Patent US3258626A successfully refreshed from Google Patents.
US3258626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow beam electron gun
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:40
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/06; H01J23/075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN ELECTRON GUN COMPRISING A CATHODE HAVING AN ELONGATED ELECTRON-EMISSIVE SURFACE, A BELL-SHAPED ANODE MEANS DISPOSED AXIALLY COEXTENSIVE WITH SAID SURFACE, SAID BELL-SHAPED ANODE MEANS PROVIDING BELL-SHAPED TUBULAR EQUIPOTENTIAL SURFACES BETWEEN THE ANODE AND CATHODE, SAID BELL-SHAPED TUBULAR EQUIPOTENTIAL SURFACES HAVING A NON-LINEAR VARIATION IN DIAMETER ALONG THE GUN AXIS, AND MEANS ESTABLISHING A BEAM CONFINING MAGNETIC FIELD DISPOSED AT AN ENGLE WITH SAID CATHODE SURFACE AND THREADUBG THROUGH SAID SURFACE.
Claim 2
Dependent Claim
71 words
AN ELECTRON GUN COMPRISING A CATHODE HAVING AN ELONGATED ELECTRON-EMISSIVE SURFACE, A BELL-SHAPED ANODE MEANS DISPOSED AXIALLY COEXTENSIVE WITH SAID SURFACE, SAID BELL-SHAPED ANODE MEANS PROVIDING BELL-SHAPED TUBULAR EQUIPOTENTIAL SURFACES BETWEEN THE ANODE AND CATHODE, SAID BELL-SHAPED TUBULAR EQUIPOTENTIAL SURFACES HAVING A NON-LINEAR VARIATION IN DIAMETER ALONG THE GUN AXIS, AND MEANS ESTABLISHING A BEAM CONFINING MAGNETIC FIELD DISPOSED AT AN ENGLE WITH SAID CATHODE SURFACE AND THREADUBG THROUGH SAID SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |