US2641233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator
Assignee: Foster Wheeler Inc
•
Filing: 1947-02-19
•
Granted: 1953-06-09
•
Expires: 1967-02-19
Abstract
No abstract record available.
Inventors
- 👤 Henry H Hemenway
- 👤 John F Thunstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/22; F22B1/24; F22B21/00; F22B21/34; F22B21/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1174182A
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US1737757A
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US1737756A
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US1737759A
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US1737758A
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US2079932A
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US2139004A
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US2268776A
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GB554222A
Cited
US2366720A
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US2395530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |