Patents by Inventor Hiroshi Yokoo

Hiroshi Yokoo 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).

  • Porous cordierite ceramics
    Patent number: 4871693
    Abstract: New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or provided with a few or an abundance of open pores which is used as a starting material for the porous cordierite ceramics. The porous cordierite ceramics are produced by subjecting a starting solution containing an alkyl silicate, an aluminum salt and an magnesium salt optionally with other compounds in an organic or aqueous organic solvent to spray thermal decomposition to prepare the hollow microspherical cordierite glass powder, and then processing the cordierite glass powder to a shaped body after or before an optional heat treatment and firing the shaped body at a temperature below the melting point of cordierite. The porous cordierite ceramics are useful as a carrier for gas chromatography or various chemical reactions.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: October 3, 1989
    Assignee: Kanto Kagaku Kabushiki Kaisha
    Inventors: Senya Inoue, Akira Ono, Mikio Kobayashi, Hiroshi Yokoo
  • Porous cordierite ceramics, a process for producing same and use of the porous cordierite ceramics
    Patent number: 4698317
    Abstract: New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or provided with a few or an abundance of open pores which is used as a starting material for the porous cordierite ceramics. The porous cordierite ceramics are produced by subjecting a starting solution containing an alkyl silicate, an aluminum salt and an magnesium salt optionally with other compounds in an organic or aqueous organic solvent to spray thermal decomposition to prepare the hollow microspherical cordierite glass powder, and then processing the cordierite glass powder to a shaped body after or before an optional heat treatment and firing the shaped body at a temperature below the melting point of cordierite. The porous cordierite ceramics are useful as a carrier for gas chromatography or various chemical reactions.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: October 6, 1987
    Assignee: Kanto Kagaku Kabushiki Kaisha
    Inventors: Senya Inoue, Akira Ono, Mikio Kobayashi, Hiroshi Yokoo