Patents by Inventor Youichi Ishibai

Youichi Ishibai 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).

  • Visible light-responsive photocatalyst, method for producing same, photocatalyst coating agent using same, and photocatalyst dispersion
    Patent number: 7820584
    Abstract: Disclosed is a photocatalyst which is excited when irradiated with visible light and exhibits high photocatalytic activity stably. This photocatalyst has a white hue with little yellow tint. Specifically, titanium oxide particles and a halogenated platinum compound are heated and mixed in a liquid medium, so that the surfaces of the titanium oxide particles are loaded with the halogenated platinum compound; then the pH of the liquid medium is adjusted to 5 or less; and after that, the liquid medium is neutralized if necessary. By such a process, there can be produced a photocatalyst having a specific surface area of 10-100 m2/g, wherein the surfaces of the titanium oxide particles are loaded with the halogenated platinum compound and the b* value of the powder color according to the Hunter color system is not more than 6.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: October 26, 2010
    Assignee: Nihon Nohyaku Co., Ltd.
    Inventors: Youichi Ishibai, Takashi Nishikawa, Junya Sato
  • Visible Light-Responsive Photocatalyst, Method for Producing Same, Photocatalyst Coating Agent Using Same, and Photocatalyst Dispersion
    Publication number: 20090048098
    Abstract: Disclosed is a photocatalyst which is excited when irradiated with visible light and exhibits high photocatalytic activity stably. This photocatalyst has a white hue with little yellow tint. Specifically, titanium oxide particles and a halogenated platinum compound are heated and mixed in a liquid medium, so that the surfaces of the titanium oxide particles are loaded with the halogenated platinum compound; then the pH of the liquid medium is adjusted to 5 or less; and after that, the liquid medium is neutralized if necessary. By such a process, there can be produced a photocatalyst having a specific surface area of 10-100 m2/g, wherein the surfaces of the titanium oxide particles are loaded with the halogenated platinum compound and the b* value of the powder color according to the Hunter color system is not more than 6.
    Type: Application
    Filed: March 13, 2007
    Publication date: February 19, 2009
    Inventors: Youichi Ishibai, Takashi Nishikawa, Junya Sato