US3004460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio modulation system
Assignee: BALDWIN PIANO Co
•
Filing: 1956-12-31
•
Granted: 1961-10-17
•
Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:54
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H1/08; G10H1/10; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12306; Y10T428/12313; Y10T428/12347; Y10T428/12382; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12653; Y10T428/1266; Y10T428/12667
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |