Patents by Inventor Toshio Niijima

Toshio Niijima 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 WASTE WATER CONTAINING A RESIN
    Publication number: 20010052499
    Abstract: A process for treating waste water containing a resin is disclosed, which includes the steps of adding a polyamine compound to waste water containing at least a resin to coagulate at least water-insoluble matter in the water to form coagulated particles, adding a polyacrylamide polymer to cause those particles to grow into flocculated flocs, and separating the flocculated flocs. The process of the invention can treat waste water containing a resin in an industrially beneficial way without producing a large amount of sludge is disclosed.
    Type: Application
    Filed: September 10, 1999
    Publication date: December 20, 2001
    Applicant: TOSHIO NIIJIMA
    Inventor: TOSHIO NIIJIMA
  • Process for treating waste water containing a resin
    Patent number: 6325936
    Abstract: A process for treating waste water containing a resin is disclosed, which includes the steps of adding a polyamine compound to waste water containing at least a resin to coagulate at least water-insoluble matter in the water to form coagulated particles, adding a polyacrylamide polymer to cause those particles to grow into flocculated flocs, and separating the flocculated flocs. The process of the invention can treat waste water containing a resin in an industrially beneficial way without producing a large amount of sludge is disclosed.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: December 4, 2001
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Toshio Niijima