US3287006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous steel making furnace
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1963-04-08
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Granted: 1966-11-22
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Kai Tsuyoshi
- 👤 Shibata Tatsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:48
CPC Classifications
F; F27; F27B; F27B3/00; C; C21; C21C; C21C5/00; C21C5/56; C21C5/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A CONTINUOUS STEEL MAKING FURNACE COMPRISING A CHARGED RAW MATERIAL HEATING ZONE HAVING A CHARGING OPENING OPENING INTO IT AND HAVING TWO COMBUSTION GAS SUCTION PORTS THEREIN NEAR SAID CHARGING OPENING, A MELTING ZONE CONNECTED TO SAID HEATING ZONE AND HAVING AN UPPER PORTION HAVING AN OXYGEN BURNER, A COMBUSTION BURNER AND A PREHEATED AIR PORT THEREIN, A FUSING ZONE CONNECTED TO SAID MELTING ZONE AND A REFINING ZONE HAVING A MOLTEN PIG IRON CHARGING PORT, AN AUXILIARY RAW MATERIAL CHARGING PORT, AN OPERATION CHARGING OPENING AND A SLAG REMOVAL OPENING THEREIN, SAID FUSION ZONE AND REFINING ZONE EACH HAVING AT LEAST ONE BURNER IN AN UPPER PORTION THEREOF, A SLIGHT PROJECTION BETWEEN SAID FUSION ZONE AND REFINING ZONE FOR PARTITIONING SAID ZONES FROM EACH OTHER, A FINISHING ZONE CONNECTED TO SAID REFINING ZONE AND HAVING AN OPERATION OPENING, A TAPPING HOLE AND A MOLTEN STEEL TEMPERATURE ADJUSTING BURNER THEREIN, A PARTITION WALL BETWEEN SAID REFINING ZONE AND SAID FINISHING ZONE HAVING A MOLTEN STEEL PASSING HOLE IN THE LOWER PART THEREOF, THE BOTTOM SURFACES OF SAID ZONES BEING SLOPED DOWNWARDLY FROM SAID CHARGING OPENING TO SAID TAPPING HOLE.
Claim 2
Dependent Claim
189 words
A CONTINUOUS STEEL MAKING FURNACE COMPRISING A CHARGED RAW MATERIAL HEATING ZONE HAVING A CHARGING OPENING OPENING INTO IT AND HAVING TWO COMBUSTION GAS SUCTION PORTS THEREIN NEAR SAID CHARGING OPENING, A MELTING ZONE CONNECTED TO SAID HEATING ZONE AND HAVING AN UPPER PORTION HAVING AN OXYGEN BURNER, A COMBUSTION BURNER AND A PREHEATED AIR PORT THEREIN, A FUSING ZONE CONNECTED TO SAID MELTING ZONE AND A REFINING ZONE HAVING A MOLTEN PIG IRON CHARGING PORT, AN AUXILIARY RAW MATERIAL CHARGING PORT, AN OPERATION CHARGING OPENING AND A SLAG REMOVAL OPENING THEREIN, SAID FUSION ZONE AND REFINING ZONE EACH HAVING AT LEAST ONE BURNER IN AN UPPER PORTION THEREOF, A SLIGHT PROJECTION BETWEEN SAID FUSION ZONE AND REFINING ZONE FOR PARTITIONING SAID ZONES FROM EACH OTHER, A FINISHING ZONE CONNECTED TO SAID REFINING ZONE AND HAVING AN OPERATION OPENING, A TAPPING HOLE AND A MOLTEN STEEL TEMPERATURE ADJUSTING BURNER THEREIN, A PARTITION WALL BETWEEN SAID REFINING ZONE AND SAID FINISHING ZONE HAVING A MOLTEN STEEL PASSING HOLE IN THE LOWER PART THEREOF, THE BOTTOM SURFACES OF SAID ZONES BEING SLOPED DOWNWARDLY FROM SAID CHARGING OPENING TO SAID TAPPING HOLE.
References Cited (Backward Citations)
US2034071A
Cited
US3171877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |