US2814231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Changeable chord finder
Assignee: Individual
•
Filing: 1953-06-25
•
Granted: 1957-11-26
•
Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
G; G09; G09B; G09B15/00; G09B15/001; G09B15/004; G09B15/005; G09B15/006; G10; G10G; G10G1/00; G10G1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2001191A
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US2079920A
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US2502300A
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CH252364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |