US2014781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Telefunken AG
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Filing: 1935-02-07
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Granted: 1935-09-17
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Expires: 1955-02-07
Abstract
No abstract record available.
Inventors
- 👤 Rothe Horst
- 👤 Rzehulka Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:26
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/44; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003; H01J2893/0033; H01J2893/0034; H01J2893/0036
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 |