US2707753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Westinghouse Electric Corp
•
Filing: 1951-03-28
•
Granted: 1955-05-03
•
Expires: 1971-03-28
Abstract
No abstract record available.
Inventors
- 👤 Marshall Donald Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:07
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54; H01J17/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174676A
Cited
US1617180A
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US1990728A
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US1987338A
Cited
US2225645A
Cited
US2366349A
Cited
US2468221A
Cited
US2504224A
Cited
US2489937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |