US2900402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aluminum alkyls
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-03-17
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Granted: 1959-08-18
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 William K Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE PREPARATION OF ALUMINUM ALKYLS BY REACTION OF FINELY DIVIDED ALUMINUM WITH A MONO-OLEFIN CONTAINING THE GROUP: CH2=C<, AND HYDROGEN, THE STEP OF CONTACTING AT AN ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE HYDROGEN WITH A MIXTURE OF ALUMINUM IN FINELY DIVIDED FORM AND SAID OLEFIN, WHICH MIXTURE ALUMINUM IS PRESENT IN EXCESS OVER THAT REACTED.
Claim 2
Dependent Claim
55 words
IN THE PREPARATION OF ALUMINUM ALKYLS BY REACTION OF FINELY DIVIDED ALUMINUM WITH A MONO-OLEFIN CONTAINING THE GROUP: CH2=C<, AND HYDROGEN, THE STEP OF CONTACTING AT AN ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE HYDROGEN WITH A MIXTURE OF ALUMINUM IN FINELY DIVIDED FORM AND SAID OLEFIN, WHICH MIXTURE ALUMINUM IS PRESENT IN EXCESS OVER THAT REACTED.
References Cited (Backward Citations)
DE917006C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |