US3681323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6,9-oxygen bridged erythromycin derivatives
Assignee: Abbott Laboratories
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Filing: 1970-09-24
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Granted: 1972-08-01
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Expires: 1990-09-24
Abstract
Abstract 8,9-ANHYDROERYTHROMYCIN B 6,9-HEMIKETAL AND 9-DIHYDROERTHROMYCIN A AND B 6,9-EPOXIDES ARE USEFUL AS ANTIMICROBIAL AGENTS.
Inventors
- 👤 Paul Kurath
- 👤 Richard Stephen Egan
- 👤 Peter Hadley Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:56
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |