Patents by Inventor Bet-key Wong

Bet-key Wong 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).

  • Imide intermediates for the preparation of analgesic and/or antagonist octahydrobenzofuroisoquinolines
    Patent number: 4751306
    Abstract: Imide intermediates for the preparation of analgesic and/or antagonist octahydrobenzofuro[3,2-e]-isoquinolines and octahydro-4a,7-ethano- and ethenobenzofuro[3,2-e]isoquinolines and processes for their preparation are provided.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: June 14, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Engelbert Ciganek, Bet-key Wong