Physically modified beclomethasone dipropionate suitable for use in aerosols
Patent 4810488 Issued on March 7, 1989. Estimated Expiration Date: 
August 18, 2006. 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.
August 18, 2006. 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.InventorAssigneeApplicationNo. 06/902411 filed on 08/18/1986US Classes:424/45, Organic pressurized fluid552/574Carbon bonded directly at the 16-position (e.g., betamethasones, dexamethasones, etc.)ExaminersPrimary: Lee, Mary C.Assistant: Dentz, Bernard Attorney, Agent or FirmInternational ClassC07J 5/00 (20060101)Foreign Application Priority Data1984-12-19 GBAbstractA method for preparing a stable aerosol formulation of beclomethasone dipropionate in which the steroid is contacted with an alcohol containing 1 to 5 carbon atoms to form a crystalline solvate therewith, the crystalline material so formed being reduced to a particle size below 10 microns and thereafter dispersed in a composition comprising chlorofluorocarbon propellents. |
| ||||||||||||||
