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Patent US2536474A successfully refreshed from Google Patents.
US2536474A
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Blind flying trainer
Assignee: CLAUDE F KING
•
Filing: 1941-04-16
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Granted: 1951-01-02
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Expires: 1961-04-16
Abstract
No abstract record available.
Inventors
- 👤 Lloyd R Susdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:51
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US794466A
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US2110869A
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US2119083A
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US2171561A
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US2179663A
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US2226726A
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US2239395A
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US2444477A
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US2448555A
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US2312962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |