Patents by Inventor Yongshao Liu

Yongshao Liu 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).

  • Oripavine derivatives and their uses as pharmaceuticals
    Patent number: 7119100
    Abstract: The present invention relates to oripavine derivatives of formula (I), wherein R1 is hydrogen or methyl, R2 is methyl, cyclopropyl methyl, cyclobutyl methyl or allyl, R3 is thiophenyl ethyl or cycloalkyl methyl where the cycloalkyl has 3 to 6 carbon atoms, or non-toxic pharmaceutically acceptable salts thereof. These compounds can be used for the preparation of analgesics or abstinence agents of opium habit-forming drugs.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: October 10, 2006
    Assignees: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences, P.L.A. China, Zhejiang Xianju Pharmaceuticals Co. Ltd.
    Inventors: Bohua Zhong, Zehui Gong, Yaping Wang, Yongshao Liu
  • Oripavine derivatives and their uses as medicines
    Publication number: 20050070564
    Abstract: The present invention relates to oripavine derivatives of formula (I), wherein R1 is hydrogen or methyl, R2 is methyl, cyclopropyl methyl, cyclobutyl methyl or allyl, R3 is thiophenyl ethyl or cycloalkyl methyl where the cycloalkyl has 3 to 6 carbon atoms, or nontoxic pharmaceutically acceptable salts thereof. These compounds can be used for the preparation of analgesics or abstinence agents of opium habit-forming drugs.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 31, 2005
    Inventors: Bohua Zhong, Zehui Gong, Yaping Wang, Yongshao Liu