US3520984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard actuated rhythm accompaniment
Assignee: Wurlitzer Co
•
Filing: 1967-05-18
•
Granted: 1970-07-21
•
Expires: 1987-05-18
Abstract
No abstract record available.
Inventors
- 👤 William V Machanian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:10
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/40; G10H1/42; G10H2230/00; G10H2230/045; G10H2230/251; G10H2230/321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2783672A
Cited
GB951169A
Cited
US3297812A
Cited
US3291886A
Cited
US3389211A
Cited
US3340344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |