Patents by Inventor Itoko Saita

Itoko Saita 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).

  • Method of producing magnesium-based hydrides and apparatus for producing magnesium-based hydrides
    Patent number: 7998454
    Abstract: A first heat treatment is carried out in which a material powder comprising magnesium is kept in the atmosphere of hydrogen gas and the temperature and pressure in the atmosphere of hydrogen gas are maintained in the temperature-pressure region in which single Mg and H2 coexist in a thermodynamically stable state, whereby the coating on the surface of the material powder is removed. Next, a second heat treatment is carried out in which the temperature and pressure in the atmosphere of hydrogen gas are changed and maintained in the temperature-pressure region in which MgH2 exists in a thermodynamically stable state. Hence, Mg from which the coating is removed reacts promptly with H2, and MgH2 is produced at high yield. Magnesium-based hydrides containing high purity MgH2 can thus be obtained by supplying energy less than that required for the related art that requires an activation treatment.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: August 16, 2011
    Assignees: Bio Coke Lab. Co. Ltd.
    Inventors: Tomohiro Akiyama, Kouwa Cho, Masahito Satoh, Haruya Hayashi, Taketo Hiraki, Itoko Saita, Hiroshi Uesugi
  • Method of producing Magnesium-based Hydrides and apparatus for producing Magnesium-based Hydrides
    Publication number: 20080279762
    Abstract: A first heat treatment is carried out in which a material powder comprising magnesium is kept in the atmosphere of hydrogen gas and the temperature and pressure in the atmosphere of hydrogen gas are maintained in the temperature-pressure region in which single Mg and H2 coexist in a thermodynamically stable state, whereby the coating on the surface of the material powder is removed. Next, a second heat treatment is carried out in which the temperature and pressure in the atmosphere of hydrogen gas are changed and maintained in the temperature-pressure region in which MgH2 exists in a thermodynamically stable state. Hence, Mg from which the coating is removed reacts promptly with H2, and MgH2 is produced at high yield. Magnesium-based hydrides containing high purity MgH2 can thus be obtained by supplying energy less than that required for the related art that requires an activation treatment.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 13, 2008
    Inventors: Tomohiro Akiyama, Kouwa Cho, Masahito Satoh, Haruya Hayashi, Taketo Hiraki, Itoko Saita, Hiroshi Uesugi