Patents by Inventor Viktor Vejins
Viktor Vejins 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: 11450446Abstract: A multi-layered, transparent-conductive stack with improved mechanical robustness, and a method of making the same, is described. The multi-layered film includes a layer of a hybrid film and a layer of a transparent conductive oxide (TCO) coating that is sputter deposited and forms a contact with the hybrid film. The hybrid film includes an interconnected network of carbon nanotubes (CNTs) and a plurality of metal oxide nanoparticles (MONs). The plurality of MONs are randomly distributed in the interconnected network of CNTs forming an electrical contact with the CNTs.Type: GrantFiled: May 5, 2015Date of Patent: September 20, 2022Assignee: NANO-C, INC.Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Publication number: 20210039987Abstract: Interlaced random networks of heterogeneous, rigid rod like particles such as metallic nanowires and carbon nanotubes are formed by various methods. The resulting combination provides characteristics that are unique and not attainable by either of the individual components on their own. In one of the embodiments, such heterogeneous networks are continuously formed on a master hot roller surface by application of the rigid rod components from separate sources and the post formed network is transferred fully or partially onto a receptor surface of a moving web directly in-contact with the master surface. In another embodiment the heterogeneous networks are formed on the said master surface or hot roller by applying formulations that are co-stabilized dispersions of heterogeneous, rigid rod like particles in a common solvent. In yet another embodiment, such heterogeneous networks are formed by contacting the receptor surface with more than one such master surface or hot roller.Type: ApplicationFiled: January 23, 2019Publication date: February 11, 2021Inventors: Ramesh SIVARAJAN, Melissa J. RICCI, Colleen E. TREACY, Viktor VEJINS
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Publication number: 20190322818Abstract: A method for preparing a “preblend” of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: ApplicationFiled: June 4, 2019Publication date: October 24, 2019Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Patent number: 10308773Abstract: A method for preparing a “preblend” of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: GrantFiled: April 9, 2018Date of Patent: June 4, 2019Assignee: Gates CorporationInventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Publication number: 20180223052Abstract: A method for preparing a “preblend” of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: ApplicationFiled: April 9, 2018Publication date: August 9, 2018Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Patent number: 10023755Abstract: In accordance with some embodiments, compositions and methods for forming solvent-based and water-based carbon nanotubes inks with removable additives are provided. In some embodiments, an ink composition is provided that includes a plurality of carbon nanotubes, a solvent, and a triazole-based removable additive, where the plurality of carbon nanotubes are dispersed within the solvent and wherein the triazole-based removable additive stabilizes the plurality of carbon nanotubes that are dispersed in the solvent.Type: GrantFiled: March 28, 2016Date of Patent: July 17, 2018Assignee: NANO-C, INC.Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Publication number: 20180144844Abstract: A multi-layered, transparent-conductive stack with improved mechanical robustness, and a method of making the same, is described. The multi-layered film includes a layer of a hybrid film and a layer of a transparent conductive oxide (TCO) coating that is sputter deposited and forms a contact with the hybrid film. The hybrid film includes an interconnected network of carbon nanotubes (CNTs) and a plurality of metal oxide nanoparticles (MONs). The plurality of MONs are randomly distributed in the interconnected network of CNTs forming an electrical contact with the CNTs.Type: ApplicationFiled: May 5, 2015Publication date: May 24, 2018Inventors: Ramesh SIVARAJAN, Henning RICHTER, Viktor VEJINS
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Patent number: 9938383Abstract: A method for preparing a “preblend” of nano-structured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nano-structured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-wall nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: GrantFiled: January 23, 2017Date of Patent: April 10, 2018Assignee: Gates CorporationInventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Publication number: 20170130010Abstract: A method for preparing a “preblend” of nano-structured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nano-structured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-wall nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: ApplicationFiled: January 23, 2017Publication date: May 11, 2017Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Patent number: 9550907Abstract: A method for preparing a “preblend” of nano-structured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nano-structured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-wall nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: GrantFiled: February 27, 2015Date of Patent: January 24, 2017Assignee: Gates CorporationInventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Patent number: 9472765Abstract: Photovoltaic cells comprising an active layer comprising, as p-type material, conjugated polymers such as polythiophene and regioregular polythiophene, and as n-type material at least one fullerene derivative. The fullerene derivative can be C60, C70, or C84. The fullerene also can be functionalized with indene groups. Improved efficiency can be achieved.Type: GrantFiled: February 19, 2014Date of Patent: October 18, 2016Assignees: SOLVAY USA INC., NANO-C, INC.Inventors: Darin W. Laird, Reza Stegamat, Henning Richter, Viktor Vejins, Lawrence T. Scott, Thomas A. Lada
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Publication number: 20160257833Abstract: In accordance with some embodiments, compositions and methods for forming solvent-based and water-based carbon nanotubes inks with removable additives are provided. In some embodiments, an ink composition is provided that includes a plurality of carbon nanotubes, a solvent, and a triazole-based removable additive, where the plurality of carbon nanotubes are dispersed within the solvent and wherein the triazole-based removable additive stabilizes the plurality of carbon nanotubes that are dispersed in the solvent.Type: ApplicationFiled: March 28, 2016Publication date: September 8, 2016Inventors: Ramesh SIVARAJAN, Henning RICHTER, Viktor VEJINS
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Publication number: 20160251534Abstract: A method for preparing a “preblend” of nano-structured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nano-structured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-wall nanotubes in ethylene-?-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.Type: ApplicationFiled: February 27, 2015Publication date: September 1, 2016Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
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Patent number: 9340697Abstract: In accordance with some embodiments, compositions and methods for forming solvent-based and water-based carbon nanotubes inks with removable additives are provided. In some embodiments, an ink composition is provided that includes a plurality of carbon nanotubes, a solvent, and a triazole-based removable additive, where the plurality of carbon nanotubes are dispersed within the solvent and wherein the triazole-based removable additive stabilizes the plurality of carbon nanotubes that are dispersed in the solvent.Type: GrantFiled: December 21, 2012Date of Patent: May 17, 2016Assignee: NANO-C, INC.Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Patent number: 9296912Abstract: In accordance with some embodiments, compositions and methods for forming solvent-based and water-based carbon nanotubes inks with removable additives are provided. In some embodiments, the ink composition comprises one or more carbon nanotubes, a solvent, and a removable additive, which may function as a stabilizing agent, a viscosity adjustment agent, or any suitable combination thereof. The removable additive may be removed from articles derived from the ink composition by means of thermal annealing.Type: GrantFiled: August 12, 2010Date of Patent: March 29, 2016Assignee: NANO-C, INC.Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Patent number: 9219166Abstract: Embodiments of tunneling barriers and methods for same can embed molecules exhibiting a monodispersion characteristic into a dielectric layer (e.g., between first and second layers forming a dielectric layer). In one embodiment, by embedding C60 molecules inbetween first and second insulating layers forming a dielectric layer, a field sensitive tunneling barrier can be implemented. In one embodiment, the tunneling barrier can be between a floating gate and a channel in a semiconductor structure. In one embodiment, a tunneling film can be used in nonvolatile memory applications where C60 provides accessible energy levels to prompt resonant tunneling through the dielectric layer upon voltage application. Embodiments also contemplate engineered fullerene molecules incorporated within the context of at least one of a tunneling dielectric and a floating gate within a nonvolatile flash memory structure.Type: GrantFiled: December 23, 2013Date of Patent: December 22, 2015Assignee: CORNELL UNIVERSITYInventors: Edwin C. Kan, Qianying Xu, Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Patent number: 9214256Abstract: An optically transparent, electrically conductive hybrid film includes a carbon nanotubes network deposited on a substrate, and a population of transparent conductive inorganic nanoparticles distributed throughout the carbon nanotubes network to provide a conductive transparent hybrid film.Type: GrantFiled: March 16, 2009Date of Patent: December 15, 2015Assignee: Nano-C, Inc.Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
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Publication number: 20140251434Abstract: Photovoltaic cells comprising an active layer comprising, as p-type material, conjugated polymers such as polythiophene and regioregular polythiophene, and as n-type material at least one fullerene derivative. The fullerene derivative can be C60, C70, or C84. The fullerene also can be functionalized with indene groups. Improved efficiency can be achieved.Type: ApplicationFiled: February 19, 2014Publication date: September 11, 2014Applicants: Plextronics, Inc., Nano-C, Inc.Inventors: Darin W. LAIRD, Reza STEGAMAT, Henning RICHTER, Viktor VEJINS, Lawrence T. SCOTT, Thomas A. LADA, II
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Patent number: 8815124Abstract: Photovoltaic cells comprising an active layer comprising, as p-type material, conjugated polymers such as polythiophene and regioregular polythiophene, and as n-type material at least one fullerene derivative. The fullerene derivative can be C60, C70, or C84. The fullerene also can be functionalized with indene groups. Improved efficiency can be achieved.Type: GrantFiled: February 29, 2008Date of Patent: August 26, 2014Assignees: Solvay USA, Inc., Nano-C, Inc.Inventors: Darin W. Laird, Reza Stegamat, Henning Richter, Viktor Vejins, Larry Scott, Thomas A. Lada, Malika Daadi
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Publication number: 20140169104Abstract: Embodiments of tunneling barriers and methods for same can embed molecules exhibiting a monodispersion characteristic into a dielectric layer (e.g., between first and second layers forming a dielectric layer). In one embodiment, by embedding C60 molecules inbetween first and second insulating layers forming a dielectric layer, a field sensitive tunneling barrier can be implemented. In one embodiment, the tunneling barrier can be between a floating gate and a channel in a semiconductor structure. In one embodiment, a tunneling film can be used in nonvolatile memory applications where C60 provides accessible energy levels to prompt resonant tunneling through the dielectric layer upon voltage application. Embodiments also contemplate engineered fullerene molecules incorporated within the context of at least one of a tunneling dielectric and a floating gate within a nonvolatile flash memory structure.Type: ApplicationFiled: December 23, 2013Publication date: June 19, 2014Applicants: NANO-C, INC., CORNELL UNIVERSITYInventors: Edwin C. Kan, Qianying Xu, Ramesh Sivarajan, Henning Richter, Viktor Vejins