US2497142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recorder and reproducer
Assignee: Individual
•
Filing: 1941-12-18
•
Granted: 1950-02-14
•
Expires: 1961-12-18
Abstract
No abstract record available.
Inventors
- 👤 Shepherd Judson O'd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:17
CPC Classifications
G; G11; G11B; G11B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1681376A
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GB276708A
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FR633624A
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US1802747A
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US1917003A
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US1918848A
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GB384258A
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US1946596A
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US2086130A
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US2213250A
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US2215468A
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US2188687A
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US2256093A
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US2220488A
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US2263316A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |