Patent US4352822B1 successfully refreshed from Google Patents.
US3620177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubbish incinerator
Assignee: Individual
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Filing: 1969-11-03
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Granted: 1971-11-16
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Expires: 1989-11-03
Abstract
Abstract AN INCINERATOR FOR RUBBISH AND THE LIKE, IN WHICH A SUBSTANTIALLY BOX-SHAPED STOKER PLUNGER OR PUSHER EXTENDS TIGHT-FITTING THROUGH THE SIDE OF A SHAFT OPPOSITE THE STOKER OPENING OF THE FIRE BOX AND THE BOTTOM OF THE SHAFT SO AS TO BE CAPABLE OF SLIDING BACKWARDS AND FORWARDS ALONG THE BOTTOM OF THE SHAFT WHILE SIMILAR TO A PLUNGER PUSHING THE FUEL BEFORE THE END SURFACE OF THE PLUNGER TOWARDS THE INLET OPENING AND IN ON THE GRATE, THE HEIGHT OF THE PLUNGER BEING SMALLER, PRIMARILY CONSIDERABLY SMALLER THAN THE HEIGHT OF THE INLET OPENING OF THE FIRE BOX.
Inventors
- 👤 Knud Giede Boving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08; F23G5/14; F23G5/16
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |