US3340044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace reduction of pelletized ferriferous materials
Assignee: DORNICK VAN
•
Filing: 1964-05-11
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Granted: 1967-09-05
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Edward M Van Dornick
- 👤 Isabel W Macafee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:53
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE PROCESS OF OBTAINING A FERROUS PRODUCT RESULTING FROM REACTION AND REDUCTION OF FERRIFEROUS MATERIALS, THAT INCLUDES MAINTAINING IN AN ELONGATED STATIONARILY WALLED HIGH TEMPERATURE FURNACE ZONE A MOLTEN HORIZONTAL SLAG LAYER AT A TEMPERATURE IN THE RANGE OF ABOUT 3000*F. TO 4000*F., FLOWING THE SLAG LAYER HORIZONTALLY OUT OF SAID ZONE, INTRODUCING TO AND FLOATING WITHIN SAID SLAG LAYER PELLETIZED BODIES TO GROUND FERRIFEROUS SLAG FORMING MATERIAL ADMIXED WITH CARBONACEOUS REDUCING MATERIAL, MAINTAINING SAID BODIES FLOATING IN AND FLOWING WITH THE SLAG LAYER THROUGHOUT A DISTANCE SO EXTENDED AS TO ALLOW FOR REDUCTION OF THE FERRIFEROUS MATERIAL, FUSION AND SUBSTANTIALLY COMPLETE DISINTEGRATION OF THE PELLETS, THEREBY CAUSING MOLTEN IRON PARTICLES TO FORM AND EXUDE OUT OF SAID BODIES INTO THE MOLTEN SLAG WHILE THE BODIES PROGRESSIVELY REDUCE IN SIZE, SETTLING THE IRON PARTICLES FROM AND COALESCING THE IRON PARTICLES BELOW THE SLAG LAYER, AND FLOWING THE COALESCED IRON FROM SAID FURNACE ZONE.
Claim 2
Dependent Claim
153 words
THE PROCESS OF OBTAINING A FERROUS PRODUCT RESULTING FROM REACTION AND REDUCTION OF FERRIFEROUS MATERIALS, THAT INCLUDES MAINTAINING IN AN ELONGATED STATIONARILY WALLED HIGH TEMPERATURE FURNACE ZONE A MOLTEN HORIZONTAL SLAG LAYER AT A TEMPERATURE IN THE RANGE OF ABOUT 3000*F. TO 4000*F., FLOWING THE SLAG LAYER HORIZONTALLY OUT OF SAID ZONE, INTRODUCING TO AND FLOATING WITHIN SAID SLAG LAYER PELLETIZED BODIES TO GROUND FERRIFEROUS SLAG FORMING MATERIAL ADMIXED WITH CARBONACEOUS REDUCING MATERIAL, MAINTAINING SAID BODIES FLOATING IN AND FLOWING WITH THE SLAG LAYER THROUGHOUT A DISTANCE SO EXTENDED AS TO ALLOW FOR REDUCTION OF THE FERRIFEROUS MATERIAL, FUSION AND SUBSTANTIALLY COMPLETE DISINTEGRATION OF THE PELLETS, THEREBY CAUSING MOLTEN IRON PARTICLES TO FORM AND EXUDE OUT OF SAID BODIES INTO THE MOLTEN SLAG WHILE THE BODIES PROGRESSIVELY REDUCE IN SIZE, SETTLING THE IRON PARTICLES FROM AND COALESCING THE IRON PARTICLES BELOW THE SLAG LAYER, AND FLOWING THE COALESCED IRON FROM SAID FURNACE ZONE.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |