Patent US2935470A successfully refreshed from Google Patents.
US2935470A
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US
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Extraction process for recovery of aromatic hydrocarbons utilizing pyridine-bf3 or picoline-bf3 as the solvent
Assignee: Standard Oil Co
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Filing: 1955-03-11
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Granted: 1960-05-03
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Expires: 1975-03-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Nevitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:30
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C10G21/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE SELECTIVE EXTRACTION OF AN AROMATIC HYDROCARBON FROM A NAPHTHA FRACTION CONTAINING THE SAME, WHICH PROCESS COMPRISES CONTACTING SAID NAPHTHA IN THE LIQUID CONDITION WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF PYRIDINE-BORON TRIFLURORIDE AND A PICOLINEBORON TRIFLUORIDE, THE MOLAR RATIO OF PYRIDINE AND PICOLINE, RESPECTIVELY, TO BORON TRIFUORIDE BEING ONE, SAID SOLVENT BEING USED IN AN AMOUNT SUFFICIENT AT LEAST TO FORM A DISTINCT LIQUID PHASE, SEPARATING A RAFFINATE PHASE FROM AN EXTRACT PHASE COMPRISING SAID SOLVENT AND SAID AROMATIC HYDROCARBON, AND DISTILLING SAID AROMATIC HYDROCARBON FROM SAID EXTRACT PHASE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE SELECTIVE EXTRACTION OF AN AROMATIC HYDROCARBON FROM A NAPHTHA FRACTION CONTAINING THE SAME, WHICH PROCESS COMPRISES CONTACTING SAID NAPHTHA IN THE LIQUID CONDITION WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF PYRIDINE-BORON TRIFLURORIDE AND A PICOLINEBORON TRIFLUORIDE, THE MOLAR RATIO OF PYRIDINE AND PICOLINE, RESPECTIVELY, TO BORON TRIFUORIDE BEING ONE, SAID SOLVENT BEING USED IN AN AMOUNT SUFFICIENT AT LEAST TO FORM A DISTINCT LIQUID PHASE, SEPARATING A RAFFINATE PHASE FROM AN EXTRACT PHASE COMPRISING SAID SOLVENT AND SAID AROMATIC HYDROCARBON, AND DISTILLING SAID AROMATIC HYDROCARBON FROM SAID EXTRACT PHASE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |