Patent US3235607A successfully refreshed from Google Patents.
US3235607A
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Process for obtaining pure phenols from impure aqueous solutions
Assignee: —
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Filing: —
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Granted: 1966-02-15
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Expires: 1983-02-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/685; C07C37/70; C07C37/72; C07C37/74; C07C39/00; C07C39/02; C07C39/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR RECOVERING PURE PHENOLS FROM THEIR AQUEOUS NEUTRAL TO ALKALINE SOLUTIONS COMPRISING THE STEPS OF EXTRACTING THE PHENOLS WITH A SOLVENT COMPRISING AT LEAST 20% BY VOLUME OF BRANCHED CHAIN HIGHER ALIPHATIC ALCOHOLS HAVING FROM 13 TO 20 CARBON ATOMS PER MOLECULE AND BOILING ABOVE 245*C. IN AN AMOUNT FROM 0.3 TO 2 TIMES THAT OF THE AQUEOUS FEED SOLUTION, THE SOLVENT HAVING A COMPOSITION CORRSEPONDING TO THAT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROGENED PRI-
Claim 2
Dependent Claim
81 words
A PROCESS FOR RECOVERING PURE PHENOLS FROM THEIR AQUEOUS NEUTRAL TO ALKALINE SOLUTIONS COMPRISING THE STEPS OF EXTRACTING THE PHENOLS WITH A SOLVENT COMPRISING AT LEAST 20% BY VOLUME OF BRANCHED CHAIN HIGHER ALIPHATIC ALCOHOLS HAVING FROM 13 TO 20 CARBON ATOMS PER MOLECULE AND BOILING ABOVE 245*C. IN AN AMOUNT FROM 0.3 TO 2 TIMES THAT OF THE AQUEOUS FEED SOLUTION, THE SOLVENT HAVING A COMPOSITION CORRSEPONDING TO THAT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROGENED PRI-
References Cited (Backward Citations)
US1986320A
Cited
US2683752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |