Patent US7476830B2 successfully refreshed from Google Patents.
Patent US2862811A successfully refreshed from Google Patents.
US2862811A
Expired / Lapsed
US
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Continuous iron and steel making in a rotary vessel
Assignee: Stora Enso Oyj
•
Filing: 1955-09-12
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Granted: 1958-12-02
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Eketorp Sven Gustav Harald
- 👤 Backstrom Sven Hjalmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:59
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/567; Y; Y10; Y10S; Y10S75/00; Y10S75/957
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OR REFINING MOLTEN IRON WHICH COMPRISES SUPPLYING IRON MATERIAL AND SLAG FORMING MATERIAL TO AN ANNULAR BODY THEREOF IN A VESSEL WHICH IS ROTATING ON A VERTICAL AXIS, SAID VESSEL HAVING A CHARGING OPENING AT ITS UPPER END AND A TAPPING HOLE AT ITS LOWER END, AND WITHDRQWING REFINED IRON AND SLAG FROM SAID BODY THROUGH SAID TAPPING HOLE AT A RATE SUCH AS TO MAINTAIN SAID BODY, AND REFINING SAID IRON MATERIAL BY CONTINUOUSLY INTRODUCING OXYGEN INTO THE SPACE SURROUNDED BY SAID ANNULAR BODY.
Claim 2
Independent Claim
87 words
A METHOD OR REFINING MOLTEN IRON WHICH COMPRISES SUPPLYING IRON MATERIAL AND SLAG FORMING MATERIAL TO AN ANNULAR BODY THEREOF IN A VESSEL WHICH IS ROTATING ON A VERTICAL AXIS, SAID VESSEL HAVING A CHARGING OPENING AT ITS UPPER END AND A TAPPING HOLE AT ITS LOWER END, AND WITHDRQWING REFINED IRON AND SLAG FROM SAID BODY THROUGH SAID TAPPING HOLE AT A RATE SUCH AS TO MAINTAIN SAID BODY, AND REFINING SAID IRON MATERIAL BY CONTINUOUSLY INTRODUCING OXYGEN INTO THE SPACE SURROUNDED BY SAID ANNULAR BODY.
References Cited (Backward Citations)
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Cited
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US1484465A
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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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |