US2560356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized powder flow and control
Assignee: Shell Development Co
•
Filing: 1947-07-01
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Granted: 1951-07-10
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Expires: 1967-07-01
Abstract
No abstract record available.
Inventors
- 👤 George E Liedholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:02
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A PROCESS FOR CONTACTING TWO GASEOUS FLUIDS A AND B IN SEPARATE CONTACT ZONES 1 AND 2 ZONE 1 BEING ABOVE ZONE 2 WITH A FLUIDIZED POWDER WHICH IS CONTINUOUSLY RECYCLED THROUGH SAID ZONES, THE COMBINATION OF STEPS COMPRISING PASSING FLUID B THROUGH LOWER ZONE 2 COUNTERCURRENT TO THE FLOW OF POWDER THERETHROUGH AT A SUBSTANTIALLY CONSTANT RATE SUFFICIENT TO MAINTAIN THE POWDER IN SAID ZONE IN A PSEUDO LIQUID STATE, MAINTAINING A POSITIVE SUPERATMOSPHERIC PRESSURE OF SAID FLUID B ABOVE THE PSEUDO LIQUID POWDER IN SAID ZONE, ALLOWING PSEUDO LIQUID POWDER FROM THE LOWER ZONE 2 TO PASS UNHINDERED AND CONTINUOUSLY BY THE FORCE OF GRAVITY AND SAID POSITIVE PRESSURE INTO A TRANSFER ZONE, SAID TRANSFER ZONE COMMUNICATING WITH THE BOTTOMS OF THE UPPER AND LOWER ZONES 1 AND 2 AND BEING OF RESTRICTED CROSS SECTION COMPARED TO SAID LOWER ZONE 2. MAINTAINING A BED OF SAID POWDER IN
Claim 2
Dependent Claim
151 words
IN A PROCESS FOR CONTACTING TWO GASEOUS FLUIDS A AND B IN SEPARATE CONTACT ZONES 1 AND 2 ZONE 1 BEING ABOVE ZONE 2 WITH A FLUIDIZED POWDER WHICH IS CONTINUOUSLY RECYCLED THROUGH SAID ZONES, THE COMBINATION OF STEPS COMPRISING PASSING FLUID B THROUGH LOWER ZONE 2 COUNTERCURRENT TO THE FLOW OF POWDER THERETHROUGH AT A SUBSTANTIALLY CONSTANT RATE SUFFICIENT TO MAINTAIN THE POWDER IN SAID ZONE IN A PSEUDO LIQUID STATE, MAINTAINING A POSITIVE SUPERATMOSPHERIC PRESSURE OF SAID FLUID B ABOVE THE PSEUDO LIQUID POWDER IN SAID ZONE, ALLOWING PSEUDO LIQUID POWDER FROM THE LOWER ZONE 2 TO PASS UNHINDERED AND CONTINUOUSLY BY THE FORCE OF GRAVITY AND SAID POSITIVE PRESSURE INTO A TRANSFER ZONE, SAID TRANSFER ZONE COMMUNICATING WITH THE BOTTOMS OF THE UPPER AND LOWER ZONES 1 AND 2 AND BEING OF RESTRICTED CROSS SECTION COMPARED TO SAID LOWER ZONE 2. MAINTAINING A BED OF SAID POWDER IN
References Cited (Backward Citations)
US2419245A
Cited
US2414852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |