US2900524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for deriving average intensity of flame and comparing instantaneous intensity therewith incorporating automatic gain control
Assignee: General Controls Co
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Filing: 1953-10-22
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Granted: 1959-08-18
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Expires: 1973-10-22
Abstract
No abstract record available.
Inventors
- 👤 Peterson Robert Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:39
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2227/00; F23N2227/38; F23N2229/00; F23N2229/08
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |