Patents by Inventor Kiyoshi Takai

Kiyoshi 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).

  • Treating raw materials containing titanium components
    Patent number: 4069295
    Abstract: A method of treating raw materials containing components of metals of the group IVb of the Periodic Table, which comprises heat-treating a raw material of a component of a metal of the group IVb of the Periodic Table containing coloring poisonous metal components such as Mn, V and Cr components in the presence of a flux composed mainly of an alkali metal nitrate or an alkali metal peroxide which is a thermal decomposition product of the alkali metal nitrate in an amount 2 to 5 times the amount of the raw material on the weight basis in a non-reducing atmosphere to thereby effect fluxing reaction, and subjecting the resulting fluxing reaction product to a leaching treatment of at least one stage in an aqueous medium to separate the fluxing reaction product into said coloring metal components and a concentrate of the component of the group IVb of the Periodic Table which is acid-soluble and substantially free of said coloring poisonous metal components.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: January 17, 1978
    Assignee: Mizusawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yujiro Sugahara, Yoshibumi Noshi, Hiroyuki Naito, Kiyoshi Takai, Noboru Maruyama
  • Ferruginous slag oxidizing apparatus
    Patent number: 4062531
    Abstract: The disclosure is of apparatus useful for oxidizing and mixing molten ferruginous metallurgical slags such as converter slag, electric steel making furnace slag and open hearth furnace slag.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: December 13, 1977
    Assignee: Osaka Iron & Steel Co., Ltd.
    Inventor: Kiyoshi Takai