Patent US2579758A successfully refreshed from Google Patents.
Patent US3530225A successfully refreshed from Google Patents.
US3530225A
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US
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Derivative synthesis of musical instrument tones by means of nonlinear transfer function device
Assignee: Wurlitzer Co
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Filing: 1966-09-06
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Granted: 1970-09-22
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Eric Gschwandtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:42
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2514490A
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US2506723A
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US2959693A
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US2931877A
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US3213181A
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US3229020A
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US3388257A
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US3333041A
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US3358069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |