US2646502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise limiting circuit
Assignee: United States, WAR, Secretary of
•
Filing: 1945-08-30
•
Granted: 1953-07-21
•
Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Persa R Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; H04; H04N; H04N5/00; H04N5/14; H04N5/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1483172A
Cited
US1915926A
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US2227197A
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US2161764A
Cited
US2179277A
Cited
US2247324A
Cited
US2424349A
Cited
US2481515A
Cited
US2410736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |