US2933448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of aromatic hydrocarbons from non-aromatic hydrocarbons utilizing a lactam-water solvent
Assignee: Ohio Oil Co
•
Filing: 1954-12-06
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Granted: 1960-04-19
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Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 Richard D Morin
- 👤 John B Fishel
- 👤 Arthur E Bearse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:32
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF OBTAINING AN EXTRACT RICH IN AROMATIC HYDROCARBONS FROM A MIXTURE OF AROMATIC AND NONAROMATIC HYDROCARBONS BY MEANS OF PHASE SEPARATION COMPRISING EXTRACTING SAID MIXTURE WITH A SELECTIVE SOLVENT COMPRISING N-METHYL-GAMMA-BUTYROLACTAM AND FROM 5 TO 10 BY WEIGHT OF WATER.
Claim 2
Dependent Claim
42 words
THE PROCESS OF OBTAINING AN EXTRACT RICH IN AROMATIC HYDROCARBONS FROM A MIXTURE OF AROMATIC AND NONAROMATIC HYDROCARBONS BY MEANS OF PHASE SEPARATION COMPRISING EXTRACTING SAID MIXTURE WITH A SELECTIVE SOLVENT COMPRISING N-METHYL-GAMMA-BUTYROLACTAM AND FROM 5 TO 10 BY WEIGHT OF WATER.
References Cited (Backward Citations)
US2092739A
Cited
GB472767A
Cited
US2409059A
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US2568176A
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US2568159A
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FR1056444A
Cited
US2737538A
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US2770663A
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US2771494A
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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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |