Patents Assigned to Kureha Kagaku Kogyo Kabushiki Kausha
  • Nitrogen-containing polysaccharide
    Patent number: 4851395
    Abstract: Disclosed is nitrogen-containing polysaccharide substantially free of units having a molecular weight below about 5,000, said nitrogen-containing polysaccharide having been extracted from Coriolus versicolor (Fr.) Quel., substantially all polymer units having a molecular weight below about 5,000 having been removed therefrom, which exhibits antitumor and immunological activity.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: July 25, 1989
    Assignee: Kureha Kagaku Kogyo Kabushiki Kausha
    Inventors: Saburo Ueno, Chikao Yoshikumi, Yoshio Omura, Takayoshi Fujii, Toshihiko Wada, Eiichi Takahashi, Fumio Hirose