US2459792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam type electron discharge device
Assignee: STC PLC
•
Filing: 1944-07-08
•
Granted: 1949-01-25
•
Expires: 1964-07-08
Abstract
No abstract record available.
Inventors
- 👤 Chevigny Paul Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:00
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 0
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US2268195A
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US2252565A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |