Patents by Inventor Isao Maisubara

Isao Maisubara 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).

  • Process for producing fortimicin factors
    Patent number: 4145253
    Abstract: New antibiotic compounds, Fortimicin factors D and KE are produced by fermentation of microorganisms belonging to the genus Micromonospora. The antibiotic compounds are accumulated in the culture liquor and are isolated therefrom. A semisynthetic method of producing Fortimicin KE utilizing Fortimicin D is also disclosed.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: March 20, 1979
    Assignee: Abbott Laboratories
    Inventors: Takao Iida, Kunikatsu Shirahata, Isao Maisubara, Masahiro Sugimoto, Shinzo Ishii, Ryo Okachi, Takashi Nara