Patent US2663670A successfully refreshed from Google Patents.
US2663670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction
Assignee: ExxonMobil Oil Corp
•
Filing: 1951-12-04
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Granted: 1953-12-22
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Expires: 1971-12-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Francis
- 👤 George C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:05
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE PROCESS OF RESOLVING A HYDROCARBON MIXTURE CONTAINING AROMATIC AND NON-ARMATIC HYDROCARBONS INTO FRACTIONS OF DIFFERENT DEGREES OF AROMATICITY, WHICH COMPRISES: CONTACTING THE MIXTURE WITH A SOLVENT (A) COMPRISING A FLUOROCARBON REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
36 words
THE PROCESS OF RESOLVING A HYDROCARBON MIXTURE CONTAINING AROMATIC AND NON-ARMATIC HYDROCARBONS INTO FRACTIONS OF DIFFERENT DEGREES OF AROMATICITY, WHICH COMPRISES: CONTACTING THE MIXTURE WITH A SOLVENT (A) COMPRISING A FLUOROCARBON REPRESENTED BY THE GENERAL 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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |