US3391915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed heat treatment apparatus
Assignee: Davy Loewy Ltd
•
Filing: 1964-02-27
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Granted: 1968-07-09
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Morgan Robert Frederic Jenkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:24
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
APPARATUS FOR ANNEALING ELONGATE METALLIC MATERIAL COMPRISING A FLUIDISED BED CONTAINER HAVING A SERIES OF CONTIGUOUS COMPARTMENTS ARRANGED VERTICALLY ABOVE ONE ANOTHER, MEANS FOR PASSING THE MATERIAL VERTICALLY THROUGH THE COMPARTMENTS IN SUCCESSION, AND MEANS FOR MAINTAINING FLUIDISED BEDS IN THE COMPARTMENTS AT PROGRESSIVELY INCREASING TEMPERATURES.
Claim 2
Dependent Claim
46 words
APPARATUS FOR ANNEALING ELONGATE METALLIC MATERIAL COMPRISING A FLUIDISED BED CONTAINER HAVING A SERIES OF CONTIGUOUS COMPARTMENTS ARRANGED VERTICALLY ABOVE ONE ANOTHER, MEANS FOR PASSING THE MATERIAL VERTICALLY THROUGH THE COMPARTMENTS IN SUCCESSION, AND MEANS FOR MAINTAINING FLUIDISED BEDS IN THE COMPARTMENTS AT PROGRESSIVELY INCREASING TEMPERATURES.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |