Patents by Inventor Takuji Kojima

Takuji Kojima 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).

  • Gel for radiation dosimeter and radiation dosimeter which uses the same
    Patent number: 8586366
    Abstract: Gel for radiation dosimeter including a gel part (A) and a gel part (B) that become cloudy when exposed to a fixed dose or more, wherein said gel part (A) exposed to more than a specified dose above the fixed dose maintains a cloudy state regardless of the decrease in external temperature; and said gel part (B) exposed to less than the specified dose above the fixed dose changes gradually from a cloudy state into a transparent state according to the decrease in external temperature.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: November 19, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Akihiro Hiroki, Naotsugu Nagasawa, Masao Tamada, Takuji Kojima, Yuichi Sato, Akio Ohta, Hisamichi Yamabayashi, Takayoshi Yamamoto
  • GEL FOR RADIATION DOSIMETER AND RADIATION DOSIMETER WHICH USES THE SAME
    Publication number: 20110312097
    Abstract: Gel for radiation dosimeter including a gel part (A) and a gel part (B) that become cloudy when exposed to a fixed dose or more, wherein said gel part (A) exposed to more than a specified dose above the fixed dose maintains a cloudy state regardless of the decrease in external temperature; and said gel part (B) exposed to less than the specified dose above the fixed dose changes gradually from a cloudy state into a transparent state according to the decrease in external temperature.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Inventors: Akihiro HIROKI, Naotsugu Nagasawa, Masao Tamada, Takuji Kojima, Yuichi Sato, Akio Ohta, Hisamichi Yamabayashi, Takayoshi Yamamoto
  • Molded dosimeter containing a rubber and powdered crystalline alanine
    Patent number: 4668714
    Abstract: An alanine dosimeter that enables accurate and simple measurement of the absorbed dose of an ionizing radiation is disclosed. The dosimeter uses as an alanine binder agent at least one member selected from among synthetic rubbers, and natural rubber.
    Type: Grant
    Filed: August 29, 1985
    Date of Patent: May 26, 1987
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Yousuke Morita, Tadao Seguchi, Takuji Kojima, Ryuichi Tanaka