Patents by Inventor Yee-Shing Wong

Yee-Shing 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).

  • Preparation of 4-acyloxyazetidinones from acyl nitrates and penams
    Patent number: 4554103
    Abstract: There is disclosed a high yielding process for cleaving penicillinates with acyl or aroyl nitrates to produce acyloxy or aroyloxy azetidinones which are intermediates in the multistep process for producing penems from penicillinates.
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: November 19, 1985
    Assignee: Schering Corporation
    Inventors: Martin Steinman, Yee-Shing Wong