US3749762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing sulfur from sour gas
Assignee: BP America Production Co
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Filing: 1971-08-02
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Granted: 1973-07-31
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Expires: 1991-08-02
Abstract
Abstract THIS INVENTION PROVIDES A PROCESS FOR RECOVERING SULFUR FROM SOUR GASES TAKING ADVANTAGE OF THE INCREASED RECOVERY OBTAINED BY THE USE OF LOW TEMPERATURE REACTORS IN A THREE-REACTOR PLANT THE FEED STREAM IS ALTERNATELY FED IN CLOCK WISE SEQUENCE TO EACH OF THE THREE REACTORS UNDER LOW TEMPERATURE CONDITIONS. THE CYCLE OF OPERATION FOR EACH REACTOR FOLLOWS THE SEQUENCE; CLAUS REACTION, COOLING, CLEANUP AND REGENERATION. BY THIS PROCEDURE, RECOVERIES IN EXCESS OF 99 PERCENT ARE POSSIBLE.
Inventors
- 👤 N Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:53
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0426; C01B17/0439
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |