Patents by Inventor Lianzhi Chen

Lianzhi Chen 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).

  • Steroids, their preparation, pharmaceutical compositions thereof and uses of the compounds
    Patent number: 6514956
    Abstract: The present invention concerns with steroid compounds of formula (I) wherein R1 is cyclohexyl or cycloheptyl, R2 is hydrogen or C1-C6 alkyl, R3 is hydrogen, C1-C6 alkyl or methylol, R4 is hydrogen or hydroxymethylene and a pharmaceutically acceptable salt thereof. The invention also concerns with a method for preparation of the compounds, pharmaceutical compositions containing the compounds as its active component and use of the compounds and the pharmaceutical compositions in preparing medicines for treating diseases, e.g. those associated with progestin dependence.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: February 4, 2003
    Assignees: Shanghai Zhongxi Pharmaceutical Co., Ltd., Xianju Pharmaceutical Co., Ltd.
    Inventors: Lianzhi Chen, Lin Zuo, Mingwai Wang, Zhengyu Ye, Wenliung Chen