US2569882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control and support connection for helicopter rotor systems
Assignee: HELIEOPTER Corp OF AMERICA
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Filing: 1946-06-29
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Granted: 1951-10-02
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Expires: 1966-06-29
Abstract
No abstract record available.
Inventors
- 👤 Washburn Watson
- 👤 Bothezat Julia R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/52; B64C27/001; B64C2027/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |