Patent US1831734A successfully refreshed from Google Patents.
US1831734A
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US
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Means for sustaining piano notes in chords or octaves
Assignee: Individual
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Filing: 1930-07-15
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Granted: 1931-11-10
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Expires: 1950-07-15
Abstract
No abstract record available.
Inventors
- 👤 Maria A Arostegui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
G; G10; G10C; G10C3/00; G10C3/30; G10C3/12; G10C3/16; G10C3/161; G10C3/22; G10C3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-11-09 | 1935-05-11 | 1935-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-09 | 1939-05-11 | 1939-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-09 | 1943-05-11 | 1943-11-10 | $7700.00 | Window Closed / Lapsed |