Patent US2268670A successfully refreshed from Google Patents.
US2268670A
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Electron discharge device
Assignee: AT&T Inc
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Filing: 1939-12-02
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Granted: 1942-01-06
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Expires: 1959-12-02
Abstract
No abstract record available.
Inventors
- 👤 Victor L Ronci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J21/00; H01J21/02; H01J21/06; H01J21/065; H01J21/20; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0013; H01J2893/0015; H01J2893/003; H01J2893/0033; H01J2893/0037; H01J2893/0038; H01J2893/0039; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-05 | 1945-07-07 | 1946-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-05 | 1949-07-07 | 1950-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-05 | 1953-07-07 | 1954-01-06 | $7700.00 | Window Closed / Lapsed |