Patents by Inventor Shu Shu Yang

Shu Shu Yang 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).

  • Ester derivatives of 4-aza-steroids
    Patent number: 5610162
    Abstract: Compounds of Formula (I), ##STR1## wherein X is sulfur or oxygen are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: March 11, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Gary H. Rasmusson, Richard L. Tolman, Shu Shu Yang
  • 17-Ethers and thioethers of 4-aza-steroids
    Patent number: 5536727
    Abstract: Compounds of Formula I ##STR1## wherein Z contains an ether or thioether moeity, are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: July 16, 1996
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Richard L. Tolman, Gary H. Rasmusson, Raman K. Bakshi, Shu Shu Yang
  • Blocked cholecalciferol and dihydrotachysterol 3 derivatives
    Patent number: 4069321
    Abstract: Novel cholecalciferol and dihydrotachysterol.sub.3 derivatives produced against metabolic conversions at the 25-position, their preparation, pharmaceutical compositions, methods of treating steroid-induced osteoporosis, senile osteoporosis and secondary hyperparathyroidism, especially that induced by an insufficient amount of calcium in relationship to the amount of phosphate, novel intermediates and their preparation are disclosed.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: January 17, 1978
    Assignee: Merck & Co., Inc.
    Inventors: Howard Jones, Shu Shu Yang, David P. Jacobus