Patents by Inventor Tokio Onta

Tokio Onta 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 product produced by streptococcus pyogenes and method of purification
    Patent number: 5559211
    Abstract: A biologically active, stable protein with a molecular weight of 20,000 to 30,000 and an isoelectric point of 8.0-10.0 is produced from the culture fluid of Streptococcus pyogenes and purified. The purified biologically active protein produces lymphocyte proliferation, provides protection against bacterial and viral infection and restricts minor metastasis.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: September 24, 1996
    Assignee: Kabushiki Kaisha Saikin Kagaku Kenkyujo
    Inventors: Katsuo Kumagai, Hidemi Rikiishi, Keiji Tamura, Shunji Sugawara, Eiji Nemoto, Shigefumi Okamoto, Tokio Onta