US2819160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing the metalloid content of iron
Assignee: BOC Group Ltd
•
Filing: 1956-05-28
•
Granted: 1958-01-07
•
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 09:59
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.
References Cited (Backward Citations)
US99677A
Cited
US645205A
Cited
US790397A
Cited
US859572A
Cited
FR444809A
Cited
US1549313A
Cited
US1937064A
Cited
US2609288A
Cited
US2577764A
Cited
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 |