Patent US2808506A successfully refreshed from Google Patents.
US2808506A
Expired / Lapsed
US
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Tracking mechanism for ganged radio circuits
Assignee: Polarad Electronics Corp
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Filing: 1953-03-24
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Granted: 1957-10-01
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Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 Skwarek Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/28; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/21; Y10T74/2101; Y10T74/2102; Y10T74/2105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |