Patent US2930006A successfully refreshed from Google Patents.
US2930006A
Expired / Lapsed
US
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Mechanical filter with impedance matching discs
Assignee: Collins Radio Co
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Filing: 1954-06-16
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Granted: 1960-03-22
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Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 James C Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:22
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/135; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2662217A
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US2617882A
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US2693579A
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US2656516A
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US2762985A
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US2774042A
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US2777999A
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US2802992A
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US2821686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |