US2772153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roasting pyrites
Assignee: Texas Gulf Sulphur Co
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Filing: 1955-08-04
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Granted: 1956-11-27
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 James R West
- 👤 Gormley Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THAT METHOD OF ROASTING PYRITES TO PRODUCE SULFUR AND FERRIC OXIDE COMPRISING FLUIDIZING ONE PORTION OF PYRITES WITH NITROGEN-CONTAINING GAS SUBSTANTIALLY FREE FROM OXYGEN AT A TEMPERATURE TO DRIVE OFF THE LABILE SULFUR ATOM AND FORM PYRRHOTITE, SEPARATELY FLUIDIZING A SECOND PORTION OF PYRITES IN THE SAME MANNER, RECOVERING THE SULFUR FROM SAID TREATMENTS, FLUIDIZING THE PYRRHOTITE FROM SAID ONE PORTION WITH AN OXYGEN-CONTAINING GAS AT A TEMPERATURE TO CONVERT IT TO MAGNETITE AND PRODUCE SULFUR DIOXIDE, FLUIDIZING THE PYRRHOTITE FROM SAID SECOND PORTION WITH SULFUR DIOXIDE, INCLUDING THAT FROM SAID ONE PORTION, AT A TEMPERATURE TO CONVERT THE PYRRHOTITE TO MAGNETITE WITH PRODUCTION OF A MIXTURE OF SULFUR DIOXIDE
Claim 2
Dependent Claim
110 words
THAT METHOD OF ROASTING PYRITES TO PRODUCE SULFUR AND FERRIC OXIDE COMPRISING FLUIDIZING ONE PORTION OF PYRITES WITH NITROGEN-CONTAINING GAS SUBSTANTIALLY FREE FROM OXYGEN AT A TEMPERATURE TO DRIVE OFF THE LABILE SULFUR ATOM AND FORM PYRRHOTITE, SEPARATELY FLUIDIZING A SECOND PORTION OF PYRITES IN THE SAME MANNER, RECOVERING THE SULFUR FROM SAID TREATMENTS, FLUIDIZING THE PYRRHOTITE FROM SAID ONE PORTION WITH AN OXYGEN-CONTAINING GAS AT A TEMPERATURE TO CONVERT IT TO MAGNETITE AND PRODUCE SULFUR DIOXIDE, FLUIDIZING THE PYRRHOTITE FROM SAID SECOND PORTION WITH SULFUR DIOXIDE, INCLUDING THAT FROM SAID ONE PORTION, AT A TEMPERATURE TO CONVERT THE PYRRHOTITE TO MAGNETITE WITH PRODUCTION OF A MIXTURE OF SULFUR DIOXIDE
References Cited (Backward Citations)
US1941592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |