Patents by Inventor Takayoshi Shirai

Takayoshi Shirai 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).

  • Process for production of titanium tetrachloride
    Patent number: 4014976
    Abstract: Titanium tetrachloride is produced by reacting a titaniferous material having a particle size of 150 mesh or less (Tyler standard) as a median value with a chlorine-containing gas in the presence of a coarse carbonaceous substance in a dilute-phase fluidization system.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: March 29, 1977
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Masaaki Adachi, Takayoshi Shirai, Norio Nakasuzi
  • Process for producing titanium tetrachloride
    Patent number: 3991157
    Abstract: A chlorine-containing gas is introduced as an upward flow into a vertical, upwardly widening column-type reactor, and a titaniferous material and a solid carbonaceous reducing agent are charged into the reactor at its upper and lower parts to effect chlorination in a dilute-phase fluidization system accompanied by reflux of part of the solid materials and thereby yield titanium tetrachloride.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: November 9, 1976
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Masaaki Adachi, Kenichi Ichimura, Takayoshi Shirai