Structured bioerodible drug delivery device
Patent 3962414 Issued on June 8, 1976. Estimated Expiration Date: 
June 8, 1993. 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.
June 8, 1993. 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 3640741 3755558 3773919 3826258 InventorApplicationNo. 517982 filed on 10/25/1974US Classes:424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/469, Discrete particles in supporting matrix424/480, Cellulose or derivative424/481Containing natural gums or resinsExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmAbstractA drug delivery device for the continuous and controlled administration of a predetermined therapeutically effective dosage of eye drug to the eye of a mamallian patient over a prolonged period of time. The device meters the flow of polylactic acid polymer micro-encapsulated eye drug by means of a drug release rate controlling material comprised of an anionic polyvalent metal cation cross-linked polyelectrolyte. The device bioerodes in the biological environment of the patient concurrently with the dispensing or at a point in time after the dispensing of the therapeutically desired amount of drug. | |
