Therapeutic agent delivery system
Patent 4894231 Issued on January 16, 1990. Estimated Expiration Date: 
July 28, 2007. 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.
July 28, 2007. 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 References 3279996 3854480 Self-monitored device for releasing agent at functional rate Anticoccidium implants Drug excipient of silicone rubber Biodegradable, implantable drug delivery device, and process for preparing and using the same Process for preparation of microcapsules Patent #: 4622244 InventorsAssigneeApplicationNo. 078534 filed on 07/28/1987US Classes:424/426, Errodable, resorbable, or dissolving424/422, Implant or insert424/484, Matrices424/502, Contains waxes, higher fatty acids, higher fatty alcohols427/2.21Retarded or controlled-release layer produced (e.g., enteric)ExaminersPrimary: Page, Thurman K.Attorney, Agent or FirmInternational ClassesA61F 002/00A61K 009/14 AbstractA therapeutic agent delivery system that includes a biodegradable polymer and a therapeutic agent, the delivery system being coated with a barrier substance that decreases the quantity of the agent released from the system, compared to the quantity of the agent released from a system not coated with the substance, in the forty-eight hours subsequent to the parenteral injection or implantation of the system into a living person or animal.Other References
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