US3074882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum treating process involving solvent deasphalting and propane fractionation
Assignee: Texaco Inc
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Filing: 1959-02-02
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Granted: 1963-01-22
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Expires: 1979-02-02
Abstract
No abstract record available.
Inventors
- 👤 Howard H Gross
- 👤 Robert L Murphey
- 👤 Jr Marshall R Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PETROLEUM TREATING OPERATION WHICH COMPRISES SOLVENT DEASPHALTING A PETROLEUM RESIDUUM EMPLOYING A LIQUEFIED C4 HYDROCARBON AS THE DEASPHALTING SOLVENT, SUBJECTING THE RESULTING DEASPHALTED PETROLEUM RESIDUUM TO A FIRST PROPANE FRACTIONATION OPERATION TO SEPARATE THEREFROM A FIRST OIL FRACTION AND A FIRST BOTTOMS FRACTION, SUBJECTING SAID FIRST BOTTOMS FRACTION TO A SECOND PROPANE FRACTIONATION OPERATION TO SEPARATE THEREFROM A SECOND OIL FRACTION AND A SECOND BOTTOMS FRACTION, SAID FIRST PROPANE FRACTIONATION OPERATION BEING CARRIED OUT UNDER CONDITIONS MORE SEVERE THAN SAID SECOND PROPANE FRACTIONATION OPERATION INCLUDING A TEMPERATURE WITHIN THE RANGE OF 5 TO 60* F. ABOVE SAID SECOND PROPANE FRACTIONATION OPERATION, AND PASSING SAID SECOND BOTTOM FRACTION TO THE SOLVENT DEASPHALTING OPERATION.
Claim 2
Dependent Claim
113 words
A PETROLEUM TREATING OPERATION WHICH COMPRISES SOLVENT DEASPHALTING A PETROLEUM RESIDUUM EMPLOYING A LIQUEFIED C4 HYDROCARBON AS THE DEASPHALTING SOLVENT, SUBJECTING THE RESULTING DEASPHALTED PETROLEUM RESIDUUM TO A FIRST PROPANE FRACTIONATION OPERATION TO SEPARATE THEREFROM A FIRST OIL FRACTION AND A FIRST BOTTOMS FRACTION, SUBJECTING SAID FIRST BOTTOMS FRACTION TO A SECOND PROPANE FRACTIONATION OPERATION TO SEPARATE THEREFROM A SECOND OIL FRACTION AND A SECOND BOTTOMS FRACTION, SAID FIRST PROPANE FRACTIONATION OPERATION BEING CARRIED OUT UNDER CONDITIONS MORE SEVERE THAN SAID SECOND PROPANE FRACTIONATION OPERATION INCLUDING A TEMPERATURE WITHIN THE RANGE OF 5 TO 60* F. ABOVE SAID SECOND PROPANE FRACTIONATION OPERATION, AND PASSING SAID SECOND BOTTOM FRACTION TO THE SOLVENT DEASPHALTING OPERATION.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |