US2956171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit
Assignee: BALDWIN PIANO Co
•
Filing: 1957-04-22
•
Granted: 1960-10-11
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Clayton F Winder
- 👤 Edward M Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:51
CPC Classifications
H; H10; H10D; H10D99/00; H03; H03M; H03M1/00; H03M1/12; H03M1/34; H03M1/38; H03M1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803815A
Cited
US2714702A
Cited
US2745956A
Cited
US2779897A
Cited
US2789254A
Cited
US2768310A
Cited
US2836766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |