Electrochemical controlled release drug delivery system
Patent 4585652 Issued on April 29, 1986. Estimated Expiration Date: 
November 19, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 19, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIontophoresis apparatus for applying local anesthetics Implantable dosing device Adsorption onto charcoal cloth Drug dispensing body implantable lead Patent #: 4506680 InventorsAssigneeApplicationNo. 06/673522 filed on 11/19/1984US Classes:604/891.1, Implanted dynamic device or system204/230.2, With current, voltage, or power control means205/688, Organic424/424, Membrane or diffusion barrier424/449, Transdermal or percutaneous424/78.19, Heterocyclic monomer424/78.22Nitrogen heterocycleExaminersPrimary: Niebling, John F.Assistant: Chapman, Terryence Attorney, Agent or FirmInternational ClassA61K 9/00 (20060101)AbstractA method is disclosed for the controlled delivery of an ionic bioactive chemical into a physiological medium comprising ionically binding the chemical to redox sites on a charged polymer and releasing the bound chemical into the medium by neutralizing the charge on the polymer.Other References
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