Patent US3276859A successfully refreshed from Google Patents.
US3276859A
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US
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Process for the reduction of metals from oxide
Assignee: Elektrokemisk AS
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Filing: 1963-07-05
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Granted: 1966-10-04
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Collin Fredrik Christen
- 👤 Basen Toralv
- 👤 Skretting Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:54
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C22; C22B; C22B4/00; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN THE ELECTRIC SMELTING OF IRON OXIDES THE STEPS OF FORMING MOLDED AGGREGATES OF THE OXIDE IN POWDERED FORM WITH LESS THAN THE STOICHIOMETRIC AMOUNT OF POWDERED CARBONACEOUS MATERIAL REQUIRED TO REDUCE SUCH OXIDE, PEHEATING SUCH AGGREGATES IN THE SUBSTANTIAL ABSENCE OF FREE OXYGEN TO A TEMPERATURE BETWEEN 500*C. AND 900*C. AND INTRODUCING SUCH AGGREGATES WITH ADDITIONAL QUANTITIES OF LUMPY CARBONACEOUS MATERIAL INTO AN ELETRIC SMELTING FURNACE, THE AMOUNT OF SUCH LUMPY CARBONACEOUS MATERIAL BEING EQUAL TO BETWEEN 10% AND 75% OF THE TOTAL CARBONACEOUS MATERIAL NECESSARY FOR REDUCING THE OXIDES.
Claim 2
Dependent Claim
91 words
IN THE ELECTRIC SMELTING OF IRON OXIDES THE STEPS OF FORMING MOLDED AGGREGATES OF THE OXIDE IN POWDERED FORM WITH LESS THAN THE STOICHIOMETRIC AMOUNT OF POWDERED CARBONACEOUS MATERIAL REQUIRED TO REDUCE SUCH OXIDE, PEHEATING SUCH AGGREGATES IN THE SUBSTANTIAL ABSENCE OF FREE OXYGEN TO A TEMPERATURE BETWEEN 500*C. AND 900*C. AND INTRODUCING SUCH AGGREGATES WITH ADDITIONAL QUANTITIES OF LUMPY CARBONACEOUS MATERIAL INTO AN ELETRIC SMELTING FURNACE, THE AMOUNT OF SUCH LUMPY CARBONACEOUS MATERIAL BEING EQUAL TO BETWEEN 10% AND 75% OF THE TOTAL CARBONACEOUS MATERIAL NECESSARY FOR REDUCING THE OXIDES.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |