Patent US2915380A successfully refreshed from Google Patents.
US2915380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining molten pig iron
Assignee: Union Carbide Corp
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Filing: 1956-02-08
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Granted: 1959-12-01
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Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Donald C Hilty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:19
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; Y; Y10; Y10S; Y10S75/00; Y10S75/958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN THE MANUFACTURE OF STEEL BY THE INDIRECT PROCESS WHICH COMPRISES SMELTING IRON ORE MATERIAL TO PRODUCE PIG IRON AND CONVERTING SUCH PIG IRON TO STEEL BY REMOVING SILICON AND CARBON THEREFROM IN A REFINING FURNACE, THE IMPROVEMENT WHICH COMPRISES EFFECTING A PARTIAL REFINEMENT OF SUCH PIG IRON PRIOR TO CHARGING IT TO SAID REFINING FURNACE, SAID PARTIAL REFINEMENT BEING ATTAINED BY DISPERSING A QUANTITY OF MOLTEN PIG IRON INTO DISCRETE DROPLETS, THEREBY INCREASING ITS SURFACE-TO-MASS RATIO; CAUSING SAID DROPLETS TO FALL FREELY AND IN A SUBSTANTIALLY VERTICAL PATH IN A TOWER; INTRODUCING INTO SAID TOWER A PLURALITY OF OPPOSED, IMPINGING STREAMS OF OXIDIZING GAS, THE IMPINGEMENT OF SUCH STREAMS RESULTING IN A STREAM OF SUCH GAS GENERALLY SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID TOWER AND TO THE PATH OF FALL OF SAID DROPLETS WHEREBY SAID OXIDIZING GAS IS BROUGHT INTO INTIMATE, REAC-
Claim 2
Dependent Claim
145 words
IN THE MANUFACTURE OF STEEL BY THE INDIRECT PROCESS WHICH COMPRISES SMELTING IRON ORE MATERIAL TO PRODUCE PIG IRON AND CONVERTING SUCH PIG IRON TO STEEL BY REMOVING SILICON AND CARBON THEREFROM IN A REFINING FURNACE, THE IMPROVEMENT WHICH COMPRISES EFFECTING A PARTIAL REFINEMENT OF SUCH PIG IRON PRIOR TO CHARGING IT TO SAID REFINING FURNACE, SAID PARTIAL REFINEMENT BEING ATTAINED BY DISPERSING A QUANTITY OF MOLTEN PIG IRON INTO DISCRETE DROPLETS, THEREBY INCREASING ITS SURFACE-TO-MASS RATIO; CAUSING SAID DROPLETS TO FALL FREELY AND IN A SUBSTANTIALLY VERTICAL PATH IN A TOWER; INTRODUCING INTO SAID TOWER A PLURALITY OF OPPOSED, IMPINGING STREAMS OF OXIDIZING GAS, THE IMPINGEMENT OF SUCH STREAMS RESULTING IN A STREAM OF SUCH GAS GENERALLY SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID TOWER AND TO THE PATH OF FALL OF SAID DROPLETS WHEREBY SAID OXIDIZING GAS IS BROUGHT INTO INTIMATE, REAC-
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |