Patents Assigned to Andex Pharmaceuticals, Inc.
  • Controlled release oral dosage form
    Patent number: 6156342
    Abstract: A controlled release dosage form for an analgesic that does not contain an expanding polymer and comprising a core containing the analgesic, preferably tramadol or it pharmaceutically acceptable deviates and a semipermeable membrane coating the core.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: December 5, 2000
    Assignee: Andex Pharmaceuticals, Inc.
    Inventors: Mongkol Sriwongjanya, Timothy Weng, Joseph Chou, Chih-Ming Chen