US2786941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating circuit for audio frequency generators
Assignee: Matth Hohner AG
•
Filing: 1953-01-23
•
Granted: 1957-03-26
•
Expires: 1973-01-23
Abstract
No abstract record available.
Inventors
- 👤 Bierl Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US354274A
Cited
US1559802A
Cited
US1957392A
Cited
US1831886A
Cited
US2354331A
Cited
US2594749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |