Patent US2940351A successfully refreshed from Google Patents.
US2940351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape sound reproducing musical instrument
Assignee: Individual
•
Filing: 1953-10-16
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Granted: 1960-06-14
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Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 Harry C Chamberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/03; G10H3/08; G10H3/09; G11; G11B; G11B15/00; G11B15/675; G11B15/68; G11B15/6895; Y; Y10; Y10S; Y10S84/00; Y10S84/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1817704A
Cited
US1998461A
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US2549145A
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US2499573A
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US2544722A
Cited
US2645969A
Cited
US2737840A
Cited
US2667097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |