US3510564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifying system for wind instruments
Assignee: TONE CONE ELECTRONICS Inc
•
Filing: 1966-08-08
•
Granted: 1970-05-05
•
Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Harry O Wetsell
- 👤 Douglas W Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:56
CPC Classifications
G; G10; G10H; G10H3/00; G10D; G10D7/00; G10D7/06; G10D7/08; G10D9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1249409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |