US3431084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed-bed catalytic operations
Assignee: BP PLC
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Filing: 1966-09-07
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Granted: 1969-03-04
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Expires: 1986-09-07
Abstract
No abstract record available.
Inventors
- 👤 George Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:23
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/008; B01J; B01J8/00; B01J8/02; B01J8/0278; C; C10; C10G; C10G49/00; C10G49/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
APPARATUS SUITABLE FOR CARRYING OUT FIXED-BED CATALYTIC REACTIONS COMPRISING A CLOSED, VERTICAL REACTOR CAPABLE OF HOLDING A BED OF CATALYST AND HAVING AN UPPER INLET AND A LOWER OUTLET, A TRAY ACROSS THE UPPER PART OF THE VESSEL, CHIMNEYS EXTENDING UPWARDLY FROM THE TRAY, SCREENING MEANS WITHIN THE CHIMNEYS EXTENDING DOWNWARDLY THROUGH THE CHIMNEYS INTO THE CATALYST BED WHEN THE LATTER IS IN POSITION, AND COWLS ABOVE THE CHIMENYS, HAVING TWO ENTRANCES ONE ABOVE THE OTHER, WHICH ALLOW ENTRY OF FLUIDS INTO AND THROUGH THE CHIMNEY ONLY WITH AN INITIALLY UPWARD DIRECTION OF FLOW, THE LOWER ENTRANCE BEING ON A HORIZONTAL LEVEL WITH THE TOP OF THE CHIMNEY AND THE UPPER ENTRANCE BEING ABOVE THE TOP OF THE CHIMNEY.
Claim 2
Dependent Claim
119 words
APPARATUS SUITABLE FOR CARRYING OUT FIXED-BED CATALYTIC REACTIONS COMPRISING A CLOSED, VERTICAL REACTOR CAPABLE OF HOLDING A BED OF CATALYST AND HAVING AN UPPER INLET AND A LOWER OUTLET, A TRAY ACROSS THE UPPER PART OF THE VESSEL, CHIMNEYS EXTENDING UPWARDLY FROM THE TRAY, SCREENING MEANS WITHIN THE CHIMNEYS EXTENDING DOWNWARDLY THROUGH THE CHIMNEYS INTO THE CATALYST BED WHEN THE LATTER IS IN POSITION, AND COWLS ABOVE THE CHIMENYS, HAVING TWO ENTRANCES ONE ABOVE THE OTHER, WHICH ALLOW ENTRY OF FLUIDS INTO AND THROUGH THE CHIMNEY ONLY WITH AN INITIALLY UPWARD DIRECTION OF FLOW, THE LOWER ENTRANCE BEING ON A HORIZONTAL LEVEL WITH THE TOP OF THE CHIMNEY AND THE UPPER ENTRANCE BEING ABOVE THE TOP OF THE CHIMNEY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |