US2499314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-bladed tail rotor on common hinge
Assignee: RTX Corp
•
Filing: 1947-09-12
•
Granted: 1950-02-28
•
Expires: 1967-09-12
Abstract
No abstract record available.
Inventors
- 👤 William E Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:36
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/41; B64C27/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1980169A
Cited
US2088413A
Cited
US2421364A
Cited
GB476596A
Cited
US2242457A
Cited
US2382460A
Cited
US2368698A
Cited
US2369048A
Cited
US2430767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |