Patent US3489670A successfully refreshed from Google Patents.
Patent US3564570A successfully refreshed from Google Patents.
US3564570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-solids separator
Assignee: Fuller Co
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Filing: 1968-03-08
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Granted: 1971-02-16
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Expires: 1988-03-08
Abstract
Abstract A DUST COLLECTING AND FILTER CLEANING APPARATUS HAVING A FILTER MEDIA CONSISTING OF A BED OF GRANULAR MATERIAL FOR REMOVING DUST FROM DUST LADEN GASES PASSING THERETHROUGH. WHEN THE BED BECOMES LOADED WITH DUST DEPOSITES, THE FLOW OF DUST LADEN GAS IS INTERUPTED AND A REVERSE FLOW OF CLEAN GAS IS PASSED UP THROUGH THE ENTIRE BED AREA FOR FLUIDIZING THE GRANULAR BED AND SIMULTANEOUSLY COMPRESSED AIR PIPES ARE MOVED THROUGH THE GRANULAR BED TO PRODUCE RAPID AGITATION OF LOCALIZED AREAS OF THE BED TO LIBERATE THE DEPOSITED DUST PARTICLES WHICH ARE CONVEYED OUT OF THE APPARATUS WITH THE REVERSE CLEAN GAS GLOW.
Inventors
- 👤 Roland L Lincoln
- 👤 Frank G Miller Jr
- 👤 Walter C Gothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |