US3698874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust control apparatus for fluidized bed reactors
Assignee: Individual
•
Filing: 1970-07-23
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Granted: 1972-10-17
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Expires: 1990-07-23
Abstract
Abstract AN IMPROVED SYSTEM FOR REDUCING DUST EMISSION TO THE ATMOSPHERE FROM A FLUIDIZED BED REACTOR. THE SYSTEM EMPLOYS CYCLONE SEPARATORS ONE OF WHICH, IN ADDITION TO RETURNING SEPARATED PARTICLES TO THE BED THROUGH A DIP-LEG, IS PROVIDED WITH MEANS BYPASSING A SMALL PART OF THE GAS STREAM TO A FILTERING SYSTEM. THE SYSTEM REDUCES DUST EMISSION BY SUBJECTING PART OF THE GAS STREAM CARRYING NON-SEPARABLE PARTICLES AS AN UNDERFLOW STREAM TO A FILTERING OPERATION WHILE RETURNING SEPERATED FINES TO THE FLUID BED.
Inventors
- 👤 Frederick A Zenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:01
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055; B01D; B01D53/00; B01D53/34; B04; B04C; B04C9/00; B04C2009/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |