US2647588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler tube fly ash collector
Assignee: Bituminous Coal Research Inc
•
Filing: 1950-01-16
•
Granted: 1953-08-04
•
Expires: 1970-01-16
Abstract
No abstract record available.
Inventors
- 👤 Carl E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US538589A
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US630023A
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US1923498A
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US1970077A
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US2182854A
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US2236358A
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US2370629A
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US2391860A
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US2415935A
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US2515894A
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US2569710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |