Patents by Inventor Dierk Lubbers
Dierk Lubbers 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: 20140134572Abstract: A polymeric material is curable from an uncured state to a cured state and includes at least one finely dispersed filler. The material has in the cured state, a translucency in the range of about 30% to about 100%, and shore A hardness according to DIN 53505:1984 in the range of about 20 to about 70 and a tensile strength according to DIN 53504:1994 in the range of about 1.5 MPa to about 4.5 MPa. The material has in the uncured state, a consistency according to DIN ISO 4823:2000 of type 0 to 3.Type: ApplicationFiled: January 17, 2014Publication date: May 15, 2014Applicant: COLTENE AGInventors: Stephan Lampl, Dierk Lubbers, Ralf Kollefrath, Manfred Kalt
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Patent number: 8440098Abstract: The invention relates to a composition which comprises 1 to 80% by weight of at least one acid which has a pKa of 2 or less; a protic solvent; a complexing agent for Ca2+ ions; for use as conditioning agent for etching enamel lesions.Type: GrantFiled: April 10, 2009Date of Patent: May 14, 2013Assignee: Ernst Muhlbauer GmbH & Co. KGInventors: Stephan Neffgen, Swen Neander, Dierk Lubbers
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Patent number: 8183305Abstract: The invention provides an infiltrant for dental application that comprises crosslinking monomers, having a penetration coefficient PC>50 cm/s. In accordance with the invention the infiltrant comprises at least one nanoscale radiopaque filler and/or radiopaque organic compound, while ensuring sufficient contrast to surrounding tooth and bone tissue in X-ray diagnostics.Type: GrantFiled: August 6, 2009Date of Patent: May 22, 2012Assignee: Ernst Muhlbauer GmbH & Co. KGInventors: Stephan Neffgen, Swen Neander, Dierk Lübbers
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Patent number: 8142833Abstract: The present invention is related to clear crosslinkable polymeric masses for the registration of fingerprints, allowing to obtain positive reproductions of fingerprints by taking a photograph through a clear cured layer obtained from said polymeric masses.Type: GrantFiled: January 9, 2006Date of Patent: March 27, 2012Assignee: Coltene AGInventors: Dierk Lubbers, Stephan Lampl, Ralf Kollefrath
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Patent number: 8106109Abstract: The invention concerns a dental filling material with dual hardening mechanism, wherein i) a first hardening mechanism is based on a photocuring reaction, preferably a radical reaction, and ii) a second hardening mechanism is dependent on H2O as a reactant, especially as a ligand. Preferably, the second hardening mechanism is a gypsum-type reaction. Owing to the expansion of the composition an excellent marginal seal can be achieved, while the first hardening mechanism allows for a rapid cure on demand.Type: GrantFiled: May 12, 2008Date of Patent: January 31, 2012Assignee: Coltene Whaledent AGInventors: Ralf Böhner, Dierk Lübbers, Silvan Benz
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Patent number: 7998264Abstract: A hardenable dental material, exhibiting a reflectivity in the hardened state of preferably more than about 70%, measured according to EN ISO 2813 (1999) with an angle of incidence of 60°. The material provides for improved visual readability in the hardened state.Type: GrantFiled: May 2, 2006Date of Patent: August 16, 2011Assignee: Coltene Whaledent AGInventors: Dierk Lubbers, Ralf Kollefrath, Manfred Kalt
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Patent number: 7789663Abstract: The invention relates to a process of retraction of sulcus, comprising the steps of: applying a silicone material onto and/or at the vicinity of the boundary of a tooth and adjacent sulcus, which silicone material expands during or after its curing reaction; applying a cap onto said tooth, thereby forming a chamber over said silicone material, wherein said chamber comprises as its walls the tooth, the cap and an outer section of said sulcus; whereby said chamber allows for the silicone material to expand into the crevice between sulcus and tooth. Said cap is at least partially filled with a plastically deformable material when applied onto said tooth in step; and/or said cap is deformable, especially under biting pressure.Type: GrantFiled: March 8, 2005Date of Patent: September 7, 2010Assignee: Coltene AGInventors: Ralf Kollefrath, Stephan Lampl, Dierk Lubbers
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Publication number: 20100041789Abstract: The invention provides an infiltrant for dental application that comprises crosslinking monomers, having a penetration coefficient PC>50 cm/s. In accordance with the invention the infiltrant comprises at least one nanoscale radiopaque filler and/or radiopaque organic compound, whilst ensuring sufficient contrast to surrounding tooth and bone tissue in X-ray diagnostics.Type: ApplicationFiled: August 6, 2009Publication date: February 18, 2010Applicant: ERNST MUHLBAUER GMBH & CO. KGInventors: Stephan Neffgen, Swen Neander, Dierk Lübbers
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Publication number: 20100035213Abstract: Sulcus is retracted from teeth prior to performing a dental procedure on the teeth by applying an expandable curable silicone compound to the surface of the teeth and preventing the silicone compound from expanding in a direction away from the surface of the teeth, thereby forcing the silicone to expand against the sulcus and forcing retraction of the sulcus from contact with the teeth.Type: ApplicationFiled: August 5, 2009Publication date: February 11, 2010Applicant: COLTENE WHALEDENT AGInventors: Dierk Lubbers, Stephan Lampl, Ralf Kollefrath
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Publication number: 20090256108Abstract: The invention relates to a composition which comprises a) 4 to 80% by weight of at least one acid which has a pKa of 2 or less; b) a protic solvent; the acid having a saturation vapor pressure at 20° C. of 120 mbar or less, for use as conditioning agent for etching enamel lesions.Type: ApplicationFiled: April 10, 2009Publication date: October 15, 2009Applicant: Ernst Muhlbauer GmbH & Co. KGInventors: Stephan Neffgen, Swen Leander, Dierk Lubbers
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Publication number: 20090256109Abstract: The invention relates to a composition which comprises 1 to 80% by weight of at least one acid which has a pKa of 2 or less; a protic solvent; a complexing agent for Ca2+ ions; for use as conditioning agent for etching enamel lesions.Type: ApplicationFiled: April 10, 2009Publication date: October 15, 2009Applicants: Ernst Muhlbauer GmbH & Co. KG, Charite Universitatsmedizin BerlinInventors: Stephan Neffgen, Swen Neander, Dierk Lubbers
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Patent number: 7549862Abstract: The invention relates to a process of retraction of sulcus, comprising the steps of: applying a silicone material onto and/or at the vicinity of the boundary of a tooth and adjacent sulcus, which silicone material expands during or after its curing reaction; applying a cap onto said tooth, thereby forming a chamber over said silicone material, wherein said chamber comprises as its walls the tooth, the cap and an outer section of said sulcus; whereby said chamber allows for the silicone material to expand into the crevice between sulcus and tooth. Said cap is at least partially filled with a plastically deformable material when applied onto said tooth in step; and/or said cap is deformable, especially under biting pressure.Type: GrantFiled: March 14, 2007Date of Patent: June 23, 2009Assignee: Coltene AGInventors: Ralf Kollefrath, Stephan Lampl, Dierk Lubbers
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Publication number: 20090023115Abstract: The invention concerns a dental filling material with dual hardening mechanism, wherein i) a first hardening mechanism is based on a photocuring reaction, preferably a radical reaction, and ii) a second hardening mechanism is dependent on H2O as a reactant, especially as a ligand. Preferably, the second hardening mechanism is a gypsum-type reaction. Owing to the expansion of the composition an excellent marginal seal can be achieved, while the first hardening mechanism allows for a rapid cure on demand.Type: ApplicationFiled: May 12, 2008Publication date: January 22, 2009Applicant: COLTENE WHALEDENT AGInventors: Ralf BOHNER, Dierk LUBBERS, Silvan BENZ
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Publication number: 20070172792Abstract: The invention relates to a method of dental impression taking, comprising the step of applying a polymeric material at least partially to the region to be reproduced by the impression, wherein the polymeric material is translucent, and accordingly suitable polymeric materials.Type: ApplicationFiled: December 11, 2006Publication date: July 26, 2007Inventors: Stephan Lampl, Dierk Lubbers
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Publication number: 20070160952Abstract: The invention relates to a process of retraction of sulcus, comprising the steps of: applying a silicone material onto and/or at the vicinity of the boundary of a tooth and adjacent sulcus, which silicone material expands during or after its curing reaction; applying a cap onto said tooth, thereby forming a chamber over said silicone material, wherein said chamber comprises as its walls the tooth, the cap and an outer section of said sulcus; whereby said chamber allows for the silicone material to expand into the crevice between sulcus and tooth. Said cap is at least partially filled with a plastically deformable material when applied onto said tooth in step; and/or said cap is deformable, especially under biting pressure.Type: ApplicationFiled: March 14, 2007Publication date: July 12, 2007Inventors: Ralf Kollefrath, Stephan Lampl, Dierk Lubbers
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Publication number: 20070154861Abstract: A hardenable dental material, exhibiting a reflectivity in the hardened state of preferably more than about 70%, measured according to EN ISO 2813 (1999) with an angle of incidence of 600. The material provides for improved visual readability in the hardened state.Type: ApplicationFiled: May 2, 2006Publication date: July 5, 2007Inventors: Dierk Lubbers, Ralf Kollefrath, Manfred Kalt
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Publication number: 20070065770Abstract: Sulcus is retracted from teeth prior to perfroming a dental procedure on the teeth by applying an expandible curable silicone compound to the surface of the teeth and preventing the silicone compound from exanding in a direction away from the suface of the teeth, thereby forcing the silicone to expand against the sulcus and forcing retraction of the sulcus from contact with the teeth.Type: ApplicationFiled: October 10, 2006Publication date: March 22, 2007Inventors: Dierk Lubbers, Stephan Lampl, Ralf Kollefrath
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Publication number: 20060165871Abstract: The present invention is related to clear crosslinkable polymeric masses for the registration of fingerprints, allowing to obtain positive reproductions of fingerprints by taking a photograph through a clear cured layer obtained from said polymeric masses.Type: ApplicationFiled: January 9, 2006Publication date: July 27, 2006Inventors: Dierk Lubbers, Stephan Lampl, Ralf Kollefrath
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Publication number: 20050202367Abstract: The invention relates to a process of retraction of sulcus, comprising the steps of: applying a silicone material onto and/or at the vicinity of the boundary of a tooth and adjacent sulcus, which silicone material expands during or after its curing reaction; applying a cap onto said tooth, thereby forming a chamber over said silicone material, wherein said chamber comprises as its walls the tooth, the cap and an outer section of said sulcus; whereby said chamber allows for the silicone material to expand into the crevice between sulcus and tooth. Said cap is at least partially filled with a plastically deformable material when applied onto said tooth in step; and/or said cap is deformable, especially under biting pressure.Type: ApplicationFiled: March 8, 2005Publication date: September 15, 2005Inventors: Ralf Kollefrath, Stephan Lampl, Dierk Lubbers
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Publication number: 20050069838Abstract: Sulcus is retracted from teeth prior to performing a dental procedure on the teeth by applying an expandible curable silicone compound to the surface of the teeth and preventing the silicone compound from exanding in a direction away from the suface of the teeth, thereby forcing the silicone to expand against the sulcus and forcing retraction of the sulcus from contact with the teeth.Type: ApplicationFiled: March 15, 2004Publication date: March 31, 2005Inventors: Ralf Kollefrath, Stephan Lampl, Dierk Lubbers