US2544450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for hollow propeller blade tips
Assignee: Curtiss Wright Corp
•
Filing: 1946-05-09
•
Granted: 1951-03-06
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Louis H Enos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:20
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24; Y; Y10; Y10S; Y10S220/00; Y10S220/19; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1996850A
Cited
US2152861A
Cited
GB541759A
Cited
US2340133A
Cited
US2412908A
Cited
US2435604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |