Patent US2470148A successfully refreshed from Google Patents.
US2470148A
Expired / Lapsed
US
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Keyboard for musical instruments
Assignee: RCA Corp
•
Filing: 1944-09-28
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Granted: 1949-05-17
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Expires: 1964-09-28
Abstract
No abstract record available.
Inventors
- 👤 Galan W Demuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
G; G10; G10B; G10B1/00; G10B1/02; G10B1/04; G10C; G10C3/00; G10C3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US17320A
Cited
US43389A
Cited
US1319188A
Cited
US1200336A
Cited
US1663146A
Cited
US2117002A
Cited
US2184424A
Cited
US2260412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |