US2954388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of triethylaluminum
Assignee: Millennium Petrochemicals Inc
•
Filing: 1957-01-18
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Granted: 1960-09-27
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 John F Nobis
- 👤 Charles E Frank
- 👤 William F Mcfadyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:50
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PREPARATION OF TRIETHYLALUMINUM WHICH COMPRISES REACTING ETHYLALUMINUM CHLORIDE WITH FINELYDIVIDED, HIGH SURFACE SODIUM IN AN AMOUNT IN EXCESS, BUT NOT SUBSTANTIALLY MORE THAN ABOUT A 15% EXCESS, OF THE AMOUNT OF SODIUM THEORETICALLY REQUIRED TO CONVERT SAID CHLORIDE TO A TRIETHYLALUMINUM, AT A TEMPERATURE ABOVE THE MELTING POINT OF SODIUM BUT BELOW ABOUT 200* C.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PREPARATION OF TRIETHYLALUMINUM WHICH COMPRISES REACTING ETHYLALUMINUM CHLORIDE WITH FINELYDIVIDED, HIGH SURFACE SODIUM IN AN AMOUNT IN EXCESS, BUT NOT SUBSTANTIALLY MORE THAN ABOUT A 15% EXCESS, OF THE AMOUNT OF SODIUM THEORETICALLY REQUIRED TO CONVERT SAID CHLORIDE TO A TRIETHYLALUMINUM, AT A TEMPERATURE ABOVE THE MELTING POINT OF SODIUM BUT BELOW ABOUT 200* C.
References Cited (Backward Citations)
BE535085A
Cited
US2838556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |