US2523307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback coupling circuit
Assignee: STC PLC
•
Filing: 1944-10-28
•
Granted: 1950-09-26
•
Expires: 1964-10-28
Abstract
No abstract record available.
Inventors
- 👤 Armig G Kandoian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835; H03F; H03F3/00; H03F3/50; H03F3/52; H03F3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2375223A
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US2284751A
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US2362209A
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US2373233A
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US2284405A
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US2426185A
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US2362470A
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US2440089A
Cited
US2403561A
Cited
US2367693A
Cited
US2423085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |