US3826737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic treatment of hydrocarbon oils
Assignee: Shell USA Inc
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Filing: 1973-02-06
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Granted: 1974-07-30
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Expires: 1993-02-06
Abstract
Abstract A CONTUNUOUS PROCESS AND APPARATUS FOR THE CATALYTIC TREATMENT OF HYDROCARBON OILS WHEREIN AN OIL IS PASSED OVER A CATALYST BED WITHIN A REACTOR, THE BOTTOM OF WHICH CONTAINS A CATALYST DISCHARGE FUNNEL INCORPORATING A SCREEN FOR SEPARATING CATALYST AND OIL AT A POINT ABOVE THE EXIT OF THE FUNNEL, FRESH CATALYST BEING INTRODUCED AT THE TOP OF THE CATALYST BED AND SPENT CATALYST BEING WITHDRAWN AT THE BOTTOM THEREOF WHILE THE PROCESS IS OPERATING. THE CATALYST DISCHARGE FUNNEL PREFERABLY CONSISTS OF AT LEAST TWO INVERTED CONICAL SECTIONS CONNECTED BY MEANS OF A CYLINDRICAL SCREEN SECTION.
Inventors
- 👤 A Pegels
- 👤 J Wijffels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/10; C10G35/12; B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; C10G49/00; C10G49/10; C10G49/14
Claims Analysis
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |