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Patent US3494238A successfully refreshed from Google Patents.
US3494238A
Expired / Lapsed
US
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Stringed instrument with pre-programmed instantaneous selection of multiple chromatic changes
Assignee: DARELL A CRITES
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Filing: 1968-02-08
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Granted: 1970-02-10
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Expires: 1988-02-08
Abstract
No abstract record available.
Inventors
- 👤 Darell A Crites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:07
CPC Classifications
G; G10; G10D; G10D1/00; G10D1/04; G10D3/00; G10D3/14; G10D3/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US485354A
Cited
US2812681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |