US2563047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor control
Assignee: Individual
•
Filing: 1947-06-19
•
Granted: 1951-08-07
•
Expires: 1967-06-19
Abstract
No abstract record available.
Inventors
- 👤 Howard A Kisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:21
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1055533A
Cited
US1291126A
Cited
US1541534A
Cited
US1578833A
Cited
US2037745A
Cited
US2170733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |