Stable prostaglandin E gels utilizing colloidal silicon dioxide as a gel-forming agent
Patent 4680312 Issued on July 14, 1987. Estimated Expiration Date: 
November 21, 2004. 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.
November 21, 2004. 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 3749800 3816393 3826823 3829579 3927197 Triacetin solutions of PGE-type compounds Triethyl citrate solutions of PGE-type compounds 3-Hydroxy and 3-oxo-prostaglandin analogues Trans-Ɗ2 -pge alkylsulphonyl amides Patent #: 4390548 InventorAssigneeApplicationNo. 06/674357 filed on 11/21/1984US Classes:514/573, Cyclopentyl or cyclopentene (e.g., prostaglandins, etc.)514/944GELExaminersPrimary: Robinson, Douglas W.Attorney, Agent or FirmInternational ClassA61K 31/557 (20060101)Foreign Application Priority Data1982-03-22 GBAbstractThe present invention provides an improved class of stable gels of prostaglandin E compounds prepared from solutions of prostaglandin E compounds in a pharmaceutically acceptable, stabilizing organic solvent, e.g., triacetin, gelled by the addition of colloidal silicon dioxide.Other References
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