US2654003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator-amplifier circuits for magnetic recording and reproducing systems
Assignee: Int Electronics Co
•
Filing: 1947-11-24
•
Granted: 1953-09-29
•
Expires: 1967-11-24
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Dashiell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:38
CPC Classifications
G; G11; G11B; G11B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121434A
Cited
US2351005A
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US2439844A
Cited
US2414795A
Cited
US2535486A
Cited
US2540299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |