Patent US2419903A successfully refreshed from Google Patents.
US2419903A
Expired / Lapsed
US
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Electrode construction for highfrequency electronic devices
Assignee: GTE Sylvania Inc
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Filing: 1944-05-24
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Granted: 1947-04-29
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Expires: 1964-05-24
Abstract
No abstract record available.
Inventors
- 👤 Henry J Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J2893/00; H01J2893/0001; H01J2893/0012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628045A
Cited
US1760525A
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US1754012A
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US1731945A
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US1850585A
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US1803976A
Cited
US2156016A
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US2156029A
Cited
US2283895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |