Patent US3344276A successfully refreshed from Google Patents.
US3344276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic screen having channels filled with a material which emits photons when energized by gamma or x-rays
Assignee: Rockwell Collins ElectroMechanical Systems Inc
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Filing: 1964-03-30
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Granted: 1967-09-26
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 George H Balding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:59
CPC Classifications
G; G21; G21K; G21K4/00; G01; G01T; G01T1/00; G01T1/16; G01T1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A RADIOGRAPHIC SCREEN COMPRISING A PLURALITY OF SUPERPOSED CONTIGUOUSLY RELATED OPAQUE METAL LAYERS EACH HAVING A MULTIPLICITY OF CLOSELY ARRAYED UNIFORMLY ARRANGED OPENINGS CHEMICALLY ETCHED THROUGH THE THICKNESS THEREOF, WHICH OPENINGS ARE OF A UNIFORM WIDTH GREATER THAN THE THICKNESS OF THE INDIVIDUAL LAYERS AND THE LESS THAN .030 INCH, THE OPENINGS THROUGH SAID LAYERS BEING ALIGNED WITH OPENING IN OTHER OF SAID LAYERS TO CONSTITUTE LONG AND NARROW CHANNELS EXTENDING AXIALLY OF THE SCREEN FROM FRONT TO REAR AND FILLED WITH MATERIAL WHICH EMITS PHOTONS WHEN ENERGIZED BY GAMMA AND X-RAYS OF HIGH ENERGY LEVEL, THE LENGTH OF SAID CHANNELS BEING SUFFICIENTLY LONGER THAN THE WIDTH OF SAID OPENING SO AS TO RETARD THOSE HIGH ENERGY LEVEL GAMMA AND X-RAYS PASSING AXIALLY INTO SAID CHANNELS AND CAUSING SAID MATERIAL THEREIN TO EMIT PHOTONS, THE WALLS OF SAID CHANNELS BEING REFLECTIVE TO
Claim 2
Dependent Claim
142 words
A RADIOGRAPHIC SCREEN COMPRISING A PLURALITY OF SUPERPOSED CONTIGUOUSLY RELATED OPAQUE METAL LAYERS EACH HAVING A MULTIPLICITY OF CLOSELY ARRAYED UNIFORMLY ARRANGED OPENINGS CHEMICALLY ETCHED THROUGH THE THICKNESS THEREOF, WHICH OPENINGS ARE OF A UNIFORM WIDTH GREATER THAN THE THICKNESS OF THE INDIVIDUAL LAYERS AND THE LESS THAN .030 INCH, THE OPENINGS THROUGH SAID LAYERS BEING ALIGNED WITH OPENING IN OTHER OF SAID LAYERS TO CONSTITUTE LONG AND NARROW CHANNELS EXTENDING AXIALLY OF THE SCREEN FROM FRONT TO REAR AND FILLED WITH MATERIAL WHICH EMITS PHOTONS WHEN ENERGIZED BY GAMMA AND X-RAYS OF HIGH ENERGY LEVEL, THE LENGTH OF SAID CHANNELS BEING SUFFICIENTLY LONGER THAN THE WIDTH OF SAID OPENING SO AS TO RETARD THOSE HIGH ENERGY LEVEL GAMMA AND X-RAYS PASSING AXIALLY INTO SAID CHANNELS AND CAUSING SAID MATERIAL THEREIN TO EMIT PHOTONS, THE WALLS OF SAID CHANNELS BEING REFLECTIVE TO
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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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |