Patent US2790834A successfully refreshed from Google Patents.
US2790834A
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Separation of phenols from hydrocarbons
Assignee: Midland Tar Distillers Ltd
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Filing: 1953-07-07
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Granted: 1957-04-30
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Expires: 1973-07-07
Abstract
No abstract record available.
Inventors
- 👤 Morton Frank
- 👤 Cumming Alfred Paton Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:05
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/72; C07C37/685; C07C37/74; C07C37/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR SEPARATING AT LEAST ONE PHENOLIC COMPOUND OF THE PHENOLS GROUP FROM A MIXTURE THEREOF WITH AT LEAST ONE HYDROCARBON WHICH COMPRISES SUBJECTING SUCH MIXTURE TO SOLVENT EXTRACTION WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND TRI-ETHYLENE GLYCOL TO OBTAIN AN EXTRACT RICH IN THE PHENOLIC COMPOUND, DISTILLING THE EXTRACT TO SEPARATE THE SOLVENT FROM THE EXTRACT, SUBJECTING THE EX-
Claim 2
Dependent Claim
69 words
A PROCESS FOR SEPARATING AT LEAST ONE PHENOLIC COMPOUND OF THE PHENOLS GROUP FROM A MIXTURE THEREOF WITH AT LEAST ONE HYDROCARBON WHICH COMPRISES SUBJECTING SUCH MIXTURE TO SOLVENT EXTRACTION WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND TRI-ETHYLENE GLYCOL TO OBTAIN AN EXTRACT RICH IN THE PHENOLIC COMPOUND, DISTILLING THE EXTRACT TO SEPARATE THE SOLVENT FROM THE EXTRACT, SUBJECTING THE EX-
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |