US2737840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Musical instrument employing tape recording
Assignee: General Dynamics Corp
•
Filing: 1951-11-23
•
Granted: 1956-03-13
•
Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Gratian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
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)
US727514A
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US973391A
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US1742057A
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GB381210A
Cited
US2178706A
Cited
US2142391A
Cited
US2549145A
Cited
US2645969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |