US2657308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal receiver circuit
Assignee: STC PLC
•
Filing: 1950-07-29
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Granted: 1953-10-27
•
Expires: 1970-07-29
Abstract
No abstract record available.
Inventors
- 👤 Brandt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/442; H04Q1/4423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2068293A
Cited
US2061011A
Cited
US2137401A
Cited
US2164939A
Cited
US2287926A
Cited
US2275930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |