US2976457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron lens
Assignee: RCA Corp
•
Filing: 1953-11-02
•
Granted: 1961-03-21
•
Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 John H Reisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/56; H01J29/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2119795A
Cited
US2354287A
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US2443107A
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FR936762A
Cited
US2455676A
Cited
US2547994A
Cited
US2486856A
Cited
US2580675A
Cited
US2555850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |