Patents by Inventor Yasuhiko Shoda

Yasuhiko Shoda 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 FOR TREATING SCALES
    Publication number: 20130072418
    Abstract: Provided is a method for treating scales (101) that have formed on the outer surface of a heat-conducting tube (111) and in a hole (112a) of a tube support plate (112) etc. of a steam generator of a nuclear power plant. The scales (101) are embrittled and also converted to a porous state by bringing the scales (101) into contact with a treatment solution, which contains 0.5 to 3.5 wt % of an organic acid and is at a pH of 2 to 3.5, for 2 to 30 days at 20° C. to 40° C.
    Type: Application
    Filed: January 31, 2011
    Publication date: March 21, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Nobuo Ishihara, Hirokazu Miyata, Yasuhiko Shoda, Hiroyuki Fujiwara
  • Water Treatment Process for Steam Plant
    Publication number: 20100163399
    Abstract: In a steam plant, scale adhesion to the inside of a specific device is prevented, while reducing the amount of an agent such as hydrazine to the lowest possible level. A temporary change in the chemical environment or an approximately periodic variation in the chemical environment is brought about in a channel (21) inside the prescribed device, during operation of the steam plant.
    Type: Application
    Filed: August 28, 2007
    Publication date: July 1, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Nobuo Ishihara, Sumio Yamauchi, Kazutoyo Murata, Masato Kanedome, Yasuhiko Shoda, Katsuhiko Yamakami