Patents Assigned to ALZA Corporatiton
  • Banded prolonged release active agent dosage form
    Patent number: 6020000
    Abstract: The present invention is directed to an active agent dosage form that is useful for the prolonged delivery of an active agent formulation to a fluid environment of use. The active agent dosage form is a matrix that has an insoluble material circumscribing a portion of the surface of the matrix. The invention is also directed to a method of making the active agent dosage form.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: February 1, 2000
    Assignee: ALZA Corporatiton
    Inventors: Patrick S.-L. Wong, David Emil Edgren, Liang C. Dong, Vincent Joseph Ferrari