Patents by Inventor Gunther Lechner
Gunther 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: 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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Patent number: 6908953Abstract: The present invention is directed to polymerizable dental compositions containing (a) 3 to 80 wt. % of cycloaliphatic epoxides; b) 0 to 80 wt. % of an epoxide or a mixture of epoxides which are different from a); c) 3 to 85 wt. % of a filler material; d) 0.01 to 25 wt. % of initiators, inhibitors and/or accelerators; e) 0 to 25 wt. % of auxiliary agents, the individual percentages of which are in relation to the total weight. The new polymerizable agents are particularly suited as dental material.Type: GrantFiled: March 18, 2003Date of Patent: June 21, 2005Assignee: ESPE Dental AGInventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
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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: 20040254260Abstract: 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: ApplicationFiled: December 22, 2003Publication date: December 16, 2004Inventors: Markus Mikulla, Gunther Lechner, Klaus-Peter Stefan, Gabrielle Rackelmann, Gunther Eckhardt
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Publication number: 20040024113Abstract: The invention relates to polymerizable compositions comprisingType: ApplicationFiled: March 18, 2003Publication date: February 5, 2004Applicant: ESPE Dental AGInventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
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Patent number: 6599960Abstract: The invention relates to preparations with improved curing behavior, which are characterized in that they contain 0.0005 to 50 wt. % of soluble and/or fine-particle organic and/or inorganic alkaline earth and/or alkali metal compounds. The preparations according to the invention may be used for bonding, sealing, casting and coating substrates, also in medical dental and technical dental preparations, and for making impressions of articles and, more particularly, for making dental impressions.Type: GrantFiled: July 13, 2000Date of Patent: July 29, 2003Assignee: Espe Dental AGInventors: Gunther Eckhardt, Gunther Lechner, Erich Wanek, Ursula Somnitz
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Publication number: 20030008967Abstract: The invention relates to urethane prepolymers, obtainable by reaction of:Type: ApplicationFiled: June 14, 2002Publication date: January 9, 2003Inventors: Reinhold Hecht, Gunther Lechner, Thomas Lehmann, Gunther Eckhardt, Bernd Gangnus
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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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Publication number: 20020002212Abstract: The invention relates to polymerizable compositions comprisingType: ApplicationFiled: January 16, 2001Publication date: January 3, 2002Applicant: Espe Dental AGInventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
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Patent number: 6335413Abstract: The invention relates to curable materials containing (A) optionally organopolysiloxanes with at least two unsaturated groups in the molecule, (B) organohydrogenpolysiloxanes with at least 3 SiH groups in molecule, (C) optionally organopolysiloxanes without reactive groups (D) catalyst (E) optionally hydrophilizing agents, (F) fillers and (G) optionally conventional dental additives, adjuvants and colorants, and (H) at least one silane dendrimer with terminal alkenyl groups The materials are particularly suitable for dental materials and are characterized by a particularly good end hardness with excellent processing viscosity.Type: GrantFiled: February 3, 2000Date of Patent: January 1, 2002Assignee: ESPE Dental AGInventors: Joachim Zech, Gunther Lechner
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Patent number: 6245828Abstract: The present invention is directed to polymerizable dental compositions containing a) 3 to 80 wt. % of cycloaliphatic epoxides; b) 0 to 80 wt. % of an epoxide or a mixture of epoxides which are different from a); c) 3 to 85 wt. % of a filer material; d) 0.01 to 25 wt. % of initiators, inhibitors and/or accelerators; e) 0 to 25 wt. % of auxiliary agents, the individual percentages of which are in relation to the total weight. The new polymerizable agents are particularly suited as dental material.Type: GrantFiled: September 21, 1998Date of Patent: June 12, 2001Assignee: ESPE Dental AGInventors: Wolfgang Weinmann, Oswald Gasser, Rainer Guggenberger, Gunther Lechner, Wolfgang Soglowek, Joachim Zech
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Patent number: 6127449Abstract: The invention relates to impression compositions based on vulcanizable pother materials, which are characterized in that the ready-mixed pastes comprisea) 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 .gtoreq.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, andc) 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 favourable effect on their preparation costs, and can easily be mixed.Type: GrantFiled: March 19, 1998Date of Patent: October 3, 2000Assignee: Thera Patent GmbH & Co. KG Gesellschaft fur industrielle SchutzrechteInventors: Peter Bissinger, Gunther Lechner, Erich Wanek
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Patent number: 5968998Abstract: Dental compositions based on an bifunctional or polyfunctional acrylic-acid and/or methacrylic-acid esters, which contain an initiator system for radical polymerization and which additionally contain a compound of the general formula ##STR1## in which: Ar represents aryl or substituted aryl,R.sup.1, R.sup.2 and R.sup.3 represent hydrogen, aryl or substituted aryl, straight-chain or branched chain C.sub.1-18 -alkyl, C.sub.1-18 -alkoxyl or C.sub.1-17 -alkoxycarbonyl, in which alkyl and alkoxyl can be substituted by halogen or aryl,in which, R.sup.1 or R.sup.2, when represented by aryl or substituted aryl, C.sub.1-18 -alkyl or C.sub.1-18 -alkoxyl, can be linked with Ar by a single-bond andin which, Ar, when represented by phenyl, C.sub.1-18 -alkylphenyl, C.sub.1-18 -alkoxylphenyl, carboxyl-C.sub.1-17 -alkylphenyl or halogenphenyl, R.sup.2 can be represented by --O--, which is linked with the phenyl or phenyl moiety of Ar to a benzofuran, andin which at least one of R.sup.1 to R.sup.Type: GrantFiled: April 16, 1993Date of Patent: October 19, 1999Assignee: ESPE Stiftung & Co. Produktions-und Vertriebs KGInventors: Peter Jochum, Rainer Guggenberger, Gunther Lechner, Klaus Ellrich
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Patent number: 5750589Abstract: The present invention relates to dental impression compounds which contain as hydrophilation agent 0.1 to 10 wt.-%, relative to the total weight of the compound, of a polyether carbosilane.Type: GrantFiled: May 16, 1996Date of Patent: May 12, 1998Assignee: Thera Patent GmbH & Co. KG Gesellschaft furInventors: Joachim Zech, Erich Wanek, Gunther Lechner, Peter Bissinger
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Patent number: 5583164Abstract: Dental compositions based on an at least bifunctional or polyfunctional acrylic-acid and/or methacrylic-acid esters, which contain an initiator system for radical polymerization and which additionally contain a compound of the general formula ##STR1## in which: Ar represents aryl or substituted aryl,R.sup.1, R.sup.2 and R.sup.3 represent hydrogen, aryl or substituted aryl, straight-chain or branched chain C.sub.1-18 -alkyl, C.sub.1-18 -alkoxyl or C.sub.1-17 -alkoxycarbonyl, in which alkyl and alkoxyl can be substituted by halogen or aryl,in which, R.sup.1 or R.sup.2, when represented by aryl or substituted aryl, C.sub.1-18 -alkyl or C.sub.1-18 -alkoxyl, can be linked with Ar by a single-bond andin which, Ar, when represented by phenyl, C.sub.1-18 -alkylphenyl, C.sub.1-18 -alkoxylphenyl, carboxyl-C.sub.1-17 -alkylphenyl or halogenphenyl, R.sup.2 can be represented by --O--, which is linked with the phenyl or phenyl moiety of Ar to a benzofuran, andin which at least one of R.sup.1 to R.sup.Type: GrantFiled: May 25, 1995Date of Patent: December 10, 1996Assignee: ESPE Stiftung & Co. Produktions-und Vertriebs KGInventors: Peter Jochum, Rainer Guggenberger, Gunther Lechner, Klaus Ellrich
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Patent number: 5086148Abstract: A polyether-impression material comprising components(a) a polyether, which has at least two optionally substituted vinyl- and/or allyl-end groups,(b) an SiH component,(c) a platinum catalyst, and optionally(d) the usual additivescharacterized in that the SiH-component (b) can be obtained by the reaction of at least a bi- functional, or polyfunctional, e.g., trifunctional, allyl- or vinyl-hydrocarbon compound, the hydrocarbon radical of which, without taking account of the allyl- or vinyl-groups and the optionally present alkylene ether groups, has 6 to 30 C-atom and contains at least one aromatically unsaturated, heterocyclic, or cycloaliphatic ring, with at least one mole per vinyl- or allyl-group of at least a bifunctional, or polyfunctional, e.g., trifunctional, SiH compound of the formula: ##STR1## in which e=0 to 8,g=0 to 8,h=0 to 4 andR.sup.4 and R.sup.10 are the same or different, and are each H, methyl or ethyl, with the proviso that at least 1 and at the most 5 of R.sup.4 to R.sup.Type: GrantFiled: November 14, 1989Date of Patent: February 4, 1992Assignee: ESPE Stiftung & Co., Produktions - und Vertriebs KGInventors: Peter Jochum, Oswald Gasser, Wolf-Dietrich Zahler, Gunther Lechner, Rainer Guggenberger, Klaus Ellrich
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Patent number: 4946901Abstract: Polymerizable compositions are described on the basis of (meth)acrylic acid esters which contain as filler a precipitation polymer that is formed from acrylic acid esters and/or methacrylic acid esters, and possibly other copolymerizable monomers, with 10 to 100 mol % of the (meth)acrylic acid esters being bi or polyfunctional. These compositions are particularly suitable as dental compositions.Type: GrantFiled: May 4, 1989Date of Patent: August 7, 1990Assignee: ESPE Stiftung & Co. Produktions- und Vertriebs KGInventors: Gunther Lechner, Klaus Ellrich, Rainer Guggenberger, Oswald Gasser
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Patent number: 4867790Abstract: An ionogenic compound, soluble or dispersible in aziridine compounds is utilized for delaying the polymerization of aziridine compounds initiated by a sulfonium salt. Said ionogenic compounds contain an anion which is more nucleophilic than the anion present in the sulfonium salt employed. Moreover, a preparation for dental purposes is described which contains these components.Type: GrantFiled: January 27, 1988Date of Patent: September 19, 1989Assignee: ESPE Stiftung & Co. Produktions- und Vertriebs KGInventors: Peter Jochum, Wolf-Dietrich Zahler, Oswald Gasser, Gunther Lechner, Klaus Ellrich
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Patent number: 4160504Abstract: A stackable, tray-type packaging unit for semiconductor discs, having a lr portion accommodating the discs and a matching lid, comprising two upright, elongated side walls in the lower portion and two narrow end walls, all walls as well as the lid consisting of deep-drawn plastic material inert to the disc material. A plurality of ribs are formed opposite to each other on the side walls, serving as guide means for the discs during the loading of the unit, stabilizing ribs for accommodating the discs are provided in the base of the lower portion on the joining line between opposite guide ribs. The lower part of the side walls are curved inwardly at an angle of 30.degree. to 60.degree. with respect to the perpendicular upper part.Type: GrantFiled: January 19, 1978Date of Patent: July 10, 1979Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbHInventors: Walter Kudlich, Hans Herrmann, Gunther Lechner, Kurt Berger
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Patent number: 4070797Abstract: Process for making haze-free surfaces of semiconductor bodies which comprs a first step of polishing the surface by means of a polishing agent containing at least one member of the group consisting of quartz, silica, silicates and fluosilicates, and a second step of polishing the surface by means of a polishing agent containing in addition to the above defined agents from 0.1 to 10% by weight calculated on the polishing agent of a nitrogen-free surfactant selected from the group consisting of anionic and non-ionic surfactants, and a mixture thereof.Type: GrantFiled: July 2, 1976Date of Patent: January 31, 1978Assignee: Wacker-Chemitronic Gesellshaft fur Elektronic Grundstoffe mbHInventors: Rudolf Griesshammer, Helmut Kirschner, Gunther Lechner