US4950486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosage form for treating cardiovascular diseases
Assignee: Alza Corp
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Filing: 1988-11-07
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Granted: 1990-08-21
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Expires: 2008-11-07
Abstract
Abstract An osmotic device is disclosed comprising a first composition, and a second composition with the beneficial drug isradipine in the first composition.
Inventors
- 👤 Atul D. Ayer
- 👤 David R. Swanson
- 👤 Anthony L. Kuczynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:30
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0002; A61K9/0004; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A composition for use in an osmotic device, said composition comprising about 2 weight percent to 30 weight percent of isradipine, a polyethylene oxide comprising a molecular weight of about 200,000 to about 300,000 and a hydroxypropylemthylecellulose comprising a number average molecular weight of about 9,000 to 15,000.
Claim 2
Dependent Claim
48 words
A composition for use in an osmotic device, said composition comprising about 2 weight percent to 30 weight percent of isradipine, a polyethylene oxide comprising a molecular weight of about 200,000 to about 300,000 and a hydroxypropylemthylecellulose comprising a number average molecular weight of about 9,000 to 15,000.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |