Patents by Inventor Atsuko Morikawa

Atsuko Morikawa 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).

  • Antibiotic XK-62-2 and process for production thereof
    Patent number: 4045298
    Abstract: The antibiotic XK-62-2 is produced by fermentation of microorganisms belonging to the genus Micromonospora. The antibiotic is accumulated in the culture liquor and is isolated therefrom.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: August 30, 1977
    Assignee: Abbott Laboratories
    Inventors: Takashi Nara, Seigo Takasawa, Ryo Okachi, Isao Kawamoto, Mitsuyoshi Yamamoto, Seiji Sato, Tomoyasu Sato, Atsuko Morikawa
  • Antibiotics designated XK-88 series
    Patent number: 4045610
    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.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: August 30, 1977
    Assignee: Abbott Laboratories
    Inventors: Takashi Nara, Seigo Takasawa, Ryo Okachi, Isao Kawamoto, Mitsuyoshi Yamamoto, Seiji Sato, Tomoyasu Sato, Atsuko Morikawa
  • 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