Patent US2604949A successfully refreshed from Google Patents.
US2604949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter control
Assignee: Bridgestone Firestone Inc
•
Filing: 1945-10-04
•
Granted: 1952-07-29
•
Expires: 1965-10-04
Abstract
No abstract record available.
Inventors
- 👤 John E Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:53
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; B64C2027/8218
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1794202A
Cited
US1994488A
Cited
US2130918A
Cited
FR880360A
Cited
US2378617A
Cited
US2385889A
Cited
US2433641A
Cited
US2394513A
Cited
US2491549A
Cited
US2496624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |