Patents by Inventor Yuichi SUNAGA

Yuichi SUNAGA 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).

  • Carbon nanotube array and its production method, and spun carbon nanotube yarn and its production method
    Patent number: 11753303
    Abstract: A carbon nanotube array constituted by large numbers of carbon nanotubes vertically aligned on a substrate is produced by supplying a carbon source gas into a reaction vessel having a hydrogen gas atmosphere, in which a substrate on which a reaction catalyst comprising fine metal particles is formed is placed; forming large numbers of vertically aligned carbon nanotubes on the substrate by keeping a reaction temperature of 500-1100° C. for 0.5-30 minutes; and heat-treating the carbon nanotubes by stopping the supply of the carbon source gas and keeping 400-1100° C. for 0.5-180 minutes in a non-oxidizing atmosphere.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: September 12, 2023
    Assignee: SUGITA DENSEN CO., LTD.
    Inventors: Kenta Naka, Toru Iijima, Yuichi Sunaga, Akikazu Sugita, Shuji Tsuruoka
  • CARBON NANOTUBE ARRAY AND ITS PRODUCTION METHOD, AND SPUN CARBON NANOTUBE YARN AND ITS PRODUCTION METHOD
    Publication number: 20200079652
    Abstract: A carbon nanotube array constituted by large numbers of carbon nanotubes vertically aligned on a substrate is produced by supplying a carbon source gas into a reaction vessel having a hydrogen gas atmosphere, in which a substrate on which a reaction catalyst comprising fine metal particles is formed is placed; forming large numbers of vertically aligned carbon nanotubes on the substrate by keeping a reaction temperature of 500-1100° C. for 0.5-30 minutes; and heat-treating the carbon nanotubes by stopping the supply of the carbon source gas and keeping 400-1100° C. for 0.5-180 minutes in a non-oxidizing atmosphere.
    Type: Application
    Filed: March 22, 2019
    Publication date: March 12, 2020
    Applicant: SUGITA DENSEN CO., LTD.
    Inventors: Kenta NAKA, Toru IIJIMA, Yuichi SUNAGA, Akikazu SUGITA, Shuji TSURUOKA