Patent US2411501A successfully refreshed from Google Patents.
US2411501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recording system
Assignee: MEMOVOX Inc
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Filing: 1944-05-16
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Granted: 1946-11-26
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Expires: 1964-05-16
Abstract
No abstract record available.
Inventors
- 👤 George P Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:10
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-11-25 | 1950-05-27 | 1950-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-11-25 | 1954-05-27 | 1954-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-11-25 | 1958-05-27 | 1958-11-26 | $7700.00 | Window Closed / Lapsed |