US3920805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceutical devices and method
Assignee: Pharmacia and Upjohn Co
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Filing: 1973-12-17
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Granted: 1975-11-18
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Expires: 1993-12-17
Abstract
Abstract A solid pharmaceutical device formed of a nontoxic resilient polymer and medication releasable therefrom during residence in a living mammal. The device has a nonmedicated core of the polymer encircled by a medicated coating of the polymer. Reduced content of diffusible medication is achieved.
Inventors
- 👤 Theodore J Roseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0036; A61D; A61D7/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2031; A61K9/2036; A61M; A61M31/00; A61M31/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
A SOLID PHARMACEUTICAL DEVICE FORMED AS A VAGINAL RING OF A NONTOXIC RESILIENT MEDICATON DIFFUSING ORGANOPOLYSILOXANE POLYMER AND AN EFFECTIVE VAGINAL DOSAGE AMOUNT OF A MEDICATION DIFFUSIBLE THEREIN WHICH RELEASES SAID MEDICATION DURING RESIDENCE IN THE VAGINAL CAVITY OF A LIVING MAMMAL CONSISTING ESSENTIALLY OF, IN COMBINATION, A NONMEDICATED CENTRAL CORE OF SAID POLYMER AND AN ENCIRCLING FINITE THICKNESS OF A MEDICATED COATING OF SAID POLYMER.
Claim 2
Dependent Claim
66 words
A SOLID PHARMACEUTICAL DEVICE FORMED AS A VAGINAL RING OF A NONTOXIC RESILIENT MEDICATON DIFFUSING ORGANOPOLYSILOXANE POLYMER AND AN EFFECTIVE VAGINAL DOSAGE AMOUNT OF A MEDICATION DIFFUSIBLE THEREIN WHICH RELEASES SAID MEDICATION DURING RESIDENCE IN THE VAGINAL CAVITY OF A LIVING MAMMAL CONSISTING ESSENTIALLY OF, IN COMBINATION, A NONMEDICATED CENTRAL CORE OF SAID POLYMER AND AN ENCIRCLING FINITE THICKNESS OF A MEDICATED COATING OF SAID POLYMER.
Claim 3
Dependent Claim
33 words
The device of claim 1 which is formed of dimethylpolysiloxane with a centered metallic, endless, helical or flat tensioning spring molded in the nonmedicated central core and the diffusible medication is medroxyprogesterone acetate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |