US2804131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame responsive safety control system using prism and light chopper
Assignee: General Controls Co
•
Filing: 1953-06-05
•
Granted: 1957-08-27
•
Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Joe T Ator
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2229/00; F23N2229/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1755970A
Cited
US1811895A
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US1996233A
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US1970103A
Cited
US2304641A
Cited
US2404147A
Cited
US2404903A
Cited
US2621808A
Cited
US2696876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |