US3681053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of high-silicon as the reductant for the metallothermic production of magnesium
Assignee: JULIAN M AVERY
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Filing: 1970-04-06
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Granted: 1972-08-01
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Expires: 1990-04-06
Abstract
Abstract HIGH-SILICON IS USED AS THE REDUCTANT FOR THE PRODUCTION OF MAGNESIUM FROM MAGNESIUM OXIDE AT ELEVATED TEMPERATURE IN THE PRESENCE OF MOLTEN OXIDIC SLAG. SILICON METAL OR A SILICON ALLOY, CONTAINING AT LEAST 80 PERCENT SILICON AND NO MORE THAN 20 PERCENT ALUMINUM AND A MINOR AMOUNT OF IRON OR OTHER NON-REACTIVE COMPONENTS, IS USED AS THE HIGH-SILICON REDUCING AGENT. IN ORDER TO PERMIT OPERATION AT OR NEAR ATMOSPHERIC PRESSURE AND TO DECREASE THE SLICON CONTENT OF THE MAGNESIUM PRODUCT, PREFERABLY INERT GAS IS PROVIDED IN THE VAPOR SPACE OF THE REACTION-CONDENSATION ZONE.
Inventors
- 👤 Julian M Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:00
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |