US3755400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of cyclic aluminum compounds
Assignee: Ethyl Corp
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Filing: 1971-12-13
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Granted: 1973-08-28
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Expires: 1991-12-13
Abstract
Abstract NONIONIC ORGANOALUMINUM COMPOUNDS POSSISSING AN ALUMINACYCLOPENTENE MOIETY ARE ARE FORMED BY MIXING (A) ALKALI MATEL 1,1-DIHYDROCARBYLALUMINACYCLOPENT-3-ENIDE WITH (B) ALUMINUM TRIHYDROCARBYL OR DIHYDROCARBYL ALUMINUM HYDRIDE IN PROPORTIONS CORRESPONDING TO AT LEAST ABOUT 1.3 MOLES OF (B) PER MOLE OF (A) IN THE PRESENCE OF A SUITABLE LEWIS BASE.
Inventors
- 👤 L Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:12
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/062
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |