US2205502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge tube
Assignee: RCA Corp
•
Filing: 1939-02-17
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Granted: 1940-06-25
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Expires: 1959-02-17
Abstract
No abstract record available.
Inventors
- 👤 Theodor Philibert Tromp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J19/00; H01J19/02; H01J19/42; H01J5/50; H01R; H01R33/00; H01R33/74; H01R33/76; H01R33/7678; H01J2893/00; H01J2893/0001; H01J2893/0002
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) | 1943-06-25 | 1943-12-25 | 1944-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-25 | 1947-12-25 | 1948-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-25 | 1951-12-25 | 1952-06-25 | $7700.00 | Window Closed / Lapsed |