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US2617252A
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Rotary turbocompressor jet engine after-burner
Assignee: Douglas Aircraft Co Inc
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Filing: 1947-11-07
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Granted: 1952-11-11
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Expires: 1967-11-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/38; F23R3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2409176A
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US2416389A
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US2479777A
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US2538179A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |