Patent US3679576A successfully refreshed from Google Patents.
US3679576A
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US
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Fluidized catalytic cracking apparatus and process
Assignee: COMMONWEALTH OIL REFINING Co Inc
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Filing: 1970-01-06
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Granted: 1972-07-25
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Expires: 1990-01-06
Abstract
Abstract A PROCESS AND APPARATUS FOR THE CATALYST CRACKING OF HYDROCARBONS UNDER FLUID CATALYTIC CRACKING CONDITIONS WHEREIN THE MAXIMUM EFFICIENCY IS OBTAINED FROM A CATALYST BY SERIALLY CONTACTING VARIOUS HYDROCARBON FEEDS WITH A CATALYST IN AN APPARATUS PROVIDING A PLURALITY OF RISER REACTORS CONNECTED IN SERIES. WITH THE USE OF THIS APPARATUS AND PROCESS, THE MAXIMUM USE IS MADE OF THE CATALYST BEFORE REGENERATION OF THE CATALYST IS NECESSARY.
Inventors
- 👤 Gerald W G Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:16
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |