US2925330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for countercurrently contacting a gas with a finely divided solid
Assignee: Stamicarbon BV
•
Filing: 1955-03-04
•
Granted: 1960-02-16
•
Expires: 1975-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jan J A Knops
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:41
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN AN APPARATUS OF THE TYPE DESCRIBED HAVING MEANS FOR CONTAINING A BED OF SOLID PARTICLES, MEANS FOR FLOWING A GAS UPWARDLY INTO SAID BED TO MAINTAIN THE SAME IN A FLUIDIZED STATE, MEANS FOR DISCHARGING SOLID PARTICLES FROM THE FLUIDZIED BED AND A FEED PIPE HAVING A DISCHARGE OPENING IN ITS LOWER END FOR FEEDING SOLID PARTICLES DOWNWARDLY INTO THE FLUIDIZED BED IN OPPOSITION TO THE FLOW OF GAS, THE IMPROVEMENT COMPRISING SHROUD MEANS DISPOSED ADJACENT THE LOWER END OF SAID FEED PIPE WITHIN THE FLUIDIZED BED FOR FACILITATING THE FEED OF SOLID PARTICLES INTO THE FLUIDIZED BED IN OPPOSITION TO THE FLOW OF GAS, SAID SHROUD MEANS INCLUDING A SLEEVE HAVING A LOWER OPENING BELOW THE DISCHARGE OPENING OF SAID FEED TUBE IN UNOBSTRUCTED COMMUNICATION WITH THE FLUIDIZED BED WHEREBY THE GAS AND PARTICLES IN THE FLUIDIZED BED CAN PASS FREELY THROUGH THE OPENING, SAID LOWER SLEEVE OPENING HAVING A CROSS-SECTIONAL AREA FROM APPROXIMATELY ONE-HALF TO APPROXIMATELY EQUAL THE CROSS-SECTIONAL AREA OF SAID
Claim 2
Dependent Claim
165 words
IN AN APPARATUS OF THE TYPE DESCRIBED HAVING MEANS FOR CONTAINING A BED OF SOLID PARTICLES, MEANS FOR FLOWING A GAS UPWARDLY INTO SAID BED TO MAINTAIN THE SAME IN A FLUIDIZED STATE, MEANS FOR DISCHARGING SOLID PARTICLES FROM THE FLUIDZIED BED AND A FEED PIPE HAVING A DISCHARGE OPENING IN ITS LOWER END FOR FEEDING SOLID PARTICLES DOWNWARDLY INTO THE FLUIDIZED BED IN OPPOSITION TO THE FLOW OF GAS, THE IMPROVEMENT COMPRISING SHROUD MEANS DISPOSED ADJACENT THE LOWER END OF SAID FEED PIPE WITHIN THE FLUIDIZED BED FOR FACILITATING THE FEED OF SOLID PARTICLES INTO THE FLUIDIZED BED IN OPPOSITION TO THE FLOW OF GAS, SAID SHROUD MEANS INCLUDING A SLEEVE HAVING A LOWER OPENING BELOW THE DISCHARGE OPENING OF SAID FEED TUBE IN UNOBSTRUCTED COMMUNICATION WITH THE FLUIDIZED BED WHEREBY THE GAS AND PARTICLES IN THE FLUIDIZED BED CAN PASS FREELY THROUGH THE OPENING, SAID LOWER SLEEVE OPENING HAVING A CROSS-SECTIONAL AREA FROM APPROXIMATELY ONE-HALF TO APPROXIMATELY EQUAL THE CROSS-SECTIONAL AREA OF SAID
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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |