Patents by Inventor Takashi Nara

Takashi Nara 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).

  • Fortimicin A
    Patent number: 3976768
    Abstract: A new antibiotic, Fortimicin A, is produced by fermentation of a microorganism belonging to the genus Micromonospora. The antibiotic is accumulated in the culture medium and is isolated therefrom.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: August 24, 1976
    Assignee: Abbott Laboratories
    Inventors: Takashi Nara, Seigo Takasawa, Ryo Okachi, Isao Kawamoto, Mitsuyoshi Yamamoto, Seiji Sato, Tomoyasu Sato
  • Antibiotics designated XK-88 series and process for production thereof
    Patent number: 3939043
    Abstract: A novel series of antibiotics designated the XK-88 series are produced by culturing a microorganism belonging to the genus Streptomyces in a nutrient medium and thereafter recovering the antibiotics from the culture liquor.BACKGROUND OF THE INVENTIONThe present invention relatees to novel antibiotics and a process for the production thereof. More specifically the present invention relates to novel antibiotics designated, XK-88-1, XK-88-2, XK-88-3 and XK-88-5 and a process for producing such antibiotics.Antibiotics which exhibit activity against a borad spectrum of bacteria are always in demand. To this end, a new species of microorganism has been isolated from soil located in Tajima-cho, Hofu-shi, Yamaguchi-ken, Japan. This new species, when cultured, produces a series of new antibiotics, the XK-88 series, all of which exhibit strong antibacterial activity against various Gram-positive and Gram-negative bacteria.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: February 17, 1976
    Assignee: Abbott Laboratories
    Inventors: Takashi Nara, Seigo Takasawa, Ryo Okachi, Isao Kawamoto, Mitsuyoshi Yamamoto, Seiji Sato, Tomoyasu Sato, Atsuko Morikawa
  • Fortimicin B and process for production thereof
    Patent number: 3931400
    Abstract: A new antibiotic, Fortimicin B, is produced by fermentation of a microorganism belonging to the genus Micromonospora. The antibiotic is accumulated in the culture medium and is isolated therefrom.
    Type: Grant
    Filed: April 5, 1974
    Date of Patent: January 6, 1976
    Assignee: Abbott Laboratories
    Inventors: Takashi Nara, Seigo Takasawa, Ryo Okachi, Isao Kawamoto, Mitsuyoshi Yamamoto