Patent US2490768A successfully refreshed from Google Patents.
US2490768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio remote-control system
Assignee: Individual
•
Filing: 1946-04-26
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Granted: 1949-12-13
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Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 James M Althouse
- 👤 Margaret A Mcadams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:55
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1597416A
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US2245347A
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US2397475A
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US2397477A
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US2393892A
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US2325829A
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US2396091A
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US2282102A
Cited
US2414103A
Cited
US2397088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |