US2646790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressive fuel combustion fluid heating apparatus and control means therefor
Assignee: COMMENTRY FOURCHAMBAULT ET DEC
•
Filing: 1949-01-31
•
Granted: 1953-07-28
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Expires: 1969-01-31
Abstract
No abstract record available.
Inventors
- 👤 Leonce M Reygagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
F; F23; F23C; F23C99/00; F28; F28F; F28F9/00; F28F9/22; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US448460A
Cited
US735337A
Cited
US1814010A
Cited
US2160481A
Cited
US2311350A
Cited
US2384836A
Cited
US2380169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |