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|Title:||Pharmaceutical delivery system|
|Abstract:||A composition for use in an aqueous environment which .[.comprise.]. .Iadd.comprises .Iaddend.a formulation containing a water-soluble pharmaceutically beneficial agent, a water-insoluble, water-permeable film coating surrounding the formulation, and particulate, water-soluble, pore-forming material dispersed within the film coating. The questions raised in reexamination request No. 90/001,344, filed Oct. 5, 1987, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).|
|Inventor(s):||Baker; Richard W. (Palo Alto, CA), Brooke; James W. (Sisters, OR)|
|Assignee:||Burroughs Wellcome Co. (Research Triangle Park, NC)|
Patent Claim Types:|
see list of patent claims
|Composition; Dosage form;|
|Foriegn Application Priority Data|
|Foreign Country||Foreign Patent Number||Foreign Patent Date|
|United Kingdom||8322007||Aug 16, 1983|
|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
|European Patent Office||0467488||► subscribe||2000C/021||Belgium||► subscribe|
|European Patent Office||0467488||► subscribe||SPC/GB00/019||United Kingdom||► subscribe|
| This preview shows a limited data set|
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.
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