Patents by Inventor Yasujiro Fujii

Yasujiro Fujii 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).

  • Water treating method
    Patent number: 6464877
    Abstract: The present invention relates to a water treatment process comprising adding ozone to raw water and filtering the raw water using an ozone-resistant membrane, wherein a concentration of ozone present in the water filtered through the ozone-resistant membrane is detected and an amount of ozone to be fed into raw water is continuously and automatically controlled so as to adjust an ozone concentration to a prescribed value.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: October 15, 2002
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshihiko Mori, Yasujiro Fujii