US2575289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety burner control and ignition switching mechanism for providing a purging period
Assignee: C H DUTTON Co
•
Filing: 1947-09-15
•
Granted: 1951-11-13
•
Expires: 1967-09-15
Abstract
No abstract record available.
Inventors
- 👤 Homer C Nycum
- 👤 Clyde O Baird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:17
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/22; F23N2227/00; F23N2227/04; F23N2233/00; F23N2233/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1674051A
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US1961802A
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US2021647A
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US2297821A
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US2425589A
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US2501452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |