US2990331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable solutions of salts of tetracyclines for parenteral administration
Assignee: Pfizer Inc
•
Filing: 1957-11-15
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Granted: 1961-06-27
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Expires: 1977-11-15
Abstract
No abstract record available.
Inventors
- 👤 Neumann Horst
- 👤 Viehmann Paul
- 👤 Hafer Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:54
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/65
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A STABLE AQUEOUS SOLUTION OF A SALT OF A TETRACYCLINE COMPOUND CONSISTING OF WATER, A SALT OF A TETRACYCLINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXYTETRACYCLINE AND TETRACYCLINE, MAGNESIUM IONS, A BISULFITE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BISULFITES AND CALCIUM AND MAGNESIUM BISULFITES, A PHYSIOLOGICALLY COMPATIBLE CARBOXYLIC ACID AMIDE AND A WATER-SOLUBLE, PHYSIOLOGICALLY COMPATIBLE BASE IN AN AMOUNT SUFFICIENT TO ADJUST THE PH OF THE SOLUTION TO A VALUE BETWEEN 5.0 AND 7.0.
References Cited (Backward Citations)
US2089212A
Cited
US2736725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |