Patent US2579820A successfully refreshed from Google Patents.
US2579820A
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US
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Ultrahigh-frequency system employing neutralizing probes
Assignee: RCA Corp
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Filing: 1946-03-18
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Granted: 1951-12-25
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Expires: 1966-03-18
Abstract
No abstract record available.
Inventors
- 👤 Cecil E Haller
- 👤 William R Keye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:34
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03F1/00; H03F1/08; H03F1/14; H03F1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2169396A
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US2235414A
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US2297512A
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US2282856A
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US2339223A
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US2400753A
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US2440089A
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US2404261A
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US2523307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |