Patents by Inventor Takatoshi Nagate

Takatoshi Nagate 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 preparing 14-hydroxy-6-O-methyl-erythromycin A
    Patent number: 4975370
    Abstract: Mucor circinelloides f. griseo-cyanus IFO 4563 is cultivated in a medium containing 6-O-methylerythromycin A as a substrate to obtain 14-hydroxy-6-O-methyl-erythromycin A. This compound and its salt have anti-bacterial activity.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: December 4, 1990
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Joji Sasaki, Kazutoshi Mizoue, Takashi Adachi, Takatoshi Nagate, Shigeo Morimoto, Sadafumi Omura
  • Novel amylase inhibitors
    Patent number: 4197292
    Abstract: Novel oligosaccharide substances, TAI-A and TAI-B, possessing a strong inhibitory activity to amylase and invertase are obtained by inoculating a seed of the strain of Streptomyces calvus TM-521 into aqueous nutrient medium, cultivating this with shaking or by a submerged culture method with aeration, and separating the produced amylase inhibitors TAI-A and TAI-B from the cultured broth.
    Type: Grant
    Filed: February 2, 1979
    Date of Patent: April 8, 1980
    Assignee: Taisho Pharmaceutical Co.
    Inventors: Kunio Kangouri, Shinjuro Namiki, Takatoshi Nagate, Kazuhiko Sugita, Sadafumi Omura