Patent US3315110A successfully refreshed from Google Patents.
US3315110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped-field hollow beam electron gun having high beam perveance and high beam convergence ratio
Assignee: Unisys Corp
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Filing: 1963-08-12
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Granted: 1967-04-18
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Wang Chao Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:08
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J23/06; H01J23/075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
AN ELECTRON GUN FOR PRODUCING A HOLLOW ELECTRON BEAM DIRECTED ALONG A LONGITUDINAL AXIS, SAID APPARATUS COMPRISING, MEANS FOR PROVIDING AN ELECTRON BEAM MAGNETIC FOCUSING FIELD THAT IS CHARACTERIZED BY HAVING A PATTERN OF FLUX LINES THAT ARE SUBSTANTIALLY PARALLEL AND AXIALLY DIRECTED IN THE CENTRAL REGION OF SAID FIELD AND RADIALLY DIVERGING WITH A NONLINEAR FLARE AT AN END REGION OF SAID FIELD, AN ELECTRON EMITTING SURFACE SYMMETRICALLY DISPOSED ABOUT SAID AXIS IN SAID END REGION OF THE FOCUSING FIELD WHERE THE FLUX LINES DIVERGE RADIALLY,
Claim 2
Dependent Claim
87 words
AN ELECTRON GUN FOR PRODUCING A HOLLOW ELECTRON BEAM DIRECTED ALONG A LONGITUDINAL AXIS, SAID APPARATUS COMPRISING, MEANS FOR PROVIDING AN ELECTRON BEAM MAGNETIC FOCUSING FIELD THAT IS CHARACTERIZED BY HAVING A PATTERN OF FLUX LINES THAT ARE SUBSTANTIALLY PARALLEL AND AXIALLY DIRECTED IN THE CENTRAL REGION OF SAID FIELD AND RADIALLY DIVERGING WITH A NONLINEAR FLARE AT AN END REGION OF SAID FIELD, AN ELECTRON EMITTING SURFACE SYMMETRICALLY DISPOSED ABOUT SAID AXIS IN SAID END REGION OF THE FOCUSING FIELD WHERE THE FLUX LINES DIVERGE RADIALLY,
References Cited (Backward Citations)
US2306875A
Cited
US2812467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |