US2719243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic electron lens
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1951-07-03
•
Granted: 1955-09-27
•
Expires: 1971-07-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Hoagland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:19
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2070319A
Cited
US2058914A
Cited
US2152825A
Cited
US2123011A
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US2191415A
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US2163210A
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US2211613A
Cited
US2248558A
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US2389903A
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US2363359A
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US2277414A
Cited
US2484721A
Cited
US2454345A
Cited
US2452919A
Cited
US2452893A
Cited
US2555850A
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US2596508A
Cited
US2617060A
Cited
US2562243A
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US2562242A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |