US2780307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of elemental sulphur from a gas system
Assignee: PACIFIC FOUNDRY Co Ltd
•
Filing: 1953-05-28
•
Granted: 1957-02-05
•
Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Merrill W Macafee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:28
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/027; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE RECOVERY OF SULPHUR VAPOR FROM A HOT GAS STREAM HAVING A TEMPERATURE IN THE NEIGHBORHOOD OF THE BOILING POINT OF SULPHUR, THE IMPROVEMENT WHICH COMPRISES COOLING THE GAS STREAM TO A TEMPERATURE NOT LOWER THAN ABOUT 540*F. BY INDIRECT HEAT EXCHANGE, SCRUBBING THE COOLED GAS STREAM WITH MOLTEN SULPHUR MOVING CONCURRENTLY TO THE GAS STREAM, THEN SWIRLING THE GAS STREAM TO THROW ENTRAINED SULPHUR OUT OF IT BY CENTRIFUGAL ACTION, AND THEREAFTER REMOVING ADDITIONAL SULPHUR FROM THE STREAM BY PASSING IT THROUGH A POROUS SOLID MEDIUM.
Claim 2
Dependent Claim
88 words
IN THE RECOVERY OF SULPHUR VAPOR FROM A HOT GAS STREAM HAVING A TEMPERATURE IN THE NEIGHBORHOOD OF THE BOILING POINT OF SULPHUR, THE IMPROVEMENT WHICH COMPRISES COOLING THE GAS STREAM TO A TEMPERATURE NOT LOWER THAN ABOUT 540*F. BY INDIRECT HEAT EXCHANGE, SCRUBBING THE COOLED GAS STREAM WITH MOLTEN SULPHUR MOVING CONCURRENTLY TO THE GAS STREAM, THEN SWIRLING THE GAS STREAM TO THROW ENTRAINED SULPHUR OUT OF IT BY CENTRIFUGAL ACTION, AND THEREAFTER REMOVING ADDITIONAL SULPHUR FROM THE STREAM BY PASSING IT THROUGH A POROUS SOLID MEDIUM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |