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US3965167A
Expired / Lapsed
US
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Crystalline ammonium N-acetyl-L-cysteinate and mucolytic process
Assignee: Mead Johnson and Co LLC
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Filing: 1972-02-03
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Granted: 1976-06-22
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Expires: 1992-02-03
Abstract
Abstract The ammonium salt of N-acetyl-L-cysteine is a relatively non-hygroscopic crystalline solid which renders it particularly useful for administration by insufflation in the treatment of bronchopulmonary disease. It is of use in a mucolytic process wherein bronchopulmonary mucus is contacted with solid ammonium N-acetyl-L-cysteinate utilizing only the energy of the inspiratory action of the inhaler.
Inventors
- 👤 Eugene Emanuel Hamlow
- 👤 Tellis Alexander Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:27
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/185; A61K31/19; A61K31/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
Crystalline ammonium salt of N-acetyl-L-cysteine.
Claim 2
Dependent Claim
5 words
Crystalline ammonium salt of N-acetyl-L-cysteine.
References Cited (Backward Citations)
US3091569A
Cited
US3647834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |