US2854398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of catalytic cracking feed stocks
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-02-24
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Granted: 1958-09-30
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Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
AN IMPROVED METHOD FOR TREATING PETROLEUM OILS COMPRISING THE STEPS OF CONTACTING A RESIDUAL OIL IN A DEASPHALTING ZONE WITH A LIQUEFIED SOLVENT COMPRISING NORMALLY GASEOUS HYDROCARBONS AND WITH A HYDROGENATED WASH OIL COMPRISING MAJOR PORPORTIONS OF AROMATIC MOLECULES BOILING ABOVE 900*F. DISPLAYING HYDROGEN DONOR PROPERTIES TO OBTAIN A DEASPHALTED OIL PHASE SUBSTANTIALLY FREE FROM METAL CONTAMINANTS AND AN ASPHALTIC PHASE CONTINUING A MAJOR PORTION OF SAID WASH OIL, RECOVERING A CATALYTIC CRACKING CHARGING STOCK FROM SAID DEASPHALTED OIL PHASE, THERMALLY TREATING SAID ASPHALTIC PHASE UNDER HYDROGEN DONOR DILUENT CRACKING CONDITIONS TO OBTAIN LIGHTER DISTILLATE FRACTIONS, CATALYTICALLY CRACKING SAID CATALYTIC CRACKING CHARGING STOCK, SEPARATING THE CATALYTICALLY CRACKED MATERIALS TO OBTAIN HEAVY CYCLE OILS, AND PARTIALLY HYDROGENATING SAID HEAVY CYCLE OILS TO OBTAIN SAID WASH OIL.
References Cited (Backward Citations)
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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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |