Patents by Inventor Kota KATAYAMA

Kota KATAYAMA 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).

  • Publication number: 20230377775
    Abstract: A NbTi superconducting multicore wire includes a core portion and a first barrier layer arranged around the core portion and composed of a first copper alloy including at least one element selected from Ni or Mn. A filament assembly arranged around the first barrier layer includes NbTi filament assemblies each including at least seven NbTi filaments, embedded in a matrix of a second copper alloy including at least one element selected from Ni or Mn. A second barrier layer is arranged around the filament assembly and composed of the first copper alloy, and a stabilizing layer arranged around the second barrier layer and composed of metal. The NbTi filaments are arranged in circular shapes each having a different diameter, centering on one NbTi filament, and NbTi filaments arranged in a circular shape in an outermost circle being arranged at approximately equal intervals along a circumferential direction.
    Type: Application
    Filed: September 29, 2021
    Publication date: November 23, 2023
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masahiro SUGIMOTO, Kota KATAYAMA, Hideki II, Tomoya KATO
  • Publication number: 20230016999
    Abstract: A precursor for Nb3Sn single-core superconducting wire includes a Sn-based wire rod, a first Cu-based tube covering an outer circumferential surface of the Sn-based wire rod, an Nb-based tube covering an outer surface of the first Cu-based tube, and a second Cu-based tube covering an outer surface of the Nb-based tube. The Sn-based wire rod contains a matrix phase and at least one kind of hard phases that is harder than the matrix phase. In a cross section parallel to a longitudinal direction of the precursor for Nb3Sn single-core superconducting wire, a maximum dimension of the hard phases in a width direction perpendicular to the longitudinal direction is 50% or less of a minimum dimension in the width direction of the Sn-based wire rod and/or is equal to or smaller than a minimum thickness in the width direction of the Nb-based tube.
    Type: Application
    Filed: December 4, 2020
    Publication date: January 19, 2023
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Daisuke ASAMI, Kota KATAYAMA, Masahiro SUGIMOTO, Hideki II, Hisaki SAKAMOTO, Tomoya KATO
  • Publication number: 20220005632
    Abstract: An insulation-coated compound superconducting wire includes a compound superconducting wire having a compound superconducting part which includes a first matrix and a plurality of compound superconducting filaments containing compound superconducting phases, a reinforcing part disposed on the outer circumferential side of the compound superconducting part and includes a plurality of reinforced filaments, a second matrix and a second stabilizing material. A stabilizing part is disposed on at least one side among the inner circumferential side and the outer circumferential side of the reinforcing part. An electrical insulation part covers the outer circumferential surface of the compound superconducting wire, in which the insulation-coated compound superconducting wire has a critical current value (Ic) larger than that of the compound superconducting wire before being covered with the electrical insulation part.
    Type: Application
    Filed: September 20, 2019
    Publication date: January 6, 2022
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masahiro SUGIMOTO, Hirokazu TSUBOUCHI, Kota KATAYAMA, Hideki II
  • Patent number: 9824796
    Abstract: An oxide superconductor includes: a substrate made of a metal; an insulating intermediate layer provided on the substrate; an oxide superconducting layer provided on the intermediate layer; a metal stabilizing layer provided on the oxide superconducting layer; and a plurality of dividing grooves which divide the metal stabilizing layer and the oxide superconducting layer along a longitudinal direction of the substrate, reach the inside of the intermediate layer through the oxide superconducting layer from the metal stabilizing layer, and do not reach the substrate. The metal stabilizing layer and the oxide superconducting layer are divided to form a plurality of filament conductors by the plurality of dividing grooves, and in each dividing groove of the plurality of dividing grooves, a width of a groove opening portion of the dividing groove is equal to or greater than a width of a groove bottom portion of the dividing groove.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: November 21, 2017
    Assignees: FUJIKURA LTD., SWCC SHOWA CABLE SYSTEMS CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Takato Machi, Tomo Yoshida, Tatsunori Nakamura, Kota Katayama, Koichi Nakao, Keiichi Tanabe
  • Publication number: 20160125977
    Abstract: An oxide superconductor includes: a substrate made of a metal; an insulating intermediate layer provided on the substrate; an oxide superconducting layer provided on the intermediate layer; a metal stabilizing layer provided on the oxide superconducting layer; and a plurality of dividing grooves which divide the metal stabilizing layer and the oxide superconducting layer along a longitudinal direction of the substrate, reach the inside of the intermediate layer through the oxide superconducting layer from the metal stabilizing layer, and do not reach the substrate. The metal stabilizing layer and the oxide superconducting layer are divided to form a plurality of filament conductors by the plurality of dividing grooves, and in each dividing groove of the plurality of dividing grooves, a width of a groove opening portion of the dividing groove is equal to or greater than a width of a groove bottom portion of the dividing groove.
    Type: Application
    Filed: May 28, 2014
    Publication date: May 5, 2016
    Applicants: International Superconductivity Technology Center, FUJIKURA LTD., SWCC SHOWA CABLE SYSTEMS CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Takato MACHI, Tomo YOSHIDA, Tatsunori NAKAMURA, Kota KATAYAMA, Koichi NAKAO, Keiichi TANABE