Patents by Inventor Yoshimitu Sekiguchi

Yoshimitu Sekiguchi 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 of treating waste water containing surfactant and heavy metals
    Patent number: 4005009
    Abstract: A method of treating a waste water containing anionic surfactant and heavy metals, which comprises the steps of: adding a specific inorganic coagulant and a specific salt to said waste water so as to make the respective concentration of said inorganic coagulant and inorganic salt in the waste water be at prescribed levels, adjusting the pH value to be in the range of from 5 to 10 after adding said inorganic coagulant, further adding a cationic coagulant so as to make its concentration be at a prescribed level, and treating the thus processed waste water through the foam separating process.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: January 25, 1977
    Assignee: Lion Fat & Oil Co., Ltd.
    Inventors: Mototaka Kinoshita, Yoshimitu Sekiguchi, Susumu Ando