US2681591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera sound adapter device
Assignee: Individual
•
Filing: 1949-11-17
•
Granted: 1954-06-22
•
Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 Stephen H Nyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985552A
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US1843972A
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US1845236A
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US1991472A
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US1866712A
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US1930913A
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US1891277A
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US2008881A
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US1957525A
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US2119136A
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US2322144A
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US2347325A
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US2485839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |