Patent US2491244A successfully refreshed from Google Patents.
US2491244A
Expired / Lapsed
US
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Signal receiving and transmitting apparatus
Assignee: Individual
•
Filing: 1946-04-27
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Granted: 1949-12-13
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Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Harry W Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:58
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2020297A
Cited
US2176868A
Cited
US2190546A
Cited
US2288487A
Cited
US2346504A
Cited
US2389949A
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 |