US2640916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement for combined radio receiving and transmitting systems
Assignee: The General Electric Company PLC
•
Filing: 1949-07-13
•
Granted: 1953-06-02
•
Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 Espley Dennis Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:17
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2133; H01P1/201; H01P1/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401717A
Cited
US2412315A
Cited
US2425379A
Cited
US2485606A
Cited
US2495589A
Cited
US2512673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |