Patent US2822865A successfully refreshed from Google Patents.
US2822865A
Expired / Lapsed
US
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Burner safety control system
Assignee: Individual
•
Filing: 1954-08-16
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Granted: 1958-02-11
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Frank P Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:55
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; C; C21; C21B; C21B9/00; C21B9/10; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23N2239/00; F23N2239/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2020710A
Cited
US2127445A
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US2212352A
Cited
US2297821A
Cited
US2385699A
Cited
US2474941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |