US3621798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnaces for the combustion and destruction of waste materials
Assignee: AS MUSTADS FABRIKKER
•
Filing: 1969-09-16
•
Granted: 1971-11-23
•
Expires: 1989-09-16
Abstract
Abstract A FURNACE IS DISCLOSED, INTENDED FOR THE COMBUSTION AND DESTRUCTION OF WASTE MATERIALS, HE FURNACE BEING PROVIDED WITH AN EXTERNAL HEAT SOURCE AND A DOWNWARDLY TAPERING COMBUSTION CHAMBER. THE COMBUSTION CHAMBER IS PROVIDED WITH A SEPARATE REMOVABLE MANTLE OF SHEET MATERIAL SUPPORTED BY THE REFRACTORY LINING OF THE FURNACE. THE COMBUSTION CHAMBER MAY BE EXTENDED UPWARDLY BY TWO COAXIAL MANTLE, THE INNER MANTLE BEING REMOVABLE AND PREFERABLY MADE IN ONE PIECE WITH THE TAPERING MANTLE PORTION. COMBUSTION AIR IS FED TO THE COMBUSTION CHAMBER THROUGH SLOTS IN THE TAPERING MANTLE PORTION.
Inventors
- 👤 Frode Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:20
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |