Patents by Inventor Gunther Eckhardt

Gunther Eckhardt 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: 8415266
    Abstract: The invention relates to catalyst components, containing: (A) at least one Brönsted acid, (B) water, (C) at least one antacid-acting compound from the group consisting of the oxides, hydroxides, carbonates and/or carboxylates of the elements aluminum, chromium, copper, germanium, manganese, lead, antimony, tin, tellurium, titanium and/or zinc, (D) optionally at least one inert diluent, (E) optionally at least one modifier, the mixture of one part by weight of the catalyst component with three parts by weight bisaziridino polyether with an average imino equivalent mass of 3100, preparable from a polyetherdiol which comprises ethylene oxide and tetrahydrofuran units in the molar ratio 1:3.5 solidifying within 0.5 to 20 minutes to a solid elastomer material which has a shore A hardness of at least 20 according to DIN 53505 after 24 hours' storage time at room temperature.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: April 9, 2013
    Assignee: 3M Deutschland GmbH
    Inventors: Gunther Eckhardt, Erich Wanek, Bernd Kuppermann
  • Patent number: 7923485
    Abstract: The invention relates to preparations based on aziridino polymers and comprising monofunctional aziridines and to the use thereof in producing dental materials, especially impression materials.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: April 12, 2011
    Assignee: 3M ESPE AG
    Inventors: Thomas Klettke, Cornelia Führer, Adrian Eckert, Gunther Eckhardt, Erich Wanek
  • Publication number: 20090012209
    Abstract: The present invention features ionomer compositions containing a filler surface modified with a polyacid. The compositions can be used in a variety of dental and orthodontic applications, for example, as adhesives, cements, restoratives, coatings and sealants.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 8, 2009
    Inventors: Gunther Eckhardt, Markus Mikulla, Robert F. Peez, Peter Bissinger, Gabriele Gottschalk-Gaudig
  • Patent number: 7456232
    Abstract: 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: Grant
    Filed: November 19, 2001
    Date of Patent: November 25, 2008
    Assignee: 3M ESPE AG
    Inventors: Markus Mikulla, Guenther Lechner, Klaus-Peter Stefan, Gabriele Rackelmann, Gunther Eckhardt
  • Patent number: 7276545
    Abstract: 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: Grant
    Filed: May 29, 2002
    Date of Patent: October 2, 2007
    Assignee: 3M ESPE AG
    Inventors: Gunther Eckhardt, Guenther Lechner, Erich Wanek
  • Patent number: 7141616
    Abstract: 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: Grant
    Filed: December 15, 2000
    Date of Patent: November 28, 2006
    Assignee: 3M ESPE AG
    Inventors: Reinhold Hecht, Günther Lechner, Thomas Lehmann, Gunther Eckhardt, Bernd Gangnus
  • Publication number: 20060106127
    Abstract: The invention relates to preparations based on aziridino polymers and comprising monofunctional aziridines and to the use thereof in producing dental materials, especially impression materials.
    Type: Application
    Filed: August 4, 2003
    Publication date: May 18, 2006
    Inventors: Thomas Klettke, Cornelia Fuhrer, Adrian Eckert, Gunther Eckhardt, Erich Wanek
  • Patent number: 6919386
    Abstract: The invention relates to preparations, containing (A) 30 to 56 wt.-% aziridino polyethers with a cyclic polyether content lower than 5.0 wt.-%; (B) 30 to 45 wt.-% compounds which effect a softening of the cured dental materials; (C) 10 to 15 wt.-% filler; (D) 4 to 10 wt.-% further active ingredients; with the provisos that the weight ratio between constituents (A) and (C) to the compounds of constituent (B) is 1.2 to 2.1; constituent (B) consists of compounds with molar masses lower than 500 g/mol (B1) and of trisacylesters of glycerol of non-animal origin with molar masses between 500 to 2000 g/mol (B2) as well as of compounds with molar masses greater than 2000 g/mol (B3) and the weight ratio between (B1) and (B3) is 1:0.8 to 1:2.3, as well as their use.
    Type: Grant
    Filed: January 15, 2001
    Date of Patent: July 19, 2005
    Assignee: 3M ESPE AG
    Inventors: Erich Wanek, Gunther Eckhardt, Peter Roas
  • Patent number: 6906117
    Abstract: 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 is
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: June 14, 2005
    Assignee: 3M Espe AG
    Inventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
  • Patent number: 6894144
    Abstract: The invention relates to elastomer materials based on N-alkylaziridino compounds with a base component which contains the aziridino compounds and with a catalyst component which contains at least one acid-acting compound, both components being mixed before use, characterized in that, as acid-acting compound of the catalyst component, one or more boric acid complexes are used which can be obtained by reaction of boric acid and/or a boric acid derivative with at least one OH-functional compound, the OH functions being able to be present wholly or partly protected, and this reaction being carried out either as an upstream reaction between boric acid and/or a boric acid derivative and at least one such OH-functional compound or during or after the preparation of the catalyst component or by mixing the catalyst component with the base component which then contains at least one OH-functional compound.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 17, 2005
    Assignee: 3M Espe AG
    Inventors: Joachim Zech, Gunther Eckhardt, Cornelia Führer, Bernd Gangnus, Andreas Rombach, Oswald Gasser, Thomas Klettke, Erich Wanek
  • Patent number: 6867246
    Abstract: 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 chai
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: March 15, 2005
    Assignee: 3M Espe AG
    Inventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
  • Patent number: 6852795
    Abstract: The invention relates to monomers according to the formulae: as well as curable materials containing these monomers.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: February 8, 2005
    Assignee: 3M ESPE AG
    Inventors: Peter Bissinger, Gunther Eckhardt, Wolfgang Weinmann
  • Publication number: 20040254260
    Abstract: 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: Application
    Filed: December 22, 2003
    Publication date: December 16, 2004
    Inventors: Markus Mikulla, Gunther Lechner, Klaus-Peter Stefan, Gabrielle Rackelmann, Gunther Eckhardt
  • Publication number: 20040149164
    Abstract: 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, saturate
    Type: Application
    Filed: November 26, 2003
    Publication date: August 5, 2004
    Inventors: Gunther Eckhardt, Guenther Lechner, Erich Wanek
  • Patent number: 6715645
    Abstract: The invention relates to a mixing capsule, especially for producing dental materials. The inventive capsule is provided with a cartridge which is closed on one end thereof by means of a piston. A hemispherical cavity is configured in the piston. Said cavity forms an additional chamber and is closed in relation to the main chamber of the cartridge by means of a separating device. A body that is present in the main chamber in the initial state serves for supporting the mixing process and for chopping through the separating device at the beginning of the mixing process in such a way that the main chamber and the additional chamber form a coherent mixing chamber. The body enters the hemispherical additional chamber and acts as a displacing body at the end of the output process. The mixing capsule is provided with a coding.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: April 6, 2004
    Assignee: 3M ESPE AG
    Inventors: Marc Peuker, Michael Sick, Klaus-Peter Stefan, Gabriele Hager, Angela Stenger, Gunther Eckhardt
  • Publication number: 20040014924
    Abstract: 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: Application
    Filed: June 4, 2003
    Publication date: January 22, 2004
    Inventors: Reinhold Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
  • Publication number: 20040014907
    Abstract: 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;-radical
    Type: Application
    Filed: July 8, 2003
    Publication date: January 22, 2004
    Inventors: Reinhard Nowak, Joachim Zech, Peter Bissinger, Erich Wanek, Gunther Eckhardt, Guenther Lechner
  • Patent number: 6652281
    Abstract: Dental materials containing monomers and/or prepolymers can be subjected to a polymer-forming reaction. The dental materials comprise at least one initiating system and optionally comprise fillers, colorants, flow modifiers, stabilizers, ion-releasing substances as well as compounds which increase X-ray capacity or other modifiers. The dental materials are characterized in that the initiating system is proportioned such that the dental materials are sufficiently capable of flowing for at least 10 seconds after exposure to oxygen, whereupon they subsequently harden into a solid material.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: November 25, 2003
    Assignee: 3M ESPE AG
    Inventors: Gunther Eckhardt, Thomas Luchterhandt, Thomas Klettke
  • Patent number: 6624236
    Abstract: The invention relates to polysiloxanes from cross-linkable monomers based on cyclosiloxanes and their use in polymerizable compositions. The invention relates in particular to polysiloxanes from sol-gel-condensable cyclosiloxane(meth)acrylates as well as resinous compositions, obtainable by hydrolytic condensation of one or more hydrolyzable and condensable cyclosiloxane(meth)acrylates.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: September 23, 2003
    Assignee: 3M Espe AG
    Inventors: Peter Bissinger, Oswald Gasser, Rainer Guggenberger, Wolfgang Soglowek, Gunther Eckhardt
  • Publication number: 20030166816
    Abstract: The invention relates to monomers according to the formulae 1
    Type: Application
    Filed: November 25, 2002
    Publication date: September 4, 2003
    Inventors: Peter Bissinger, Gunther Eckhardt, Wolfgang Weinmann