Patent US3579302A successfully refreshed from Google Patents.
US3579302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming sulfur from so2-containing gases
Assignee: Ortech Corp
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Filing: 1969-06-25
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Granted: 1971-05-18
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Expires: 1989-06-25
Abstract
Abstract HYDROGEN SULPHIDE-CONTAINING GASES USED TO REAC WITH SULPHUR DIOXIDE IN A WASTE EFFUENT GAS STREAM TO THEREBY PRODUCE SULPHUR IS GENERATED BY REACTION BETWEEN SULPHUR, A HYDROCARBON FUEL AND STEAM AT HIGH TEMPERATURES. THE HIGH TEMPERATURES NECESSARY FOR THE REACTION OF SULPHUR, HYDROCARBON FUEL WHICH MAY BE THE SAME AS OR DIFFERENT FROM THAT USED TO FORM THE HYDROGEN SULPHIDE-CONTAINING GASES. THE SULPHUR USED TO FORM THE HYDROGEN SULPHIDE MAY BE THAT FORMED IN THE REACTION OF THE SULPHUR DIOXIDE AND THE HYDROGEN SULPHIDE-CONTAINING GASES.
Inventors
- 👤 Verner B Sefton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0413
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |