Patents by Inventor Masato Tachibana

Masato Tachibana 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: 9424960
    Abstract: A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cm3 or more; a weight reduction rate up to 450° C. of 50% or less; a G/D ratio for resonance Raman scattering measurement of 10 or more; and an electric conductivity of 50 S/cm or more.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: August 23, 2016
    Assignees: FURUKAWA ELECTRIC CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hiroaki Rikihisa, Masato Tachibana, Michihiro Shimada, Kinji Asaka, Ken Mukai, Takushi Sugino
  • Patent number: 9362022
    Abstract: A composite electric cable including a plurality of element wires twisted together. The element wires include a material wire formed of a composite material containing an aluminum material and carbon nanotubes dispersed in the aluminum material; the material wire has a cellulation structure including a wall portion containing the carbon nanotubes and an inside portion of the wall which is surrounded by the wall portion and which comprises the aluminum material and unavoidable impurities; the material wire has a ratio of carbon nanotube content to aluminum material content of 0.2 wt. % to 5 wt. %; and each of all the element wires forming the composite electric cable is the material wire, or the composite electric cable includes in a center portion thereof one or a plurality of steel wires.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: June 7, 2016
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hideki Kamiyama, Hiroji Akasaka, Masato Tachibana, Hiroaki Rikihisa, Takuzo Hagiwara
  • Publication number: 20140346697
    Abstract: A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cm3 or more; a weight reduction rate up to 450° C. of 50% or less; a G/D ratio for resonance Raman scattering measurement of 10 or more; and an electric conductivity of 50 S/cm or more.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Hiroaki RIKIHISA, Masato TACHIBANA, Michihiro SHIMADA, Kinji ASAKA, Ken MUKAI, Takushi SUGINO
  • Publication number: 20130251619
    Abstract: A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cm3 or more; a weight reduction rate up to 450° C. of 50% or less; a G/D ratio for resonance Raman scattering measurement of 10 or more; and an electric conductivity of 50 S/cm or more.
    Type: Application
    Filed: May 20, 2013
    Publication date: September 26, 2013
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hiroaki RIKIHISA, Masato TACHIBANA, Michihiro SHIMADA, Kinji ASAKA, Ken MUKAI, Takushi SUGINO
  • Publication number: 20120267141
    Abstract: A composite electric cable including a plurality of element wires twisted together. The element wires include a material wire formed of a composite material containing an aluminum material and carbon nanotubes dispersed in the aluminum material; the material wire has a cellulation structure including a wall portion containing the carbon nanotubes and an inside portion of the wall which is surrounded by the wall portion and which comprises the aluminum material and unavoidable impurities; the material wire has a ratio of carbon nanotube content to aluminum material content of 0.2 wt. % to 5 wt. %; and each of all the element wires forming the composite electric cable is the material wire, or the composite electric cable includes in a center portion thereof one or a plurality of steel wires.
    Type: Application
    Filed: January 20, 2011
    Publication date: October 25, 2012
    Applicant: Furukawa Electric Co., Ltd.
    Inventors: Hideki Kamiyama, Hiroji Akasaka, Masato Tachibana, Hiroaki Rikihisa, Takuzo Hagiwara
  • Patent number: 6700914
    Abstract: A vertical cavity surface emitting laser (VCSEL) device includes a pair of diffusion Bragg reflectors (DBRs) sandwiching therebetween a multiple quantum well (MQW) comprising active layers. The bottom DBR includes a lower layer structure having AlAs layers having a higher thermal conductivity and AlGaAs layers in pair and an upper layer structure acting anti-oxidation layers and having a pair of AlGaAs layers having different Al contents. A selectively oxidized AlAs layer disposed as the top layer of the bottom DBR comprises an Al-oxidized area and a non-oxidized layer for confinement of current injection path.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: March 2, 2004
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Noriyuki Yokouchi, Masato Tachibana, Natsumi Ueda, Tatsuyuki Shinagawa
  • Publication number: 20020101899
    Abstract: A vertical cavity surface emitting laser (VCSEL) device includes a pair of diffusion Bragg reflectors (DBRs) sandwiching therebetween a multiple quantum well (MQW) comprising active layers. The bottom DBR includes a lower layer structure having AlAs layers having a higher thermal conductivity and AlGaAs layers in pair and an upper layer structure acting anti-oxidation layers and having a pair of AlGaAs layers having different Al contents. A selectively oxidized AlAs layer disposed as the top layer of the bottom DBR comprises an Al-oxidized area and a non-oxidized layer for confinement of current injection path.
    Type: Application
    Filed: May 30, 2001
    Publication date: August 1, 2002
    Inventors: Noriyuki Yokouchi, Masato Tachibana, Natsumi Ueda, Tatsuyuki Shinagawa
  • Patent number: 6122257
    Abstract: In a bus type LAN, the data transmitted from a terminal (14) is detected by an adapter (1) connected to one end of a bus (3), and in response thereto the adapter (1) transmits a pulse signal onto the bus (3). An adapter (2) connected to the other end of the bus (3) receives the data transmitted from the terminal (14) and detects its source terminal address. A difference in time between the arrival of the data from the terminal (14) and the arrival of the pulse signal from the adapter (1) is measured by a counter circuit (21), and the count value obtained is stored in a memory (23), forming a pair with the corresponding source terminal address. Thus, the count value can be obtained for each terminal during the normal operation of the LAN. The data of the memory (23) are extracted by a personal computer (5), where the physical position of each terminal is calculated in accordance with the bus propagation velocity, and is displayed or printed out as a physical constitution diagram.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: September 19, 2000
    Assignees: Hitachi Electronics Services Co, Ltd, Link Laboratory Inc.
    Inventors: Naoyoshi Machida, Toshihito Ochi, Hiromi Kawaguchi, Mineo Ogino, Masahiko Kurata, Masato Tachibana, Tadayuki Ichiba