US2431350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piano
Assignee: PRATT READ AND CO Inc
•
Filing: 1944-04-10
•
Granted: 1947-11-25
•
Expires: 1964-04-10
Abstract
No abstract record available.
Inventors
- 👤 Stein Charles Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
G; G10; G10C; G10C1/00; G10C1/02; G10C3/00; G10C3/02; G10C3/04; G10C3/06; G10C3/12; G10C3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US331187A
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US757712A
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US1090487A
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US1166964A
Cited
US1084088A
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US1233682A
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US1490678A
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US1642356A
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US1731158A
Cited
US1752234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |