Patents by Inventor Ryota Yuge

Ryota Yuge 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: 11981568
    Abstract: An object of the present invention is to provide a member and a method for producing a fibrous carbon nanohorn aggregate with high efficiency.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: May 14, 2024
    Assignee: NEC CORPORATION
    Inventors: Ryota Yuge, Hideyuki Satou
  • Patent number: 11952281
    Abstract: Disclosed is a hydrophilic carbon nanohorn aggregate comprising a carbon nanohorn aggregate having an oxygen-containing functional group introduced at a tip of a carbon nanohorn, and a cyclodextrin which is capping the tip of the carbon nanohorn and being stabilized.
    Type: Grant
    Filed: July 7, 2022
    Date of Patent: April 9, 2024
    Assignee: NEC CORPORATION
    Inventor: Ryota Yuge
  • Publication number: 20240002990
    Abstract: An object of the present invention is to provide a structure, a sliding member and a connector, having a surface (sliding surface) that is excellent in abrasion resistance and can keep contact resistance low for a long period, and a method for producing the structure. The object is attained by a structure having a configuration where a nanocarbon material is disposed on an at least partial surface of a metal, a sliding member and a connector, having the configuration, and a method for producing the structure. In the structure, it is preferred that a coating containing the nanocarbon material and an organic compound having at least a first functional group having affinity for the metal and a second functional group having affinity for the nanocarbon material should be disposed on the at least partial surface of the metal.
    Type: Application
    Filed: July 20, 2021
    Publication date: January 4, 2024
    Inventors: Kazuomi SATO, Kazuhiro TOKUNAGA, Yasuhiro YUZURIHARA, Mayumi KOSAKA, Ryota YUGE
  • Publication number: 20230384165
    Abstract: Disclosed is a bolometer type infrared detector comprising: a substrate, a bolometer film comprising semiconducting carbon nanotubes, and two electrodes spaced from each other and connected to the bolometer film, wherein at least one of the two electrodes is formed of a metal alloy comprising at least two metals selected from the group consisting of Li, Be, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Sb, Ba, La, Hf, Ta, Ir, Pt, Au, and Bi.
    Type: Application
    Filed: May 24, 2023
    Publication date: November 30, 2023
    Applicant: NEC Corporation
    Inventors: Tomo TANAKA, Masahiko ISHIDA, Ryota YUGE
  • Publication number: 20230288262
    Abstract: An object of the present invention is to provide a bolometer thin film and an infrared sensor having a high TCR value, and a method for manufacturing the same. According to the present invention, a bolometer material which is a thin film comprising semiconducting carbon nanotubes and a negative thermal expansion material, and an infrared sensor comprising the bolometer material are provided.
    Type: Application
    Filed: May 25, 2021
    Publication date: September 14, 2023
    Applicant: NEC Corporation
    Inventors: Ryota YUGE, Tomo TANAKA
  • Publication number: 20230160750
    Abstract: A bolometer having a high TCR, a bolometer array, and a method for manufacturing the same are provided. The present invention is related to a bolometer including a substrate, a positively charged adhesive layer provided on the substrate, and a bolometer film comprising semiconducting carbon nanotubes and a negative thermal expansion material, both of which are negatively charged, and are electrostatically adsorbed to the adhesive layer.
    Type: Application
    Filed: November 23, 2022
    Publication date: May 25, 2023
    Applicant: NEC Corporation
    Inventors: Ryota Yuge, Tomo Tanaka, Toshie Miyamoto
  • Patent number: 11650175
    Abstract: A dispersion liquid of the present invention includes: a carbon nanohorn aggregate obtained by aggregating a plurality of single-walled carbon nanohorns in a fibrous form; and a solvent.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: May 16, 2023
    Assignee: NEC CORPORATION
    Inventors: Noriyuki Tonouchi, Ryota Yuge
  • Publication number: 20230036037
    Abstract: Disclosed is a hydrophilic carbon nanohorn aggregate comprising a carbon nanohorn aggregate having an oxygen-containing functional group introduced at a tip of a carbon nanohorn, and a cyclodextrin which is capping the tip of the carbon nanohorn and being stabilized.
    Type: Application
    Filed: July 7, 2022
    Publication date: February 2, 2023
    Applicant: NEC Corporation
    Inventor: Ryota YUGE
  • Patent number: 11552295
    Abstract: A lithium-manganese composite oxide containing a lithium-iron-manganese composite oxide represented by the composition formula. Li1+x?w(FeyNizMn1?y?z)1?xO2??, where 0<x<?, 0?w<0.8, 0<y<1, 0<z<0.5, y+z<1, and 0??<0.5, in which at least in a state of charge of a lithium ion battery using the lithium-manganese composite oxide as a positive-electrode active material, at least some of iron atoms are pentavalent.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: January 10, 2023
    Assignee: NEC CORPORATION
    Inventors: Ryota Yuge, Mitsuharu Tabuchi, Kyousuke Doumae, Hideka Shibuya
  • Patent number: 11511998
    Abstract: The present invention addresses the problem of providing a method for producing a fibrous carbon nanohorn aggregate with higher efficiency. According to one embodiment of the present invention, a method for producing a carbon nanohorn aggregate comprising a fibrous carbon nanohorn aggregate, is provided, which includes a step (a) of fixing the end of a rod-shaped carbon target to a fixing jig, and a step (b) of irradiating the rod-shaped carbon target with a laser light, and moving the irradiation position of the laser light in the longitudinal direction of the rod-shaped carbon target without rotating the rod-shaped carbon target.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: November 29, 2022
    Assignee: NEC CORPORATION
    Inventor: Ryota Yuge
  • Patent number: 11498837
    Abstract: Provided is a shortened fibrous carbon nanohorn aggregate (CNB) obtained by shortening a CNB having a length of 1 ?m or more and a diameter in the short direction in the range of 30 to 100 nm, by oxidizing, stirring in an acid solution, subjecting to an ultrasonic treatment in a liquid, followed by cutting. The shortened CNB has an end surface on which no tip of the plurality of single-walled carbon nanohorns is disposed toward the longitudinal direction at least one end in the longitudinal direction, and has an excellent dispersibility by shortening the length to less than 1 ?m.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: November 15, 2022
    Assignee: NEC CORPORATION
    Inventor: Ryota Yuge
  • Patent number: 11485641
    Abstract: In order to provide an apparatus for industrially producing a fibrous carbon nanohorn aggregate (CNB), the apparatus comprises: a target holding unit holding a carbon target in sheet form containing a metal catalyst such as Fe; a light source irradiating a laser beam on a surface of the carbon target; a movement unit moving one of the target held by the target holding unit and the light source relative to the other to move the irradiation position of the laser beam on the surface of the target; a production chamber configured to irradiate the carbon target with the laser beam in an atmosphere of non-oxidizing gas to produce a product including the fibrous carbon nanohorn aggregate; a collection mechanism collecting carbon vapor evaporated from the target by irradiation of the laser beam to collect nanocarbon including the fibrous carbon nanohorn aggregate; and a control unit controlling an operation of the movement unit or the light source so that the power density of the laser beam irradiated to the surface
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: November 1, 2022
    Assignee: NEC CORPORATION
    Inventor: Ryota Yuge
  • Publication number: 20220267152
    Abstract: The object of the present invention is to provide a separation method and a separation apparatus for carbon nanotubes capable of separating a mixture of carbon nanotubes in a highly efficient, inexpensive and simple manner.
    Type: Application
    Filed: July 20, 2020
    Publication date: August 25, 2022
    Applicants: NEC Corporation, Meijo University
    Inventors: Ryota YUGE, Sumio IIJIMA
  • Patent number: 11417881
    Abstract: A lithium-manganese composite oxide represented by formula (1): Li1+x[(FeyNi1?y)zMn1?z]1?xO2 (1) wherein x, y, and z satisfy the following: 0<x??, 0?y<1.0, and 0<z?0.6, and wherein the content ratio of Li to the total content of Fe, Ni, and Mn (Li/(Fe+Ni+Mn)) is 1.55 or less on a molar ratio basis, the lithium-manganese composite oxide containing a crystalline phase having a layered rock-salt structure. This composite oxide is a novel material made from less resource-constrained and cheaper elements, and exhibits a high specific capacity, excellent charge-and-discharge cycle characteristics, and a high discharge capacity at a high current density (excellent rate characteristics), when used in the positive electrode material for lithium-ion secondary batteries.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: August 16, 2022
    Assignees: National Institute ot Advanced Industrial Science and Technology, Tanaka Chemical Corporation, NEC Corporation
    Inventors: Mitsuharu Tabuchi, Hideka Shibuya, Takashi Ohtomo, Noriyuki Tamura, Kaoru Narita, Ryota Yuge, Naoki Kawano
  • Publication number: 20220242733
    Abstract: The object of the present invention is to provide a production method and a production apparatus for a thin film of aligned carbon nanotubes. The present invention relates to a production method for an aligned carbon nanotube film having a film thickness of less than 1000 nm, including a step of causing a part of a dispersion solvent liquid of a carbon nanotube dispersion liquid to permeate to a lower surface side of a filter paper while causing the carbon nanotube dispersion liquid to flow in one direction on an upper surface of the filter paper, and a production apparatus that can be used for said method.
    Type: Application
    Filed: July 20, 2020
    Publication date: August 4, 2022
    Applicant: NEC Corporation
    Inventors: Ryota YUGE, Sumio ILJIMA
  • Publication number: 20220221346
    Abstract: An object of the present invention is to provide a bolometer having a high TCR value and a low resistance, and a method for manufacturing the infrared sensor.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 14, 2022
    Applicant: NEC Corporation
    Inventors: Ryota YUGE, Noriyuki TONOUCH
  • Patent number: 11383984
    Abstract: A nanocarbon separation device includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a partition member that is provided between the first electrode and the second electrode in the separation tank, and the partition member partitions the separation tank into a plurality of regions.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: July 12, 2022
    Assignee: NEC CORPORATION
    Inventors: Kazuki Ihara, Mayumi Kosaka, Ryota Yuge, Hideaki Numata, Fumiyuki Nihey
  • Publication number: 20220109076
    Abstract: An object of the present invention is to provide an infrared sensor having a high TCR value, and a method for manufacturing the infrared sensor. The infrared sensor comprises a substrate, a first electrode on the substrate, a second electrode spaced from the first electrode on the substrate, and a carbon nanotube layer electrically connected with the first electrode and the second electrode, wherein the carbon nanotube layer comprises semiconducting carbon nanotubes in an amount more than 66% by mass based on the total amount of carbon nanotubes and 60% or more of the carbon nanotubes contained in the carbon nanotube layer have a diameter within a range of 0.6 to 1.5 nm and a length within a range of 100 nm to 5 ?m.
    Type: Application
    Filed: January 17, 2020
    Publication date: April 7, 2022
    Applicant: NEC Corporation
    Inventors: Ryota YUGE, Kaoru NARITA, Toma TANAKA
  • Publication number: 20220102735
    Abstract: A nanocarbon material aggregate excellent as a catalyst in an electrochemical reaction can be provided. The present invention relates to a nanocarbon material aggregate, comprising: a fibrous carbon nanohorn aggregate constituted by a plurality of carbon nanohorns including a carbon nanohorn having a hole-opening; and a first particle encapsulated in the carbon nanohorn having a hole-opening and partially exposed to the outside from the carbon nanohorn.
    Type: Application
    Filed: January 27, 2020
    Publication date: March 31, 2022
    Applicant: NEC Corporation
    Inventors: Kazuki IHARA, Takashi MANAKO, Ryota YUGE
  • Publication number: 20220098041
    Abstract: An object of the present invention is to provide a member and a method for producing a fibrous carbon nanohorn aggregate with high efficiency.
    Type: Application
    Filed: January 27, 2020
    Publication date: March 31, 2022
    Applicant: NEC Corporation
    Inventors: Ryota YUGE, Hideyuki SATOU