US2821175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant vapor generator with radiant superheater in furnace wall quiescent zones
Assignee: Babcock and Wilcox Co
•
Filing: 1953-03-10
•
Granted: 1958-01-28
•
Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Seidl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:57
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/40; F22G; F22G1/00; F22G1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH13646A
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US1667833A
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GB373860A
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US2109840A
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FR832563A
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US2250849A
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US2308762A
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US2519566A
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US2685279A
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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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |