Patent US2947139A successfully refreshed from Google Patents.
US2947139A
Expired / Lapsed
US
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By-pass turbojet
Assignee: RTX Corp
•
Filing: 1957-08-29
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Granted: 1960-08-02
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Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 George F Hausmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:57
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/042; F02K; F02K3/00; F02K3/02; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2853227A
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US2689681A
Cited
US2672726A
Cited
US2811828A
Cited
US2790304A
Cited
US2788183A
Cited
US2841952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |