US2521046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic phonograph
Assignee: Individual
•
Filing: 1945-12-07
•
Granted: 1950-09-05
•
Expires: 1965-12-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Darwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:59
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/22; G11B17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141647A
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US971873A
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US1378647A
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FR529368A
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GB215861A
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DE510949C
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US2058842A
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US1847400A
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DE567789C
Cited
FR735467A
Cited
GB433131A
Cited
GB466769A
Cited
US2156612A
Cited
US2281548A
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US2458496A
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US2331596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |