Patent US2979899A successfully refreshed from Google Patents.
US2979899A
Expired / Lapsed
US
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Flame spreading device for combustion equipments
Assignee: Safran Aircraft Engines SAS
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Filing: 1954-05-03
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Granted: 1961-04-18
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Salmon Benjamin
- 👤 Jean H Bertin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18; F23R3/20; F23R3/26; F23R3/28; F23R3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2219696A
Cited
US2475911A
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US2526122A
Cited
US2457157A
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US2552492A
Cited
FR1000961A
Cited
US2672727A
Cited
US2771743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |