US3259773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum arc x-ray tube
Assignee: Field Emission Corp
•
Filing: 1961-09-25
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Granted: 1966-07-05
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Walter P Dyke
- 👤 Frank J Grundhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A VACUUM ARC X-RAY TUBE, WHICH COMPRISES: AN EVACUATED ENVELOPE, AN ANODE OF THIN SHEET METAL POSITIONED TO HAVE AT LEAST ONE SURFACE EXPOSED IN THE INTERIOR OF SAID ENVELOPE, A CATHODE HAVING AT LEAST ONE CATHODE ELEMENT POSITIONED IN SAID ENVELOPE, SAID CATHODE ELEMENT HAVING A SHARP FIELD EMISSION PORTION WITH A RADIUS OF CURVATURE LESS THAN 10-3 CENTIMETERS AND BEING SPACED FROM AND DIRECTED TOWARD SAID SURFACE OF SAID ANODE, AND ELECTRICAL CONNECTION MEANS LEADING TO SAID CATHODE AND ANODE SO THAT A HIGH VOLTAGE, HIGH CURRENT, PULSE ELECTRIC DISCHARGE CAN BE PRODUCED BETWEEN SAID CATHODE AND SAID ANODE TO PUNCTURE SAID ANODE AND SIMULTANEOUSLY PRODUCE A PULSE OF HIGH INTENSITY X-RAY RADIATION FROM THE SURFACE OF SAID ANODE REMOTE FROM SAID CATHODE.
Claim 2
Dependent Claim
125 words
A VACUUM ARC X-RAY TUBE, WHICH COMPRISES: AN EVACUATED ENVELOPE, AN ANODE OF THIN SHEET METAL POSITIONED TO HAVE AT LEAST ONE SURFACE EXPOSED IN THE INTERIOR OF SAID ENVELOPE, A CATHODE HAVING AT LEAST ONE CATHODE ELEMENT POSITIONED IN SAID ENVELOPE, SAID CATHODE ELEMENT HAVING A SHARP FIELD EMISSION PORTION WITH A RADIUS OF CURVATURE LESS THAN 10-3 CENTIMETERS AND BEING SPACED FROM AND DIRECTED TOWARD SAID SURFACE OF SAID ANODE, AND ELECTRICAL CONNECTION MEANS LEADING TO SAID CATHODE AND ANODE SO THAT A HIGH VOLTAGE, HIGH CURRENT, PULSE ELECTRIC DISCHARGE CAN BE PRODUCED BETWEEN SAID CATHODE AND SAID ANODE TO PUNCTURE SAID ANODE AND SIMULTANEOUSLY PRODUCE A PULSE OF HIGH INTENSITY X-RAY RADIATION FROM THE SURFACE OF SAID ANODE REMOTE FROM SAID CATHODE.
References Cited (Backward Citations)
US2090636A
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US2277712A
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US2329318A
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |