Patent US2802054A successfully refreshed from Google Patents.
US2802054A
Expired / Lapsed
US
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Sound reproducing apparatus
Assignee: Ferguson Radio Corp Ltd
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Filing: 1953-07-30
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Granted: 1957-08-06
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Expires: 1973-07-30
Abstract
No abstract record available.
Inventors
- 👤 Corney John Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:53
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/22; H04; H04R; H04R3/00; H04R3/04; H04R3/08
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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |