Patent US3214632A successfully refreshed from Google Patents.
US3214632A
Expired / Lapsed
US
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Low noise electron gun
Assignee: General Electric Co
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Filing: 1963-07-22
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Granted: 1965-10-26
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Ward A Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:05
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/06; H01J23/075
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A LOW NOISE ELECTRON GUN FOR PROJECTING A BEAM OF ELECTRONS IN A FORWARD DIRECTION ALONG A PREDETERMINED PATH COMPRISING: A CATHODE HAVING AT LEAST A PORTION THEREOF TAPERED IN THE DIRECTION OF SAID PATH, SAID CATHODE HAVING AN EMISSIVE SURFACE COMPRISING AT LEAST A PART OF SAID TAPERED PORTION, A PORTION OF SAID CATHODE EXTENDING BEYOND SAID EMISSIVE SURFACE IN SAID FORWARD DIRECTION; MEANS FOR PROVIDING A MAGNETIC FIELD ABOUT SAID CATHODE IN THE DIRECTION OF SAID PATH; AN ANODE SURROUNDING A PORTION OF SAID CATHODE, THE FORWARD EDGE OF SAID ANODE BEING SUBSTANTIALLY ALIGNED WITH THE FORWARD EDGE OF SAID EMISSIVE SURFACE; MEANS FOR ESTABLISHING A POTENTIAL DIFFERENCE BETWEEN SAID ANODE AND SAID CATHODE FOR EXTRACTING ELECTRONS FROM SAID EMISSIVE SURFACE; AND AT LEAST ONE ACCELERATING ELECTRODE POSITIONED ALONG SAID PATH FORWARD OF SAID ANODE FOR ACCELERATING SAID ELECTRONS ALONG SAID PATH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |