Patent US2823627A successfully refreshed from Google Patents.
US2823627A
Expired / Lapsed
US
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Cold wall combustor with flexibly mounted flame tube
Assignee: Bituminous Coal Research Inc
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Filing: 1951-11-19
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Granted: 1958-02-18
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Buckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:05
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268464A
Cited
US2500925A
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GB610641A
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US2509503A
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US2448561A
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US2477583A
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US2513325A
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US2510645A
Cited
US2547619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |