US3752877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sulfur compounds from tail gases
Assignee: Parsons Government Services Inc
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Filing: 1971-03-19
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Granted: 1973-08-14
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Expires: 1991-03-19
Abstract
Abstract GAS STREAMS CONTAINING SULFUR, WATER, SULFUR DIOXIDE, CARBONYL SULFIDE, AND CARBON DISULFIDE ARE ENRICHED WITH HYDROGEN AND CATALYTICALLY HYDROGENATED AND HYDROLYZED TO HYDROGEN SULFIDE WHICH IS REMOVE.
Inventors
- 👤 D Beavon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05; C01B17/16; C01B17/164
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |