US2608467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfur dioxide
Assignee: Standard Oil Development Co
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Filing: 1948-12-22
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Granted: 1952-08-26
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Expires: 1968-12-22
Abstract
No abstract record available.
Inventors
- 👤 Warren K Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR THE CONTINUOUS PRODUCTION OF SULFUR DIOXIDE SUBSTANTIALLY FREE OF SULFUR, OXYGEN, AND SULFURE TRIOXIDE, WHICH COMPRISES CONTINUOUSLY BURNING SULFUR IN A COMBUSTION ZONE WITH AN OXYGEN-CONTAINING GAS, WHEREBY A GASEOUS MIXTURE OF SULFUR DIOXIDE CONTAINING AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF SULFUR, OXYGEN, AND SULFUR TRIOXIDE IS PRODUCTED, PASSING THE IMPURE GASEOUS SULFUR DIOXIDE INTO A PURIFICATION ZONE CONTAINING FINELYDIVIDED IRON OXIDE AT LEAST 10 PER CENT BY WEIGHT OF WHICH IS IN A STATE OF OXIDATION OF FE2O3, AND AT LEAST 10 PER CENT BY WEIGHT OF WHICH IS IN A STATE OF OXIDATION OF FE3O4, MAINTAINING A TEMPERATURE OF 700* C. TO 1000* C. IN THE PURIFICATION ZONE, CONTROLLING THE AMOUNT OF AN OXYGEN-CONTAINING GAS FED TO THE COMBUSTION ZONE TO MAINTAIN THE IRON OXIDE IN THE PURIFICATION ZONE IN SAID REQUIRED STATE OF OXIDATION AND RECOVERING FROM THE PURIFICATION ZONE GASEOUS SULFUR DIOXIDE SUBSTANTIALLY FREE OF SULFUR, OXYGEN, AND SULFUR TRIOXIDE.
Claim 2
Dependent Claim
161 words
A PROCESS FOR THE CONTINUOUS PRODUCTION OF SULFUR DIOXIDE SUBSTANTIALLY FREE OF SULFUR, OXYGEN, AND SULFURE TRIOXIDE, WHICH COMPRISES CONTINUOUSLY BURNING SULFUR IN A COMBUSTION ZONE WITH AN OXYGEN-CONTAINING GAS, WHEREBY A GASEOUS MIXTURE OF SULFUR DIOXIDE CONTAINING AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF SULFUR, OXYGEN, AND SULFUR TRIOXIDE IS PRODUCTED, PASSING THE IMPURE GASEOUS SULFUR DIOXIDE INTO A PURIFICATION ZONE CONTAINING FINELYDIVIDED IRON OXIDE AT LEAST 10 PER CENT BY WEIGHT OF WHICH IS IN A STATE OF OXIDATION OF FE2O3, AND AT LEAST 10 PER CENT BY WEIGHT OF WHICH IS IN A STATE OF OXIDATION OF FE3O4, MAINTAINING A TEMPERATURE OF 700* C. TO 1000* C. IN THE PURIFICATION ZONE, CONTROLLING THE AMOUNT OF AN OXYGEN-CONTAINING GAS FED TO THE COMBUSTION ZONE TO MAINTAIN THE IRON OXIDE IN THE PURIFICATION ZONE IN SAID REQUIRED STATE OF OXIDATION AND RECOVERING FROM THE PURIFICATION ZONE GASEOUS SULFUR DIOXIDE SUBSTANTIALLY FREE OF SULFUR, OXYGEN, AND SULFUR TRIOXIDE.
References Cited (Backward Citations)
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US1412452A
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Cited
US2245697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |