US2955229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary emission suppression in electron beam tubes
Assignee: General Electric Co
•
Filing: 1956-11-14
•
Granted: 1960-10-04
•
Expires: 1976-11-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Bondley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2233917A
Cited
US2263164A
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US2409608A
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FR934919A
Cited
US2491284A
Cited
US2852715A
Cited
US2754448A
Cited
US2846609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |