US2486780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backdraft diverter for combustion gas outlet flues
Assignee: FAMOUS FURNACE CO
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Filing: 1946-10-26
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Granted: 1949-11-01
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Expires: 1966-10-26
Abstract
No abstract record available.
Inventors
- 👤 Fenberg Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:47
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/003; F23M9/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |