Patent US2920291A successfully refreshed from Google Patents.
US2920291A
Expired / Lapsed
US
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Signal transmission systems
Assignee: TDK Micronas GmbH
•
Filing: 1956-03-06
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Granted: 1960-01-05
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 John H Brundage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:58
CPC Classifications
H; H03; H03G; H03G7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR829363A
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US2328951A
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US2358045A
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US2438948A
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US2548913A
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US2559023A
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US2697201A
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FR1047892A
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US2768352A
Cited
US2682640A
Cited
US2820949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |