US3230072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aluminum by electro-thermal reduction
Assignee: Individual
•
Filing: 1962-05-04
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Granted: 1966-01-18
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Expires: 1982-05-04
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:58
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE PROCESS OF PRODUCING ALUMINUM BY ELECTROTHERMAL REDUCTION OF ALUMINUM OXIDE WHICH COMPRISES ELECTRICALLY HEATING A MIXTURE OF ALUMINUM OXIDE AND SOLID CARBON TO A TEMPERATURE ABOVE THE FUSION TEMPERATURE OF THE REACTED ALUMINUM OXIDE AND CARBON AND REDUCING ALUMINUM IN VAPOR FORM AND FORMING CARBON MONOXIDE, PROVIDING OVER THE FUSION AND IN CONTACT THEREWITH A LIQUID BODY OF ALUMINUM, PASSING THE VAPORS OF ALUMINUM AND CARBON MONOXIDE RELEASED IN THE REDUCTION UPWARD THROUGH THE BODY OF ALUMINUM, PROVIDING ABOVE THE BODY OF ALUMINUM A CONFINED ZONE OF CARBON MONOXIDE WHICH PROTECTS THE BODY OF ALUMINUM, COOLING THE ALUMINUM VAPOR TO THE LIQUID STATE AND THE CARBON MONOXIDE TO PREVENT INTERACTION THEREOF, AND REMOVING LIQUID ALUMINUM FROM THE BODY AND CARBON MONOXIDE FROM THE ZONE.
Claim 2
Dependent Claim
125 words
THE PROCESS OF PRODUCING ALUMINUM BY ELECTROTHERMAL REDUCTION OF ALUMINUM OXIDE WHICH COMPRISES ELECTRICALLY HEATING A MIXTURE OF ALUMINUM OXIDE AND SOLID CARBON TO A TEMPERATURE ABOVE THE FUSION TEMPERATURE OF THE REACTED ALUMINUM OXIDE AND CARBON AND REDUCING ALUMINUM IN VAPOR FORM AND FORMING CARBON MONOXIDE, PROVIDING OVER THE FUSION AND IN CONTACT THEREWITH A LIQUID BODY OF ALUMINUM, PASSING THE VAPORS OF ALUMINUM AND CARBON MONOXIDE RELEASED IN THE REDUCTION UPWARD THROUGH THE BODY OF ALUMINUM, PROVIDING ABOVE THE BODY OF ALUMINUM A CONFINED ZONE OF CARBON MONOXIDE WHICH PROTECTS THE BODY OF ALUMINUM, COOLING THE ALUMINUM VAPOR TO THE LIQUID STATE AND THE CARBON MONOXIDE TO PREVENT INTERACTION THEREOF, AND REMOVING LIQUID ALUMINUM FROM THE BODY AND CARBON MONOXIDE FROM THE ZONE.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |