Patent US2626766A successfully refreshed from Google Patents.
US2626766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor arrangement for singlerotor helicopters
Assignee: Bridgestone Firestone Inc
•
Filing: 1947-09-09
•
Granted: 1953-01-27
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 John E Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:44
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/39
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1919089A
Cited
US1887703A
Cited
US2380580A
Cited
US1955501A
Cited
US1977724A
Cited
US2192139A
Cited
US2108839A
Cited
US2155881A
Cited
US2225525A
Cited
US2356692A
Cited
US2428200A
Cited
US2540473A
Cited
US2546881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |