Patent US2452893A successfully refreshed from Google Patents.
US2452893A
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Electron lens assembly
Assignee: General Electric Co
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Filing: 1946-05-31
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Granted: 1948-11-02
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Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Charles H Bachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:18
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/487; H01J37/00; H01J37/02; H01J37/04; H01J37/10; H01J37/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170663A
Cited
US2184821A
Cited
US2185807A
Cited
US2330930A
Cited
US2347965A
Cited
US2400332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |