US2445257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic emitting device
Assignee: General Electric X Ray Corp
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Filing: 1944-07-03
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Granted: 1948-07-13
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Expires: 1964-07-03
Abstract
No abstract record available.
Inventors
- 👤 Zed J Atlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:39
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |