US2618666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isolating phenolic compounds
Assignee: Texaco Inc
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Filing: 1951-01-17
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Granted: 1952-11-18
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Expires: 1971-01-17
Abstract
No abstract record available.
Inventors
- 👤 Howard V Hess
- 👤 George B Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:29
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR ISOLATING PHENOLIC COMPOUNDS CONTAINING UP TO 15 SIDE CHAIN CARBON ATOMS FROM PHENOLIC COMPOUND-CONTAINING MIXTURES WHICH COMPRISES CONTACTING SAID MIXTURE WITH A WATERSOLUBLE ALIPHATIC POLYAMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE AMINES, POLYALKYLENE DIAMINES AND MIXTURES THEREOF, WHEREBY THERE ARE FORMED COMPLEXES OF SAID POLYAMINO COMPOUNDS AND SAID PHENOLIC COMPOUNDS, SEPARATING A LIQUID COMPLEX PHASE FROM SAID MIXTURE IN THE PRESENCE OF AN ANTI-SOLVENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINIC AND NAPHTHENIC HYDROCARBONS AND MIXTURES THEREOF, DECOMPOSING SAID SEPARATED COMPLEX PHASE BY CONTACT WITH A SOLVENT, AND RECOVERING SAID PHENOLIC COMPOUNDS FROM SAID DECOMPOSED MIXTURE.
Claim 2
Dependent Claim
101 words
A PROCESS FOR ISOLATING PHENOLIC COMPOUNDS CONTAINING UP TO 15 SIDE CHAIN CARBON ATOMS FROM PHENOLIC COMPOUND-CONTAINING MIXTURES WHICH COMPRISES CONTACTING SAID MIXTURE WITH A WATERSOLUBLE ALIPHATIC POLYAMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE AMINES, POLYALKYLENE DIAMINES AND MIXTURES THEREOF, WHEREBY THERE ARE FORMED COMPLEXES OF SAID POLYAMINO COMPOUNDS AND SAID PHENOLIC COMPOUNDS, SEPARATING A LIQUID COMPLEX PHASE FROM SAID MIXTURE IN THE PRESENCE OF AN ANTI-SOLVENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINIC AND NAPHTHENIC HYDROCARBONS AND MIXTURES THEREOF, DECOMPOSING SAID SEPARATED COMPLEX PHASE BY CONTACT WITH A SOLVENT, AND RECOVERING SAID PHENOLIC COMPOUNDS FROM SAID DECOMPOSED MIXTURE.
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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |