US2964986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push button chord derivation and apparatus
Assignee: BALDWIN PIANO Co
•
Filing: 1956-05-10
•
Granted: 1960-12-20
•
Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Philip C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/38; G10H1/32; G10H1/34; H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/40; H01H1/403; Y; Y10; Y10S; Y10S84/00; Y10S84/15; Y10S84/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |