Patent US2479549A successfully refreshed from Google Patents.
US2479549A
Expired / Lapsed
US
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Automatic pilot for helicopters
Assignee: Unisys Corp
•
Filing: 1943-11-10
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Granted: 1949-08-23
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Expires: 1963-11-10
Abstract
No abstract record available.
Inventors
- 👤 Waldemar A Ayres
- 👤 Mortimer F Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0858; G01; G01C; G01C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1896805A
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US1993701A
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US1918082A
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US2023105A
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US1997412A
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US2112965A
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US2045579A
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US2143140A
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US2190390A
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US2119250A
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US2350126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |