US2490679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: RELIABLE RADIO Inc
•
Filing: 1945-03-31
•
Granted: 1949-12-06
•
Expires: 1965-03-31
Abstract
No abstract record available.
Inventors
- 👤 Allen R Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/088; F; F16; F16P; F16P3/00; F16P3/12; F16P3/14; F16P3/147; G08; G08G; G08G1/00; G08G1/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958128A
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US2058668A
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US1962742A
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US1971549A
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US2115322A
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US2041114A
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US2152296A
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US2313917A
Cited
US2333001A
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US2395780A
Cited
US2355395A
Cited
US2386942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |