US3834927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed coating method
Assignee: KOERPER ENG ASS Inc
•
Filing: 1973-07-27
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Granted: 1974-09-10
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Expires: 1993-07-27
Abstract
Abstract A BED OF HEAT FUSIBLE PLASTIC MATERIAL IN PULVERULENT OR PARTICULATE FORM IS FLUIDIZED BY SIMULTANEOUSLY VIBRAING IT AND AERATAING THE SAME FROM THE BOTTOM. AERATING GAS IS CONSTRAINED TO ENTER THE BOTTOM OF THE BED AT A LOCALIZED INFLUX ZONE THAT IS SMALLER IN AREA THAN THE UPPER FREE SURFACE OF THE BED. THE INFLUX ZONE IS SITUATED TO EFFECT CONTINUOUS MIGRATION OF THE PULVERULENT OR PARTICULATE MATERIAL OF WHICH EXTENDS HORIZONTALLY THROUGH THE UPPER PONENET OF WHICH EXTENDS HORIZONTALLY THROUG THE UPPER STRATA OF THE BED, TO THEREBY PREVENT THE FORMATION OF GEYSERS AND DEFINE A SMOOTH UPPER FREE SURFACE FOR THE BED.
Inventors
- 👤 G Putney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
B; B05; B05C; B05C19/00; B05C19/02; Y; Y10; Y10S; Y10S118/00; Y10S118/05
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |