Patents by Inventor Seiji Shida

Seiji Shida 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).

  • Patent number: 4165281
    Abstract: A method and a unit for wastewater treatment with microorganisms, in which at least one non-woven fibrous mat having a three-dimensional network structure is disposed as a supporting media in an aeration tank, microorganisms are retained on the surface of and in the interstices of the non-woven fibrous mat, and organic polluting matter in the wastewater is oxidatively decomposed by the microorganisms in the presence of oxygen.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: August 21, 1979
    Assignee: Niigata Engineering Co., Ltd.
    Inventors: Kiyoshi Kuriyama, Munetaka Sato, Tsuneo Matsuzaki, Masanori Honma, Seiji Shida