventors: Helga Drescher, Martin Frank, Volker Rheinberger, Wolfram Höland
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Patent number: 6287490Abstract: A method for manufacturing a fiber rein-forced composite dental restoration comprising the steps of (i) preparing a mould; (ii) filling the cavity of the mould with a fiber-reinforced polymerizable material comprising an organic matrix and a fiber component embedded within the matrix; (iii) applying pressure to the fiber-reinforced polymerizable material; and (iv) curing the fiber-reinforced polymerizable material. The method is characterized in that the mould is designed in a way which allows excess organic matrix material to escape form the cavity during pressing.Type: GrantFiled: April 17, 1998Date of Patent: September 11, 2001Assignee: Ivoclar AGInventors: Volker Rheinberger, Gerhard Zanghellini