US3309523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube having field emission cathode and evaporative anode in combination with electrical pulser means
Assignee: Field Emission Corp
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Filing: 1963-06-24
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Granted: 1967-03-14
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Walter P Dyke
- 👤 Frank J Grundhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:16
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN X-RAY PULSE GENERATOR, COMPRISING: A DIODE X-RAY TUBE HAVING AN EVACUATED ENVELOPE; AN ANODE MOUNTED WITHIN SAID ENVELOPE; A FIELD EMISSION CATHODE MOUNTED WITHIN SAID ENVELOPE IN SPACED, INSULATED RELATIONSHIP WITH RESPECT TO SAID ANODE, SAID CATHODE HAVING A PLURALITY OF SPACED, SHARPENED EMITTER PORTIONS OF SUFFICIENTLY SMALL RADII OF CURVATURE TO ENABLE THE FIELD EMISSION OF ELECTRONS THEREFROM AND CAUSING SAID ELECTRONS TO BOMBARD SAID ANODE TO EMIT X-RAYS FROM SAID ANODE; AND PULSER MEANS FOR APPLYING ELECTRICAL PULSES OF SUFFICIENTLY HIGH VOLTAGE AND HIGH CURRENT BETWEEN SAID CATHODE AND SAID ANODE TO INITIATE THE FIELD EMISSION OF ELECTRONS FROM AT LEAST ONE EMITTER PORTION FOR EACH PULSE, AND TO CAUSE SOME OF THE MATERIAL OF SAID CATHODE TO VAPORIZE INTO POSITIVE IONS TO PRODUCE
Claim 2
Dependent Claim
127 words
AN X-RAY PULSE GENERATOR, COMPRISING: A DIODE X-RAY TUBE HAVING AN EVACUATED ENVELOPE; AN ANODE MOUNTED WITHIN SAID ENVELOPE; A FIELD EMISSION CATHODE MOUNTED WITHIN SAID ENVELOPE IN SPACED, INSULATED RELATIONSHIP WITH RESPECT TO SAID ANODE, SAID CATHODE HAVING A PLURALITY OF SPACED, SHARPENED EMITTER PORTIONS OF SUFFICIENTLY SMALL RADII OF CURVATURE TO ENABLE THE FIELD EMISSION OF ELECTRONS THEREFROM AND CAUSING SAID ELECTRONS TO BOMBARD SAID ANODE TO EMIT X-RAYS FROM SAID ANODE; AND PULSER MEANS FOR APPLYING ELECTRICAL PULSES OF SUFFICIENTLY HIGH VOLTAGE AND HIGH CURRENT BETWEEN SAID CATHODE AND SAID ANODE TO INITIATE THE FIELD EMISSION OF ELECTRONS FROM AT LEAST ONE EMITTER PORTION FOR EACH PULSE, AND TO CAUSE SOME OF THE MATERIAL OF SAID CATHODE TO VAPORIZE INTO POSITIVE IONS TO PRODUCE
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |