US2672726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducted fan jet aircraft engine
Assignee: Bell Aircraft Corp
•
Filing: 1950-09-19
•
Granted: 1954-03-23
•
Expires: 1970-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wolf
- 👤 Robert J Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/36; F02K; F02K3/00; F02K3/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2504181A
Cited
US2548975A
Cited
CH243957A
Cited
US2464724A
Cited
US2503006A
Cited
US2589548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |