US3057309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant flow stoker
Assignee: FLYNN AND EMRICH CO
•
Filing: 1959-08-18
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Granted: 1962-10-09
•
Expires: 1979-08-18
Abstract
No abstract record available.
Inventors
- 👤 James F Turner
- 👤 William H Bartman
- 👤 Jr Clarence Henry Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:12
CPC Classifications
F; F23; F23H; F23H7/00; F23G; F23G5/00; F23G5/002; F23G5/50; F23H7/06; F23H7/10; F23K; F23K3/00; F23K3/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/87169; Y10T137/87193; Y10T137/87201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946044A
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US2110977A
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US1993819A
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GB435760A
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US2269273A
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US2240898A
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US2274226A
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FR869770A
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US2697329A
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DE1019427B
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US2752756A
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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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |