Patents by Inventor Hoi Sing Chung

Hoi Sing Chung 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).

  • Plant extracts and alkaloids having antitussive activity
    Patent number: 6992078
    Abstract: The present invention provides plant extracts, isolated alkaloids, synthetic alkaloids and compositions having antitussive activity. In some preferred embodiments, the plant extracts and the isolated alkaloids are from a plant of a genus in the family Stemonaceae. In other preferred embodiments, the plant extracts and the isolated alkaloids are from a plant of the genus Stemona, Croomia, or Stichoneuron. In especially preferred embodiments, the plant extracts and the isolated alkaloids are from the plant Stemona tuberosa. The present invention further provides methods for isolating such plant extracts and alkaloids. In addition, the present invention provides methods for reducing or suppressing coughing by administering plant extracts, alkaloids and compositions having antitussive activity.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: January 31, 2006
    Assignee: The Chinese University of Hong Kong
    Inventors: Ge Lin, Hoi Sing Chung, Po Ming Hon, Hui Dong, Paul P. H. But
  • Plant extracts and alkaloids having antitussive activity
    Publication number: 20030229071
    Abstract: The present invention provides plant extracts, isolated alkaloids, synthetic alkaloids and compositions having antitussive activity. In some preferred embodiments, the plant extracts and the isolated alkaloids are from a plant of a genus in the family Stemonaceae. In other preferred embodiments, the plant extracts and the isolated alkaloids are from a plant of the genus Stemona, Croomia, or Stichoneuron. In especially preferred embodiments, the plant extracts and the isolated alkaloids are from the plant Stemona tuberosa. The present invention further provides methods for isolating such plant extracts and alkaloids. In addition, the present invention provides methods for reducing or suppressing coughing by administering plant extracts, alkaloids and compositions having antitussive activity.
    Type: Application
    Filed: April 24, 2002
    Publication date: December 11, 2003
    Applicant: The Chinese University of Hong Kong
    Inventors: Ge Lin, Hoi Sing Chung, Po Ming Hon, Hui Dong, Paul P.H. But