US2902358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of counteracting too high temperature attack on the furnace lining when melting and refining molten metal by means of oxygen containing gases in a rotary furnace
Assignee: Stora Enso Oyj
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Filing: 1958-01-27
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Granted: 1959-09-01
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Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 Kalling Bo Michael Sture
- 👤 Johansson Folke Karl Evald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/44; F; F27; F27B; F27B7/00; F27B7/20; F27B7/2083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF PROTECTING THE LIMING OF A ROTARY FURNACE WHEN TREATING A MELT OF A METAL THEREIN BY MEANS OF A GAS RICH IN OXYGEN BLOWN FROM ABOVE INTO CONTACT WITH THE SURFACE OF SAID MELT WHICH COMPRISES INTRODUCING A STREAM OF COOLING AGENT SEPARATELY FROM SAID GAS RICH IN OXYGEN INTO SAID FURNACE IN SUCH A WAY AS SUBSTANTIALLY TO CUT OFF THE RADIATION OF HEAT FROM THE REGION OF THE SURFACE OF SAID MELT WHERE SAID GAS RICH IN OXYGEN COMES INTO REACTIVE CONTACT WITH SAID MELT TO THE FURNACE WALL ABOVE SAID MELT, SAID COOLING AGENT BEING A GRANULAR SOLID SUSPENDED IN AND CARRIED BY A GAS AND BEING INJECTED INTO SAID FURNACE SO AS TO IMPINGE AGAINST SAID FURNACE WALL.
Claim 2
Independent Claim
125 words
A METHOD OF PROTECTING THE LIMING OF A ROTARY FURNACE WHEN TREATING A MELT OF A METAL THEREIN BY MEANS OF A GAS RICH IN OXYGEN BLOWN FROM ABOVE INTO CONTACT WITH THE SURFACE OF SAID MELT WHICH COMPRISES INTRODUCING A STREAM OF COOLING AGENT SEPARATELY FROM SAID GAS RICH IN OXYGEN INTO SAID FURNACE IN SUCH A WAY AS SUBSTANTIALLY TO CUT OFF THE RADIATION OF HEAT FROM THE REGION OF THE SURFACE OF SAID MELT WHERE SAID GAS RICH IN OXYGEN COMES INTO REACTIVE CONTACT WITH SAID MELT TO THE FURNACE WALL ABOVE SAID MELT, SAID COOLING AGENT BEING A GRANULAR SOLID SUSPENDED IN AND CARRIED BY A GAS AND BEING INJECTED INTO SAID FURNACE SO AS TO IMPINGE AGAINST SAID FURNACE WALL.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |