Details for Patent: 5,989,581
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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) |
| Application Number: | 09/056,700 |
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Patent Claim Types: see list of patent claims | Compound; Delivery; |
Drugs Protected by US Patent 5,989,581
| Applicant | Tradename | Generic Name | Dosage | NDA | Approval Date | TE | Type | RLD | RS | Patent No. | Patent Expiration | Product | Substance | Delist Req. | Patented / Exclusive Use | Submissiondate |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| >Applicant | >Tradename | >Generic Name | >Dosage | >NDA | >Approval Date | >TE | >Type | >RLD | >RS | >Patent No. | >Patent Expiration | >Product | >Substance | >Delist Req. | >Patented / Exclusive Use | >Submissiondate |
Foreign Priority and PCT Information for Patent: 5,989,581
| Foriegn Application Priority Data | ||
| Foreign Country | Foreign Patent Number | Foreign Patent Date |
| 97201098 | Apr 11, 1997 | |
