Patent EP0455509A1 successfully refreshed from Google Patents.
US2807183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable device for teaching music
Assignee: Individual
•
Filing: 1954-10-01
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Granted: 1957-09-24
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Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Theresa Q Ney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:00
CPC Classifications
G; G09; G09B; G09B15/00; G09B15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806964A
Cited
US1295025A
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US1526547A
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US1527824A
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US1833204A
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US1816865A
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US1841310A
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US2221143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |