Patent US2819160A successfully refreshed from Google Patents.
US2819160A
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Process for reducing the metalloid content of iron
Assignee: BOC Group Ltd
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Filing: 1956-05-28
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Granted: 1958-01-07
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Bannister Leonard Charles
- 👤 Chater William John Badenoch
- 👤 Charles James Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:21
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR REDUCING THE METALLOID CONTENT OF IRON WHICH COMPRISES PASSING THE MOLTEN IRON DOWNWARDLY THROUGH A TOWER PACKED WITH PREDOMINANTLY NON-REDUCING MATERIAL PREHEATED TO A TEMPERATURE SUCH THAT THE MOLTEN IRON DOES NOT FREEZE DURING ITS PASSAGE THROUGH THE TOWER, IN COUNTER-CURRENT FLOW TO A STREAM OF A GAS SELECTED FROM THE GROUP CONSISTING OF PURE OXYGEN AND OXYGEN-CONTAINING GAS MIXTURES, IN SUCH MANNER THAT AN OXIDISING ZONE IS PRODUCED AND MAINTAINED AT THE BOTTOM OF THE TOWER AND A REDUCING ZONE AT THE TOP OF THE TOWER.
Claim 2
Dependent Claim
90 words
A PROCESS FOR REDUCING THE METALLOID CONTENT OF IRON WHICH COMPRISES PASSING THE MOLTEN IRON DOWNWARDLY THROUGH A TOWER PACKED WITH PREDOMINANTLY NON-REDUCING MATERIAL PREHEATED TO A TEMPERATURE SUCH THAT THE MOLTEN IRON DOES NOT FREEZE DURING ITS PASSAGE THROUGH THE TOWER, IN COUNTER-CURRENT FLOW TO A STREAM OF A GAS SELECTED FROM THE GROUP CONSISTING OF PURE OXYGEN AND OXYGEN-CONTAINING GAS MIXTURES, IN SUCH MANNER THAT AN OXIDISING ZONE IS PRODUCED AND MAINTAINED AT THE BOTTOM OF THE TOWER AND A REDUCING ZONE AT THE TOP OF THE TOWER.
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |