US2688645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction
Assignee: ExxonMobil Oil Corp
•
Filing: 1952-09-10
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Granted: 1954-09-07
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Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Darwin E Badertscher
- 👤 Alfred W Francis
- 👤 George C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:17
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/10; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE PROCESS FOR RESOLVING A HYDROCARBON MIXTURE CONTAINING AROMATIC AND NON-AROMATIC HYDROCARBONS INTO FRACTIONS OF DIFFERENT DEGREES OF AROMATICITY, WHICH COMPRISES: CONTACTING THE MIXTURE WITH A SOLVENT COMPRISING A CYCLIC ORGANIC CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALLENE CARBONATE AND CARBONATES REPRESENTED BY ONE OF THE GENERAL FORMULAE:
Claim 2
Dependent Claim
49 words
THE PROCESS FOR RESOLVING A HYDROCARBON MIXTURE CONTAINING AROMATIC AND NON-AROMATIC HYDROCARBONS INTO FRACTIONS OF DIFFERENT DEGREES OF AROMATICITY, WHICH COMPRISES: CONTACTING THE MIXTURE WITH A SOLVENT COMPRISING A CYCLIC ORGANIC CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALLENE CARBONATE AND CARBONATES REPRESENTED BY ONE OF THE GENERAL FORMULAE:
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |