US2595345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller feathering control
Assignee: Glenn L Martin Co
•
Filing: 1947-06-24
•
Granted: 1952-05-06
•
Expires: 1967-06-24
Abstract
No abstract record available.
Inventors
- 👤 Richard A Engelhardt
- 👤 Wilfred L Kershaw
- 👤 Robert W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:52
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/305
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |