Patents Assigned to Sachiko Yamada
  • Composition for improving calcium metabolism
    Patent number: 5756488
    Abstract: A composition for improving calcium metabolism comprising, as an active ingredient, (20S,22R)-22-methyl-1.alpha.,25-dihydroxyvitamin D.sub.3 ; and a method of treating a calcium metabolism disorder in a mammal comprising administering a therapeutically effective amount of (20S,22R)-22-methyl-1.alpha.,25-dihydroxyvitamin D.sub.3.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: May 26, 1998
    Assignees: Kuraray Co., Ltd., Sachiko Yamada
    Inventor: Sachiko Yamada
  • Novel vitamin D.sub.3 derivative and process for preparing the same
    Patent number: 4284577
    Abstract: A novel vitamin D.sub.3 derivative of the formula ##STR1## (wherein R.sub.1 is hydrogen or a hydroxyl group) which exhibits strong biological activity like that of vitamin D and is useful as a medicine; and a process for producing the same are disclosed.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: August 18, 1981
    Assignees: Sachiko Yamada, Hiroaki Takayada
    Inventors: Sachiko Yamada, Masayuki Ohmori, Hiroaki Takayama