US3160496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating ironpyrites
Assignee: Montedison SpA
•
Filing: 1962-03-27
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Granted: 1964-12-08
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Vaccari Italo
- 👤 Morra Angelo
- 👤 Colombo Umberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:54
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; B; B03; B03B; B03B1/00; B03B1/02; B03C; B03C1/00; B03C1/005; B03C1/015; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/52; C21; C21B; C21B13/00; C21B13/006; C21B3/00; C21B3/04; C22B1/14; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P20/00; Y02P20/10; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR OBTAINING SO2, STEAM AND CINDERS OF HIGH IRON CONTENT, WHICH COMPRISES TREATING PYRITE ORE HAVING A SULFUR CONTENT ABOVE 18% BY: (A) CRUSHING THE CRUDE UNSORTED ORE TO LESS THAN 12 MM.; (B) ROASTING THE CRUSHED ORE IN A FLLUIDIZED BED FURNACE THEREBY PRODUCING SULFUR DIOXIDE, HOT HERMATITE CINDERS, AND STREAM; (C) REDUCING THE HEMATITE CINDERS OF STEP (B), WHILE STILL HOT, IN A REDUCTION FURNACE BY MEANS OF A REDUCING GAS CONTAINING HYDROGEN AND CARBON MONOXIDE, TO MAGNETITE CINDERS; (D) COOLING THE MAGNETITE CINDERS PRODUCED IN STEP (C); AND (E) MAGNETICALLY ENRICHING THE MAGNETITE CINDERS
Claim 2
Dependent Claim
99 words
A PROCESS FOR OBTAINING SO2, STEAM AND CINDERS OF HIGH IRON CONTENT, WHICH COMPRISES TREATING PYRITE ORE HAVING A SULFUR CONTENT ABOVE 18% BY: (A) CRUSHING THE CRUDE UNSORTED ORE TO LESS THAN 12 MM.; (B) ROASTING THE CRUSHED ORE IN A FLLUIDIZED BED FURNACE THEREBY PRODUCING SULFUR DIOXIDE, HOT HERMATITE CINDERS, AND STREAM; (C) REDUCING THE HEMATITE CINDERS OF STEP (B), WHILE STILL HOT, IN A REDUCTION FURNACE BY MEANS OF A REDUCING GAS CONTAINING HYDROGEN AND CARBON MONOXIDE, TO MAGNETITE CINDERS; (D) COOLING THE MAGNETITE CINDERS PRODUCED IN STEP (C); AND (E) MAGNETICALLY ENRICHING THE MAGNETITE CINDERS
References Cited (Backward Citations)
GB384464A
Cited
US2292305A
Cited
US2993778A
Cited
US2699388A
Cited
US2943929A
Cited
US3005699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |