Patent US2450210A successfully refreshed from Google Patents.
US2450210A
Expired / Lapsed
US
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String depressor for stringed musical instruments
Assignee: Individual
•
Filing: 1946-03-16
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Granted: 1948-09-28
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Expires: 1966-03-16
Abstract
No abstract record available.
Inventors
- 👤 Howard L Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:57
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/06; G10D3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1374388A
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US1437026A
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US1635542A
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US1519881A
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US1852853A
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US2132281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |