Patents by Inventor Guenther Lechner
Guenther Lechner 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: 7699605Abstract: The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.Type: GrantFiled: October 9, 2008Date of Patent: April 20, 2010Assignees: 3M Espe AG, 3M Innovative Properties CompanyInventors: Steven M. Aasen, Ahmed S. Abuelyaman, David K. Cinader, Jr., Hendrik M. Grupp, Miriam Hansen, Thomas Klettke, Guenther Lechner, Kevin M. Lewandowski, Thomas Luchterhandt, Sumita B. Mitra, Prabhakara S. Rao, Victoria A. Russell, Michael S. Wendland
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Publication number: 20090035728Abstract: The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.Type: ApplicationFiled: October 9, 2008Publication date: February 5, 2009Inventors: Steven M. Aasen, Ahmed S. Abuelyaman, David K. Cinader, JR., Hendrik M. Grupp, Miriam Hansen, Thomas Klettke, Guenther Lechner, Kevin M. Lewandowski, Thomas Luchterhandt, Sumita B. Mitra, Prabhakara S. Rao, Victoria A. Russell, Michael S. Wendland
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Patent number: 7456232Abstract: The invention relates to dental compounds that contain at least one polyacid or at least one polyacid and at least one salt of at least one polyacid. The polyacids used have at least one branch point in the polymer structure and are water-soluble and not cross-linked and their repeat units consist to at least 80 mole % of acrylic acid segments.Type: GrantFiled: November 19, 2001Date of Patent: November 25, 2008Assignee: 3M ESPE AGInventors: Markus Mikulla, Guenther Lechner, Klaus-Peter Stefan, Gabriele Rackelmann, Gunther Eckhardt
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Patent number: 7452924Abstract: The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.Type: GrantFiled: August 11, 2004Date of Patent: November 18, 2008Assignees: 3M Espe AG, 3M Innovative Properties CompanyInventors: Steven M. Aasen, Ahmed S. Abuelyaman, Hendrik M. Grupp, Miriam Hansen, Thomas Klettke, Guenther Lechner, Kevin M. Lewandowski, Thomas Luchterhandt, Sumita B. Mitra, Prabhakara S. Rao, Victoria A. Russell, Michael S. Wendland
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Patent number: 7276545Abstract: Mixtures of chain-extended N-alkylaziridino prepolymers are disclosed herein. The disclosed mixtures of chain-extended N-alkylaziridino prepolymers can be used in combination with additional materials to make curable formulations that can be used, for example, as dental materials such as impression compounds.Type: GrantFiled: May 29, 2002Date of Patent: October 2, 2007Assignee: 3M ESPE AGInventors: Gunther Eckhardt, Guenther Lechner, Erich Wanek
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Patent number: 7141616Abstract: The invention relates to urethane prepolymers, obtainable by reaction of: (A) 15 to 85 wt.-% of one or more ?,?-terminated poly(meth)acrylate diols, (B) 0 to 30 wt.-% of one or more radically curable, polyhydroxy-functional compounds, (C) 14 to 60 wt.-% of one or more polyisocyanates, (D) 1 to 40 wt.-% of a monofunctional compound, reactive vis-à-vis isocyanate groups, which also contains one or more radically curable grouping, as well as their use.Type: GrantFiled: December 15, 2000Date of Patent: November 28, 2006Assignee: 3M ESPE AGInventors: Reinhold Hecht, Günther Lechner, Thomas Lehmann, Gunther Eckhardt, Bernd Gangnus
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Publication number: 20050176844Abstract: The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.Type: ApplicationFiled: August 11, 2004Publication date: August 11, 2005Inventors: Steven Aasen, Ahmed Abuelyaman, David Cinader, Hendrik Grupp, Miriam Hansen, Thomas Klettke, Guenther Lechner, Kevin Lewandowski, Thomas Luchterhandt, Sumita Mitra, Prabhakara Rao, Victoria Russell, Michael Wendland
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Patent number: 6906117Abstract: Arizidinosilicones of the general formula (1), wherein R1 represents H, C1-C12 alkyl, C2-C12 alkenyl, C2-C12 alkinyl, C7-C15 alkaryl, C7-C15 aralkyl, C3-C12 cycloalkyl and these groups can be substituted with Cl or F partially, completely or in a mixed manner and/or may contain 0 to 5 heteroatoms selected from O, N, S, R2 represents a group of the selection of R1 and/or R4, and R3 represents SiRl3 or SiR12R4, and wherein R4 represents formula (2), and A represents an (n+1) radical saturated, unsaturated or aromatic, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that includes 1 to 18 carbon atoms, B is selected from O, S, NR1, D is selected from C(O)O, C(O)NR1, C(O), C(O)C(O), C(O)(CH2)m(C(O), C(S)NR1, CH2, E represents a diradical saturated or unsaturated, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that includes 0 to 18 carbon atoms, a is 0 or 1, f is an integer from 2 to 1000, n, m isType: GrantFiled: May 30, 2001Date of Patent: June 14, 2005Assignee: 3M Espe AGInventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
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Patent number: 6867246Abstract: N-alkyl aziridine block copolymers of the general structure (1), wherein R1 represents H, C1-C12 alkyl, C2-C12 alkenyl, C2-C12 alkinyl, C7-C15 aralkyl C7-C15 aralkyl, or C3-C12 cycloalkyl and these groups can be substituted with C1 or F partially, completely or in a mixed manner and/or may contain 0 to 5 heteroatoms selected from O, N, S; R2 represents a group selected from R1 and/or R4; R3 represents SiR13 or SiR12R4, wherein R4 represents a group of the general formula (2), wherein A represents an (n+1) radical saturated, unsaturated or aromatic, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that comprises 1 to 18 carbon atoms; B is selected from O, S, NR1; D is selected from C(O)O, C(O)NR1, C(O), C(S)NR1, CH2; E represents a diradical saturated or unsaturated, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S, and that comprises 0 to 18 carbon atoms; Q represents and ?, ?-radical polyether chaiType: GrantFiled: May 30, 2001Date of Patent: March 15, 2005Assignee: 3M Espe AGInventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
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Patent number: 6833425Abstract: The invention relates to fillers for plastics formulations based on polyurethane and the use thereof.Type: GrantFiled: June 13, 2002Date of Patent: December 21, 2004Assignee: 3M ESPE AGInventors: Reinhold Hecht, Bernd Gangnus, Günther Lechner
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Publication number: 20040149164Abstract: The invention relates to a mixture of elongated N-alkylaziridine prepolymers of general formula (I) wherein n represents a whole number between 1 and 50; R1 represents H or C1 to C12 alkyl; X represents a bivalent, saturated or unsaturated, linear, branched, cyclic or polycyclic hydrocarbon radical which can contain between 0 and 5 heteroatoms from the group 0, NR1, S, which contains a total of between 1 and 50, preferably between 2 and 30, and ideally between 2 and 20 C atoms, and which comprises a group selected from —NR1-(C═O)—O—, —NR1-(C═O)—NR1-, —(C═O)—O—, —(C═O)—S—, which represents that covalent link with the polymer radical Z; Z represents a bivalent prepolymer radical having number-average molar masses of between 1,500 and 45,000 g/mole, from the group comprising polyester, polycarbonate, polyolefins, polysiloxane and polyethers; E represents —X′-A-X′—; A represents a double radical, saturateType: ApplicationFiled: November 26, 2003Publication date: August 5, 2004Inventors: Gunther Eckhardt, Guenther Lechner, Erich Wanek
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Publication number: 20040014907Abstract: N-alkyl aziridine block copolymers of the general structure (1), wherein R1 represents H, C1-C12 alkyl, C2-C12 alkenyl, C2-C12 alkinyl, C7-C15 alkaryl, C7-C15 aralkyl or C3-C12 cycloalkyl and these groups can be substituted with C1 or F partially, completely or in a mixed manner and/or may contain 0 to 5 heteroatoms selected from O, N, S; R2 represents a group selected from R1 and/or R4; R3 represents SiR13 or SiR12R4, wherein R4 represents a group of the general formula (2), wherein A represents an (n+1) radical saturated, unsaturated or aromatic, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that comprises 1 to 18 carbon atoms; B is selected from O, S, NR1; D is selected from C(O)O, C(O)NR1, C(O), C(S)NR1, CH2; E represents a diradical saturated or unsaturated, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S, and that comprises 0 to 18 carbon atoms; Q represents and &agr;, &ohgr;-radicalType: ApplicationFiled: July 8, 2003Publication date: January 22, 2004Inventors: Reinhard Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
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Publication number: 20040014924Abstract: Arizidinosilicones of the general formula (1), wherein R1 represents H, C1-C12 alkyl, C2-C12 alkenyl, C2-C12 alkinyl, C7-C15 alkaryl, C7-C15 aralkyl, C3-C12 cycloalkyl and these groups can be substituted with C1 or F partially, completely or in a mixed manner and/or may contain 0 to 5 heteroatoms selected from O, N, S, R2 represents a group of the selection of R1 and/or R4, and R3 represents SiR13 or SiR12R4, and wherein R4 represents formula (2), and A represents an (n+1) radical saturated, unsaturated or aromatic, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that includes 1 to 18 carbon atoms, B is selected from O, S, NR1, D is selected from C(O)O, C(O)NR1, C(O), C(O)C(O), C(O)(CH2)m(C(O), C(S)NR1, CH2, E represents a diradical saturated or unsaturated, linear, branched or cyclic hydrocarbon group that may contain 0 to 5 heteroatoms selected from O, N, S and that includes 0 to 18 carbon atoms, a is 0 or 1, f is an integer from 2 to 1000, n,Type: ApplicationFiled: June 4, 2003Publication date: January 22, 2004Inventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
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Patent number: 6395801Abstract: The invention relates to impression compositions based on vulcanizable polyether materials, which are characterized in that the ready-mixed pastes comprise a) approx. 30 to 70 wt. % of aziridino-polyether, b) approx. 5 to 20 wt. % of a triacyl glyceride of non-animal origin which has a stearoyl content of ≧70 wt. %, based on the acyl content of the triacyl glyceride, or, in the case of a lower stearoyl content and if this adversely influences the storage stability of the impression composition, has been esterified in itself beforehand, and c) approx. 10 to 65 wt. % of customary catalysts, auxiliaries and additives, in each case based on the total weight of the composition. The impression compositions are distinguished by consistently good mechanical properties of the polymerized materials, have a comparatively low proportion of aziridino-polyether, which has a favorable effect on their preparation costs, and can easily be mixed.Type: GrantFiled: April 6, 2000Date of Patent: May 28, 2002Assignee: Thera Patent GmbH & Co KG Gesellschaft fur Industrielle SchutzrechteInventors: Peter Bissinger, Günther Lechner, Erich Wanek
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Patent number: 6383279Abstract: A dental impression composition comprises a polyether derivative functionalized via the hydroxyl groups of a polyether polyol with groups such as aziridine, epoxide and unsaturated substituents including (meth)acrylic, allyl, vinyl, vinyl ether or maleate groups, wherein the level of cyclic oligomeric polyethers is less than 5.0 weight percent.Type: GrantFiled: September 11, 1998Date of Patent: May 7, 2002Assignee: ESPE Dental AGInventors: Gunther Eckhardt, Erich Wanek, Guenther Lechner, Peter Bissinger, Markus Mikulla