Patent US2926309A successfully refreshed from Google Patents.
US2926309A
Expired / Lapsed
US
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Screen grid amplifier
Assignee: TDK Micronas GmbH
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Filing: 1955-10-04
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Granted: 1960-02-23
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Expires: 1975-10-04
Abstract
No abstract record available.
Inventors
- 👤 Bevitt J Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:52
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2102779A
Cited
US2138891A
Cited
US2122850A
Cited
US2123241A
Cited
US2243442A
Cited
US2412485A
Cited
US2536830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |