Patents by Inventor Krishna Uibel
Krishna Uibel 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: 10526250Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: GrantFiled: November 27, 2018Date of Patent: January 7, 2020Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Martin Engler, Krishna Uibel, Jens Eichler
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Publication number: 20190092694Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: ApplicationFiled: November 27, 2018Publication date: March 28, 2019Inventors: Martin ENGLER, Krishna UIBEL, Jens EICHLER
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Patent number: 10173931Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: GrantFiled: July 21, 2016Date of Patent: January 8, 2019Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Martin Engler, Krishna Uibel, Jens Eichler
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Patent number: 9625213Abstract: The invention relates to a shaped body comprising a substrate with a firmly adhering separating layer, wherein the separating layer comprises 92-98 wt. % silicon nitride (Si3N4) and 2-8 wt. % silicon dioxide (SiO2) and wherein the separating layer has a total oxygen content of ?8 wt. % and a hardness of at least 10 HB 2.5/3 according to DIN EN ISO 6506-1.Type: GrantFiled: August 2, 2012Date of Patent: April 18, 2017Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Krishna Uibel, David W. Worthey
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Publication number: 20160326063Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: ApplicationFiled: July 21, 2016Publication date: November 10, 2016Inventors: Martin ENGLER, Krishna UIBEL, Jens EICHLER
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Patent number: 9422200Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: GrantFiled: December 9, 2010Date of Patent: August 23, 2016Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Martin Engler, Krishna Uibel, Jens Eichler
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Publication number: 20160145411Abstract: The invention relates to a component part produced from a polymer/boron nitride compound, wherein the polymer/boron nitride compound comprises at least one polymer material, at least one thermally conductive filler, and at least one reinforcing filler, and wherein the at least one thermally conductive filler comprises boron nitride agglomerates. The invention further relates to a polymer/boron nitride compound for producing such a component part. The invention further relates to the use of such a component part for thermal conduction to control the temperature of component parts or assemblies, preferably electronic component parts or assemblies.Type: ApplicationFiled: June 18, 2014Publication date: May 26, 2016Applicants: 3M Innovative Properties Company, Robert Bosch GmbHInventors: Krishna UIBEL, Armin KAYSER, Johanna ZIMMERMANN, Ilonka MAIER, Dirk SCHMIEDERER, Maximilian BADER
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Publication number: 20160122502Abstract: The invention relates to a component part produced by thermoplastic processing, having a wall thickness of at most 3 mm on at least one part of the component part, wherein the component part comprises a thermoplastically processable polymer material and a thermally conductive filler, wherein the filler comprises boron nitride agglomerates. The invention furthermore relates to a polymer/boron nitride compound for producing such a component part. The invention furthermore relates to the use of such a component part for heat dissipation from component parts or assemblies to be cooled.Type: ApplicationFiled: June 18, 2014Publication date: May 5, 2016Inventors: Krishna Uibel, Armin Kayser, Johanna Zimmermann
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Patent number: 8979995Abstract: The invention relates to a suspension for producing a friction-increasing layer on a substrate, which comprises a liquid suspension medium, a predominantly inorganic binder or precursor compounds thereof and suspended hard material particles. The invention further relates to a shaped body comprising a substrate and a friction-increasing layer which has been applied to at least part of the surface of the substrate and comprises a predominantly inorganic binder matrix and hard material particles embedded therein, where the thickness of the binder matrix is less than the average particle size of the hard material particles so that the hard material particles project from the binder matrix and where the friction-increasing layer has been formed from a suspension according to the invention. The invention likewise relates to a process for producing the abovementioned shaped bodies and also their use for producing press or clamp connections and also as securing element.Type: GrantFiled: May 26, 2010Date of Patent: March 17, 2015Assignee: 3M Innovative Properties CompanyInventors: Jürgen Meyer, Timo Sörgel, Krishna Uibel, Sven Schreiner
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Publication number: 20140272748Abstract: The invention relates to a shaped body comprising a substrate with a firmly adhering separating layer, wherein the separating layer comprises 92-98 wt. % silicon nitride (Si3N4) and 2-8 wt. % silicon dioxide (SiO2) and wherein the separating layer has a total oxygen content of ?8 wt. % and a hardness of at least 10 HB 2.5/3 according to DIN EN ISO 6506-1. The invention further relates to a process for producing such a shaped body, a coating suspension for use in such a process and the use of a shaped body according to the invention in the field of corrosive nonferrous metal melts.Type: ApplicationFiled: August 2, 2012Publication date: September 18, 2014Applicant: ESK CERAMICS GMBH & CO. KGInventors: Krishna Uibel, David W. Worthey
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Patent number: 8409655Abstract: A process for producing three-dimensional shaped ceramic bodies by layerwise printing of a suspension comprising the constituents required for formation of the shaped ceramic bodies by means of an inkjet printer in the desired two-dimensional shape onto a support material, drying and hardening of the layer composite formed, which is characterized in that printing is effected using a suspension comprising from 50 to 80% by weight of ceramic particles in a dispersion medium comprising an aqueous boehmite sol, at least one low molecular weight alcohol, at least one drying inhibitor and at least one organic fluidizer, and also an apparatus for carrying out this process are described.Type: GrantFiled: March 27, 2007Date of Patent: April 2, 2013Inventors: Krishna Uibel, Rainer Telle, Horst Fischer
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Patent number: 8231705Abstract: The invention relates to a slip for producing a durable, firmly adhering release layer on a substrate, comprising a suspension of solid particles, wherein the solid particles comprise 67-95% by weight of silicon nitride and 5-33% by weight of an SiO2-based high-temperature binder and the SiO2-based high-temperature binder is derived from SiO2 precursors and has been pretreated by heat treatment in a temperature range of 300-1300° C. The invention further provides shaped bodies comprising a substrate having a durable, firmly adhering release layer and also processes for producing them. The shaped bodies of the invention are suitable for use in the field of corrosive nonferrous metal melts.Type: GrantFiled: December 6, 2007Date of Patent: July 31, 2012Assignee: ESK Ceramics GmbH & Co. KGInventor: Krishna Uibel
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Publication number: 20120118203Abstract: The invention relates to a suspension for producing a friction-increasing layer on a substrate, which comprises a liquid suspension medium, a predominantly inorganic binder or precursor compounds thereof and suspended hard material particles. The invention further relates to a shaped body comprising a substrate and a friction-increasing layer which has been applied to at least part of the surface of the substrate and comprises a predominantly inorganic binder matrix and hard material particles embedded therein, where the thickness of the binder matrix is less than the average particle size of the hard material particles so that the hard material particles project from the binder matrix and where the friction-increasing layer has been formed from a suspension according to the invention. The invention likewise relates to a process for producing the abovementioned shaped bodies and also their use for producing press or clamp connections and also as securing element.Type: ApplicationFiled: May 26, 2010Publication date: May 17, 2012Applicant: ESK CERAMICS GMBH & CO. KGInventors: Jürgen Meyer, Timo Sörgel, Krishna Uibel, Sven Schreiner
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Publication number: 20120114905Abstract: The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped. The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation. The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.Type: ApplicationFiled: December 9, 2010Publication date: May 10, 2012Applicant: ESK CERAMICS GMBH & CO. KGInventors: Martin ENGLER, Krishna UIBEL, Jens EICHLER
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Patent number: 8128864Abstract: The invention relates to a water-containing slip for producing a BN-containing coating on a substrate, which comprises, based on the solids content of the slip, a) 45-90% by weight of BN, b) 3-25% by weight of boehmite nanoparticles, c) 0.5-5% by weight of at least one borate, d) 2-30% by weight of at least one water-insoluble boron compound which is different from the components a) and c), e) 2-30% by weight of an organic compound, where the solids content of the slip is 15-60% by weight.Type: GrantFiled: August 13, 2007Date of Patent: March 6, 2012Assignee: ESK Ceramics GmbH & Co. KGInventors: Martin Engler, Krishna Uibel
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Patent number: 8012252Abstract: The invention relates to a slip for producing a durable hard coating on a substrate, comprising a) silicon nitride particles and b) a binder comprising nanosize solid particles and/or precursors of nanosize solid particles from production via a sol-gel process. The invention further relates to shaped bodies composed of a substrate with a durable hard coating which has been produced from a slip according to the invention. The shaped bodies of the invention are suitable for use in the field of corrosive nonferrous metal melts.Type: GrantFiled: October 18, 2006Date of Patent: September 6, 2011Assignee: ESK CERAMICS GmbH & Co., KGInventors: Martin Engler, Christoph Lesniak, Krishna Uibel
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Publication number: 20100040767Abstract: A process for producing three-dimensional shaped ceramic bodies by layerwise printing of a suspension comprising the constituents required for formation of the shaped ceramic bodies by means of an inkjet printer in the desired two-dimensional shape onto a support material, drying and hardening of the layer composite formed, which is characterized in that printing is effected using a suspension comprising from 50 to 80% by weight of ceramic particles in a dispersion medium comprising an aqueous boehmite sol, at least one low molecular weight alcohol, at least one drying inhibitor and at least one organic fluidizer, and also an apparatus for carrying out this process are described.Type: ApplicationFiled: March 27, 2007Publication date: February 18, 2010Applicants: Horst FISCHER, Rainer TELLE, Emre OEZKOLInventors: Krishna Uibel, Rainer Telle, Horst Fischer
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Publication number: 20090236780Abstract: The invention relates to a water-containing slip for producing a BN-containing coating on a substrate, which comprises, based on the solids content of the slip, a) 45-90% by weight of BN, b) 3-25% by weight of boehmite nanoparticles, c) 0.5-5% by weight of at least one borate, d) 2-30% by weight of at least one water-insoluble boron compound which is different from the components a) and c), e) 2-30% by weight of an organic compound, where the solids content of the slip is 15-60% by weight. The slip according to the invention is suitable for producing self-healing and hot-flexible coatings which are outstandingly suitable for foundry applications.Type: ApplicationFiled: August 13, 2007Publication date: September 24, 2009Applicant: ESK CERAMICS GMBH & CO., KGInventors: Martin Engler, Krishna Uibel
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Publication number: 20090119882Abstract: The invention relates to a slip for producing a durable, firmly adhering release layer on a substrate, comprising a suspension of solid particles, wherein the solid particles comprise 67-95% by weight of silicon nitride and 5-33% by weight of an SiO2-based high-temperature binder and the SiO2-based high-temperature binder is derived from SiO2 precursors and has been pretreated by heat treatment in a temperature range of 300-1300° C. The invention further provides shaped bodies comprising a substrate having a durable, firmly adhering release layer and also processes for producing them. The shaped bodies of the invention are suitable for use in the field of corrosive nonferrous metal melts.Type: ApplicationFiled: December 6, 2007Publication date: May 14, 2009Inventor: Krishna Uibel
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Publication number: 20070089642Abstract: The invention relates to a slip for producing a durable hard coating on a substrate, comprising a) silicon nitride particles and b) a binder comprising nanosize solid particles and/or precursors of nanosize solid particles from production via a sol-gel process. The invention further relates to shaped bodies composed of a substrate with a durable hard coating which has been produced from a slip according to the invention. The shaped bodies of the invention are suitable for use in the field of corrosive nonferrous metal melts.Type: ApplicationFiled: October 18, 2006Publication date: April 26, 2007Applicant: ESK CERAMICS GMBH & CO. KGInventors: Martin Engler, Christoph Lesniak, Krishna Uibel