Patent US2875149A successfully refreshed from Google Patents.
US2875149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of residual asphaltic oils with light hydrocarbons
Assignee: Texaco Inc
•
Filing: 1955-11-18
•
Granted: 1959-02-24
•
Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 David K Beavon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:08
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS FOR TREATING A RESIDUAL OIL CONTAINING ASPHALTIC CONSTITUENTS WHICH COMPRISES HEATING SAID OIL TO AN ELEVATED TEMPERATURE UNDER VIS-BREAKING CONDITIONS, FRACTIONATING THE RESULTING VIS-BROKEN OIL TO YIELD A FIRST GAS OIL FRACTION AN A FIRST BOTTOMS FRACTION, FRACTIONATING SAID FIRST BOTTOMS FRACTION TO PRODUCE A SECOND GAS OIL FRACTION AND A SECOND BOTTOMS FRACTION, FRACTIONATING SAID FIRST OIL FRACTION TO SEPARATE THEREFROM CONSTITUENTS HAVING A BOILING POINT NOT GREATER THAN ABOUT 500*F. AND TO YIELD A THIRD BOTTOM FRACTION, SUBJECTING SAID SECOND BOTTOMS FRACTION TO LIQUID-LIQUID CONTACT WITH A LIQUID DEASPHALTING SOLVENT UNDER DEASPHALTING CONDITIONS TO SEPARTE ASPHALTIC CONSTITUENTS FROM SAID SECOND BOTTOMS FRACTION AND TO YIELD A DEASPHALTED OIL FRACTION, COMBINING SAID THIRD BOTTOMS FRACTION, SAID SECOND GAS OIL FRACTION AND SAID DEASPHALTED OIL FRACTION, SUBJECTING THE RESULTING COMBINED FRACTIONS TO LIQUIDLIQUID SOLVENT REFINING IN CONTACT WITH A LIQUID SOLVENT WHICH IS A SELECTIVE SOLVENT FOR RELATIVELY MORE AROMATIC
Claim 2
Dependent Claim
152 words
A PROCESS FOR TREATING A RESIDUAL OIL CONTAINING ASPHALTIC CONSTITUENTS WHICH COMPRISES HEATING SAID OIL TO AN ELEVATED TEMPERATURE UNDER VIS-BREAKING CONDITIONS, FRACTIONATING THE RESULTING VIS-BROKEN OIL TO YIELD A FIRST GAS OIL FRACTION AN A FIRST BOTTOMS FRACTION, FRACTIONATING SAID FIRST BOTTOMS FRACTION TO PRODUCE A SECOND GAS OIL FRACTION AND A SECOND BOTTOMS FRACTION, FRACTIONATING SAID FIRST OIL FRACTION TO SEPARATE THEREFROM CONSTITUENTS HAVING A BOILING POINT NOT GREATER THAN ABOUT 500*F. AND TO YIELD A THIRD BOTTOM FRACTION, SUBJECTING SAID SECOND BOTTOMS FRACTION TO LIQUID-LIQUID CONTACT WITH A LIQUID DEASPHALTING SOLVENT UNDER DEASPHALTING CONDITIONS TO SEPARTE ASPHALTIC CONSTITUENTS FROM SAID SECOND BOTTOMS FRACTION AND TO YIELD A DEASPHALTED OIL FRACTION, COMBINING SAID THIRD BOTTOMS FRACTION, SAID SECOND GAS OIL FRACTION AND SAID DEASPHALTED OIL FRACTION, SUBJECTING THE RESULTING COMBINED FRACTIONS TO LIQUIDLIQUID SOLVENT REFINING IN CONTACT WITH A LIQUID SOLVENT WHICH IS A SELECTIVE SOLVENT FOR RELATIVELY MORE AROMATIC
References Cited (Backward Citations)
US2006093A
Cited
US2279550A
Cited
US2228510A
Cited
US2608470A
Cited
US2692222A
Cited
US2663675A
Cited
US2696458A
Cited
US2793167A
Cited
US2793168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |