US2654353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Header integral with and sealed into boiler casing
Assignee: Combustion Engineering Inc
•
Filing: 1952-02-28
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Granted: 1953-10-06
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Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Edward W Ludt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190012364A
Cited
US1804780A
Cited
US1727177A
Cited
US1761567A
Cited
US1925847A
Cited
US2172227A
Cited
US2169934A
Cited
US2395580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |