US3000176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducted fan engine
Assignee: RTX Corp
•
Filing: 1957-04-05
•
Granted: 1961-09-19
•
Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Wesley A Kuhrt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:35
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F02K; F02K7/00; F02K7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2602289A
Cited
US2483045A
Cited
US2620625A
Cited
US2592938A
Cited
GB749009A
Cited
US2762192A
Cited
US2883828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |