Patents by Inventor Yoko Tanaka

Yoko Tanaka 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).

  • 24,24-Difluoro-25-hydroxycholecalciferol
    Patent number: 4196133
    Abstract: The invention provides a new derivative of vitamin D.sub.3, 24,24-difluoro-25-hydroxycholecalciferol.The compound is characterized by vitamin D-like activity in its ability to increase intestinal calcium transport, increase serum calcium and inorganic phosphorous concentration and to prevent the development of rickets. It would find ready application as a substitute for vitamin D.sub.3 and in the treatment of disease states evincing calcium-phosphorous imbalance and which are non-responsive to vitamin D.sub.3 therapy.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: April 1, 1980
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Hector F. DeLuca, Nobuo Ikekawa, Yoko Tanaka, Yoshiro Kobayashi