Patents by Inventor Charles S. L. Chiao

Charles S. L. Chiao 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).

  • Controlled release tablet formulation
    Patent number: 5458887
    Abstract: The present invention is directed to a controlled release dosage form which may be made using an osmotic core which contains a drug containing phase which includes a water swellable component and a continuous coating which comprises a major amount of a water resistant polymer and a minor amount of a non-toxic, water soluble, pharmaceutically acceptable compound.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: October 17, 1995
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Chih-Ming Chen, Charles S. L. Chiao, Jose Suarez
  • Controlled release hydrogel formulation
    Patent number: 5419917
    Abstract: The invention is directed to a method for the modification of the rate of release of a drug from a hydrogel which is based on the use of an effective amount of a pharmaceutically acceptable ionizable compound that is capable of providing a substantially zero-order release rate of drug from the hydrogel.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: May 30, 1995
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Chih-Ming Chen, Charles S. L. Chiao