Patent US2971833A successfully refreshed from Google Patents.
US2971833A
Expired / Lapsed
US
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Process of manufacturing magnesium
Assignee: LA DITE LE MAGNESIUM THERMIQUE Ste
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Filing: 1959-04-07
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Granted: 1961-02-14
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Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Artru Jean
- 👤 Marchal Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:11
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PRODUCING MAGNESIUM BY THE REDUCTION OF A SUBSTANCE COMPRISING MAGNESIA BY A METALLIC REDUCING AGENT, COMPRISING THE STEPS OF: DISSOLVING SAID SUBSTANCE IN A LIQUID SLAG CONSISTING ESSENTIALLY OF LIME, SILICA AND ALUMINA, WHEREIN THE FOLLOWING MOLECULAR RATIOS HOLD TRUE: NUMBER OF MOLECULES CAO NUMBER OF MOLECULES SIO2 IS AT LEAST 1.8. AND NUMBER OF MOLECULES AL2O3 NUMBER OF MOLECULES SIO2 IS AT LEAST 0.26. DISPERSING SAID METALLIC REDUCING AGENT IN SAID LIQUID SLAG AND HEATING SAID SLAG BY ELECTRIC CURRENT FLOWING BETWEEN CARBON ELECTRODES IN CONTACT WITH SAID SLAG AND SAID MAGNESIA, THEREBY PRODUCING AND EVAPORATING MAGNESIUM METAL WHILE AVOIDING THE FORMATION OF CARBON MONOXIDE.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PRODUCING MAGNESIUM BY THE REDUCTION OF A SUBSTANCE COMPRISING MAGNESIA BY A METALLIC REDUCING AGENT, COMPRISING THE STEPS OF: DISSOLVING SAID SUBSTANCE IN A LIQUID SLAG CONSISTING ESSENTIALLY OF LIME, SILICA AND ALUMINA, WHEREIN THE FOLLOWING MOLECULAR RATIOS HOLD TRUE: NUMBER OF MOLECULES CAO NUMBER OF MOLECULES SIO2 IS AT LEAST 1.8. AND NUMBER OF MOLECULES AL2O3 NUMBER OF MOLECULES SIO2 IS AT LEAST 0.26. DISPERSING SAID METALLIC REDUCING AGENT IN SAID LIQUID SLAG AND HEATING SAID SLAG BY ELECTRIC CURRENT FLOWING BETWEEN CARBON ELECTRODES IN CONTACT WITH SAID SLAG AND SAID MAGNESIA, THEREBY PRODUCING AND EVAPORATING MAGNESIUM METAL WHILE AVOIDING THE FORMATION OF CARBON MONOXIDE.
References Cited (Backward Citations)
GB727038A
Cited
US2847295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |