Patent US4825420A successfully refreshed from Google Patents.
US2774918A
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US
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Electric discharge device
Assignee: General Electric Co
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Filing: 1951-10-06
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Granted: 1956-12-18
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Expires: 1971-10-06
Abstract
No abstract record available.
Inventors
- 👤 Lemmers Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0672; H01J61/54; H01J61/547
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB434276A
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US2010879A
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US2249672A
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US2306925A
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US2362510A
Cited
US2408822A
Cited
US2462336A
Cited
US2504549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |