US2550985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing diborane
Assignee: Metal Hydrides Inc
•
Filing: 1949-08-18
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Granted: 1951-05-01
•
Expires: 1969-08-18
Abstract
No abstract record available.
Inventors
- 👤 Albert E Finholt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:38
CPC Classifications
C; C01; C01B; C01B6/00; C01B6/06; C01B6/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD WHICH COMPRISES SUBJECTING A BORON HALIDE TO THE ACTION OF A COMPLEX HYDRIDE OF CALCIUM AND ALUMINUM IN A SOLVENT MEDIUM CONSISTING ESSENTIALLY OF DIOXANE, THE TEMPERATURE OF THE REACTION MEDIUM BEING BETWEEN ABOUT ROOM TEMPERATURE AND THE REFLUXING TEMPERATURE OF THE LIQUID PRESENT, AND REMOVING AND RECOVERING GASEOUS DIBORANE.
Claim 2
Independent Claim
52 words
THE METHOD WHICH COMPRISES SUBJECTING A BORON HALIDE TO THE ACTION OF A COMPLEX HYDRIDE OF CALCIUM AND ALUMINUM IN A SOLVENT MEDIUM CONSISTING ESSENTIALLY OF DIOXANE, THE TEMPERATURE OF THE REACTION MEDIUM BEING BETWEEN ABOUT ROOM TEMPERATURE AND THE REFLUXING TEMPERATURE OF THE LIQUID PRESENT, AND REMOVING AND RECOVERING GASEOUS DIBORANE.
References Cited (Backward Citations)
US2468260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |