Patent US2140005A successfully refreshed from Google Patents.
US2489850A
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Support for the electrodes of electron discharge devices
Assignee: Individual
•
Filing: 1948-03-09
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Granted: 1949-11-29
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Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 George W Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/50; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194281A
Cited
US1550768A
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US2093567A
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US2078371A
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US2094654A
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US2178836A
Cited
US2116224A
Cited
US2178837A
Cited
US2380496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |