Patents by Inventor Dai TAKAI

Dai TAKAI 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).

  • Nanocrystal production method, and steel production method
    Patent number: 10927442
    Abstract: A nanocrystal production method includes a light irradiation step of applying light to a surface of a metal material immersed in water to form nanocrystals on the surface. In this nanocrystal production method, the metal material contains iron, the nanocrystal contains at least one of iron oxide and iron hydroxide, and in the spectrum of the light, a wavelength at which the intensity is maximum is not less than 360 nm and less than 620 nm.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: February 23, 2021
    Assignees: Showa Denko Materials Co., Ltd., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Shuichiro Adachi, Masaki Kitagawa, Seiichi Watanabe, Lihua Zhang, Noriyuki Okinaka, Dai Takai
  • NANOCRYSTAL PRODUCTION METHOD, AND STEEL PRODUCTION METHOD
    Publication number: 20190249288
    Abstract: A nanocrystal production method includes a light irradiation step of applying light to a surface of a metal material immersed in water to form nanocrystals on the surface. In this nanocrystal production method, the metal material contains iron, the nanocrystal contains at least one of iron oxide and iron hydroxide, and in the spectrum of the light, a wavelength at which the intensity is maximum is not less than 360 nm and less than 620 nm.
    Type: Application
    Filed: August 25, 2017
    Publication date: August 15, 2019
    Inventors: Shuichiro ADACHI, Masaki KITAGAWA, Seiichi WATANABE, Lihua ZHANG, Noriyuki OKINAKA, Dai TAKAI