US2809616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generating and superheating unit with pendent superheater platens
Assignee: Babcock and Wilcox Co
•
Filing: 1952-03-21
•
Granted: 1957-10-15
•
Expires: 1972-03-21
Abstract
No abstract record available.
Inventors
- 👤 John T Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:55
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/143; F22B37/20; F22B37/202; F22G; F22G1/00; F22G1/06; F28; F28D; F28D7/00; F28D7/0041; F28F; F28F2275/00; F28F2275/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2308762A
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US2415123A
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US2403237A
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US2567058A
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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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |