US2569969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal metering and cleanout block for stokers
Assignee: Will Burt Co
•
Filing: 1949-03-18
•
Granted: 1951-10-02
•
Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 Edward G Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:53
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/10; F23K3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348414A
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US879366A
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US1794326A
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US2314706A
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US2343707A
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US2452453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |