US2728256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key pad for wind musical instruments
Assignee: Individual
•
Filing: 1953-01-21
•
Granted: 1955-12-27
•
Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert E Melcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
G; G10; G10D; G10D9/00; G10D9/04; G10D9/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1401872A
Cited
US1816578A
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US1702962A
Cited
US1673717A
Cited
US1747113A
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US2534660A
Cited
GB685768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |