US2789145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing thiophenols from phenols
Assignee: Consolidation Coal Co
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Filing: 1954-08-10
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Granted: 1957-04-16
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Expires: 1974-08-10
Abstract
No abstract record available.
Inventors
- 👤 Martin B Neuworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:59
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF SEPARATING THIOPHENOLS FROM A MIXTURE OF PHENOLS AND THIOPHENOLS THAT IS SUBSTANTIALLY FREE OF NEUTRAL OILS WHICH COMPRISES THE STEPS OF FEEDING SAID MIXTURE OF PHENOLS TO AN EXTRACTION ZONE, FEEDING TO ONE END OF SAID EXTRACTION ZONE AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 50 TO ABOUT 80 PERCENT BY WEIGHT OF AN OXYGENATION HYDROCARBON HAVING THE FORMULA
Claim 2
Independent Claim
61 words
A METHOD OF SEPARATING THIOPHENOLS FROM A MIXTURE OF PHENOLS AND THIOPHENOLS THAT IS SUBSTANTIALLY FREE OF NEUTRAL OILS WHICH COMPRISES THE STEPS OF FEEDING SAID MIXTURE OF PHENOLS TO AN EXTRACTION ZONE, FEEDING TO ONE END OF SAID EXTRACTION ZONE AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 50 TO ABOUT 80 PERCENT BY WEIGHT OF AN OXYGENATION HYDROCARBON HAVING THE FORMULA
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |