Patent US2714877A successfully refreshed from Google Patents.
US2714877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure primary air heater
Assignee: Babcock and Wilcox Co
•
Filing: 1950-09-01
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Granted: 1955-08-09
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Expires: 1970-09-01
Abstract
No abstract record available.
Inventors
- 👤 Jr James D Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:19
CPC Classifications
F; F23; F23M; F23M20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2029284A
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US2134713A
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US2243430A
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Cited
GB527315A
Cited
US2330240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |