US3018443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parameric amplifier with lower frequency pumping
Assignee: RCA Corp
•
Filing: 1958-05-20
•
Granted: 1962-01-23
•
Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 Bloom Stanley
- 👤 Kern K N Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1884844A
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US1884845A
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US2719223A
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US2743322A
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US2806138A
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US2825765A
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US2815488A
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US2897452A
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US2909654A
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US2868980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |