Patents by Inventor Robert Liska
Robert Liska 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).
-
Patent number: 9796138Abstract: A method and a device for processing a light-polymerizable material (5, 55) for building up an object (27) in layers, using a lithography based generative manufacture having a construction platform (12) for building up the object (27), a projecting exposure unit (10, 60) that can be controlled for locally selected exposing of a surface on the construction platform (12, 62) to an intensity pattern having a prescribed shape, and a control unit (11, 61) prepared for polymerizing overlapping layers (28) on the construction platform (12, 62) in successive exposure steps, each having a prescribed geometry, by controlling the projecting exposure unit (10, 60), in order to thus successively build up the object (27) in the desired shape, said shape resulting from the sequence of layer geometries.Type: GrantFiled: April 17, 2014Date of Patent: October 24, 2017Assignees: Ivoclar Vivadent AG, Technische Universitat WienInventors: Robert Liska, Johannes Patzer, Jurgen Stampfl, Wolfgang Wachter, Christoph Appert
-
Publication number: 20170172855Abstract: Radically polymerizable dental material, which contains at least one compound of Formula I: The material preferably additionally contains a radically polymerizable monomer, an initiator for the radical polymerization and filler. It is characterized by a low polymerization contraction stress.Type: ApplicationFiled: July 9, 2015Publication date: June 22, 2017Inventors: Norbert Moszner, Urs-Karl Fischer, Iris Lamparth, Peter Burtscher, Robert Liska, Christian Gorsche, Konstanze Seidler, Paul Gauss
-
Publication number: 20170156993Abstract: Radically polymerizable dental material, which contains at least one compound of Formula I: and at least one thermolabile radically polymerizable compound and/or at least one photolabile radically polymerizable compound. The materials are characterized by debonding-on-demand properties.Type: ApplicationFiled: July 9, 2015Publication date: June 8, 2017Inventors: Norbert Moszner, Kai Rist, Iris Lamparth, Peter Burtscher, Christian Gorsche, Robert Liska
-
Patent number: 9668946Abstract: The invention relates to a dental restorative material which comprises a thermolabile or photolabile polymerizable compound of Formula I: [(Z1)m-Q1-X)]k-T-[Y-Q2-(Z2)n]l??Formula I, in which T represents a thermolabile or photolabile group, Z1 and Z2 in each case independently represent a polymerizable group selected from vinyl groups, CH2?CR1—CO—O— and CH2?CR1—CO—NR2— or an adhesive group selected from —Si(OR)3, —COOH, —O—PO(OH)2, —PO(OH)2, —SO2OH and —SH, wherein at least one Z1 or Z2 is a polymerizable group, Q1 in each case independently is missing or represents an (m+1)-valent linear or branched aliphatic C1-C20 radical which can be interrupted by —O—, —S—, —CO—O—, —O—CO—, —CO—NR3—, —NR3—CO—, —O—CO—NR3—, —NR3—CO—O— or —NR3—CO—NR3—, Q2 in each case independently is missing or represents an (n+1)-valent linear or branched aliphatic C1-C20 radical which can be interrupted by —O—, —S—, —CO—O—, —O—CO—, —CO—NR3—, —NR3—CO—, —O—CO—NR3—, —NR3—CO—O— or —NR3—CO—NR3—, X and Y in each case independently are missingType: GrantFiled: September 10, 2012Date of Patent: June 6, 2017Assignee: Ivoclar Vivadent AGInventors: Norbert Moszner, Iris Lamparth, Thorsten Bock, Urs Karl Fischer, Ulrich Salz, Volker Rheinberger, Robert Liska
-
Patent number: 9623145Abstract: The present disclosure is directed, in part, to a curable composition, a method for augmenting a structure in a patient with a resorbable biocompatible polymer, and a biodegradable, resorbable implant comprising a biocompatible copolymer. An exemplary embodiment of the curable composition comprises (a) 60 wt. % to 95 wt. % of one or more vinyl ester monomers and/or vinylcarbonate monomers, wherein said one or more vinyl ester monomers and/or vinylcarbonate monomers are respectively selected from compounds of the general formulas (I) and (II) below: wherein n, m R1 and R2 have the meaning defined herein; (b) 0.1 to 40 wt. % of one or more multifunctional thiols; and (c) 0 to 10 wt. % of a biocompatible polymerization initiator.Type: GrantFiled: September 26, 2012Date of Patent: April 18, 2017Assignees: DePuy Synthes Products, Inc., Technische Universitaet WienInventors: Robert Liska, Xiaohua Qin, Andreas Mautner
-
Publication number: 20160243279Abstract: The present disclosure is directed, in part, to a curable composition, a method for augmenting a structure in a patient with a resorbable biocompatible polymer, and a biodegradable, resorbable implant comprising a biocompatible copolymer. An exemplary embodiment of the curable composition comprises (a) 60 wt. % to 95 wt. % of one or more vinyl ester monomers and/or vinylcarbonate monomers, wherein said one or more vinyl ester monomers and/or vinylcarbonate monomers are respectively selected from compounds of the general formulas (I) and (II) below: wherein n, m R1 and R2 have the meaning defined herein; (b) 0.1 to 40 wt. % of one or more multifunctional thiols; and (c) 0 to 10 wt. % of a biocompatible polymerization initiator.Type: ApplicationFiled: May 5, 2016Publication date: August 25, 2016Inventors: Robert LISKA, Xiaohua QIN, Andreas MAUTNER
-
Patent number: 8999323Abstract: The present invention relates to a polymerization-curable composition for the preparation of biodegradable, biocompatible, cross-linked polymers on the basis of polyvinyl alcohol comprising: 5 to 100% by weight of (a) vinyl ester monomer(s) of one of the general formulas (I) to (III): wherein X is oxygen, sulfur, nitrogen, or phosphorus; n is 1 to 1000, at least 20% of the n being ?2; the R1 are selected from hydrogen; straight, branched or cyclic, saturated or unsaturated, n-valent hydrocarbon groups having 1 to 30 carbon atoms, which optionally have heteroatoms and are optionally substituted with one or more substituents selected from —OH, —COON, —CN, —CHO, and ?O, and n-valent radicals of biodegradable, biocompatible oligomers and polymers; m is an integer from 1 to 5; the R2 are selected from hydrogen, —OH, ?O, and the options listed for R1; and the R3 are selected from hydrogen, —OH, and the options listed for R1; 0 to 50% by weight of ethylenically unsaturated co-monomers; 0 to 10% by weight of (a)Type: GrantFiled: November 21, 2008Date of Patent: April 7, 2015Assignee: Technische Universität WienInventors: Robert Liska, Jürgen Stampfl, Franz Varga, Heinrich Gruber, Stefan Baudis, Christian Heller, Monika Schuster, Helga Bergmeister, Günter Weigel, Claudia Dworak
-
Publication number: 20140329929Abstract: The invention relates to a dental restorative material which comprises a thermolabile or photolabile polymerizable compound of Formula I: [(Z1)m-Q1-X)]k-T-[Y-Q2-(Z2)n]1??Formula I, in which T represents a thermolabile or photolabile group, Z1 and Z2 in each case independently represent a polymerizable group selected from vinyl groups, CH2?CR1—CO—O— and CH2?CR1—CO—NR2— or an adhesive group selected from —Si(OR)3, —COOH, —O—PO(OH)2, —PO(OH)2, —SO2OH and —SH, wherein at least one Z1 or Z2 is a polymerizable group, Q1 in each case independently is missing or represents an (m+1)-valent linear or branched aliphatic C1-C20 radical which can be interrupted by —O—, —S—, —CO—O—, —O—CO—, —CO—NR3—, —NR3—CO—, —O—CO—NR3—, —NR3—CO—O— or —NR3—CO—NR3—, Q2 in each case independently is missing or represents an (n+1)-valent linear or branched aliphatic C1-C20 radical which can be interrupted by —O—, —S—, —CO—O—, —O—CO—, —CO—NR3—, —NR3—CO—, —O—CO—NR3—, —NR3—CO—O— or —NR3—CO—NR3—, X and Y in each case independently are missingType: ApplicationFiled: September 10, 2012Publication date: November 6, 2014Applicant: IVOCLAR VIVADENT AGInventors: Norbert Moszner, Iris Lamparth, Thorsten Bock, Urs Karl Fischer, Ulrich Salz, Volker Rheinberger, Robert Liska
-
Patent number: 8829067Abstract: Composition with at least one polymerizable binder and one polymerization initiator, which contains at least one acylgermanium compound according to general Formula (I), and the use of acylgermanes of Formula (I) as initiators for radical polymerization or for the preparation of dental restorations.Type: GrantFiled: November 21, 2008Date of Patent: September 9, 2014Assignee: Ivoclar Vivadent AGInventors: Norbert Moszner, Frank Zeuner, Robert Liska, Volker M. Rheinberger, Iris Lamparth, Urs Karl Fischer
-
Publication number: 20140227382Abstract: A method and a device for processing a light-polymerizable material (5, 55) for building up an object (27) in layers, using a lithography based generative manufacture having a construction platform (12) for building up the object (27), a projecting exposure unit (10, 60) that can be controlled for locally selected exposing of a surface on the construction platform (12, 62) to an intensity pattern having a prescribed shape, and a control unit (11, 61) prepared for polymerizing overlapping layers (28) on the construction platform (12, 62) in successive exposure steps, each having a prescribed geometry, by controlling the projecting exposure unit (10, 60), in order to thus successively build up the object (27) in the desired shape, said shape resulting from the sequence of layer geometries.Type: ApplicationFiled: April 17, 2014Publication date: August 14, 2014Applicants: Ivoclar Vivadent AG, Technische Universitat WienInventors: Robert LISKA, Johannes PATZER, Jurgen STAMPFL, Wolfgang WACHTER, Christoph APPERT
-
Patent number: 8741203Abstract: A method and a device for processing a light-polymerizable material (5, 55) for building up an object (27) in layers, using a lithography based generative manufacture having a construction platform (12) for building up the object (27), a projecting exposure unit (10, 60) that can be controlled for locally selected exposing of a surface on the construction platform (12, 62) to an intensity pattern having a prescribed shape, and a control unit (11, 61) prepared for polymerizing overlapping layers (28) on the construction platform (12, 62) in successive exposure steps, each having a prescribed geometry, by controlling the projecting exposure unit (10, 60), in order to thus successively build up the object (27) in the desired shape, said shape resulting from the sequence of layer geometries.Type: GrantFiled: October 20, 2008Date of Patent: June 3, 2014Assignees: Ivoclar Vivadent AG, Technische Universitāt WienInventors: Robert Liska, Johannes Patzer, Jürgen Stampfl, Wolfgang Wachter, Christoph Appert
-
Patent number: 8557888Abstract: Composition which contains polymerizable binder and an initiator according to the following Formula I: R1—X—O—O—[Y—O—O—]nR2??(Formula I) and having a large through-curing depth and a sufficiently long processing time and which cures without the development of high temperatures.Type: GrantFiled: November 14, 2011Date of Patent: October 15, 2013Assignee: Ivoclar Vivadent AGInventors: Norbert Moszner, Ulrich Salz, Peter Burtscher, Robert Liska, Astrid Gugg, Christian Gorsche
-
Publication number: 20120302657Abstract: Composition which contains polymerizable binder and an initiator according to the following Formula I: R1—X—O—O—[Y—O—O—-]nR2??(Formula I) and having a large through-curing depth and a sufficiently long processing time and which cures without the development of high temperatures.Type: ApplicationFiled: November 14, 2011Publication date: November 29, 2012Applicant: IVOCLAR VIVADENT AGInventors: Norbert MOSZNER, Ulrich SALZ, Peter BURTSCHER, Robert LISKA, Astrid GUGG, Christian GORSCHE
-
Publication number: 20110309554Abstract: A method and a device for processing a light-polymerizable material (5, 55) for building up an object (27) in layers, using a lithography based generative manufacture having a construction platform (12) for building up the object (27), a projecting exposure unit (10, 60) that can be controlled for locally selected exposing of a surface on the construction platform (12, 62) to an intensity pattern having a prescribed shape, and a control unit (11, 61) prepared for polymerizing overlapping layers (28) on the construction platform (12, 62) in successive exposure steps, each having a prescribed geometry, by controlling the projecting exposure unit (10, 60), in order to thus successively build up the object (27) in the desired shape, said shape resulting from the sequence of layer geometries.Type: ApplicationFiled: October 20, 2008Publication date: December 22, 2011Applicants: TECHNISCHE UNIVERSITAT WIEN, IVOCLAR VIVADENT, AGInventors: Robert Liska, Johannes Patzer, Jürgen Stampfl, Wolfgang Wachter, Christoph Appert
-
Patent number: 8022155Abstract: The invention relates to polymerizable compositions which comprise 10-80% by weight of a reactive diluent based on acrylic acid or methacrylic acid derivatives, and 10-50% by weight of a monomer of the indicated chemical formula which is liquid or which can be dissolved in the formulation. The formula may contain amino acid residues or peptide sequences, especially such that are specific of the collagen. These structural elements allow the enzymatic degradation of the polymers of the inventive composition.Type: GrantFiled: April 10, 2006Date of Patent: September 20, 2011Assignee: Technische Universitat WienInventors: Robert Liska, Monika Schuster, Jürgen Stampfl, Heinrich Gruber, Franz Varga
-
Patent number: 7927538Abstract: Slip based on a polyreactive binder, polymerization initiator and filler, which contains (A) 5-65 wt.-% polymerizable binder, (B) 0.001-1.0 wt.-% photoinitiator and (C) 35-90 wt.-% surface-modified ceramic and/or glass ceramic particles relative to the overall mass of the slip, and process for the preparation of ceramic mouldings by rapid prototyping processes using the slip.Type: GrantFiled: February 27, 2009Date of Patent: April 19, 2011Assignees: Ivoclar Vivadent AG, Technische Universitat WienInventors: Norbert Moszner, Wolfgang Wachter, Christoph Appert, Volker M. Rheinberger, Robert Liska, Jurgen Stampfl, Johannes Patzer
-
Publication number: 20100303804Abstract: The present invention relates to a polymerization-curable composition for the preparation of biodegradable, biocompatible, cross-linked polymers on the basis of polyvinyl alcohol comprising: 5 to 100% by weight of (a) vinyl ester monomer(s) of one of the general formulas (I) to (III): wherein X is oxygen, sulfur, nitrogen, or phosphorus; n is 1 to 1000, at least 20% of the n being ?2; the R1 are selected from hydrogen; straight, branched or cyclic, saturated or unsaturated, n-valent hydrocarbon groups having 1 to 30 carbon atoms, which optionally have heteroatoms and are optionally substituted with one or more substituents selected from —OH, —COON, —CN, —CHO, and ?O, and n-valent radicals of biodegradable, biocompatible oligomers and polymers; m is an integer from 1 to 5; the R2 are selected from hydrogen, —OH, ?O, and the options listed for R1; and the R3 are selected from hydrogen, —OH, and the options listed for R1; 0 to 50% by weight of ethylenically unsaturated co-monomers; 0 to 10% by weight of (a)Type: ApplicationFiled: November 21, 2008Publication date: December 2, 2010Applicant: TECHNISCHE UNIVERSITAT WIENInventors: Robert Liska, Jürgen Stampfl, Franz Varga, Heinrich Gruber, Stefan Baudis, Christian Heller, Monika Schuster, Helga Bergmeister, Günter Weigel, Claudia Dworak
-
Patent number: 7815835Abstract: The invention relates to a method for producing three-dimensional objects, comprising producing a three-dimensional structure by sequential selective curing of layers of a composition curable with visible and/or ultraviolet light into a solid polymeric material by sequential exposure of the individual layers to UV and/or visible light, whereafter a three-dimensional object is produced by use of the three-dimensional structure thus formed, followed by removing the three-dimensional structure from or of the three-dimensional object, characterized in that removing the three-dimensional structure is accomplished by chemically cleaving the polymeric material as well as simultaneously or subsequently dissolving the material in a solvent or mixed solvent and/or melting the material.Type: GrantFiled: June 29, 2006Date of Patent: October 19, 2010Assignee: Technische Universitat WienInventors: Jürgen Stampfl, Heinrich Gruber, Helga Lichtenegger, Robert Liska, Robert Inführ
-
Patent number: 7714034Abstract: Polymerizable dental material which contains at least one radically-polymerizable monomer and at least one bisacylphosphine oxide of the Formula I, in which R1 is a linear or branched C2 to C14 alkyl residue, which can be interrupted by one or more O atoms, PG-Y—R2—X— or a substituted or unsubstituted, aromatic C6 to C14 radical; R2 is absent or a linear or branched C1 to C20 alkylene radical, which can be interrupted by one or more O atoms; R3 is H, a linear or branched C1 to C6 alkyl residue or PG-Y—R2—X—; R4 is a linear or branched C1-C6 alkyl or —O—C1-C6 alkyl residue; R5 is H or PG-Y—R2—X—; R6 is H or PG-Y—R213 X—; PG is a polymerizable group; X is absent, O or S; Y is absent, O, S, an ester, amide or urethane group; the bisacylphosphine oxide having at least one PG-Y—R2—X group and X and/or Y being absent if R2 is absent.Type: GrantFiled: March 21, 2006Date of Patent: May 11, 2010Assignee: Ivoclar Vivadent AGInventors: Norbert Moszner, Volker M. Rheinberger, Ulrich Salz, Heinrich Gruber, Robert Liska, Beate Ganster, Gerald Ullrich
-
Publication number: 20100029801Abstract: Slip based on a polyreactive binder, polymerization initiator and filler, which contains (A) 5-65 wt.-% polymerizable binder, (B) 0.001-1.0 wt.-% photoinitiator and (C) 35-90 wt.-% surface-modified ceramic and/or glass ceramic particles relative to the overall mass of the slip, and process for the preparation of ceramic mouldings by rapid prototyping processes using the slip.Type: ApplicationFiled: February 27, 2009Publication date: February 4, 2010Applicants: Ivoclar Vivadent AG, Technische Universitat WienInventors: Norbert MOSZNER, Wolfgang WACHTER, Christoph APPERT, Volker M. RHEINBERGER, Robert LISKA, Jurgen STAMPFL, Johannes PATZER