Patent US4673867A successfully refreshed from Google Patents.
US2856908A
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Vapor generating and superheating unit with recycled gas flow
Assignee: Babcock and Wilcox Co
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Filing: 1953-03-27
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Granted: 1958-10-21
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Paul H Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:51
CPC Classifications
F; F22; F22G; F22G5/00; F22G5/02; F22B; F22B21/00; F22G5/06; F22G7/00; F22G7/14
Claims Analysis
Total Claims: 0
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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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |