US2941603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor blade
Assignee: Individual
•
Filing: 1956-05-01
•
Granted: 1960-06-21
•
Expires: 1976-05-01
Abstract
No abstract record available.
Inventors
- 👤 Drago K Jovanovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:14
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB361799A
Cited
US2111975A
Cited
US2293801A
Cited
DE720091C
Cited
US2593714A
Cited
US2430854A
Cited
GB623322A
Cited
US2574651A
Cited
US2644537A
Cited
US2674327A
Cited
GB644900A
Cited
US2568230A
Cited
US2630868A
Cited
US2754915A
Cited
GB724758A
Cited
US2693922A
Cited
FR1113837A
Cited
FR1113002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |