US2578332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water tube firebox for locomotive boilers
Assignee: Combustion Engineering Inc
•
Filing: 1946-02-12
•
Granted: 1951-12-11
•
Expires: 1966-02-12
Abstract
No abstract record available.
Inventors
- 👤 Williams Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
F; F22; F22B; F22B13/00; F22B13/06; F22B13/10; F22B13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US435386A
Cited
US1109526A
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US1172768A
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US1764981A
Cited
US1824434A
Cited
US1874236A
Cited
US1852284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |