US2853426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent deasphalting of residual oils with wash oil to remove metal contaminants
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-03-10
•
Granted: 1958-09-23
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Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Nick P Peet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:19
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD FOR TREATING A PETROLEUM FRACTION FEED STOCK CONTAINING A MAJOR PORTION OF COMPONENTS BOILING ABOVE 900*F. AND CONTAMINATED BY A SUBSTANTIAL AMOUNT OF METAL CONTAMINANTS WHICH COMPRISES COUNTERCURRENTLY CONTACTING SAID FEED STOCK IN A DEASPHALTING ZONE WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON IN SIMULTANEOUS COUNTERCURRENT CONTACT WITH A SEPARATELY INTRODUCED FRACTION OF CATALYST CYCLE STOCK UNDER CONDITIONS TO FORM AA DEASPHALTED OIL PHASE SUBSTANTIALLY FREE FROM METAL CONTAMINANTS AND AN ASPHALT PHASE CONTAINING SUBSTANTIALLY ALL OF THE METAL CONTAMINANTS OF THE FEED STOCK AND SEPARATELY WITHDRAWING SAID PHASES, SAID FRACTION OF CATALYTIC CYCLE STOCK HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF ABOUT 1.05 TO 1.2.
Claim 2
Independent Claim
108 words
A METHOD FOR TREATING A PETROLEUM FRACTION FEED STOCK CONTAINING A MAJOR PORTION OF COMPONENTS BOILING ABOVE 900*F. AND CONTAMINATED BY A SUBSTANTIAL AMOUNT OF METAL CONTAMINANTS WHICH COMPRISES COUNTERCURRENTLY CONTACTING SAID FEED STOCK IN A DEASPHALTING ZONE WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON IN SIMULTANEOUS COUNTERCURRENT CONTACT WITH A SEPARATELY INTRODUCED FRACTION OF CATALYST CYCLE STOCK UNDER CONDITIONS TO FORM AA DEASPHALTED OIL PHASE SUBSTANTIALLY FREE FROM METAL CONTAMINANTS AND AN ASPHALT PHASE CONTAINING SUBSTANTIALLY ALL OF THE METAL CONTAMINANTS OF THE FEED STOCK AND SEPARATELY WITHDRAWING SAID PHASES, SAID FRACTION OF CATALYTIC CYCLE STOCK HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF ABOUT 1.05 TO 1.2.
References Cited (Backward Citations)
US1978361A
Cited
US2053485A
Cited
US2323047A
Cited
US2700637A
Cited
US2727853A
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |