Patents by Inventor Lizbeth B. Sherman

Lizbeth B. Sherman 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).

  • Pharmaceutical formulation having enhanced bile acid binding affinity
    Patent number: 5569452
    Abstract: A pharmaceutical formulation comprising a polymeric resin having bile acid binding properties in combination with at least one bile acid binding material which enhances the bile acid binding affinity and/or capacity of the formulation, methods for preparing the formulations and methods for using the formulations.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 29, 1996
    Assignee: TSRL, Inc.
    Inventors: Gordon L. Amidon, Lizbeth B. Sherman, John R. Crison
  • Multi stage drug delivery system
    Patent number: 5387421
    Abstract: A drug delivery system includes a first capsule half having an inner chamber for containing a drug therein. A plug is disposed in a passageway of the capsule half for plugging the opening thereof. The plug is releasable from the passageway opening upon the application of pressure from within the inner chamber. A pump mechanism causes an increase in pressure within the inner chamber and forces the plug out of the passageway to release the drug from the inner chamber and out of the passageway thereby providing a second pulse of drug release at a predetermined time after initial ingestion of the capsule. The invention further provides a method of manufacturing the drug delivery system and method by which the drug delivery system provides the drug to the body.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: February 7, 1995
    Assignee: TSRL, Inc.
    Inventors: Gordon L. Amidon, Glen D. Leesman, Lizbeth B. Sherman