Patent US2494566A successfully refreshed from Google Patents.
US2494566A
Expired / Lapsed
US
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Apparatus for producing artificial radio direction signals
Assignee: Individual
•
Filing: 1943-04-03
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Granted: 1950-01-17
•
Expires: 1963-04-03
Abstract
No abstract record available.
Inventors
- 👤 Garrett B Linderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:36
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/24; G09B9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165236A
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US2099857A
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US2227147A
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US2199066A
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US2240800A
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US2243600A
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US2312962A
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US2450503A
Cited
US2326764A
Cited
US2366603A
Cited
US2451927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |