US3434824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of aluminum oxide by elemental silicon
Assignee: Reynolds Metals Co
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Filing: 1966-09-16
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Granted: 1969-03-25
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Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas Joseph Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
METHOD FOR THE REDUCTION OF AN OXIDE OF ALUMINUM TO METALLIC ALUMINUM WHICH COMPRISES PROVIDING A REACTION MIXTURE CONSISTING ESSENTIALLY OF ELEMENTAL SILICON AND ALUMINOUS ORE PROVIDING SAID OXIDE, HEATING SAID REACTION MIXTURE AT A TEMPERATURE ABOVE ABOUT 1850*C. TO FORM ALUMINUM AND SILICON MONOXIDE, AND RECOVERING THE ALUMINUM.
Claim 2
Dependent Claim
49 words
METHOD FOR THE REDUCTION OF AN OXIDE OF ALUMINUM TO METALLIC ALUMINUM WHICH COMPRISES PROVIDING A REACTION MIXTURE CONSISTING ESSENTIALLY OF ELEMENTAL SILICON AND ALUMINOUS ORE PROVIDING SAID OXIDE, HEATING SAID REACTION MIXTURE AT A TEMPERATURE ABOVE ABOUT 1850*C. TO FORM ALUMINUM AND SILICON MONOXIDE, AND RECOVERING THE ALUMINUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |