Temperature activated controlled release
Patent 5580573 Issued on December 3, 1996. Estimated Expiration Date: 
December 3, 2013. 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.
December 3, 2013. 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 ReferencesActive compound release systems Temperature-controlled active agent dispenser Block copolymer matrix for transdermal drug release Tool pack apparatus Matrix for release of active ingredients Heat sealable membrane for transdermal drug release Patent #: 4951657 InventorsAssigneeApplicationNo. 088496 filed on 07/07/1993US Classes:424/449, Transdermal or percutaneous424/448, Pressure sensitive adhesive means424/486, Synthetic polymer424/487Acrylic acid and derivativesExaminersPrimary: Venkat, JyothsnaAttorney, Agent or FirmForeign Patent References
International ClassA61F 013/02AbstractA polymeric device for the controlled release of active agents contained in the device in which the polymer has a glass transition temperature greater than the normal storage or non use temperature of the device. When heated to or above the glass transition temperature of the polymer, the active agent is released. The release of active agent can be switched on or off by the adjustment of the temperature of the polymeric device above or below the glass transition temperature of the polymer. | |
