Patent US868804A successfully refreshed from Google Patents.
Patent US3476945A successfully refreshed from Google Patents.
US3476945A
Expired / Lapsed
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Flame detector for a multiple fuel-fired furnace
Assignee: Elsag Bailey Inc
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Filing: 1968-02-23
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Granted: 1969-11-04
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Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond Golden
- 👤 Robert A Murzyn
- 👤 William E Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:17
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2223/00; F23N2223/54; F23N2227/00; F23N2227/12; F23N2227/14; F23N2229/00; F23N2229/14; F23N2229/18; F23N2231/00; F23N2231/20
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) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |