US2575890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic approach control system
Assignee: Bendix Aviation Corp
•
Filing: 1947-10-17
•
Granted: 1951-11-20
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Expires: 1967-10-17
Abstract
No abstract record available.
Inventors
- 👤 Sr Corles Melvin Perkins
- 👤 Bennett Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958258A
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US1999047A
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US2372185A
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US2247294A
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FR888812A
Cited
US2423337A
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US2419970A
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US2484819A
Cited
US2484862A
Cited
US2482809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |