US2825842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam producing and focussing assembly
Assignee: Unisys Corp
•
Filing: 1952-09-12
•
Granted: 1958-03-04
•
Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 David E Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:16
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24; H01J23/00; H01J23/16; H01J23/18; H01J23/20; H01J23/207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2777968A
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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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |