Aerosol formulations containing P134A and/or P227 and particulate medicament
Patent 5916540 Issued on June 29, 1999. Estimated Expiration Date: 
April 6, 2018. 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.
April 6, 2018. 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 2868691 2885427 3014844 3219533 3320125 3809294 3897779 Aerosol propellant compositions Composition for treating asthma Drug-containing chlorofluorocarbon aerosol propellent formulations InventorsAssigneeApplicationNo. 055253 filed on 04/06/1998US Classes:424/45, Organic pressurized fluid424/46, Powder or dust containing514/937DISPERSION OR EMULSIONExaminersPrimary: Bawa, RajAttorney, Agent or FirmForeign Patent References
International ClassA61K 009/12AbstractA pharmaceutical aerosol formulation comprising (i) particulate medicament, (ii) 1,1,1,2-tetrafluoroethane, 1,1,1,2,3,3,3,-heptafluoro-n-propane or a mixture thereof as propellant, and (iii) 0.01 to 5% w/w based upon the propellant of a polar cosolvent, the particulate medicament being present in an amount from 0.005% to 5% w/w relative to the total weight of the formulation and having a particle size of less than 100 microns, and which formulation contains less than 0.0001% w/w surfactant based upon the weight of medicament.Other References
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