Patent US2964596A successfully refreshed from Google Patents.
US2964596A
Expired / Lapsed
US
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Sound-reproducing device
Assignee: Zenith Electronics LLC
•
Filing: 1956-08-01
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Granted: 1960-12-13
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Expires: 1976-08-01
Abstract
No abstract record available.
Inventors
- 👤 Raymond T Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:22
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; H04R25/656
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1601063A
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US2164121A
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US2325590A
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US2363175A
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US2390794A
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DE922889C
Cited
US2820107A
Cited
US2874231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |