US4000263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erythromycin solution
Assignee: Westwood Pharmaceuticals Inc
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Filing: 1975-05-02
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Granted: 1976-12-28
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Expires: 1995-05-02
Abstract
Abstract There is disclosed a storage stable solution comprising a solution of erythromycin, propylene glycol, ethyl alcohol, and an ethoxylated ether of lauryl alcohol. The solution possesses excellent stability at both room temperature and at elevated temperatures for prolonged periods of time.
Inventors
- 👤 Peter Hebborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/39; A61K8/60; A61K8/602; A61K9/00; A61K9/0012; A61K9/0014; A61Q; A61Q19/00; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
An erythromycin solution which possesses good storage stability comprising a solution of erythromycin, propylene glycol, ethyl alcohol, and an ethoxylated ether of lauryl alcohol.
Claim 2
Dependent Claim
24 words
An erythromycin solution which possesses good storage stability comprising a solution of erythromycin, propylene glycol, ethyl alcohol, and an ethoxylated ether of lauryl alcohol.
Claim 3
Dependent Claim
53 words
A composition as defined in claim 1 comprising from about 0.5 to 3.0% by weight of erythromycin, from about 35 to 45% by weight of propylene glycol, from about 4 to 10% by weight of ethoxylated ether of lauryl alcohol, and an amount of ethyl alcohol sufficient to make up 100% of solution.
Claim 4
Dependent Claim
64 words
A composition as defined in claim 1 comprising 2% by weight of 100% active erythromycin, 40% by weight of propylene glycol, 6% by weight of ethoxylated ether of lauryl alcohol having the formula CH 3 (CH 2 ) 10 CH 2 -(OCH 2 CH 2 )nOH wherein n has an average value of 4, the remainder of the solution consisting of specially denatured alcohol.
References Cited (Backward Citations)
US3780737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |