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US3429376A
Expired / Lapsed
US
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Automatic control system for aircraft lifting rotor
Assignee: KURT H HOHENEMSER
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Filing: 1966-10-18
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Granted: 1969-02-25
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Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Kurt H Hohenemser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:26
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64C27/56; B64C27/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE503406A
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CA487128A
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US2605093A
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GB868199A
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US3037722A
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US3008670A
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US3099421A
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US3175786A
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US3369778A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |