Patent US3000874A successfully refreshed from Google Patents.
US3000874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfate salt of erythromycin monoester
Assignee: Eli Lilly and Co
•
Filing: 1959-04-08
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Granted: 1961-09-19
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Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Malcolm D Bray
- 👤 Verlin C Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:42
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A SULFATE SALT OF A LOWER ALIPHATIC CARBOXYLIC ACID MONOESTER OF THE GROUP CONSISTING OF ERYTHROMYCIN AND ERYTHROMYCIN B, SAID SULFATE SALT BEING AN ALIPHATIC HYDROCARBONSULFATE SALT IN WHICH THE ALIPHATIC GROUP HAS FROM 8 TO 31 CARBON ATOMS.
Claim 2
Dependent Claim
39 words
A SULFATE SALT OF A LOWER ALIPHATIC CARBOXYLIC ACID MONOESTER OF THE GROUP CONSISTING OF ERYTHROMYCIN AND ERYTHROMYCIN B, SAID SULFATE SALT BEING AN ALIPHATIC HYDROCARBONSULFATE SALT IN WHICH THE ALIPHATIC GROUP HAS FROM 8 TO 31 CARBON ATOMS.
References Cited (Backward Citations)
US2537934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |