Patents by Inventor Thomas Klettke
Thomas Klettke 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: 10195120Abstract: The invention relates to a curable dental retraction composition comprising alginate and a solvent, with the proviso that essentially no crosslinker in an amount effective to start setting of the curable dental retraction composition is present. The invention also relates to a container containing said composition and to a kit comprising two parts, wherein the first part comprises the curable dental retraction composition of the present invention and the second part comprises a crosslinker being able to start setting of the dental retraction composition.Type: GrantFiled: September 9, 2008Date of Patent: February 5, 2019Assignee: 3M Innovative Properties CompanyInventors: Ruediger Hampe, Thomas Klettke, Andreas R. Maurer, Christoph Schulte
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Publication number: 20160000524Abstract: The invention is related to a process for producing a dental restoration, the process comprising the steps: —shape a dental restoration out of a shapeable material being placed on a dental situation to be restored in the mouth of a patient, —make an impression of the shaped dental restoration placed on the dental situation to be restored by using a dental impression material, —remove the dental impression material and the shaped dental restoration from the dental situation in the mouth of a patient, —place a curable dental composition in the negative mould of the dental impression material relating to the dental situation to be restored. The invention is also directed to a kit of parts comprising a shapeable material, a curable dental composition, optionally a dental cement, optionally a dental impression material, instruction for use.Type: ApplicationFiled: February 27, 2014Publication date: January 7, 2016Inventors: REINHOLD HECHT, UWE H. HOHEISEL, JOHN W. DUBBE, BERNHARD HOFMANN, THOMAS KLETTKE, OLIVER KAPPLER
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Patent number: 9216141Abstract: The present disclosure relates to a curable composition to be prepared by mixing a base paste and a catalyst paste, the base paste comprising (A) a hardenable compound comprising at least two aziridine moieties, and (B) a metal containing component containing anions and/or ligands, the metal containing component being present in an amount of about 0.1 to about 5 wt.-%, the metal being selected from Zn, Cu, Co, Ni, Ag and combinations thereof, the anions or ligands being selected from oxide, hydroxyl, (hydro)carbonate, sulphate, nitrate, halide, lactate, benzoate, wolframate, linear or branched aliphatic carboxylic acid anions, ligands having not more than two coordinating moieties and combinations thereof, the catalyst paste comprising (C) a Lewis acid, the composition optionally further comprising (D) a retarder, (E) filler and (F) additive(s). The present disclosure also relates to a kit of parts, the use of a metal containing component and a method of taking a dental impression.Type: GrantFiled: August 23, 2011Date of Patent: December 22, 2015Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Joachim W. Zech, Hendrik Grupp, Thomas Klettke
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Publication number: 20150079543Abstract: The invention relates to a hardenable dental composition comprising component (A) comprising a cationically hardenable compound, component (B) comprising an initiator being able to initiate the hardening reaction of the cationically hardenable compound, and component (C) comprising a filler, wherein the filler comprises a filler body and a filler surface, the filler surface comprising side groups with polar moieties. The invention also relates to a process of producing the dental composition, to the use of the dental composition as dental impression material and to a method of taking an impression of dental tissue.Type: ApplicationFiled: November 19, 2014Publication date: March 19, 2015Inventors: JOACHIM W. ZECH, THOMAS KLETTKE, SABASTIAN ZELLER, BERND KUPPERMANN, HENDRIK GRUPP
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Patent number: 8933147Abstract: The invention relates to plastics which are self-disinfecting. The invention relates in particular to polyether or silicone based dental plastics and impression materials in which a biocidal material is incorporated. The dental impression material ace. to the invention comprises at least a polymerizable base paste BP and a non-aqueous catalyst paste CP, wherein the base paste BP comprises about 0.001 to about 10% by weight of a water-stable anti-microbial agent. Preferred anti-microbial agents are selected from the group consisting of Hexitidin, Cetypyridininumcloride (CPC), Chlorhexidine and its derivates (CHX) and Triclosan.Type: GrantFiled: November 9, 2006Date of Patent: January 13, 2015Assignee: 3M Innovative Properties CompanyInventors: Thomas Klettke, Oliver Kappler, Ingo R. Haeberlein
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Patent number: 8921475Abstract: The invention relates to a hardenable dental composition comprising component (A) comprising a cationically hardenable compound, component (B) comprising an initiator being able to initiate the hardening reaction of the cationically hardenable compound, and component (C) comprising a filler, wherein the filler comprises a filler body and a filler surface, the filler surface comprising side groups with polar moieties. The invention also relates to a process of producing the dental composition, to the use of the dental composition as dental impression material and to a method of taking an impression of dental tissue.Type: GrantFiled: July 19, 2010Date of Patent: December 30, 2014Assignee: 3M Innovative Properties CompanyInventors: Joachim W. Zech, Thomas Klettke, Sebastian Zeller, Bernd Kuppermann, Hendrik Grupp
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Patent number: 8672678Abstract: A nozzle head (5) for a powder jet device (1), for use in applying dental material, comprises a first fluid flow path (8) for delivering a powder/fluid mixture to a first discharge nozzle (8A). A second fluid flow path (6) is provided for delivering a liquid to a second discharge nozzle (6A) located adjacent the first discharge nozzle (8A), so that the materials discharged by the first and second discharge nozzles combine at a desired location to form a dental composition. A nozzle-clearing member (10) is located inside the nozzle head and is movable to remove powder material from the first discharge nozzle when the flow of powder/fluid mixture to the nozzle ceases.Type: GrantFiled: May 28, 2009Date of Patent: March 18, 2014Assignee: 3M Innovative Properties CompanyInventors: Jens Gramann, Ruediger Hampe, Thomas Klettke, Ingo R. Haeberlein, Christoph Schulte, Andreas R. Maurer, Martin Goetzinger, Sebastian Guggenmos
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Patent number: 8487016Abstract: The invention relates to a dental impression material containing a rheological modifier. The rheological modifier is in particular useful for adjusting shear-thinning properties of non-water based dental impression materials, especially of precision impression materials. It further relates to a method for producing a dental impression material.Type: GrantFiled: December 17, 2008Date of Patent: July 16, 2013Assignee: 3M Innovative Properties CompanyInventors: Sebastian Zeller, Thomas Klettke, Peter Bissinger
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Publication number: 20130157226Abstract: The present disclosure relates to a curable composition to be prepared by mixing a base paste and a catalyst paste, the base paste comprising (A) a hardenable compound comprising at least two aziridine moieties, and (B) a metal containing component containing anions and/or ligands, the metal containing component being present in an amount of about 0.1 to about 5 wt.-%, the metal being selected from Zn, Cu, Co, Ni, Ag and combinations thereof, the anions or ligands being selected from oxide, hydroxyl, (hydro)carbonate, sulphate, nitrate, halide, lactate, benzoate, wolframate, linear or branched aliphatic carboxylic acid anions, ligands having not more than two coordinating moieties and combinations thereof, the catalyst paste comprising (C) a Lewis acid, the composition optionally further comprising (D) a retarder, (E) filler and (F) additive(s).Type: ApplicationFiled: August 23, 2011Publication date: June 20, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Joachim W. Zech, Hendrik Grupp, Thomas Klettke
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Patent number: 8382476Abstract: The invention relates to a dental composition comprising a hardenable powder to be used in a process for retraction of dental tissue. The invention also relates to a kit of parts comprising the dental composition comprising a hardenable powder, a hardening agent, optionally a handpiece of a powder jet device, optionally a powder jet device, and optionally retraction caps. In a further aspect, the invention relates to a method for retracting dental tissue comprising the steps of applying a dental composition comprising a hardenable powder with a powder jet device into the sulcus between soft and hard dental tissue, applying a composition comprising a hardening agent either before or after the previous step, leaving the dental composition in the sulcus for a time sufficient to effect retraction of the soft dental tissue and removing the dental composition from the sulcus.Type: GrantFiled: December 9, 2008Date of Patent: February 26, 2013Assignee: 3M Innovative Properties CompanyInventors: Christoph Schulte, Andreas R. Maurer, Thomas Klettke, Ruediger Hampe, Ingo R. Haeberlein
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Publication number: 20120187017Abstract: The invention relates to a hardenable dental composition comprising component (A) comprising a cationically hardenable compound, component (B) comprising an initiator being able to initiate the hardening reaction of the cationically hardenable compound, and component (C) comprising a filler, wherein the filler comprises a filler body and a filler surface, the filler surface comprising side groups with polar moieties. The invention also relates to a process of producing the dental composition, to the use of the dental composition as dental impression material and to a method of taking an impression of dental tissue.Type: ApplicationFiled: July 19, 2010Publication date: July 26, 2012Inventors: Joachim W. Zech, Thomas Klettke, Sebastian Zeller, Bernd Kuppermann, Hendrik Grupp
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Patent number: 8142562Abstract: The invention relates to a curable dental retraction composition for reacting gingiva from a prepared tooth structure. The composition comprises an alginate, a di- and/or trivalent ion source, water, a retarder and a filler.Type: GrantFiled: August 2, 2007Date of Patent: March 27, 2012Assignee: 3M Innovative Properties CompanyInventors: Thomas Klettke, Ruediger Hampe
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Publication number: 20110257290Abstract: The invention relates to a dental impression material containing a theological modifier. The rheological modifier is in particular useful for adjusting shear-thinning properties of non-water based dental impression materials, especially of precision impression materials. It further relates to a method for producing a dental impression material.Type: ApplicationFiled: December 17, 2008Publication date: October 20, 2011Inventors: Sebastian Zeller, Thomas Klettke, Peter Bissinger
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Publication number: 20110229849Abstract: The invention relates to dental retraction device having the shape of a yarn comprising twisted staple fibers, the twisted staple fibers comprising an alginate containing component, wherein the length of the staple fibers is in a range of about 10 to about 200 mm and/or wherein the staple fiber fineness is at least about 1 dtex. The invention also relates to a method for producing such a device as well as the use of this device in a process for retracting dental tissue.Type: ApplicationFiled: September 25, 2009Publication date: September 22, 2011Inventors: Andreas R. Maurer, Rudi Grutz, Thomas Klettke, Robert F. Peez, Rüdiger Hampe, Schulte Christoph
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Patent number: 8022113Abstract: The invention relates to a composition comprising a prepolymer as component (A), wherein the prepolymer comprises aziridino groups and is characterized by an equivalent weight EW1, a crosslinker as component (B), wherein the crosslinker has a structure being different from the structure of the prepolymer and comprises aziridino groups and is characterized by an equivalent weight EW2, an initiator as component (C) being able to start curing of the composition, optionally filler(s) as component (D) and optionally additive(s) as component (E), wherein equivalent weight is defined as (molecular mass of the molecule)/(number of aziridino groups present in the molecule) and wherein EW1>EW2. The invention also relates to the use of the composition for coating, sealing, moulding, adhering, making impressions, producing a dental material.Type: GrantFiled: February 8, 2007Date of Patent: September 20, 2011Assignee: 3M Innovative Properties CompanyInventors: Thomas Klettke, Cornelia B. Fuehrer, Peter Bissinger
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Patent number: 8017666Abstract: The invention relates to a composition comprising a prepolymer as component (A), wherein the prepolymer comprises aziridino groups and is characterized by an equivalent weight EW1, a crosslinker as component (B), wherein the crosslinker has a structure being different from the structure of the prepolymer and comprises at least three 2-alkyl-substituted aziridino groups and is characterized by an equivalent weight EW2, an initiator as component (C) being able to start curing of the composition, optionally filler(s) as component (D) and optionally additive(s) as component (E), wherein equivalent weight is defined as (molecular mass of the molecule)/(number of aziridino groups present in the molecule) and wherein EW1>EW2. The invention also relates to the use of the composition for coating, sealing, molding, adhering, making impressions, producing a dental material.Type: GrantFiled: May 31, 2007Date of Patent: September 13, 2011Assignee: 3M Innovative Properties CompanyInventors: Peter Bissinger, Thomas Klettke, Cornelia B. Fuehrer
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Patent number: 8007579Abstract: The invention relates to preparations based on polymerizable polyether materials and a fluidity improver and to the use thereof in producing dental materials, especially impression materials.Type: GrantFiled: July 24, 2007Date of Patent: August 30, 2011Assignee: 3M Innovative Properties CompanyInventors: Thomas Klettke, Bernd Kuppermann, Hendrik M. Grupp
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Patent number: 7947757Abstract: The invention relates to an initiator comprising at least one structural element characterized by the following formula (I) wherein X? is a non or low coordinating anion, R1, R2, R3, R4 are independently linear, cyclic or branched C1-C20 alkyl or alkylene groups, wherein one or more of the methylene groups contained in the alkyl or alkylene group can be substituted by —CO—, —CONH—, —CON(CH3)—, —S— and/or —O—, and wherein R1, R2, R3 and/or R4 can act as a bridging element connecting two or more structural elements. The invention is also related to a process of producing the initiator and to a curable composition comprising the initiator, a process for producing the curable composition a kit comprising a cationically curable composition and the inventive initiator and the use of the initiator or the curable composition comprising the initiator for various applications, especially in the dental field.Type: GrantFiled: July 27, 2006Date of Patent: May 24, 2011Assignee: 3M Innovative Properties CompanyInventors: Thomas Klettke, Cornelia B. Fuehrer, Andrea Hailand, Markus Mikulla
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Patent number: D669170Type: GrantFiled: September 28, 2011Date of Patent: October 16, 2012Assignee: 3M Innovative Properties CompanyInventors: Andreas J. Boehm, Thomas Klettke
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Patent number: D679810Type: GrantFiled: September 28, 2011Date of Patent: April 9, 2013Assignee: 3M Innovative Properties CompanyInventors: Andreas J. Boehm, Thomas Klettke