Patent US3389255A successfully refreshed from Google Patents.
US3389255A
Expired / Lapsed
US
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Intensifying screens
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1964-03-04
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Granted: 1968-06-18
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Takizawa Tatsuji
- 👤 Shimiya Keiji
- 👤 Kaji Akio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:42
CPC Classifications
G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN INTENSIFYING SCREEN FOR RADIOGRAPHY, COMPRISING A LAYER OF FLUORESCENT MATERIAL, A SUPPORTING LAYER CONSTITUTED OF A MATERIAL WHICH IS TRANSPARENT OF RADIATION, A METAL FOIL INTERPOSED BETWEEN SAID LAYER OF FLUORESCENT MATERIAL AND SAID SUPPORTING LAYER, ADHESIVE LAYERS SECURING THE METAL FOIL TO THE LAYER OF FLUORESCENT MATERIAL AND TO THE SUPPORTING LAYER TO FORM AN INTEGRAL BODY, SAID FLUORESCENT MATERIAL BEING COMPOSED OF A FLUORESCENT SUBSTANCE OF HIGH EMISSION EFFICIENCY TO RADIATION, SAID METAL FOIL BEING SELECTED FROM THE GROUP CONSISTING OF LEAD FOUL OF 0.01 TO 0.5 MM. IN THICKNESS AND A LEAD ALLOY FOIL EQUIVALENT THERETO, FOR PREVENTING SCATTERED RADIATION FROM REACHING THE SUPPORTING LAYER.
Claim 2
Dependent Claim
109 words
AN INTENSIFYING SCREEN FOR RADIOGRAPHY, COMPRISING A LAYER OF FLUORESCENT MATERIAL, A SUPPORTING LAYER CONSTITUTED OF A MATERIAL WHICH IS TRANSPARENT OF RADIATION, A METAL FOIL INTERPOSED BETWEEN SAID LAYER OF FLUORESCENT MATERIAL AND SAID SUPPORTING LAYER, ADHESIVE LAYERS SECURING THE METAL FOIL TO THE LAYER OF FLUORESCENT MATERIAL AND TO THE SUPPORTING LAYER TO FORM AN INTEGRAL BODY, SAID FLUORESCENT MATERIAL BEING COMPOSED OF A FLUORESCENT SUBSTANCE OF HIGH EMISSION EFFICIENCY TO RADIATION, SAID METAL FOIL BEING SELECTED FROM THE GROUP CONSISTING OF LEAD FOUL OF 0.01 TO 0.5 MM. IN THICKNESS AND A LEAD ALLOY FOIL EQUIVALENT THERETO, FOR PREVENTING SCATTERED RADIATION FROM REACHING THE SUPPORTING LAYER.
References Cited (Backward Citations)
US1909312A
Cited
US2144392A
Cited
US2413459A
Cited
US2904689A
Cited
US3124683A
Cited
US3237009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |