Patent US2452563A successfully refreshed from Google Patents.
US2456859A
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Electric discharge apparatus
Assignee: General Electric Co
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Filing: 1944-03-29
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Granted: 1948-12-21
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Expires: 1964-03-29
Abstract
No abstract record available.
Inventors
- 👤 John H Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/18; H05B41/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878479A
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US2020731A
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US2112718A
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US2177883A
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US2170457A
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GB528460A
Cited
US2266616A
Cited
GB547805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |