Patents by Inventor Satoshi Kezuka

Satoshi Kezuka 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 treating fluorine-containing waste solution
    Patent number: 6547969
    Abstract: A process and apparatus for treating a fluorine-containing waste solution that is able to maintain a high treatment volume while also facilitating easy maintenance. A calcium salt such as calcium hydroxide and an inorganic coagulant are added with timing to the fluorine-containing waste solution, followed by filtration of said waste solution by cross-flow filtration.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: April 15, 2003
    Assignee: Fujitsu Limited
    Inventor: Satoshi Kezuka
  • Treatment process for fluorine-containing water
    Patent number: 6331256
    Abstract: Fluorine-containing water is treated by contacting the fluorine-containing water with calcium carbonate to react the fluorine in the fluorine-containing water with the calcium carbonate and fix it as calcium fluoride. After the fluorine-containing water is contacted with the calcium salt in the reaction tank to react the fluorine in the fluorine-containing water with the calcium salt and fix it as calcium fluoride, it is subjected to solid/liquid separation, and the treated water is removed while a portion of the sludge concentrated by the solid/liquid separation is returned to the reaction tank.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: December 18, 2001
    Assignee: Fujitsu Limited
    Inventors: Satoshi Kezuka, Takayuki Sadakata