Patent US2803657A successfully refreshed from Google Patents.
US2803657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid stabilized tetracycline salts
Assignee: Wyeth Holdings LLC
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Filing: 1953-11-13
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Granted: 1957-08-20
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Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Ritter Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:37
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A COMPOSITION OF MATTER COMPRISING A DRY, GROUND, SOLID MIXTURE OF AN ACID SALT OF TETRACYCLINE AND FROM ABOUT 1 TO 5 PARTS BY WEIGHT OF A DRY, SOLID, NONTOXIC, INTRAVENOUSLY ACCEPTABLE, WATER-SOLUBLE ACID, THE AMOUNT OF SAID ACID BEING SUFFICIENT TO STABILIZE AND KEEP IN SOLUTION SAID ACID SALT OF TETRACYCLINE WHEN THE COMPOSITION IS DISSOLVED IN WATER AT A CONCENTRATION OF FROM 5 TO 50 MILLIGRAMS PER MILLILITER OF TETRACYCLINE AND TO GIVE SAID SOLUTION A PH BETWEEN 1.5 AND 3.0.
Claim 2
Dependent Claim
83 words
A COMPOSITION OF MATTER COMPRISING A DRY, GROUND, SOLID MIXTURE OF AN ACID SALT OF TETRACYCLINE AND FROM ABOUT 1 TO 5 PARTS BY WEIGHT OF A DRY, SOLID, NONTOXIC, INTRAVENOUSLY ACCEPTABLE, WATER-SOLUBLE ACID, THE AMOUNT OF SAID ACID BEING SUFFICIENT TO STABILIZE AND KEEP IN SOLUTION SAID ACID SALT OF TETRACYCLINE WHEN THE COMPOSITION IS DISSOLVED IN WATER AT A CONCENTRATION OF FROM 5 TO 50 MILLIGRAMS PER MILLILITER OF TETRACYCLINE AND TO GIVE SAID SOLUTION A PH BETWEEN 1.5 AND 3.0.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |