Patents by Inventor Seizi Igarasi

Seizi Igarasi 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).

  • Polysaccharide beads
    Patent number: 4493894
    Abstract: A matrix comprising a water-insoluble .beta.-1,3-glucan gel in the shape of beads with diameters within the range of about 5 to 1000.mu. is prepared by, for example, dispersing an alkaline aqueous solution of a water-soluble .beta.-1,3-glucan in a water-immiscible organic solvent, and adding an organic acid to the resultant dispersion. The matrix is useful as carrier materials for immobilized enzymes, affinity chromatography, gel filtration, ion exchange and other applications.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: January 15, 1985
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yutaka Miyashiro, Masao Ogawa, Yoshio Yamazaki, Seizi Igarasi
  • Polysaccharide beads
    Patent number: 4143201
    Abstract: A matrix comprising a water-insoluble .beta.-1,3-glucan gel in the shape of beads with diameters within the range of about 5 to 1000 .mu. is prepared by, for example, dispersing an alkaline aqueous solution of a water-insoluble .beta.-1,3-glucan in a water-immiscible organic solvent, and adding an organic acid to the resultant dispersion. The matrix is useful as carrier materials for immobilized enzymes, affinity chromatography, gel filtration, ion exchange and other applications.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: March 6, 1979
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yutaka Miyashiro, Masao Ogawa, Yoshio Yamazaki, Seizi Igarasi
  • Phosphorylxylostasin
    Patent number: 3933790
    Abstract: Phosphoric acid esters of xylostasin, an intermediate for the synthesis of antibiotic deoxy-xylostasin or the like, are obtained by contacting xylostasin with cells or cell materials of microorganism belonging to the genus Escherichia or Pseudomonas which is resistant to xylostasin, in the presence of a phosphate donor.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: January 20, 1976
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Seizi Igarasi, Makoto Kida