Patent US2426241A successfully refreshed from Google Patents.
US2426241A
Expired / Lapsed
US
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Phonograph recording and reproducing system
Assignee: Columbia Records Inc
•
Filing: 1943-02-11
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Granted: 1947-08-26
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Expires: 1963-02-11
Abstract
No abstract record available.
Inventors
- 👤 Isaae P Rodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2031074A
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US1998105A
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US2192757A
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US2141804A
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US2192360A
Cited
US2328628A
Cited
US2352778A
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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) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |