US2821705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for a beacon transpondor
Assignee: Individual
•
Filing: 1946-02-27
•
Granted: 1958-01-28
•
Expires: 1966-02-27
Abstract
No abstract record available.
Inventors
- 👤 George P Wachtell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:10
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1894019A
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US2132599A
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US2321698A
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US2403600A
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US2403429A
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US2419541A
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US2460202A
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US2416223A
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US2420211A
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US2427191A
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US2531393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |