Patent US3160792A successfully refreshed from Google Patents.
US2857312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of erythromycin and carbomycin
Assignee: Eli Lilly and Co
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Filing: 1953-09-25
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Granted: 1958-10-21
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Expires: 1973-09-25
Abstract
No abstract record available.
Inventors
- 👤 Verlin C Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; C; C07; C07H; C07H17/00; C07H17/04; C07H17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A HALF-ESTER OF AN ANTIBIOTIC OF THE GROUP CONSISTING OF ERYTHROMYCIN AND CARBOMYCIN WITH A DIBASIC CARBOXYLIC ACID CAPABLE OF FORMING A CYCLIC ANHYDRIDE.
Claim 2
Dependent Claim
24 words
A HALF-ESTER OF AN ANTIBIOTIC OF THE GROUP CONSISTING OF ERYTHROMYCIN AND CARBOMYCIN WITH A DIBASIC CARBOXYLIC ACID CAPABLE OF FORMING A CYCLIC ANHYDRIDE.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |