Generated: December 15, 2017
DrugPatentWatch Database Preview
Details for Patent: 5,989,581
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Which drugs does patent 5,989,581 protect, and when does it expire?
Summary for Patent: 5,989,581
|Title:|| Drug delivery system for two or more active substances|
|Abstract:||The present invention is dealing with a drug delivery system, preferably in a ring-shaped form suitable for vaginal administration, for the simultaneous release of a progestogenic steroid compound and an estrogenic steroid compound in a fixed physiological ratio over a prolonged period of time. The drug delivery system comprises at least one compartment comprising a thermoplastic polymer core containing the mixture of the progestogenic and estrogenic compounds and a thermoplastic polymer skin, the progestogenic compound being initially dissolved in the polymer core material in a relatively low degree of supersaturation.|
|Inventor(s):|| Groenewegen; Rudolf Johannes Joseph (Heesch, NL) |
|Assignee:|| Akzo Nobel N.V. (Arnhem, NL) |
Patent Claim Types:|
see list of patent claims
|Compound; Delivery; |
Foreign Priority and PCT Information for Patent: 5,989,581
|Foriegn Application Priority Data|
||Foreign Patent Number
||Foreign Patent Date
|97201098||Apr 11, 1997|
International Patent Family for Patent: 5,989,581
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