US2582197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction process
Assignee: California Research LLC
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Filing: 1948-06-25
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Granted: 1952-01-08
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Expires: 1968-06-25
Abstract
No abstract record available.
Inventors
- 👤 Clark J Egan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:45
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF SEPARATING A PETROLEUM DISTILLATE BOILING IN THE BOILING RANGE OF GASOLINE AND KEROSENE AND CONTAINING PARAFFINIC, OLEFINIC, NAPHTHENIC AND AROMATIC HYDROCARBONS WHICH COMPRISES FIRST EXTRACTING THE DISTILLATE WITH A PERFLUOROCARBON CONTAINING 3 TO 12 CARBON ATOMS TO SEPARATE AN EXTRACT COMPRISING PARAFFINS AND OLEFINS, AND EXTRACTING THE RAFFINATE OF THE FIRST EXTRACTION WITH A PERFLUOROCARBON CONTAINING 3 TO 12 CARBON ATOMS TO SEPARATE AN EXTRACT COMPRISING NAPHTHENIC HYDROCARBONS.
Claim 2
Independent Claim
71 words
THE METHOD OF SEPARATING A PETROLEUM DISTILLATE BOILING IN THE BOILING RANGE OF GASOLINE AND KEROSENE AND CONTAINING PARAFFINIC, OLEFINIC, NAPHTHENIC AND AROMATIC HYDROCARBONS WHICH COMPRISES FIRST EXTRACTING THE DISTILLATE WITH A PERFLUOROCARBON CONTAINING 3 TO 12 CARBON ATOMS TO SEPARATE AN EXTRACT COMPRISING PARAFFINS AND OLEFINS, AND EXTRACTING THE RAFFINATE OF THE FIRST EXTRACTION WITH A PERFLUOROCARBON CONTAINING 3 TO 12 CARBON ATOMS TO SEPARATE AN EXTRACT COMPRISING NAPHTHENIC HYDROCARBONS.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |