US2715707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic motor control for varying propeller pitch
Assignee: FLIGHT RES Inc
•
Filing: 1950-12-20
•
Granted: 1955-08-16
•
Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 Haskins Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:56
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1999646A
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US2154500A
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US2216472A
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US2334967A
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US2357055A
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US2319406A
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US2386294A
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US2440083A
Cited
US2361973A
Cited
US2365601A
Cited
GB587055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |