Patents by Inventor Tatsuo Sumino

Tatsuo Sumino 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).

  • Immobilization of microorganisms by entrapment
    Patent number: 4791061
    Abstract: Microorganisms such as in activated sludge are immobilized by forming a mixture containing the microorganisms, a monomer or prepolymer and alginic acid or water soluble alignate, and dropping the mixture into a water solution of polyvalent metal ion and a polymerization initiator to form particles containing the microorganisms. Preferably, the monomer is an acrylamide monomer, the prepolymer is an ester of an acrylic acid group and polyethylene glycol and the polymerization initiator is a persultate. By this method, the microorganisms are protected from toxic substances such as the polymerization initiator during immobilization.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: December 13, 1988
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Sumino, Yasutomo Ohtake, Hiroki Nakamura, Masahiro Kon, Naomichi Mori, Kazuo Nakajima