Patent GB543291A successfully refreshed from Google Patents.
US2751493A
Expired / Lapsed
US
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Noise squelch system
Assignee: Bendix Aviation Corp
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Filing: 1953-10-22
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Granted: 1956-06-19
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Expires: 1973-10-22
Abstract
No abstract record available.
Inventors
- 👤 Atwood H Hargrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:43
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03G3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2409139A
Cited
US2455450A
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US2531433A
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US2586190A
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US2527617A
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US2589711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |