Patent US2693173A successfully refreshed from Google Patents.
US2693173A
Expired / Lapsed
US
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Spreader stoker fired furnace
Assignee: Babcock and Wilcox Co
•
Filing: 1949-08-27
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Granted: 1954-11-02
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Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles L Marquez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:28
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511935A
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US1823050A
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US1864366A
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GB369925A
Cited
US2110452A
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US2347574A
Cited
US2333631A
Cited
US2416053A
Cited
US2476567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |