Patent US2498072A successfully refreshed from Google Patents.
US2498072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade seal for propeller spinners
Assignee: Curtiss Wright Corp
•
Filing: 1945-08-24
•
Granted: 1950-02-21
•
Expires: 1965-08-24
Abstract
No abstract record available.
Inventors
- 👤 George A Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2440115A
Cited
US2083992A
Cited
GB518873A
Cited
US2210190A
Cited
US2289400A
Cited
US2329606A
Cited
FR882261A
Cited
US2402114A
Cited
US2421841A
Cited
US2440394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |