US2549145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical musical instrument
Assignee: IIT Research Institute
•
Filing: 1944-07-28
•
Granted: 1951-04-17
•
Expires: 1964-07-28
Abstract
No abstract record available.
Inventors
- 👤 Harold A Vagtborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
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)
US1218324A
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US1326955A
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US1665331A
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US1991727A
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US2130251A
Cited
US2178706A
Cited
US2144844A
Cited
DE697975C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |