US3679371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization and recovery of elemental sulfur from solvents
Assignee: BRAMEDA RESOURCES Ltd
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Filing: 1969-06-27
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Granted: 1972-07-25
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Expires: 1989-06-27
Abstract
Abstract THE PROCESS FOR THE RECOVERY OF SULFUR OF CONTROLLED CRYSTALLINE SIZE FROM A SOLVENT CONTAINING SULFUR DISSOLVED THEREIN BY A DIRECT HEAT EXCHANGE RELATIONSHIP WITH A LIQUID, WHICH IS IMMISCIBLE WITH SAID SOLVENT. AN IMMISCIBLE LIQUID AT A TEMPERATURE DIFFERENT FROM THAT OF THE SULFUR LADEN SOLVENT IS ADMIXED DIRECTLY THEREWITH, MIXED TO INSURE ADEQUATE HEAT EXCHANGE CONTACT, ALLOWED TO LAYER AND DRAWN OFF FOR RECYCLE. A SLURRY OF CRYSTALLINE SULFUR IN THE PHASE IN WHICH IT IS CONTAINED, IS WITHDRAWN, SEPARATED AND RECOVERED. D R A W I N G
Inventors
- 👤 Lawrence C Tisdel
- 👤 Harry B Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:20
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0205; C01B17/027; C01B17/033; C01B17/10
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |