US2752899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual furnace and steam temperature control therefor
Assignee: Combustion Engineering Inc
•
Filing: 1952-12-30
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Granted: 1956-07-03
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Expires: 1972-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kasak David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:50
CPC Classifications
F; F22; F22G; F22G5/00; F22G5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775336A
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US2121537A
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US2034717A
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US2245209A
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US2334187A
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US2298700A
Cited
US2363875A
Cited
US2590712A
Cited
US2649079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |