Patents by Inventor Feng-Tsun Lee

Feng-Tsun Lee 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).

  • Preparation of pyrocatecholic compounds
    Patent number: 5122461
    Abstract: The invention relates to a novel method for preparing pyrocatecholic compounds from monophenolic compounds using catalysis by monophenol monooxygenase in an aqueous solution containing metal ions. The metal ions form complexes with the pyrocatecholic products. This method increases the yield of pyrocatecholic products. In particular, the method of the instant invention can be used to increase the yield of L-DOPA, a drug used in the treatment of Parkinson's disease.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: June 16, 1992
    Assignee: Industrial Technology Research Institute
    Inventors: Kuang-Pin Hsiung, Feng-Tsun Lee, Chung-Long Hsieh