US3605656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnaces
Assignee: Calval Developments Ltd
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Filing: 1969-05-22
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Granted: 1971-09-20
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Expires: 1989-05-22
Abstract
Abstract THE INVENTION PROVIDES A FULLY AUTOMATIC FURNANCE FOR BURNING WASTE MATERIALS, HAVING A ROTATABLE HEARTH, AUXILIARY BURNERS AND COMBUSTION AIR INLETS DIRECTED TANGENTIALLY ON TO THE HEARTH, AND A PLOUGH FOR DEFLECTING WASTE MATERIAL DEPOSITED ON TO THE HEARTH FROM ONE TO ANOTHER OF THE CONCENTRIC PATHS SO THAT THE RESIDUE AFTER COMBUSTION IS DIRECTED INTO AN AXIAL ASH CHUTE.
Inventors
- 👤 John Brian Stribling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:44
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/24; F23G5/26; F23G5/50
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 |