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Patent US2520388A successfully refreshed from Google Patents.
US2520388A
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US
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Apparatus for supporting combustion in fast-moving air streams
Assignee: Power Jets Research and Development Ltd
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Filing: 1947-11-19
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Granted: 1950-08-29
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Expires: 1967-11-19
Abstract
No abstract record available.
Inventors
- 👤 Earl Allan Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:17
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18; F23R3/20; F23R3/28; F23R3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2404335A
Cited
US2410881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |