Ocular therapeutic system with selected membranes for administering ophthalmic drug
Patent 4057619 Issued on November 8, 1977. Estimated Expiration Date: 
November 8, 1994. 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 8, 1994. 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 2200429 2396785 2947735 3710795 3854480 InventorsApplicationNo. 05/705470 filed on 07/15/1976US Classes:424/427OcularExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmInternational ClassA61K 9/00 (20060101)AbstractAn ocular therapeutic system for releasing a drug to the eye at a controlled and continuous rate for a prolonged period of time is disclosed. The system is shaped, sized and adapted for insertion and retention in the eye. The system contains an ophthalmically acceptable drug and it is formed of a polymeric material permeable to the passage of drug by diffusion. The material is an ethylene-vinyl ester copolymer of the general formula: ##STR1## WHEREIN R is hydrogen, alkyl of 2 to 7 carbons, or aryl, m is (4 to 80)% by weight and n is (100 - m)% by weight.Other References
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