US2949965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor hub
Assignee: Bell Helicopter Textron Inc
•
Filing: 1957-10-15
•
Granted: 1960-08-23
•
Expires: 1977-10-15
Abstract
No abstract record available.
Inventors
- 👤 Tore John A De
- 👤 Robert L Lichten
- 👤 Arthur C Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/35; B64C27/37; B64C27/41
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2633924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |