Patents by Inventor Johannes Patzer
Johannes Patzer 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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Patent number: 10967564Abstract: A method for the layered construction of a shaped body of highly viscous photopolymerizable material, includes forming layers of the shaped body one after the other and one on top of the other by each forming a material layer of predetermined thickness (a) of the highly viscous photopolymerizable material in a tank, lowering a construction platform, or the shaped body at least partially formed on the construction platform, into the material layer so as to cause a layer of the highly viscous photopolymerizable material to form between the construction platform or the shaped body and the tank bottom, curing such layer in a position-selective manner, in particular by irradiation through the tank bottom, to provide the desired shape of the shaped body layer, wherein the thickness (a) of the material layer is varied at least once during the layered construction of the shaped body.Type: GrantFiled: March 30, 2016Date of Patent: April 6, 2021Assignee: Lithoz GmbHInventors: Johannes Homa, Johannes Patzer, Rafael Reiter, Manfred Spitzbart
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Patent number: 10864675Abstract: A method for the layered construction of a shaped body of highly viscous photopolymerizable material, where layers of said shaped body are formed one after the other and one on top of the other, includes forming a material layer of predetermined thickness (a) of the highly viscous photopolymerizable material in a tank, which has a bottom, and lowering the construction platform, or the shaped body at least partially formed on the construction platform, into the material layer so as to cause a layer of the highly viscous photopolymerizable material to form between the construction platform or shaped body and the tank bottom, which layer is cured in a position-selective manner, in particular by irradiation through the tank bottom, to provide the desired shape of the shaped body layer, in which at least one material layer includes a layer thickness variation in the lateral direction.Type: GrantFiled: March 30, 2016Date of Patent: December 15, 2020Assignee: Lithoz GmbHInventors: Johannes Homa, Johannes Patzer, Rafael Reiter, Manfred Spitzbart
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Publication number: 20180117835Abstract: A method for the layered construction of a shaped body of highly viscous photopolymerizable material, includes forming layers of the shaped body one after the other and one on top of the other by each forming a material layer of predetermined thickness (a) of the highly viscous photopolymerizable material in a tank, lowering a construction platform, or the shaped body at least partially formed on the construction platform, into the material layer so as to cause a layer of the highly viscous photopolymerizable material to form between the construction platform or the shaped body and the tank bottom, curing such layer in a position-selective manner, in particular by irradiation through the tank bottom, to provide the desired shape of the shaped body layer, wherein the thickness (a) of the material layer is varied at least once during the layered construction of the shaped body.Type: ApplicationFiled: March 30, 2016Publication date: May 3, 2018Inventors: Johannes HOMA, Johannes PATZER, Rafael REITER, Manfred SPITZBART
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Publication number: 20180071978Abstract: A method for the layered construction of a shaped body of highly viscous photopolymerizable material, where layers of said shaped body are formed one after the other and one on top of the other, includes forming a material layer of predetermined thickness (a) of the highly viscous photopolymerizable material in a tank, which has a bottom, and lowering the construction platform, or the shaped body at least partially formed on the construction platform, into the material layer so as to cause a layer of the highly viscous photopolymerizable material to form between the construction platform or shaped body and the tank bottom, which layer is cured in a position-selective manner, in particular by irradiation through the tank bottom, to provide the desired shape of the shaped body layer, in which at least one material layer includes a layer thickness variation in the lateral direction.Type: ApplicationFiled: March 30, 2016Publication date: March 15, 2018Inventors: Johannes HOMA, Johannes PATZER, Rafael REITER, Manfred SPITZBART
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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
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Patent number: 9764513Abstract: The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production, in which a layer of liquid photopolymerizable material is defined on a production platform, and is polymerized in an exposure region having a predetermined contour, a further layer of photopolymerizable material is defined, the layer defined last is polymerized in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, each exposure in an exposure region having a predetermined contour being carried out by controlled activation of individual exposure elements in a two-dimensional array of exposure elements, each exposure element being assigned an image element, wherein the exposure of the exposure region is carried out by a common light source and by a two-dimeType: GrantFiled: August 21, 2013Date of Patent: September 19, 2017Assignees: Ivoclar Vivadent AG, Technische Universität WienInventors: Jürgen Stampfl, Johannes Homa, Johannes Patzer, Gerald Mitteramskogler, Jörg Ebert, Jürgen Laubersheimer, Wolfgang Wachter
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Publication number: 20150258732Abstract: The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production, in which a layer of liquid photopolymerizable material is defined on a production platform, and is polymerized in an exposure region having a predetermined contour, a further layer of photopolymerizable material is defined, the layer defined last is polymerized in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, each exposure in an exposure region having a predetermined contour being carried out by controlled activation of individual exposure elements in a two-dimensional array of exposure elements, each exposure element being assigned an image element, wherein the exposure of the exposure region is carried out by a common light source and by a two-dimeType: ApplicationFiled: August 21, 2013Publication date: September 17, 2015Inventors: Jürgen Stampfl, Johannes Homa, Johannes Patzer, Gerald Mitteramskogler, Jörg Ebert, Jürgen Laubersheimer, Wolfgang Wachter
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Patent number: 9079357Abstract: The invention relates to a method for the layered construction of a shaped body made of highly viscous photopolymerizable material.Type: GrantFiled: March 23, 2012Date of Patent: July 14, 2015Assignees: Ivoclar Vivadent AG, Technische Universität WienInventors: Jörg Ebert, Johannes Homa, Jürgen Laubersheimer, Johannes Patzer, Jürgen Stampfl, Wolfgang Wachter
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Patent number: 9067359Abstract: A method and a device for processing light-polymerizable material for the assembly of a mold, utilizing a lithography-based generative manufacturing technique wherein a layer of a light-polymerizable material, the material being located in at least one trough (4) having a particularly light-transmissive, horizontal bottom (6), is polymerized by illumination on at least one horizontal platform (12), the platform having a prespecified geometry and projecting into a trough (4), in an illumination field, wherein the platform (12) is displaced vertically to form a subsequent layer, light-polymerizable material is then added to the most recently formed layer, and repetition of the foregoing steps leads to the layered construction of the mold in the desired form, which arises from the succession of layer geometries.Type: GrantFiled: October 16, 2013Date of Patent: June 30, 2015Assignees: Ivoclar Vivadent AG, Technische Universitat WienInventors: Gottfried Rohner, Wolfgang Wachter, Christoph Appert, Johannes Patzer, Jürgen Stampfl
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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
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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
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Publication number: 20140044824Abstract: A method and a device for processing light-polymerizable material for the assembly of a mold, utilizing a lithography-based generative manufacturing technique wherein a layer of a light-polymerizable material, the material being located in at least one trough (4) having a particularly light-transmissive, horizontal bottom (6), is polymerized by illumination on at least one horizontal platform (12), the platform having a prespecified geometry and projecting into a trough (4), in an illumination field, wherein the platform (12) is displaced vertically to form a subsequent layer, light-polymerizable material is then added to the most recently formed layer, and repetition of the foregoing steps leads to the layered construction of the mold in the desired form, which arises from the succession of layer geometries.Type: ApplicationFiled: October 16, 2013Publication date: February 13, 2014Inventors: Gottfried ROHNER, Wolfgang WACHTER, Christoph APPERT, Johannes PATZER, Jürgen STAMPFL
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Patent number: 8623264Abstract: A method and a device for processing light-polymerizable material for the assembly of a mold, utilizing a lithography-based generative manufacturing technique wherein a layer of a light-polymerizable material, the material being located in at least one trough (4) having a particularly light-transmissive, horizontal bottom (6), is polymerized by illumination on at least one horizontal platform (12), the platform having a prespecified geometry and projecting into a trough (4), in an illumination field, wherein the platform (12) is displaced vertically to form a subsequent layer, light-polymerizable material is then added to the most recently formed layer, and repetition of the foregoing steps leads to the layered construction of the mold in the desired form, which arises from the succession of layer geometries.Type: GrantFiled: October 20, 2008Date of Patent: January 7, 2014Assignees: Ivoclar Vivadent AG, Technische Universitat WienInventors: Gottfried Rohner, Wolfgang Wachter, Christoph Appert, Johannes Patzer, Jürgen Stampfl
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Publication number: 20120248657Abstract: The invention relates to a method for the layered construction of a shaped body made of highly viscous photopolymerizable material.Type: ApplicationFiled: March 23, 2012Publication date: October 4, 2012Applicants: TECHNISCHE UNIVERSITAT WIEN, IVOCLAR VIVADENT AGInventors: Jörg Ebert, Johannes Homa, Jürgen Laubersheimer, Johannes Patzer, Jürgen Stampfl, Wolfgang Wachter
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Publication number: 20110310370Abstract: A method and a device for processing light-polymerizable material for the assembly of a mold, utilizing a lithography-based generative manufacturing technique wherein a layer of a light-polymerizable material, the material being located in at least one trough (4) having a particularly light-transmissive, horizontal bottom (6), is polymerized by illumination on at least one horizontal platform (12), the platform having a prespecified geometry and projecting into a trough (4), in an illumination field, wherein the platform (12) is displaced vertically to form a subsequent layer, light-polymerizable material is then added to the most recently formed layer, and repetition of the foregoing steps leads to the layered construction of the mold in the desired form, which arises from the succession of layer geometries.Type: ApplicationFiled: October 20, 2008Publication date: December 22, 2011Applicants: TECHNISCHE UNIVERSITAT WIEN, IVOCLAR VIVADENT AGInventors: Gottfried Rohner, Wolfgang Wachter, Christoph Appert, Johannes Patzer, Jürgen Stampfl
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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
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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
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Publication number: 20100283188Abstract: The present invention relates to a method for the generative production of a shaped body (27) of material (5, 55) solidifiable under the effect of electromagnetic radiation, in particular a green compact for dental restoration, by means of a multiplicity of exposure steps (1001, 1002, 1003, 1004), characterized in that a new layer of material (5, 55) solidifiable under the effect of electromagnetic radiation, having a layer thickness which is less than or equal to half the penetration depth of the electromagnetic radiation into the solidifiable material (5, 55), is provided before an exposure step (1001, 1002, 1003, 1004), the layer provided is exposed in the exposure step (1001, 1002, 1003, 1004) only in a subregion (2001, 3001) of the shaped body layer to be formed, and a layer provided before a preceding exposure step, on which the new layer has been provided, being solidified together with the new layer in the exposed subregion (2001, 3001), and the exposed subregion (2001, 3001) is varied between the expType: ApplicationFiled: September 29, 2009Publication date: November 11, 2010Applicants: IVOCLAR VIVADENT AG, TECHNISCHE UNIVERSITAT WIENInventors: Gottfried ROHNER, Wolfgang WACHTER, Jürgen STAMPFL, Johannes PATZER, Johannes HOMA
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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