Patent US2549252A successfully refreshed from Google Patents.
US2549252A
Expired / Lapsed
US
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Underfeed stoker, including a fuel feeder preventing fuel drag-back
Assignee: Combustion Engineering Inc
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Filing: 1946-11-16
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Granted: 1951-04-17
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Expires: 1966-11-16
Abstract
No abstract record available.
Inventors
- 👤 John S Skelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:39
CPC Classifications
B; B65; B65D; B65D71/00; B65D71/0088; F; F23; F23K; F23K3/00; F23K3/10; F23K3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US566862A
Cited
US1312397A
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US1525472A
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US1767248A
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US2062076A
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US2049668A
Cited
US1936962A
Cited
US1989661A
Cited
US2228840A
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FR842131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |