Patent US4485448A successfully refreshed from Google Patents.
Patent US2985844A successfully refreshed from Google Patents.
US2985844A
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Oscillator having stabilized detuned degenerative feedback circuit means
Assignee: Eltro GmbH and Co
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Filing: 1957-12-04
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Granted: 1961-05-23
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Expires: 1977-12-04
Abstract
No abstract record available.
Inventors
- 👤 Wesch Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:11
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1899026A
Cited
US2115858A
Cited
US2382198A
Cited
US2436129A
Cited
US2495177A
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US2662408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |