US2566548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of metal from oxide ores
Assignee: FR DES CHARBONNAGES DU TONKIN
•
Filing: 1947-07-23
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Granted: 1951-09-04
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Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Beauchesne Paul
- 👤 Deville Rene Sainte-Claire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/08; C21B13/085; C22; C22B; C22B5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS OF EXTRACTION FOR METALLIC OXIDE ORES COMPRISING DEPOSITING A MIXTURE OF METALLIC OXIDE ORE, REDUCER COAL AND FLUX IN A THIN LAYER ON THE WALLS OF AN OVEN HAVING AN INNER SURFACE WHICH IS A SURFACE OF REVOLUTION, THE PROPORTIONS OF THE INGREDIENTS OF SAID MIXTURE BEING PREDETERMFINED ACCORDING TO THE DESIRED DEGREE OF CARBONIZATION OF THE METALLIC OXIDE ORE, ROTATING THE OVEN AT A RATE OF THE ORDER OF 100 REVOLUTIONS PER MINUTE WHEREBY CENTRIFUGAL FORCE WILL EFFECT AN ADHERENCE OF SAID LAYER TO SAID WALLS, AND HEATING SAID LAYER DURING ROTATION BY A FLAME FED FROM OUTSIDE THE FURNACE AND APPLIED TO SAID LAYER.
Claim 2
Dependent Claim
108 words
A PROCESS OF EXTRACTION FOR METALLIC OXIDE ORES COMPRISING DEPOSITING A MIXTURE OF METALLIC OXIDE ORE, REDUCER COAL AND FLUX IN A THIN LAYER ON THE WALLS OF AN OVEN HAVING AN INNER SURFACE WHICH IS A SURFACE OF REVOLUTION, THE PROPORTIONS OF THE INGREDIENTS OF SAID MIXTURE BEING PREDETERMFINED ACCORDING TO THE DESIRED DEGREE OF CARBONIZATION OF THE METALLIC OXIDE ORE, ROTATING THE OVEN AT A RATE OF THE ORDER OF 100 REVOLUTIONS PER MINUTE WHEREBY CENTRIFUGAL FORCE WILL EFFECT AN ADHERENCE OF SAID LAYER TO SAID WALLS, AND HEATING SAID LAYER DURING ROTATION BY A FLAME FED FROM OUTSIDE THE FURNACE AND APPLIED TO SAID LAYER.
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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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |