Patent US3429580A successfully refreshed from Google Patents.
US3429580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record playing mechanism
Assignee: V M Corp
•
Filing: 1966-02-28
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Granted: 1969-02-25
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:06
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2216029A
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US2370875A
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US2586422A
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US2819088A
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DE1108455B
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US2949311A
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US3122370A
Cited
US2958529A
Cited
US2982554A
Cited
US3085806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |