Patents by Inventor Masahito Osawa

Masahito Osawa 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).

  • Magnesium-based hydrogen storage alloys
    Patent number: 8475608
    Abstract: Magnesium-based hydrogen storage alloys having metallic magnesium (Mg) and a magnesium-containing intermetallic compound (MgxMy wherein y is 1?x) and containing not less than 60 mass-% of magnesium in total, and having a phase of a primarily crystallized magnesium-containing intermetallic compound in its solidification structure.
    Type: Grant
    Filed: November 25, 2005
    Date of Patent: July 2, 2013
    Assignee: Japan Metals and Chemicals Co., Ltd.
    Inventors: Masahito Osawa, Hidenori Tomioka, Naoyoshi Terashita, Noboru Hayami, Shigeru Tsunokake
  • Method for producing Mg-REM-Ni based hydrogen-absorbing alloy
    Patent number: 7988800
    Abstract: In order to accurately and efficiently alloy a Mg-REM-Ni based hydrogen-absorbing alloy in accordance with a target composition, which was difficult in the industrial production by the conventional technique, a rare earth element starting material and a nickel starting material are firstly melted in a melting furnace to form a melt of REM-Ni alloy, and then a magnesium starting material is added to the alloy melt and an interior of the melting furnace is kept at a given pressure to form a melt of Mg-REM-Ni alloy, and thereafter the alloy melt is cooled and solidified at a given cooling rate to produce a Mg-REM-Ni based hydrogen-absorbing alloy.
    Type: Grant
    Filed: February 21, 2005
    Date of Patent: August 2, 2011
    Assignee: Japan Metals and Chemicals Co., Ltd.
    Inventors: Masahito Osawa, Katsuyuki Kudo, Akihito Maeda, Seiji Takahashi
  • Method for producing mg-rem-ni based hydrogen-absorbing alloy
    Publication number: 20070119524
    Abstract: In order to accurately and efficiently alloy a Mg-REM-Ni based hydrogen-absorbing alloy in accordance with a target composition, which was difficult in the industrial production by the conventional technique, a rare earth element starting material and a nickel starting material are firstly melted in a melting furnace to form a melt of REM-Ni alloy, and then a magnesium starting material is added to the alloy melt and an interior of the melting furnace is kept at a given pressure to form a melt of Mg-REM-Ni alloy, and thereafter the alloy melt is cooled and solidified at a given cooling rate to produce a Mg-REM-Ni based hydrogen-absorbing alloy.
    Type: Application
    Filed: February 21, 2005
    Publication date: May 31, 2007
    Applicant: JAPAN METALS AND CHEMICALS CO., LTD.
    Inventors: Masahito Osawa, Katsuyuki Kudo, Akihito Maeda, Seiji Takahashi
  • Magnesium-based hydrogen storage alloys
    Publication number: 20060073066
    Abstract: Magnesium-based hydrogen storage alloys comprise metallic magnesium (Mg) and a magnesium-containing intermetallic compound (MgxMy wherein y is 1-x) and contain not less than 60 mass-% of magnesium in total, and have a phase of a primarily crystallized magnesium-containing intermetallic compound in its solidification structure.
    Type: Application
    Filed: November 25, 2005
    Publication date: April 6, 2006
    Applicant: Japan Metals and Chemicals Co., Ltd.
    Inventors: Masahito Osawa, Hidenori Tomioka, Naoyoshi Terashita, Noboru Hayami, Shigeru Tsunokake
  • Magnesium-based hydrogen storage alloys
    Publication number: 20020197181
    Abstract: Magnesium-based hydrogen storage alloys comprise a metallic magnesium (Mg) and a magnesium-containing intermetallic compound (MgxMy wherein y is 1-x) and contain not less than 60 mass % of magnesium in total, and have a phase of a primarily crystallized magnesium-containing intermetallic compound in its solidification structure.
    Type: Application
    Filed: April 25, 2002
    Publication date: December 26, 2002
    Applicant: JAPAN METALS AND CHEMICALS CO., LTD.
    Inventors: Masahito Osawa, Hidenori Tomioka, Naoyoshi Terashita, Noboru Hayami, Shigeru Tsunokake