US2809885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur purification process
Assignee: Foster Wheeler Inc
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Filing: 1953-12-22
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Granted: 1957-10-15
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Expires: 1973-12-22
Abstract
No abstract record available.
Inventors
- 👤 John G Ditman
- 👤 Frederic T Mertens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A CONTINUOUS PROCESS OF PURIFYING SULFUR CONTAINING HYDROCARBON IMPURITIES WHICH PROCESS COMPRISES FLOWING LIQUID SULFUR CONTAINING SAID IMPURITIES INTO A SEPARATION ZONE, TREATING SAID SULFUR IN THE SEPARATION ZONE BY FLOWING THE SULFUR AT A TEMPERATURE ABOVE 230*F.-240*F. BUT BELOW 312*F.-315*F. AND A CYCLIC HYDROCARBON COMPOUND SOLVENT IN COUNTERCURRENT CONTACT WITH ONE ANOTHER UNDER SUCH PRESSURE THAT THE SOLVENT WILL NOT VAPORIZE, EXTRACTING SAID IMPURITIES FROM THE LIQUID SULFUR BY SAID SOLVENT THEREBY FORMING A HYDROCARBON-SULFUR-SOLVENT
Claim 2
Dependent Claim
76 words
A CONTINUOUS PROCESS OF PURIFYING SULFUR CONTAINING HYDROCARBON IMPURITIES WHICH PROCESS COMPRISES FLOWING LIQUID SULFUR CONTAINING SAID IMPURITIES INTO A SEPARATION ZONE, TREATING SAID SULFUR IN THE SEPARATION ZONE BY FLOWING THE SULFUR AT A TEMPERATURE ABOVE 230*F.-240*F. BUT BELOW 312*F.-315*F. AND A CYCLIC HYDROCARBON COMPOUND SOLVENT IN COUNTERCURRENT CONTACT WITH ONE ANOTHER UNDER SUCH PRESSURE THAT THE SOLVENT WILL NOT VAPORIZE, EXTRACTING SAID IMPURITIES FROM THE LIQUID SULFUR BY SAID SOLVENT THEREBY FORMING A HYDROCARBON-SULFUR-SOLVENT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |