Patents by Inventor Mitsuaki Handa

Mitsuaki Handa 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).

  • Anti-tumor preparation against certain tumors and process for preparing the same
    Patent number: 4349541
    Abstract: An anti-tumor preparation containing cells of Streptococcus equisimilis and a process for preparing the preparation which comprises subjecting the cells to heat treatment in a salt solution with or without penicillin treatment.
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: September 14, 1982
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yasuhisa Takeda, Takashi Matsuno, Mihoko Ohtaka, Hiroki Mitsui, Tsutomu Kawaguchi, Hisako Masuda, Hiroshi Okazaki, Mitsuaki Handa, Yutaka Sugawara, Haruki Ogawa
  • Anti-tumor substance and process for preparing the same
    Patent number: 4242326
    Abstract: An anti-tumor substance which is not only heatstable but also has low inflaming and pain-inducing properties and low pyrogenic activity is disclosed. The substance is prepared by disrupting cells of bacteria belonging to hemolytic streptococci, extracting from the disrupted material a water-insoluble substance and treating the substance with one or more proteases and, optionally, with one or more nucleases.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: December 30, 1980
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yutaka Sugawara, Akihiro Yamamoto, Mitsuaki Handa, Hiroko Usami, Haruki Ogawa