Patent US5462560A successfully refreshed from Google Patents.
US3126480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for x-ray fluoroscopy or photofluorography
Assignee: —
•
Filing: —
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Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A DEVICE FOR X-RAY FLUOROSCOPY OR X-RAY PHOTOFLUOROGRAPHY, COMPRISING A SUBSTANTIALLY POINT-SHAPED SOURCE OF X-RAYS, A FLUORESCENT SCREEN TO RECEIVE AN X-RAY IMAGE OF AN AREA OF AN OBJECT IRRADIATED BY SAID X-RAYS, AN X-RAY DIAPHRAGM BETWEEN SAID SOURCE AND SAID OBJECT HAVING AN APERTURE OF VARIABLE SIZE FOR CONTROLLING SAID AREA BEING IRRADIATED, AN IMAGE INTENSIFIER TUBE HAVING A PHOTO-EMISSIVE CATHODE, AN ELECTRON-OPTICAL LENS SYSTEM AND AN ANODE SCREEN, SAID TUBE BEING POSITIONED TO RECEIVE A LIGHT IMAGE FROM SAID FLUORESCENT SCREEN ON SAID PHOTO-EMISSIVE CATHODE, SAID ELECTRON-OPTICAL LENS SYSTEM PRODUCING ON SAID ANODE-SCREEN SHARP ELECTRON REPLICA IMAGES AT VARIABLE MAGNIFICATION OF SAID LIGHT IMAGE ON SAID PHOTO-EMISSIVE CATHODE, MEANS FOR VARYING THE SIZE OF SAID APERTURE AND SO THE SIZE OF THE LIGHT IMAGE ON SAID PHOTOEMISSIVE CATHODE, AND MEANS FOR VARYING THE MAGNIFICATION OF SAID ELECTRON-OPTICAL SYSTEM TO MAINTAIN THE ELECTRON IMAGE ON SAID ANODE SCREEN SUBSTANTIALLY OF THE SAME PREDETERMINED SIZE WHEN THE SIZE OF SAID APERTURE IS VARIED, AND GANG CONTROL MEANS CONTROLLING SAID MEANS FOR VARYING THE SIZE OF SAID APERTURE AND SAID MEANS FOR VARYING THE MAGNIFICATION OF SAID ELECTRON-OPTICAL SYSTEM.
Claim 2
Independent Claim
188 words
A DEVICE FOR X-RAY FLUOROSCOPY OR X-RAY PHOTOFLUOROGRAPHY, COMPRISING A SUBSTANTIALLY POINT-SHAPED SOURCE OF X-RAYS, A FLUORESCENT SCREEN TO RECEIVE AN X-RAY IMAGE OF AN AREA OF AN OBJECT IRRADIATED BY SAID X-RAYS, AN X-RAY DIAPHRAGM BETWEEN SAID SOURCE AND SAID OBJECT HAVING AN APERTURE OF VARIABLE SIZE FOR CONTROLLING SAID AREA BEING IRRADIATED, AN IMAGE INTENSIFIER TUBE HAVING A PHOTO-EMISSIVE CATHODE, AN ELECTRON-OPTICAL LENS SYSTEM AND AN ANODE SCREEN, SAID TUBE BEING POSITIONED TO RECEIVE A LIGHT IMAGE FROM SAID FLUORESCENT SCREEN ON SAID PHOTO-EMISSIVE CATHODE, SAID ELECTRON-OPTICAL LENS SYSTEM PRODUCING ON SAID ANODE-SCREEN SHARP ELECTRON REPLICA IMAGES AT VARIABLE MAGNIFICATION OF SAID LIGHT IMAGE ON SAID PHOTO-EMISSIVE CATHODE, MEANS FOR VARYING THE SIZE OF SAID APERTURE AND SO THE SIZE OF THE LIGHT IMAGE ON SAID PHOTOEMISSIVE CATHODE, AND MEANS FOR VARYING THE MAGNIFICATION OF SAID ELECTRON-OPTICAL SYSTEM TO MAINTAIN THE ELECTRON IMAGE ON SAID ANODE SCREEN SUBSTANTIALLY OF THE SAME PREDETERMINED SIZE WHEN THE SIZE OF SAID APERTURE IS VARIED, AND GANG CONTROL MEANS CONTROLLING SAID MEANS FOR VARYING THE SIZE OF SAID APERTURE AND SAID MEANS FOR VARYING THE MAGNIFICATION OF SAID ELECTRON-OPTICAL SYSTEM.
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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |