Patent US2614543A successfully refreshed from Google Patents.
US2614543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced circulation boiler
Assignee: Individual
•
Filing: 1947-04-01
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Granted: 1952-10-21
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Expires: 1967-04-01
Abstract
No abstract record available.
Inventors
- 👤 James W Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:02
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22B35/102; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2296969A
Cited
US2321390A
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US2394885A
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US2438719A
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |