US2533461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument
Assignee: Individual
•
Filing: 1948-08-28
•
Granted: 1950-12-12
•
Expires: 1968-08-28
Abstract
No abstract record available.
Inventors
- 👤 Graydon F Illsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:22
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
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References Cited (Backward Citations)
US1785915A
Cited
US1817704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |