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US2856906A
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Boiler
Assignee: Combustion Engineering Inc
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Filing: 1954-11-15
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Granted: 1958-10-21
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Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Wilbur H Armacost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:54
CPC Classifications
F; F22; F22B; F22B33/00; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/141; F22G; F22G5/00; F22G5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860364A
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US2003419A
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US2312375A
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US2325384A
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US2320911A
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US2418815A
Cited
US2583599A
Cited
GB682121A
Cited
US2697420A
Cited
GB693029A
Cited
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 |