Patent US3297409A successfully refreshed from Google Patents.
US3297409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur recovery apparatus and method
Assignee: Pan American Petroleum Corp
•
Filing: 1963-08-14
•
Granted: 1967-01-10
•
Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Lorenz V Kunkel
- 👤 George M Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:18
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0413; C01B17/0417
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD FOR RECOVERING FREE SULFUR FROM AN INITIAL HYDROGEN SULFIDE-CONTAINING GAS STREAM OF LOW COMBUSTIBLES CONTNET, WHCH COMPRISES DIVERTING THROUGH A BURNER ABOUT 40% OF SAID STREAM TOGETHER WITH SUFFICIENT OXYGEN TO SUBSTANTIALLY COMPLETELY CONVERT ABOUT 75% OF THE HYDROGEN SULFIDE IN SAID DIVERTED STREAM TO SULFUR DIOXIDE, DISCHARGING THE RESULTING GASEOUS PRODUCTS FROM SAID BURNER INTO A REACTION ZONE, THEREAFTER INTRODUCING THE REMAINDER OF SAID INITIAL STREAM INTO SAID REACTION ZONE VIA A PATH INDEPENDENT OF THAT BY WHICH SAID GASEOUS PRODUCTS ARE DISCHARGED INTO SAID ZONE WHERE SULFUR DIOXIDE AND SAID REMAINDER OF SAID INITIAL STREAM ARE THROUGHLY MIXED AT REACTION TEMPERATURE TO FORM FREE SULFUR IN THE ABSENCE OF A CATALAYST, AND WITHDRAWING VAPORS THUS PRODUCED FROM SAID REACTION ZONE.
Claim 2
Independent Claim
124 words
A METHOD FOR RECOVERING FREE SULFUR FROM AN INITIAL HYDROGEN SULFIDE-CONTAINING GAS STREAM OF LOW COMBUSTIBLES CONTNET, WHCH COMPRISES DIVERTING THROUGH A BURNER ABOUT 40% OF SAID STREAM TOGETHER WITH SUFFICIENT OXYGEN TO SUBSTANTIALLY COMPLETELY CONVERT ABOUT 75% OF THE HYDROGEN SULFIDE IN SAID DIVERTED STREAM TO SULFUR DIOXIDE, DISCHARGING THE RESULTING GASEOUS PRODUCTS FROM SAID BURNER INTO A REACTION ZONE, THEREAFTER INTRODUCING THE REMAINDER OF SAID INITIAL STREAM INTO SAID REACTION ZONE VIA A PATH INDEPENDENT OF THAT BY WHICH SAID GASEOUS PRODUCTS ARE DISCHARGED INTO SAID ZONE WHERE SULFUR DIOXIDE AND SAID REMAINDER OF SAID INITIAL STREAM ARE THROUGHLY MIXED AT REACTION TEMPERATURE TO FORM FREE SULFUR IN THE ABSENCE OF A CATALAYST, AND WITHDRAWING VAPORS THUS PRODUCED FROM SAID REACTION ZONE.
References Cited (Backward Citations)
US1083249A
Cited
US2092386A
Cited
US2836481A
Cited
US2742347A
Cited
US2835559A
Cited
US2834653A
Cited
US2889207A
Cited
US2834655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |