Patent US2771586A successfully refreshed from Google Patents.
US2771586A
Expired / Lapsed
US
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Noise suppression device
Assignee: TDK Micronas GmbH
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Filing: 1952-05-20
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Granted: 1956-11-20
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Expires: 1972-05-20
Abstract
No abstract record available.
Inventors
- 👤 Toro Michael J Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:04
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1666681A
Cited
US1654123A
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DE738990C
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US2112560A
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US2164541A
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US2163195A
Cited
US2541320A
Cited
US2517819A
Cited
US2575333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |