Patents by Inventor Shoichi Oonishi

Shoichi Oonishi 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).

  • Agent for removing phosphates, nitrates and nitrites from wastewater
    Patent number: 5976401
    Abstract: A method for treating phosphate-containing waste water comprising treating phosphate-containing waste water with a metal hydroxide complex as a phosphate adsorbent represented by the formula:M.sub.1-x.sup.2+ M.sub.x.sup.3+ (OH.sup.-).sub.2+x-y (A.sup.n-).sub.y/nwherein M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mg.sup.2+, Ni.sup.2+, Zn.sup.2+, Fe.sup.2+, Ca.sup.2+ and Cu.sup.2+ ; M.sup.3+ is at least one divalent metal ion selected from the group consisting of Al.sup.3+ and Fe.sup.3+ ; A.sup.n- is an n-valent anion; x is in the range 0.1.ltoreq.x.ltoreq.0.5; y is in the range 0.1.ltoreq.y.ltoreq.0.5; and n is 1 or 2.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: November 2, 1999
    Assignee: Tomita Pharmaceutical Co., Ltd.
    Inventors: Takashi Suzuki, Toshio Sato, Akira Ookubo, Tomohide Koizumi, Mikiko Mihara, Shoichi Oonishi