US3520498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of aircraft rotors having cyclic pitch
Assignee: Bell Aerospace Corp
•
Filing: 1967-12-20
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Granted: 1970-07-14
•
Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 Milford R Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:52
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3010679A
Cited
US3050276A
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US3120276A
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US3118504A
Cited
US3100610A
Cited
GB1081341A
Cited
US3429376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |