Pain management with liposome-encapsulated analgesic drugs
Patent 5451408 Issued on September 19, 1995. Estimated Expiration Date: 
March 23, 2014. 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.
March 23, 2014. 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 ReferencesMethod of encapsulating biologically active materials in multilamellar lipid vesicles (MLV) Multiphase liposomal drug delivery system Liposomal local anesthetic and analgesic products Patent #: 4937078 InventorsAssigneeApplicationNo. 216590 filed on 03/23/1994US Classes:424/450, Liposomes424/1.13, In aerosol, fine spray, effervescent, pressurized fluid, vapor or gas, or complete composition therefor424/1.21, Molecular bilayer structure (e.g., vesicle, liposome)514/817ANESTHETIC, TOPICALExaminersPrimary: Raymond, Richard L.Attorney, Agent or FirmInternational ClassA61K 009/50AbstractLiposome-encapsulated opioid analgesic agents delivered by the pulmonary route provide local, or systemic analgesia superior to that produced by the solution form of these agents administered by parentral (intravenous, intramuscular, or subcutaneous injection) or oral routes.Other References
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