Patents by Inventor Takafumi Akamatsu

Takafumi Akamatsu 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).

  • ELECTRONIC DEVICE MATERIAL, ELECTRONIC DEVICE, SENSOR DEVICE, AND GAS SENSOR
    Publication number: 20230217803
    Abstract: An electronic device material includes: carbon nanotubes having a purity of Semiconductor Carbon Nanotubes of 80% by mass or more; and a n-type semiconductor.
    Type: Application
    Filed: June 10, 2021
    Publication date: July 6, 2023
    Applicant: Toray Industries, Inc.
    Inventors: Yoshitake Masuda, Takafumi Akamatsu, Akihiro Tsuruta, Takayoshi Hirai, Kojiro Naito, Seiichiro Murase
  • Glass composition and sealing material
    Patent number: 8741792
    Abstract: Provided is a glass composition that has a low reactivity with the constituent materials forming a solid oxide fuel cell while having a thermal expansion coefficient suitable for sealing a solid oxide fuel cell, and a glass composition and sealing material that are suitable for sealing a solid oxide fuel cell. The present invention, which relates to a sealing glass composition, is a sealing glass composition used for sealing a solid oxide fuel cell, characterized by having a composition ratio of, expressed in terms of oxide, 40 to 55% by mass of SiO2, 0 to 5.0% by mass of Al2O3, 0 to 8.0% by mass of B2O3, 20 to 30% by mass of MgO, and 10 to 24% by mass of CaO, wherein a total of the MgO and the CaO is 40 to 54% by mass.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: June 3, 2014
    Assignee: Nihon Yamamura Glass Co., Ltd.
    Inventors: Takafumi Akamatsu, Yoshitaka Mayumi
  • Glass Composition and Sealing Material
    Publication number: 20120316052
    Abstract: Provided is a glass composition that has a low reactivity with the constituent materials forming a solid oxide fuel cell while having a thermal expansion coefficient suitable for sealing a solid oxide fuel cell, and a glass composition and sealing material that are suitable for sealing a solid oxide fuel cell. The present invention, which relates to a sealing glass composition, is a sealing glass composition used for sealing a solid oxide fuel cell, characterized by having a composition ratio of, expressed in terms of oxide, 40 to 55% by mass of SiO2, 0 to 5.0% by mass of Al2O3, 0 to 8.0% by mass of B2O3, 20 to 30% by mass of MgO, and 10 to 24% by mass of CaO, wherein a total of the MgO and the CaO is 40 to 54% by mass.
    Type: Application
    Filed: February 24, 2011
    Publication date: December 13, 2012
    Applicant: NIHON YAMAMURA GLASS CO., LTD.
    Inventors: Takafumi Akamatsu, Yoshitaka Mayumi