Patent US2929668A successfully refreshed from Google Patents.
US2929668A
Expired / Lapsed
US
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Electron discharge device
Assignee: Westinghouse Electric Corp
•
Filing: 1956-10-31
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Granted: 1960-03-22
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Expires: 1976-10-31
Abstract
No abstract record available.
Inventors
- 👤 Carl F Miller
- 👤 William H Mccurdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:48
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/14; H05K1/142; H01; H01J; H01J19/00; H01J19/42; H01J19/46; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0006; H05K1/144; H05K2201/00; H05K2201/10; H05K2201/10227; H05K2201/10287; H05K2201/10295; H05K2201/10303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2074864A
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US2268670A
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US2305901A
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US2417061A
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US2515706A
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US2568460A
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US2543093A
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US2731578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |