US2625401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproducing stylus
Assignee: Individual
•
Filing: 1948-06-23
•
Granted: 1953-01-13
•
Expires: 1968-06-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick Jean Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:27
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46; G11B3/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1168412A
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US1435095A
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US1375750A
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US1444147A
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US1397835A
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US1893796A
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US2444218A
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US2328889A
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US2326424A
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US2426061A
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US2452304A
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US2502661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |