US3042503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of sulfur
Assignee: Freeport Minerals Co
•
Filing: 1958-10-09
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Granted: 1962-07-03
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Expires: 1978-10-09
Abstract
No abstract record available.
Inventors
- 👤 William N Tuiler
- 👤 Frank L Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:40
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PURIFYING CRUDE MINED SULFUR CONTAINING NOT MORE THAN ABOUT 2% OF CARBONACEOUS IMPURITIES WHICH COMPRISES, MELTING SAID SULFUR, THEREAFTER CONTINUOUSLY FLOWING THE MELTED SULFUR AT A VISCOSITY BELOW 95 SAYBOLT SECONDS THROUGH AN EXTRACTION ZONE, CONTINUOUSLY FLOWING A HOT LIQUID SOLVENT FOR SAID IMPURITIES SELECTED FROM THE GROUP CONSISTING OF CYCLOALIPHATIC HYDROCARBON COMPOUNDS, AROMATIC HYDROCARBON COMPOUNDS AND HALOGENATED ALIPHATIC HYDROCARBON COMPOUNDS IN COUNTERCURRENT CONTACT WITH SAID FLOWING SULFUR, THEREBY TAKING UP THE IMPURITIES IN THE SOLVENT, COLLECTING THE THUS PURIFIED MOLTEN SULFUR FROM ONE END OF THE EXTRACTION ZONE AND COLLECTING THE SOLVENT CONTAINING THE IMPURITIES DISSOLVED THEREIN FROM THE OTHER END OF SAID EXTRACTION ZONE.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PURIFYING CRUDE MINED SULFUR CONTAINING NOT MORE THAN ABOUT 2% OF CARBONACEOUS IMPURITIES WHICH COMPRISES, MELTING SAID SULFUR, THEREAFTER CONTINUOUSLY FLOWING THE MELTED SULFUR AT A VISCOSITY BELOW 95 SAYBOLT SECONDS THROUGH AN EXTRACTION ZONE, CONTINUOUSLY FLOWING A HOT LIQUID SOLVENT FOR SAID IMPURITIES SELECTED FROM THE GROUP CONSISTING OF CYCLOALIPHATIC HYDROCARBON COMPOUNDS, AROMATIC HYDROCARBON COMPOUNDS AND HALOGENATED ALIPHATIC HYDROCARBON COMPOUNDS IN COUNTERCURRENT CONTACT WITH SAID FLOWING SULFUR, THEREBY TAKING UP THE IMPURITIES IN THE SOLVENT, COLLECTING THE THUS PURIFIED MOLTEN SULFUR FROM ONE END OF THE EXTRACTION ZONE AND COLLECTING THE SOLVENT CONTAINING THE IMPURITIES DISSOLVED THEREIN FROM THE OTHER END OF SAID EXTRACTION ZONE.
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) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |