Patents by Inventor Soichi Yatagai

Soichi Yatagai 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).

  • Process for purifying contaminated soil or groundwater with iron particles
    Patent number: 7220366
    Abstract: Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of ?-Fe phase and Fe3O4 phase, and having a BET specific surface area of 5 to 60 m2/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: May 22, 2007
    Assignee: Toda Kogyo Corporation
    Inventors: Masayuki Uegami, Junichi Kawano, Tomoko Okita, Yasuhiko Fujii, Kenji Okinaka, Koji Kakuya, Soichi Yatagai
  • Iron particles for purifying contaminated soil or ground water
    Publication number: 20060163172
    Abstract: Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of ?-Fe phase and Fe3O4 phase, and having a BET specific surface area of 5 to 60 m2/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.
    Type: Application
    Filed: March 7, 2006
    Publication date: July 27, 2006
    Applicant: TODA KOGYO CORPORATION
    Inventors: Masayuki Uegami, Junichi Kawano, Tomoko Okita, Yasuhiko Fujii, Kenji Okinaka, Koji Kakuya, Soichi Yatagai
  • Iron particles for purifying contaminated soil or ground water, process for producing the iron particles, purifying agent comprising the iron particles, process for producing the purifying agent and method of purifying contaminated soil or ground water
    Publication number: 20030217974
    Abstract: Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of &agr;-Fe phase and Fe3O4 phase, and having a BET specific surface area of 5 to 60 m2/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.
    Type: Application
    Filed: December 3, 2002
    Publication date: November 27, 2003
    Inventors: Masayuki Uegami, Junichi Kawano, Tomoko Okita, Yasuhiko Fujii, Kenji Okinaka, Koji Kakuya, Soichi Yatagai