Patent US3606280A successfully refreshed from Google Patents.
US3606280A
Expired / Lapsed
US
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Walking beam furnace construction
Assignee: Granco Equipment Inc
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Filing: 1969-11-14
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Granted: 1971-09-20
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Expires: 1989-11-14
Abstract
Abstract THIS DISCLOSURE RELATES TO A WALKING BEAM FURNACE FOR HEATING BILLETS TO HIGH TEMPERATURE IN WHICH THE BILLETS ARE SUPPORTED AT THE SIDES OF THE WALKING BEAM BY SPACED, REMOVABLE REFRACTORY BLOCKS. METAL CAPS ARE PLACED ON THE CORNERS OF THE REFRACTORY BLOCKS TO REDUCE WEAR ON THE CORNERS AS A RESULT OF CONTINUED CONTACT WITH THE BILLETS DURING THEIR MOVEMENT THROUGH THE FURNACE. SLOPING SURFACES ARE FORMED BETWEEN THE REFRACTORY BLOCKS TO FACILITATE THE ENVELOPING OF THE BILLETS WITH A HIGH HEAT INTENSITY FLAME WHILE THE BILLETS ARE SUPPORTED BY THE REFRACTORY BLOCKS.
Inventors
- 👤 Charles B Gentry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:12
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/201; F27B9/202; F27B9/206
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |