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US2969018A
Expired / Lapsed
US
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Quadrant homing system
Assignee: TDK Micronas GmbH
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Filing: 1957-05-01
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Granted: 1961-01-24
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Erst
- 👤 George E Bowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:29
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/2253; F41G7/2273; F41G7/2293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060201A
Cited
US2520433A
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US2457393A
Cited
US2418137A
Cited
US2415348A
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US2741181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |