Patent US2500947A successfully refreshed from Google Patents.
US2500947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorded tone musical instrument and method of producing records therefor
Assignee: HAROLD A JEWETT
•
Filing: 1947-09-16
•
Granted: 1950-03-21
•
Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Nelson J Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/03; G10H3/08; G10H3/09; Y; Y10; Y10S; Y10S84/00; Y10S84/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |