US2744208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion trap electron gun
Assignee: RCA Corp
•
Filing: 1949-12-02
•
Granted: 1956-05-01
•
Expires: 1969-12-02
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Swedlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/84; H01J29/845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2181850A
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US2211614A
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US2274586A
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US2472766A
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US2460609A
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US2456474A
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US2496127A
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US2604599A
Cited
US2580355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |