US3666416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium hydride production
Assignee: Shell USA Inc
•
Filing: 1970-11-25
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Granted: 1972-05-30
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Expires: 1990-11-25
Abstract
Abstract MAGNESIUM HYDRIDE HAVING HIGH-SURFACE AREA AND HIGHCHEMICAL ACTIVITY IS PRODUCED BY HYDROGENATING A MIXTURE OF MAGNESIUM AND A CONJUGATED DIENE IN THE PRESENCE OF TETRAHYDROJURAN.
Inventors
- 👤 Walter K Henle
- 👤 Edgar J Smutny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:00
CPC Classifications
C; C01; C01B; C01B6/00; C01B6/04
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |