Patent US3139070A successfully refreshed from Google Patents.
US3139070A
Expired / Lapsed
US
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Vapor generating unit
Assignee: Babcock and Wilcox Co
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Filing: 1961-01-31
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Granted: 1964-06-30
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Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Sprague
- 👤 Johannes H Ammon
- 👤 Bertrand N Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:23
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B37/205; F22B1/00; F22B1/02; F22B1/023; F22B1/026; F22B1/08; F22B37/26; F22B37/268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE566747A
Cited
US1090144A
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US2174318A
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US2088931A
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US2229344A
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US2268730A
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US2862479A
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US2845906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |