US2654218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ash handling system for high-pressure combustion of pulverized solid fuels
Assignee: Bituminous Coal Research Inc
•
Filing: 1948-06-03
•
Granted: 1953-10-06
•
Expires: 1968-06-03
Abstract
No abstract record available.
Inventors
- 👤 John I Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:44
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US730782A
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GB168406A
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US1814560A
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US2055385A
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US2187627A
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US2288734A
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US2192885A
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US2399884A
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US2375436A
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US2440380A
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US2401285A
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US2509246A
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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) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |