US2756986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roasting sulfide ores
Assignee: GEA Group AG
•
Filing: 1952-11-10
•
Granted: 1956-07-31
•
Expires: 1972-11-10
Abstract
No abstract record available.
Inventors
- 👤 Schytil Franz
- 👤 Ley Hellmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:19
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
AN APPARATUS FOR ROASTING SULFIDIC-ORES DEVELOPING TEMPERATURES DURING THE HEAT OF REACTION WHICH WOULD CAUSE SINTERING COMPRISING A FURNACE HAVING DOWNWARDLY CONVERGING ELONGATED SIDE WALLS, END WALLS, AND A BOTTOM EXTENDING BETWEEN SAID WALLS, MEANS FOR INTRODUCING ORE INTO SAID FURNACE THROUGH THE UPER PORTION OF ONE END WALL, MEANS FOR INTRODUCING GAS INTO SAID FURNACE THROUGH
Claim 2
Independent Claim
57 words
AN APPARATUS FOR ROASTING SULFIDIC-ORES DEVELOPING TEMPERATURES DURING THE HEAT OF REACTION WHICH WOULD CAUSE SINTERING COMPRISING A FURNACE HAVING DOWNWARDLY CONVERGING ELONGATED SIDE WALLS, END WALLS, AND A BOTTOM EXTENDING BETWEEN SAID WALLS, MEANS FOR INTRODUCING ORE INTO SAID FURNACE THROUGH THE UPER PORTION OF ONE END WALL, MEANS FOR INTRODUCING GAS INTO SAID FURNACE THROUGH
References Cited (Backward Citations)
BE494961A
Cited
US2042576A
Cited
US2371619A
Cited
US2404944A
Cited
US2637629A
Cited
GB645977A
Cited
US2665899A
Cited
GB668119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |