US2894167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: TDK Micronas GmbH
•
Filing: 1953-03-30
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Granted: 1959-07-07
•
Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Cyril L Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:31
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J40/00; H01J40/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB115700A
Cited
US1839899A
Cited
US1942501A
Cited
US1965849A
Cited
US1861637A
Cited
US2120916A
Cited
US2290748A
Cited
US2601024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |