US3530224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foot controlled continuously variable preference circuit for musical instruments
Assignee: Thomas International Corp
•
Filing: 1967-02-24
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Granted: 1970-09-22
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Bradley J Plunkett
- 👤 Lester L Kushner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:26
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/053; G10H1/055; G10H1/06; G10H1/14; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/186; Y; Y10; Y10S; Y10S84/00; Y10S84/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |