US3020534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical encoder
Assignee: BALDWIN PIANO Co
•
Filing: 1958-04-10
•
Granted: 1962-02-06
•
Expires: 1978-04-10
Abstract
No abstract record available.
Inventors
- 👤 Edward M Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/30; H03M1/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2679644A
Cited
US2685054A
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US2755020A
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US2830191A
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US2677815A
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US2793807A
Cited
US2754502A
Cited
US2910684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |