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Patent US3723068A successfully refreshed from Google Patents.
US3723068A
Expired / Lapsed
US
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Apparatus for the preparation of sulfur dioxide
Assignee: Babcock International Ltd
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Filing: 1970-12-14
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Granted: 1973-03-27
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Expires: 1990-12-14
Abstract
Abstract A SYSTEM FOR PREPARING SULFUR DIOXIDE GAS WHEREBY SULFUR IS BURNED WITHIN A CYCLONE FURNACE SUPPLIED WITH A CLOSELY CONTROLLED AMOUNT OF EXCESS AIR TO MINIMIZE SULFUR TRIOXIDE FORMATION. THE FURNACE IS CONSTRUCTED TO ASSURE SUBSTANTIALLY COMPLETE CONVERSION OF THE SULFUR TO SULFUR DIOXIDE, WITH NO LIQUID SULFUR DROPLETS ENTRAINED IN THE PRODUCT GASES. THE COMBUSTION PRODUCT GASES FROM THE FURNACE CAN BE SUBSEQUENTLY PASSED DIRECTLY TO AND THROUGH A WATER SPRAY TOWER FOR COOLING AND TO REMOVE ANY SULFUR TRIOXIDE PRESENT.
Inventors
- 👤 Ilroy R Mc
- 👤 W Sage
- 👤 H Markant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |