Polymeric diffusion matrix containing estrogens
Patent 4438139 Issued on March 20, 1984. Estimated Expiration Date: 
January 4, 2002. 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.
January 4, 2002. 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 2127896 2138751 2155658 2160503 2340866 2491642 2693438 3287222 Flurandrenolide film formulation Polymeric diffusion matrix containing estradiol diacetate InventorsAssigneeApplicationNo. 06/439023 filed on 01/04/1982US Classes:514/177, Oxygen double bonded to a ring carbon of the cyclopentanohydrophenanthrene ring system424/486, Synthetic polymer514/182Oxygen single bonded to a ring carbon of the cyclopentanohydrophenanthrene ring systemExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmInternational ClassesA61K 9/00 (20060101)A61K 31/135 (20060101) A61K 9/70 (20060101) A61K 31/415 (20060101) A61K 31/565 (20060101) AbstractA polymeric diffusion matrix for the sustained release, intravaginal administration of an estrogen is provided. The matrix consists of polyvinylalcohol, polyvinylpyrrolidone and a polar plasticizer.Other References
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