US3449055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control apparatus with prepurge timing
Assignee: Honeywell Inc
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Filing: 1967-11-22
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Granted: 1969-06-10
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Expires: 1987-11-22
Abstract
No abstract record available.
Inventors
- 👤 James C Blackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F23N5/20; F23N5/203; F23N2223/00; F23N2223/22; F23N2223/24; F23N2223/26; F23N2227/00; F23N2227/04; F23N2227/28; F23N2227/30; F23N2229/00; F23N2229/12; F23N2233/00; F23N2233/06; F23N5/18
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |