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US Patent 4438139 - Polymeric diffusion matrix containing estrogens
US Patent Issued on March 20, 1984
Estimated Patent Expiration Date:
January 4, 2002Estimated 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.
Estimated Patent Expiration Date:
January 4, 2002Estimated 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.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
| 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 FirmUS Patent References2127896, 2138751, 2155658, 2160503, 2340866, 2491642, 2693438, 3287222, 4210633, Flurandrenolide film formulationIssued on: 07/01/1980 Inventor: Takruri , et al.4291014, Polymeric diffusion matrix containing estradiol diacetate Issued on: 09/22/1981 Inventor: Keith , et al.4321252Polymeric diffusion matrix containing ester derivatives of estradiol Issued on: 03/23/1982 Inventor: Keith , et al. International ClassesA61K 9/00 (20060101)A61K 31/135 (20060101) A61K 9/70 (20060101) A61K 31/415 (20060101) A61K 31/565 (20060101) |
