US2761859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous soluble salts of erythromycin
Assignee: Abbott Laboratories
•
Filing: 1953-01-14
•
Granted: 1956-09-04
•
Expires: 1973-01-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Hoffhine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS OF PREPARING NEW AND USEFUL PHARMACEUTICAL SUBSTANCES WHICH COMPRISES MIXING SOLUTIONS OF APPROXIMATELY EQUIMOLAR PROPORTIONS OF ERYTHROMYCIN AND LACTOBIONIC ACID AT ORDINARY TEMPERATURES, AND SEPARATING THE RESULTING WATER SOLUBLE WHITE AMORPHOUS SOLID ERYTHROMYCIN LACTOBIONATE, FROM THE REACTION MEDIUM.
Claim 2
Dependent Claim
40 words
THE PROCESS OF PREPARING NEW AND USEFUL PHARMACEUTICAL SUBSTANCES WHICH COMPRISES MIXING SOLUTIONS OF APPROXIMATELY EQUIMOLAR PROPORTIONS OF ERYTHROMYCIN AND LACTOBIONIC ACID AT ORDINARY TEMPERATURES, AND SEPARATING THE RESULTING WATER SOLUBLE WHITE AMORPHOUS SOLID ERYTHROMYCIN LACTOBIONATE, FROM THE REACTION MEDIUM.
References Cited (Backward Citations)
US1989566A
Cited
US2653899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |