US3585732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drying solids
Assignee: General American Transportation Corp
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Filing: 1969-05-12
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Granted: 1971-06-22
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Expires: 1989-05-12
Abstract
Abstract A FLUIDIZED BED-DRYER WITH HEAT-EXCHANGE ELEMENTS IN THE FORM OF PILLOW-SHAPED ENVELOPES HAVING THE SIDE DIMENSIONS THEREOF EXPOSED TO THE GLOW OF PARTICULATE MATTER IN THE FLUIDIZED BED SUBSTANTIALLY GREATER THAN THE EDGE DIMENSION THEREOF EXPOSED TO THE UPWARD FLOW OF FLUIDIZING GAS IN THE FLUIDIZED BED. THE PILLOW-SHAPED ENVELOPES ARE DISPOSED IN THE FLUIDIZED BED AT VARIOUS ANGLE WITH RESPECT TO THE PARTICULATE MATTER FLOW PATH TO CAUSE THE PARTICULATE MATTER TO FLOW ALONG A SINUOUS PATH. THE PILLOWSHAPED ENVELOPES MAY HAVE SINUOUS SIDES.
Inventors
- 👤 Thoru Itahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; B01J8/24; B01J8/36
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |