US4751071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising salbutamol
Assignee: Alza Corp
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Filing: 1987-01-07
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Granted: 1988-06-14
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Expires: 2007-01-07
Abstract
Abstract An osmotic delivery system is disclosed for delivering a useful agent at a controlled and constant rate modulated by a pulsed delivery of the useful agent to an environment of use.
Inventors
- 👤 Paul R. Magruder
- 👤 Brian Barclay
- 👤 Patrick S. L. Wong
- 👤 Felix Theeuwes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:51
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0002; A61K9/0004; A61M; A61M31/00; A61M31/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A composition for use in an osmotic device comprising: a beneficial agent comprising salbutamol, a modulating agent comprising sodium chloride which sodium chloride is present in an amount relative to the salbutamol less than the amount needed for the sodium chloride to maintain saturation in a fluid that enters the osmotic device, and wherein the composition when in said osmotic device is useful for dispensing salbutamol at a substantially zero order rate of delivery accompanied by a pulsed rate of delivery.
Claim 2
Dependent Claim
81 words
A composition for use in an osmotic device comprising: a beneficial agent comprising salbutamol, a modulating agent comprising sodium chloride which sodium chloride is present in an amount relative to the salbutamol less than the amount needed for the sodium chloride to maintain saturation in a fluid that enters the osmotic device, and wherein the composition when in said osmotic device is useful for dispensing salbutamol at a substantially zero order rate of delivery accompanied by a pulsed rate of delivery.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |