Polymeric diffusion matrix containing phenylephrine
Patent 4294820 Issued on October 13, 1981. Estimated Expiration Date: 
July 9, 2000. 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 9, 2000. 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 ReferencesInventorsAssigneeApplicationNo. 06/167101 filed on 07/09/1980US Classes:514/653, Hydroxy, bonded directly to carbon, attached directly or indirectly to the acyclic carbon or chain by acyclic nonionic bonding (e.g., beta hydroxy phenethylamines, etc.)424/486, Synthetic polymer604/500MethodExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmInternational ClassesA61K 31/135 (20060101)A61K 9/70 (20060101) A61K 31/415 (20060101) A61K 31/565 (20060101) Foreign Application Priority Data1979-08-14 JPAbstractThere is disclosed a polymeric diffusion matrix for the sustained release of phenylephrine by transdermal delivery to a patient wherein the matrix comprises a polar plasticizer, polyvinylalcohol, polyvinylpyrrolidone, and a pharmaceutically effective amount of phenylephrine. | |
