US3536698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplified method for esterification of antibiotics via carbonate anhydride intermediates
Assignee: Eli Lilly and Co
•
Filing: 1968-02-27
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Granted: 1970-10-27
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Expires: 1988-02-27
Abstract
No abstract record available.
Inventors
- 👤 Robert R Chauvette
- 👤 Edwin H Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:04
CPC Classifications
C; C07; C07D; C07D499/00; C07C; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1491655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |