Patents by Inventor Andrew B. C. Yu

Andrew B. C. Yu 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).

  • Sustained-release pharmaceutical tablet and process for preparation thereof
    Patent number: 4415547
    Abstract: A sustained-release pharmaceutical tablet consisting essentially of drug pellets encapsulated with a water-soluble film-forming substance and a water-insoluble film-forming substance and blended and compressed into tablet form with a compressible tableting mixture and a process for preparation thereof are disclosed.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: November 15, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Andrew B. C. Yu, Phillip M. John