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Patent US2652543A successfully refreshed from Google Patents.
US2652543A
Expired / Lapsed
US
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Electromechanical filter
Assignee: Motorola Solutions Inc
•
Filing: 1949-06-16
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Granted: 1953-09-15
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Expires: 1969-06-16
Abstract
No abstract record available.
Inventors
- 👤 Myron L Anthony
- 👤 Robert M Virkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:42
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50; H03H9/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1666681A
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US1654123A
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US1784830A
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US1938620A
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US1997599A
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US2091250A
Cited
US2283924A
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US2501488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |