Patents by Inventor Ann F. Hsu

Ann F. Hsu 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 dosage forms having immediate release and/or controlled release properties
    Patent number: 8007827
    Abstract: The present invention relates generally to pharmaceutical dosage forms comprising: an absorption window active agent; a controlled release component comprising enteric-coated controlled release beads, wherein the enteric-coated release beads comprise at least two pH-sensitive polymer layers. The controlled-release dosage forms provide good bioavailability of absorption window active agents.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: August 30, 2011
    Assignee: Impax Laboratories, Inc.
    Inventors: Chien-Hsuan Han, Larry Hsu, Ann F. Hsu
  • Combination immediate release controlled release levodopa/carbidopa dosage forms
    Patent number: 7094427
    Abstract: The present invention relates to dosage forms of a combination of carbidopa and levodopa comprising both immediate release and controlled release components for the treatment of ailments associated with depleted amounts of dopamine in a patient's brain tissue.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: August 22, 2006
    Assignee: Impax Laboratories, Inc.
    Inventors: Chien-Hsuan Han, Larry Hsu, Ann F. Hsu