US2915542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dimethylaluminum hydride
Assignee: Millennium Petrochemicals Inc
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Filing: 1958-02-04
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Granted: 1959-12-01
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Robert E Robinson
- 👤 Ervin G Pritchett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:40
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD FOR PREPARATION OF DIMETHYLALUMINUM HYDRIDE WHICH COMPRISES REACTING A DIMETHYLALUMINUM HALIDE FROM THE GROUP CONSISTING OF DIMETHYLALUMINUM CHLORIDE AND DIMETHYLALUMINUM BROMIDE WITH AN ALKALI METAL HYDRIDE DISPERSED IN AN INERT LIQUID, WHICH DISPERSION HAS BEEN PREPARED BY HYDROGENATION OF AN ALKALI METAL IN AN INERT LIQUID IN PRESENCE OF FROM ABOUT TWO TO ABOUT FIVE PERCENT BY WEIGHT, BASED ON TH ALKALI METAL OF METHYL BORATE.
Claim 2
Independent Claim
68 words
A METHOD FOR PREPARATION OF DIMETHYLALUMINUM HYDRIDE WHICH COMPRISES REACTING A DIMETHYLALUMINUM HALIDE FROM THE GROUP CONSISTING OF DIMETHYLALUMINUM CHLORIDE AND DIMETHYLALUMINUM BROMIDE WITH AN ALKALI METAL HYDRIDE DISPERSED IN AN INERT LIQUID, WHICH DISPERSION HAS BEEN PREPARED BY HYDROGENATION OF AN ALKALI METAL IN AN INERT LIQUID IN PRESENCE OF FROM ABOUT TWO TO ABOUT FIVE PERCENT BY WEIGHT, BASED ON TH ALKALI METAL OF METHYL BORATE.
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |