Patent US3681750A successfully refreshed from Google Patents.
US2799136A
Expired / Lapsed
US
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Flame detection and control in aircraft engines
Assignee: Phillips Petroleum Co
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Filing: 1951-04-09
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Granted: 1957-07-16
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Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Boisblanc Deslonde R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:04
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F02; F02C; F02C7/00; F02C7/26; F02C7/262; F23N2235/00; F23N2235/12; F23N2235/16; F23N2241/00; F23N2241/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2324821A
Cited
US2418867A
Cited
US2316872A
Cited
US2361294A
Cited
US2463566A
Cited
US2546415A
Cited
GB616622A
Cited
GB618389A
Cited
US2538642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |