US3410760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ethers by contact with ammonia and an alkaline metal in a liquid medium
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1966-07-29
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Granted: 1968-11-12
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 Craig Stephen James
- 👤 Souza John Trevor De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:13
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/14841
Claims Analysis
Total Claims: 0
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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) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |