Patents by Inventor Humio Osaki

Humio Osaki 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).

  • Biologically active peptides which inhibit toxoplasma multiplication
    Patent number: 4897463
    Abstract: Biologically active peptides each having an activity to inhibit multiplication of toxoplasma and having a structure composed of amino acid sequence by the formula Gly-Glu-Glu-Glu-Glu-Glu; Glu-Glu-Glu-Glu-Glu; Asp-Asp-Asp-Asp-Asp; or Ala-Asp-Asp-Asp-Asp-Asp. These peptides are estimated to form active units or cores of Obioactin. The peptides may be applied in various dosage forms to human being and animals as immunoregulators against attack by toxoplasma, since they exhibit no specie specificity and have Toxo-GIF activities of 10 or more times on weight basis, and 40 or more time on molar basis, of that of the crude Obioactin.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: January 30, 1990
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Naoyoshi Suzuki, Humio Osaki
  • Biologically active substance, process for preparing the substance and immunoactive composition
    Patent number: 4621054
    Abstract: This invention relates to a biologically active substance which is a glycoprotein having a molecular weight of 3,000 to 5,000 and has activity to inhibit toxoplasma multiplication in homologous cells and heterologous cells.This invention also relates to a process for preparing the substance, immunoactive compositions containing the substance and use of the substance as a drug.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: November 4, 1986
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Naoyoshi Suzuki, Tsuneo Hirose, Humio Osaki
  • Biologically active substance, process for preparing the substance and immunoactive composition
    Patent number: 4482543
    Abstract: This invention relates to a biologically active substance which is a glycoprotein having a molecular weight of 3,000 to 5,000 and has activity to inhibit toxoplasma multiplication in homologous cells and heterologous cells.This invention also relates to a process for preparing the substance, immunoactive compositions containing the substance and use of the substance as a drug.
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: November 13, 1984
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Naoyoshi Suzuki, Tsuneo Hirose, Humio Osaki