US3782931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for sintering annular compacts
Assignee: Motor Wheel Corp
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Filing: 1971-01-11
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Granted: 1974-01-01
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Expires: 1991-01-11
Abstract
Abstract A METHOD AND APPARATUS FOR SINTERING ANNULAR COMPACTS WITHOUT ANY SUBSTANTIAL TEMPERATURE GRADIENTS THROUGH THE COMPACTS. THE METHOD INVOLVES AXIAL MOVEMENT OFTHE COMPACT THROUGH VERTICAL HEATING AND COOLING TOWERS OF A CONTROLLED ATMOSPHERE FURNACE WITH LATERAL MOVEMENT OF THE COMPACT THRHOUGH A CROSSOVER CONDUIT INTERCONNECTING THE UPPER ENDS OF THE TOWERS. TH LOWER END OF THE HEATING TOWER IS PROVIDED WITH AN INLET OPENING IN CONSTANT COMMUNICATION WITH THE EXTERIOR OF THE FURNACE AND THE LOWER END OF THE COOLING TOWER HAS THE OUTLET CONNECTED VIA A SEALABLE EXIT CHAMBER WITH THE EXTERIOR OF THE FURNACE.
Inventors
- 👤 A Brede
- 👤 C Talmage
- 👤 E Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/10; B22F3/00; B22F3/12; B22F2998/00
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |