Patents by Inventor De-Hua Li

De-Hua Li 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).

  • Patent number: 5064823
    Abstract: Pentacyclic triterpenoid compounds such as .alpha. boswelic acid and its acetate, .beta.-boswellic acid and its acetate, which have an inhibitory effect on topoisomerase I and topoisomerase II, are disclosed. Compositions based on the pentacyclic triterpenoid compounds which can be used to treat various cancers in mammals are also disclosed.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: November 12, 1991
    Assignee: Research Triangle Institute
    Inventors: Yue-Wei Lee, Qi-Cheng Fang, Zhen-Guo Wang, De-Hua Li, C. E. Cook