US3412293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control apparatus with photodarlington flame detector
Assignee: Honeywell Inc
•
Filing: 1965-12-13
•
Granted: 1968-11-19
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Maupin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:15
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F16; F16K; F16K31/00; F16K31/44; F16K31/48; F16K31/485; F23N5/02; F23N5/08; F23N5/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948815A
Cited
US3001077A
Cited
US3280333A
Cited
US3238423A
Cited
US3294974A
Cited
US3270799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |