US2689452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for increasing the thrust of turbojet engines
Assignee: RTX Corp
•
Filing: 1949-12-02
•
Granted: 1954-09-21
•
Expires: 1969-12-02
Abstract
No abstract record available.
Inventors
- 👤 Donald J Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:40
CPC Classifications
F; F02; F02K; F02K3/00; F02K3/08; F02K3/10; F02C; F02C3/00; F02C3/20; F02C3/30; F02C3/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23198E
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US2078957A
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US2464724A
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US2520434A
Cited
GB628366A
Cited
US2520967A
Cited
US2569497A
Cited
US2673445A
Cited
US2551229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |