Patent US2812015A successfully refreshed from Google Patents.
US2812015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion and flame detecting
Assignee: —
•
Filing: —
•
Granted: 1957-11-05
•
Expires: 1974-11-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F23D; F23D2208/00; F23D2208/10; F23D2900/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1899744A
Cited
US2173115A
Cited
US2282551A
Cited
US2538952A
Cited
US2541236A
Cited
US2698655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |