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US4604525A
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Radiation image storage panel with dispersing agent
Assignee: Fujifilm Holdings Corp
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Filing: 1985-07-02
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Granted: 1986-08-05
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Expires: 2005-07-02
Abstract
Abstract In a radiation image storage panel comprising a support and a phosphor layer which comprises a binder and a stimulable phosphor dispersed therein and is colored with a colorant, the improvement which comprises said colorant is a pigment capable of absorbing a portion of stimulating rays for the stimulable phosphor and said phosphor layer contains a dispersing agent of at least one fatty acid ester selected from the group consisting of sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene fatty acid esters.
Inventors
- 👤 Akira Kitada
- 👤 Kikuo Yamazaki
- 👤 Hisashi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:22
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A radiation image storage panel comprising a support and a phosphor layer which comprises a binder and a stimulable phosphor dispersed therein and is colored with a colorant, characterized in that said colorant is a pigment capable of absorbing a portion of stimulating rays for the stimulable phosphor and said phosphor layer contains a dispersing agent of at least one fatty acid ester selected from the group consisting of sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene fatty acid esters.
Claim 2
Dependent Claim
83 words
A radiation image storage panel comprising a support and a phosphor layer which comprises a binder and a stimulable phosphor dispersed therein and is colored with a colorant, characterized in that said colorant is a pigment capable of absorbing a portion of stimulating rays for the stimulable phosphor and said phosphor layer contains a dispersing agent of at least one fatty acid ester selected from the group consisting of sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene fatty acid esters.
Claim 3
Dependent Claim
25 words
The radiation image storage panel as claimed in claim 1, in which said pigment is one having a body color ranging from blue to green.
Claim 4
Dependent Claim
36 words
The radiation image storage panel as claimed in claim 2, in which said pigment is at least one selected from the group consisting of ultramarine blue, cobalt blue, cerulean blue, chromium oxide and TiO 2 --ZnO--CoO--NiO.
Claim 5
Dependent Claim
17 words
The radiation image storage panel as claimed in claim 3, in which said pigment is ultramarine blue.
Claim 6
Dependent Claim
31 words
The radiation image storage panel as claimed in claim 1, in which said dispersing agent is contained within the range of from 0.01 to 30% by weight of the stimulable phosphor.
Claim 7
Dependent Claim
31 words
The radiation image storage panel as claimed in claim 5, in which said dispersing agent is contained within the range of from 0.01 to 5% by weight of the stimulable phosphor.
Claim 8
Dependent Claim
33 words
The radiation image storage panel as claimed in claim 1, in which the mixing ratio between said binder and said stimulable phosphor is within the range of from 1:8 to 1:40, by weight.
Claim 9
Dependent Claim
25 words
The radiation image storage panel as claimed in claim 1, in which said stimulable phosphor is a divalent europium activated alkaline earth metal fluorohalide phosphor.
Claim 10
Dependent Claim
25 words
The radiation image storage panel as claimed in claim 1, in which said stimulable phosphor is a rare earth element activated rare earth oxyhalide phosphor.
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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |