Patents by Inventor Mitsuji Hirohashi

Mitsuji Hirohashi 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).

  • High-strength and high-toughness magnesium alloy and method for manufacturing same
    Patent number: 8333924
    Abstract: Provided is a high-strength and high-toughness magnesium alloy which has practical level of both the strength and the toughness for expanded applications of the magnesium alloys, and is a method for manufacturing thereof. The high-strength and high-toughness magnesium alloy of the present invention contains: a atom % in total of at least one metal of Cu, Ni, and Co; and b atom % in total of at least one element selected from the group consisting of Y, Dy, Er, Ho, Gd, Tb, and Tm, while a and b satisfying the following formulae (1) to (3), 0.2?a?10??(1) 0.2?b?10??(2) 2/3a?2/3<b.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: December 18, 2012
    Assignees: National University Corporation Kumamoto University, Chiba University
    Inventors: Yoshihito Kawamura, Michiaki Yamasaki, Takaomi Itoi, Mitsuji Hirohashi
  • High-Strength And High-Toughness Magnesium Alloy And Method For Manufacturing Same
    Publication number: 20090035171
    Abstract: Provided is a high-strength and high-toughness magnesium alloy which has practical level of both the strength and the toughness for expanded applications of the magnesium alloys, and is a method for manufacturing thereof. The high-strength and high-toughness magnesium alloy of the present invention contains: a atom % in total of at least one metal of Cu, Ni, and Co; and b atom % in total of at least one element selected from the group consisting of Y, Dy, Er, Ho, Gd, Tb, and Tm, while a and b satisfying the following formulae (1) to (3), 0.2?a?10??(1) 0.2?b?10??(2) 2/3a?2/3<b.
    Type: Application
    Filed: March 20, 2007
    Publication date: February 5, 2009
    Inventors: Yoshihito Kawamura, Michiaki Yamasaki, Takaomi Itoi, Mitsuji Hirohashi