Patent US3558474A successfully refreshed from Google Patents.
US3558474A
Expired / Lapsed
US
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Slurry process for hydrorefining petroleum crude oil
Assignee: Universal Oil Products Co
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Filing: 1968-09-30
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Granted: 1971-01-26
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Expires: 1988-09-30
Abstract
Abstract A CATALYTIC SLURRY PROCESS FOR HYDROREFINING A HYDROCARBONACEOUS CHARGE STOCK CONTAINING HYDROCARBONINSOLUBLE ASPHALTENES. THE SLURRY IS A MIXTURE OF THE CHARGE STOCK AND FROM ABOUT 1.5% TO ABOUT 25.0% BY WEIGHT OF FINELY-DIVIDED SOLID PARTICLES OF NONSTOICHIO METRIC VANADIUM SULFIDE. THE PROCESS IS EFFECTED CONTINUOUSLY, AND PREFERABLY IN AN UPFLOW SYSTEM WHEREIN THE SLURRY IS INTRODUCED AT A LOWER PORTION OF A REACTION CHAMBER, AND THE PRODUCT EFFLUENT WITHDRAWN FROM AN UPPER PORTION.
Inventors
- 👤 William K T Gleim
- 👤 John G Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:22
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/16; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |