US2431158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner safety control
Assignee: Drying Systems Inc
•
Filing: 1942-07-04
•
Granted: 1947-11-18
•
Expires: 1962-07-04
Abstract
No abstract record available.
Inventors
- 👤 Robert E Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F23N2237/00; F23N2237/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2127977A
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US2112736A
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US2343001A
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US2245730A
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US2224119A
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US2243071A
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US2313943A
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US2260977A
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US2299501A
Cited
US2361294A
Cited
US2379871A
Cited
US2404001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |