US2623601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller blade preloading and fluid transfer mechanism
Assignee: RTX Corp
•
Filing: 1950-03-14
•
Granted: 1952-12-30
•
Expires: 1970-03-14
Abstract
No abstract record available.
Inventors
- 👤 Earl M Frankland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:41
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49707
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE727968C
Cited
GB486614A
Cited
US2470560A
Cited
US2533415A
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US2425261A
Cited
US2462932A
Cited
US2530520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |