US2907912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: General Electric Co
•
Filing: 1955-04-29
•
Granted: 1959-10-06
•
Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Joe F Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/50; H01J19/52; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1558883A
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US2057115A
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US2030930A
Cited
US2087327A
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US2077814A
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US2760100A
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US2664519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |