Patents by Inventor Masaaki, all of Ishizuka

Masaaki, all of Ishizuka 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).

  • Antitumor antibiotics MA 144-M.sub.1 and MA 144-M.sub.2
    Patent number: 4144329
    Abstract: New antitumor agents designated MA 144-M.sub.1 and MA 144-M.sub.2, which are anthracycline glycosides and inhibit the growth of gram-positive bacteria, e.g. Staphyococcus aureaus, Bacillus subtilis and Sarcina lutea, and inhibit the growth of animal tumors such as leukemia L 1210, P 388 and sarcoma 180 are produced by fermentation of MA 144-producing strains of streptomyces and by the chemical or enzymatic conversion of aclacinomycin A or cinerubin A.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: March 13, 1979
    Assignee: Zaidan Hojin Biseibutsu Kagaku KenkyuKai
    Inventors: Hamao Umezawa, Tomio Takeuchi, Hiroshi Naganawa, Masaaki, all of Ishizuka, Norio Shibamoto, Toshikazu Oki, Taiji Inui