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).

  • Patent number: 11450446
    Abstract: 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: Grant
    Filed: May 5, 2015
    Date of Patent: September 20, 2022
    Assignee: NANO-C, INC.
    Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Publication number: 20210039987
    Abstract: 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: Application
    Filed: January 23, 2019
    Publication date: February 11, 2021
    Inventors: Ramesh SIVARAJAN, Melissa J. RICCI, Colleen E. TREACY, Viktor VEJINS
  • Publication number: 20190322818
    Abstract: 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: Application
    Filed: June 4, 2019
    Publication date: October 24, 2019
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Patent number: 10308773
    Abstract: 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: Grant
    Filed: April 9, 2018
    Date of Patent: June 4, 2019
    Assignee: Gates Corporation
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Publication number: 20180223052
    Abstract: 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: Application
    Filed: April 9, 2018
    Publication date: August 9, 2018
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Patent number: 10023755
    Abstract: 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: Grant
    Filed: March 28, 2016
    Date of Patent: July 17, 2018
    Assignee: NANO-C, INC.
    Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Publication number: 20180144844
    Abstract: 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: Application
    Filed: May 5, 2015
    Publication date: May 24, 2018
    Inventors: Ramesh SIVARAJAN, Henning RICHTER, Viktor VEJINS
  • Patent number: 9938383
    Abstract: 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: Grant
    Filed: January 23, 2017
    Date of Patent: April 10, 2018
    Assignee: Gates Corporation
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Publication number: 20170130010
    Abstract: 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: Application
    Filed: January 23, 2017
    Publication date: May 11, 2017
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Patent number: 9550907
    Abstract: 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: Grant
    Filed: February 27, 2015
    Date of Patent: January 24, 2017
    Assignee: Gates Corporation
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Patent number: 9472765
    Abstract: 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: Grant
    Filed: February 19, 2014
    Date of Patent: October 18, 2016
    Assignees: SOLVAY USA INC., NANO-C, INC.
    Inventors: Darin W. Laird, Reza Stegamat, Henning Richter, Viktor Vejins, Lawrence T. Scott, Thomas A. Lada
  • Publication number: 20160257833
    Abstract: 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: Application
    Filed: March 28, 2016
    Publication date: September 8, 2016
    Inventors: Ramesh SIVARAJAN, Henning RICHTER, Viktor VEJINS
  • Publication number: 20160251534
    Abstract: 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: Application
    Filed: February 27, 2015
    Publication date: September 1, 2016
    Inventors: Donald James Burlett, Henning Richter, Ramesh Sivarajan, Viktor Vejins
  • Patent number: 9340697
    Abstract: 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: Grant
    Filed: December 21, 2012
    Date of Patent: May 17, 2016
    Assignee: NANO-C, INC.
    Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Patent number: 9296912
    Abstract: 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: Grant
    Filed: August 12, 2010
    Date of Patent: March 29, 2016
    Assignee: NANO-C, INC.
    Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Patent number: 9219166
    Abstract: 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: Grant
    Filed: December 23, 2013
    Date of Patent: December 22, 2015
    Assignee: CORNELL UNIVERSITY
    Inventors: Edwin C. Kan, Qianying Xu, Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Patent number: 9214256
    Abstract: 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: Grant
    Filed: March 16, 2009
    Date of Patent: December 15, 2015
    Assignee: Nano-C, Inc.
    Inventors: Ramesh Sivarajan, Henning Richter, Viktor Vejins
  • Publication number: 20140251434
    Abstract: 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: Application
    Filed: February 19, 2014
    Publication date: September 11, 2014
    Applicants: Plextronics, Inc., Nano-C, Inc.
    Inventors: Darin W. LAIRD, Reza STEGAMAT, Henning RICHTER, Viktor VEJINS, Lawrence T. SCOTT, Thomas A. LADA, II
  • Patent number: 8815124
    Abstract: 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: Grant
    Filed: February 29, 2008
    Date of Patent: August 26, 2014
    Assignees: Solvay USA, Inc., Nano-C, Inc.
    Inventors: Darin W. Laird, Reza Stegamat, Henning Richter, Viktor Vejins, Larry Scott, Thomas A. Lada, Malika Daadi
  • Publication number: 20140169104
    Abstract: 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: Application
    Filed: December 23, 2013
    Publication date: June 19, 2014
    Applicants: NANO-C, INC., CORNELL UNIVERSITY
    Inventors: Edwin C. Kan, Qianying Xu, Ramesh Sivarajan, Henning Richter, Viktor Vejins