Patent US3259998A successfully refreshed from Google Patents.
US3259998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the fluidization of powdered materials
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1963-08-07
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Granted: 1966-07-12
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Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Leclere Jean-Claude
- 👤 Rouanet Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:21
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01F; B01F33/00; B01F33/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A DEVICE FOR THE FLUIDIZATION OF PULVERULENT MATERIAL, COMPRISING, IN COMBINATION, AN UPRIGHT VESSEL HAVING A BOTTOM WALL FORMED WITH AT LEAST ONE OUTLET OPENING THEREIN THE LATTER DIRECTLY COMMUNICATING WITH THE INTERIOR OF SAID VESSEL, AND INCLUDING A PERIPHERAL WALL EXTENDING UPWARDLY FROM THE PERIPHERAL PORTION OF SAID BOTTOM WALL; A PLURALITY OF TUBES LOCATED ADJACENT SAID BOTTOM WALL AND EXTENDING IN SUBSTANTIALLY RADIAL DIRECTION FROM A PERIPHERAL ZONE OF SAID VESSEL TOWARDS THE CENTER THEREOF, SAID TUBES HAVING TOP FACES DIRECTED UPWARDLY AWAY FROM SAID BOTTOM WALL AND BEING FORMED WITH SUBSTANTIALLY UPWARDLY DIRECTED APERTURES; AND COMPRESSED GAS DISTRIBUTING MEANS OPERATIVELY CONNECTED TO SAID TUBES, RESPECTIVELY, FOR INTRODUCING COMPRESSED GAS INTO THE SAME.
Claim 2
Independent Claim
115 words
A DEVICE FOR THE FLUIDIZATION OF PULVERULENT MATERIAL, COMPRISING, IN COMBINATION, AN UPRIGHT VESSEL HAVING A BOTTOM WALL FORMED WITH AT LEAST ONE OUTLET OPENING THEREIN THE LATTER DIRECTLY COMMUNICATING WITH THE INTERIOR OF SAID VESSEL, AND INCLUDING A PERIPHERAL WALL EXTENDING UPWARDLY FROM THE PERIPHERAL PORTION OF SAID BOTTOM WALL; A PLURALITY OF TUBES LOCATED ADJACENT SAID BOTTOM WALL AND EXTENDING IN SUBSTANTIALLY RADIAL DIRECTION FROM A PERIPHERAL ZONE OF SAID VESSEL TOWARDS THE CENTER THEREOF, SAID TUBES HAVING TOP FACES DIRECTED UPWARDLY AWAY FROM SAID BOTTOM WALL AND BEING FORMED WITH SUBSTANTIALLY UPWARDLY DIRECTED APERTURES; AND COMPRESSED GAS DISTRIBUTING MEANS OPERATIVELY CONNECTED TO SAID TUBES, RESPECTIVELY, FOR INTRODUCING COMPRESSED GAS INTO THE SAME.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |