Patent US3381450A successfully refreshed from Google Patents.
Patent US3174043A successfully refreshed from Google Patents.
US3174043A
Expired / Lapsed
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Short pulse-high intensity vacuum arc x-ray system
Assignee: Field Emission Corp
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Filing: 1961-06-01
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Granted: 1965-03-16
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Expires: 1981-06-01
Abstract
No abstract record available.
Inventors
- 👤 Walter P Dyke
- 👤 Frank J Grundhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:50
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN X-RAY PULSE GENERATOR, COMPRISING: AN AVACUATED ENVELOPE; AN ANODE SUPPORTED IN SAID ENVELOPE; FIELD EMISSION CATHODE MEANS SUPPORTED WITHIN SAID ENVELOPE FOR BOMBARDING SAID ANODE WITH ELECTRONS TO PRODUCE X-RAYS, SAID CATHODE MEANS INCLUDING A PLURALITY OF SPACED CATHODE ELEMENTS OF METAL EACH HAVING A SHARP PORTION WITH A SMALL RADIUS OF CURVATURE TO ENABLE THE FIELD EMISSION OF ELECTRONS FROM SAID SHARP PORTIONS; MEANS FOR SUPPORTING THE CATHODE ELEMENTS SO THAT THE SHARP PORTIONS OF SAID ELEMENTS ARE SPACED SUBSTANTIALLY THE SAME DISTANCE FROM SAID ANODE; AND MEANS FOR APPLYING A NARROW, SHORT RISE TIME ELECTRICAL PULSE OF HIGH VOLTAGE AND HIGH CURRENT BETWEEN SAID ANODE AND SAID CATHODE ELEMENTS TO CAUSE SAID FIELD EMISSION BY AT LEAST ONE OF SAID ELEMENTS AND TO CAUSE A VACUUM ARC TO BE PRODUCED BETWEEN SAID ONE ELEMENT AND SAID ANODE TO GENERATE A SHORT X-RAY PULSE OF HIGH INTENSITY.
Claim 2
Dependent Claim
149 words
AN X-RAY PULSE GENERATOR, COMPRISING: AN AVACUATED ENVELOPE; AN ANODE SUPPORTED IN SAID ENVELOPE; FIELD EMISSION CATHODE MEANS SUPPORTED WITHIN SAID ENVELOPE FOR BOMBARDING SAID ANODE WITH ELECTRONS TO PRODUCE X-RAYS, SAID CATHODE MEANS INCLUDING A PLURALITY OF SPACED CATHODE ELEMENTS OF METAL EACH HAVING A SHARP PORTION WITH A SMALL RADIUS OF CURVATURE TO ENABLE THE FIELD EMISSION OF ELECTRONS FROM SAID SHARP PORTIONS; MEANS FOR SUPPORTING THE CATHODE ELEMENTS SO THAT THE SHARP PORTIONS OF SAID ELEMENTS ARE SPACED SUBSTANTIALLY THE SAME DISTANCE FROM SAID ANODE; AND MEANS FOR APPLYING A NARROW, SHORT RISE TIME ELECTRICAL PULSE OF HIGH VOLTAGE AND HIGH CURRENT BETWEEN SAID ANODE AND SAID CATHODE ELEMENTS TO CAUSE SAID FIELD EMISSION BY AT LEAST ONE OF SAID ELEMENTS AND TO CAUSE A VACUUM ARC TO BE PRODUCED BETWEEN SAID ONE ELEMENT AND SAID ANODE TO GENERATE A SHORT X-RAY PULSE OF HIGH INTENSITY.
References Cited (Backward Citations)
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US2720607A
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |