US2614541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature fluid heater
Assignee: Combustion Engineering Inc
•
Filing: 1946-12-14
•
Granted: 1952-10-21
•
Expires: 1966-12-14
Abstract
No abstract record available.
Inventors
- 👤 Wilbur H Armacost
- 👤 David M Schoenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:28
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/22; F22B21/24; F22B31/00; F22B31/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342073A
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US1936699A
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US1979639A
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US2090504A
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US2041364A
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US2103719A
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US2146497A
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US2174663A
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US2288749A
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US2333331A
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |