US2905844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Westinghouse Electric Corp
•
Filing: 1954-06-04
•
Granted: 1959-09-22
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Sternglass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:24
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J29/00; H01J29/02; H01J29/023; H01J43/00; H01J43/04; H01J43/06; H01J43/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2196278A
Cited
US2254616A
Cited
US2254617A
Cited
US2254128A
Cited
US2527981A
Cited
US2739084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |