Patent US3561925A successfully refreshed from Google Patents.
US3561925A
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US
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Production of ammonia and sulfur from ammonium sulfites or sulfides
Assignee: IFP Energies nouvelles
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Filing: 1968-06-20
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Granted: 1971-02-09
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Expires: 1988-06-20
Abstract
Abstract A PROCESS FOR MANUFACTURING AMMONIA AND SULFUR WHICH COMPRISES REACTING AMMONIUM SULFITE OR AMMONIUM SULFIDE WITH, RESPECTIVELY, A GAS CONTAINING HYDROGEN SULFIDE OR SULFUR DIOXIDE, AT A TEMPERATURE OF ABOUT 90 TO 180* C. IN THE PRESENCE OF A LIQUID PHASE CONTAINING AT LEAST 10% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HIGHER ALCOHOLS, POLYOLS, MONO- AND POLYALKYLENE GLYCOLS, ESTERS AND ETHERS OF THE ALCOHOLS, POLYOLS AND GLYCOLS AND PHOSPHORIC ESTERS, AND RECOVERING SULFUR THEREFROM AS WELL AS WATER AND AMMONIA IN THE GASEOUS STATE.
Inventors
- 👤 Andre Deschamps
- 👤 Philippe Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:14
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/026; C01C1/028; C01B; C01B17/00; C01B17/02; C01B17/06
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |