US4879202A — Radiation image storage panel and process for the…

Claim 1

Independent Claim 46 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding a phosphor layer-forming material containing a stimulable phosphor into a sheet and sintering the molded product to form a phosphor layer.

Claim 2

Dependent Claim 46 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding a phosphor layer-forming material containing a stimulable phosphor into a sheet and sintering the molded product to form a phosphor layer.

Claim 3

Dependent Claim 36 words

The process as claimed in claim 1, in which said phosphor layer-forming material is a powder material comprising the stimulable phosphor, and the powder material is charged into a molding tool to obtain a molded product.

Claim 4

Dependent Claim 37 words

The process as claimed in claim 1, in which said phosphor layer-forming material is a dispersion containing the stimulable phosphor and a binder, and the dispersion is poured into a molding tool to obtain a molded product.

Claim 5

Dependent Claim 36 words

The process as claimed in claim 1, in which said phosphor layer-forming material is a dispersion containing the stimulable phosphor and a binder, and the dispersion is applied on a substrate to obtain a molded product.

Claim 6

Dependent Claim 35 words

The process as claimed in claim 2, in which the molded product comprising said powder material is sintered at a temperature ranging from 500° to 1,000° C. in an inert atmosphere or a reducing atmosphere.

Claim 7

Dependent Claim 35 words

The process as claimed in claim 5, in which said molded product comprising the powder material is sintered at a temperature ranging from 700° to 950° C. in an inert atmosphere or a reducing atmosphere.

Claim 8

Dependent Claim 64 words

The process as claimed in claim 3 or 4, in which the binder contained in the molded product comprising said dispersion is vaporized at a temperature ranging from 100° to 450° C. in an inert atmosphere or an oxidizing atmosphere, and then the molded product is sintered at a temperature ranging from 500° to 1,000° C. in an inert atmosphere or a reducing atmosphere.

Claim 9

Dependent Claim 62 words

The process as claimed in claim 7, in which said binder contained in the molded product comprising the dispersion is vaporized at a temperature ranging from 300° to 400° C. in an inert atmosphere or an oxidizing atmosphere, and then the molded product is sintered at a temperature ranging from 700° to 950° C. in an inert atmosphere or a reducing atmosphere.

Claim 10

Dependent Claim 22 words

The process as claimed in claim 1, in which said stimulable phosphor is a divalent europium activated alkaline earth metal halide phosphor.

Claim 11

Dependent Claim 71 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding a phosphor layer-forming material containing a stimulable phosphor into a sheet, sintering the molded product and immersing the sintered product in a liquid containing a colorant capable of absorbing at least a portion of stimulating rays for the stimulable phosphor to form a colored phosphor layer.

Claim 12

Dependent Claim 71 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding a phosphor layer-forming material containing a stimulable phosphor into a sheet, sintering the molded product and immersing the sintered product in a liquid containing a colorant capable of absorbing at least a portion of stimulating rays for the stimulable phosphor to form a colored phosphor layer.

Claim 13

Dependent Claim 14 words

The process as claimed in claim 10, in which said colorant is a dye.

Claim 14

Dependent Claim 42 words

The process as claimed in claim 10, in which the mean reflectance of said colorant in the region of stimulation wavelength of the stimulable phosphor is lower than the mean reflectance thereof in the region of emission wavelength of the stimulable phosphor.

Claim 15

Dependent Claim 103 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding at least two phosphor layer-forming materials containing stimulable phosphors of mean diameters different from each other into a multi-layer sheet in such a manner that the materials are arranged in order of the mean diameter of the stimulable phosphor, and sintering the molded product to form a phosphor layer comprised of at least two layers, the relative density of each layer increasing in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 16

Dependent Claim 103 words

A process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding at least two phosphor layer-forming materials containing stimulable phosphors of mean diameters different from each other into a multi-layer sheet in such a manner that the materials are arranged in order of the mean diameter of the stimulable phosphor, and sintering the molded product to form a phosphor layer comprised of at least two layers, the relative density of each layer increasing in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 17

Dependent Claim 38 words

The process as claimed in claim 13, in which said phosphor layer-forming materials are two and the stimulable phosphors contained therein have mean diameters in the range of 0.1 to 20 μm and 1 to 100 μm, respectively.

Claim 18

Dependent Claim 48 words

The process as claimed in claim 13, in which said phosphor layer-forming materials are dispersions containing the stimulable phosphors and binders, and the dispersions are respectively applied on a substrate to form dried films and then the dried films are laminated to obtain a molded product of multi-layer.

Claim 19

Dependent Claim 41 words

The process as claimed in claim 13, in which said phosphor layer-forming materials are dispersions containing the stimulable phosphors and binders, and the dispersions are simultaneously applied on a substrate in a superposed form to obtain a molded product of multilayer.

Claim 20

Dependent Claim 40 words

The process as claimed in claim 13, in which said phosphor layer-forming materials are powder materials comprising the stimulable phosphors, and the powder materials are charged into a molding tool one after another to obtain a molded product of multi-layer.

Claim 21

Dependent Claim 92 words

The process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding at least two phosphor layer-forming materials containing stimulable phosphors and further additives of different kinds and/or in different amounts including 0 from each other into a multi-layer sheet, and sintering the molded product to form a phosphor layer composed of at least two layers, the relative density of each layer increasing in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 22

Dependent Claim 92 words

The process for the preparation of a radiation image storage panel which has a phosphor layer comprising a stimulable phosphor, which comprises steps of molding at least two phosphor layer-forming materials containing stimulable phosphors and further additives of different kinds and/or in different amounts including 0 from each other into a multi-layer sheet, and sintering the molded product to form a phosphor layer composed of at least two layers, the relative density of each layer increasing in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 23

Dependent Claim 43 words

The process as claimed in claim 18, in which said phosphor layer-forming materials containing additives in amounts different from each other are molded into the sheet in such a manner that the materials are arranged in order of the amount of the additive.

Claim 24

Dependent Claim 34 words

The process as claimed in claim 18, in which said phosphor layer-forming materials are two, which contain divalent europium activated alkaline earth metal fluorohalide phosphors and one of which further contains alkali metal halide.

Claim 25

Dependent Claim 30 words

The process as claimed in claim 20, in which said alkali metal halide is contained in the phosphor layer-forming material in an amount of 0.01-10% by weight of the phosphor.

Claim 26

Dependent Claim 48 words

The process as claimed in claim 18, in which said phosphor layer-forming materials are dispersions containing the stimulable phosphors and binders, and the dispersions are respectively applied on a substrate to form dried films and then the dried films are laminated to obtain a molded product of multi-layer.

Claim 27

Dependent Claim 41 words

The process as claimed in claim 18, in which said phosphor layer-forming materials are dispersions containing the stimulable phosphors and binders, and the dispersions are simultaneously applied on a substrate in a superposed form to obtain a molded product of multi-layer.

Claim 28

Dependent Claim 40 words

The process as claimed in claim 18, in which said phosphor layer-forming materials are powder materials comprising the stimulable phosphors, and the powder materials are charged into a molding tool one after another to obtain a molded product of multi-layer.

Claim 29

Dependent Claim 32 words

A radiation image storage panel having a sintered stimulable phosphor layer which consists essentially of a sintered stimulable phosphor, has a relative density of not less than 70%, and is binder free.

Claim 30

Dependent Claim 32 words

A radiation image storage panel having a sintered stimulable phosphor layer which consists essentially of a sintered stimulable phosphor, has a relative density of not less than 70%, and is binder free.

Claim 31

Dependent Claim 65 words

A radiation image storage panel having a sintered stimulable phosphor layer which consists essentially of a sintered stimulable phosphor and has a relative density of not less than 70%, in which said phosphor layer is composed of at least two layers and the relative density of each layer increases in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 32

Dependent Claim 65 words

A radiation image storage panel having a sintered stimulable phosphor layer which consists essentially of a sintered stimulable phosphor and has a relative density of not less than 70%, in which said phosphor layer is composed of at least two layers and the relative density of each layer increases in the direction perpendicular to the panel plane toward the read out side of the panel.

Claim 33

Dependent Claim 37 words

The radiation image storage panel as claimed in claim 26, in which each of said phosphor layers contains an additive of different kind and/or in a different amount including 0 from those of the other phosphor layers.

Claim 34

Dependent Claim 43 words

The radiation image storage panel as claimed in claim 27, in which said phosphor layers are two layers, the stimulable phosphors in both the layers are divalent europium activated alkaline earth metal fluorohalide phosphors and one of the layers contains alkali metal halide.

Claim 35

Dependent Claim 32 words

The radiation image storage panel as claimed in claim 28, in which said alkali metal halide is contained in the phosphor layer in an amount of 0.01-10% by weight of the phosphor.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-11-06	1993-05-08	1993-11-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-11-06	1997-05-08	1997-11-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-11-06	2001-05-08	2001-11-07	$7700.00	Window Closed / Lapsed

Radiation image storage panel and process for the preparation of the same

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