Patents by Inventor Yasuaki Ogawa

Yasuaki Ogawa 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 SF-1942 substance and process for production of the same
    Patent number: 4202886
    Abstract: An antibiotic SF-1942 substance produced by cultivating an SF-1942 substance producing strain of the genus Streptomyces in a nutrient medium under aerobic conditions to produce and accumulate the SF-1942 substance in the nutrient medium and isolating the SF-1942 substance from the fermentation broth followed by purification and a process for the production of the antibiotic SF-1942 substance. The SF-1942 substance is effective as an antimicrobial agent and an antitumor agent against Sarcoma 180 tumor cells in mice.
    Type: Grant
    Filed: May 2, 1978
    Date of Patent: May 13, 1980
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Kazunori Ohba, Takashi Shomura, Yasuaki Ogawa, Takashi Tsuruoka, Hiroshi Watanabe, Takashi Hisamatsu, Shingo Uchida, Michio Kojima, Shigeharu Inouye
  • Novel antibiotics derivatives and process for preparing the same
    Patent number: 4103083
    Abstract: Novel antibiotics derivatives 7-(5-acylamido-5-carboxyvaleramido)-3-(.alpha.-methoxy-p-acyloxycinnamoylo xymethyl)-7-methoxy-3-cephem-4-carboxylic acids and the salts thereof which are useful as antibiotics and intermediates for the preparation of cephamycin derivatives, a process for preparing the same, and a process for recovering the cephamycin derivatives effectively and stably from the fermentation broth in the form of an N-acyl derivative.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: July 25, 1978
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Yasuaki Ogawa, Yasumitsu Kondo, Takashi Shomura, Takashi Tsuruoka, Shigeharu Inouye, Taro Niida
  • Antibiotic SF-1623 substance and the production thereof
    Patent number: 4076588
    Abstract: A new antibiotic designated as SF-1623 substance exhibiting a useful antibacterial activity against gram-negative bacteria is now produced by cultivating a new strain ATCC 21999 of the known species Streptomyces chartreusis. The SF-1623 substance in the form of its an alkali metal salt may be recovered from the culture when the cultivation is effected under aerobic conditions in the presence of an alkali metal thiosulfate.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: February 28, 1978
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Shigeharu Inouye, Takashi Shomura, Michio Kojima, Yasuaki Ogawa, Hiroshi Watanabe, Yasumitsu Kondo, Kazuo Saito, deceased, Yujiro Yamada, Taro Niida
  • Antibiotic SF-1623 substance
    Patent number: 4010155
    Abstract: A new antibiotic designated as SF-1623 substance exhibiting a useful antibacterial activity against gram-negative bacteria is now produced by cultivating a new strain ATCC 21999 of the known species Streptomyces chartreusis. The SF-1623 substance in the form of its an alkali metal salt may be recovered from the culture when the cultivation is effected under aerobic conditions in the presence of an alkali metal thiosulfate.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: March 1, 1977
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Shigeharu Inouye, Takashi Shomura, Michio Kojima, Yasuaki Ogawa, Hiroshi Watanabe, Yasumitsu Kondo, Kazuo Saito, deceased, Yujiro Yamada, Taro Niida
  • Process for the production of cephamycin type antibiotic substances
    Patent number: 3975235
    Abstract: Novel 7-(5-amino-5-carboxyvaleramido)-7-methoxy-3-hydroxymethyl-3-cephem-4-carbo xylic acid derivatives. Such derivatives are prepared by subjecting cephamycin type compounds to the action of esterase enzyme of mold fungi.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: August 17, 1976
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Tomizo Niwa, Hitoshi Goi, Takashi Shomura, Yasuaki Ogawa, Shigeharu Inouye, Kazuo Saito, deceased, Taro Niida
  • Process for preparing a cephamycin type antibiotic substance
    Patent number: 3974035
    Abstract: This invention relates to a process for preparing a cephamycin type antibiotic substance which comprises cultivating a microorganism belonging to the genus Streptomyces under aerobic conditions and a primary object of this invention is to provide a process for preparing the said product on a simple and industrial scale.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: August 10, 1976
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Takashi Shomura, Hiroshi Watanabe, Yasuaki Ogawa, Kazunori Ohba, Yasumitsu Kondo, Michio Kojima, Shigeharu Inoje, Taro Niida