Patent US3051844A successfully refreshed from Google Patents.
US3051844A
Expired / Lapsed
US
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Parametric oscillator circuit with frequency changing means
Assignee: RCA Corp
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Filing: 1958-10-30
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Granted: 1962-08-28
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Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Walter R Beam
- 👤 Sterzer Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:12
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K3/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2751555A
Cited
US2815488A
Cited
GB778883A
Cited
US2948818A
Cited
US2928053A
Cited
US2838687A
Cited
US2957087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |