US2014809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge tube
Assignee: Telefunken AG
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Filing: 1934-09-29
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Granted: 1935-09-17
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Expires: 1954-09-29
Abstract
No abstract record available.
Inventors
- 👤 Kuhle Wilhelm Eberhard
- 👤 Prinz Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:13
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J19/42; H01J19/50; H01J5/00; H01J5/32; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/40; C04B2237/50; C04B2237/84; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003; H01J2893/0005; H01J2893/0008
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) | 1938-09-16 | 1939-03-18 | 1939-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-16 | 1943-03-18 | 1943-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-16 | 1947-03-18 | 1947-09-17 | $7700.00 | Window Closed / Lapsed |