US2829007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for feeding a pulverized material, e. g., a pulverized catalyst
Assignee: Konink Zwavelzuurfabrieken V H
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Filing: 1954-10-07
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Granted: 1958-04-01
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Expires: 1974-10-07
Abstract
No abstract record available.
Inventors
- 👤 Klaas Van Waveren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:26
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF FEEDING A PULVERULENT MTERIAL FROM A STORAGE ZONE INTO A REACTION ZONE ATA PREDETERMINED RATE WHICH COMPRISESM MAINTINING MATERIAL FLUIDIZED IN A RELATIVELY SMALL FLUIDAZATION ZONE BELOW AND IN OPEN COMMUNNICATION WITH THE LARGER STORAGE ZONE BY INTRODUCTING FLUIDIZING GAS INTO THE BOTTOM OF SAID FLUIDIZATION ZONE AND WITHDRAING SAME FROM THE TOP OF SAID STORAGE ZONE AFTER PASSING THROUGH AND FLUIDING A CENTRAL COLUMN OF MATERIAL IN SAID STORAGE ZONE; WITHDRAWING FLUIDIZED MATERIAL AND FLUIDIZATION GASES FROM SAID FLUIDIZED ZONE; AND
Claim 2
Independent Claim
85 words
A METHOD OF FEEDING A PULVERULENT MTERIAL FROM A STORAGE ZONE INTO A REACTION ZONE ATA PREDETERMINED RATE WHICH COMPRISESM MAINTINING MATERIAL FLUIDIZED IN A RELATIVELY SMALL FLUIDAZATION ZONE BELOW AND IN OPEN COMMUNNICATION WITH THE LARGER STORAGE ZONE BY INTRODUCTING FLUIDIZING GAS INTO THE BOTTOM OF SAID FLUIDIZATION ZONE AND WITHDRAING SAME FROM THE TOP OF SAID STORAGE ZONE AFTER PASSING THROUGH AND FLUIDING A CENTRAL COLUMN OF MATERIAL IN SAID STORAGE ZONE; WITHDRAWING FLUIDIZED MATERIAL AND FLUIDIZATION GASES FROM SAID FLUIDIZED ZONE; AND
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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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |