Patents by Inventor Rokuro Izumi

Rokuro Izumi 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).

  • Process for preparing an amino group-containing polyacrylonitrile polymer
    Patent number: 4486549
    Abstract: Acrylonitrile polymer containing amino groups and having a porous structure containing micro-pores with an average size of from 50 to 2000 .ANG. and pore volume of not less than 0.2 cm.sup.3 /g is prepared by reducing an acrylonitrile polymer having said porous structure in an inert non-solvent for said polymer with lithium aluminum hydride. The polymer obtained is useful as a carrier for enzymes.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: December 4, 1984
    Assignee: Toyo Jozo Company, Ltd.
    Inventors: Kunio Matsumoto, Rokuro Izumi, Hideji Seijo, Hiroyuki Mizuguchi
  • Immobilization of biological material with an acrylonitrile polymer
    Patent number: 4371612
    Abstract: Biological material such as enzymes is immobilized by adsorption or covalent bonding to a micro-porous water-insoluble acrylonitrile polymer containing from 20 .mu.M to 1000 .mu.M of amino groups per gram of the polymer. Covalent bonding may be carried out with a crosslinking or condensing agent. The amino groups may be introduced into the polymer by reduction of nitrile groups with lithium aluminum hydride in an inert non-solvent.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: February 1, 1983
    Assignee: Toyo Jozo Company, Ltd.
    Inventors: Kunio Matsumoto, Rokuro Izumi, Hideji Seijo, Hiroyuki Mizuguchi