US4040833A
Expired / Lapsed
US
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Radiographic process and sensitive material for the same
Assignee: Fujifilm Holdings Corp
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Filing: 1976-04-02
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Granted: 1977-08-09
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Expires: 1996-04-02
Abstract
Abstract In a process for forming radiographic images which comprises exposing a photograhic sensitive material comprising a support and at least one silver halide photographic emulsion layer to radiation from a fluorescent intensifying screen to form a latent image and thereafter developing the same, the improvement which comprises the fluorescent intensifying screen having a maximum emission wavelength in the range of about 500 to about 570 nm and a distribution such that at least about 1/2 of the emission energy is at a wavelength of above about 400 nm, and said silver halide photographic emulsion layer contains at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II): ##STR1## WHEREIN R o represents an alkyl group and R 1 and R 2 each represent an alkyl group but at least one of R 1 and R 2 represents a sulfoalkyl group, X represents an anion, and m represents an integer of 1 or 2, and m = 1 when the dye forms an inner salt; ##STR2## wherein Z represents the group of atoms necessary to complete a benzoxazole nucleus, R 3 represents an alkyl group, and Q represents the group of atoms necessary to complete a 2-thioimidazolidine-2,4-dione nucleus.
Inventors
- 👤 Masanao Hinata
- 👤 Haruo Takei
- 👤 Nobuaki Miyasaka
- 👤 Kenji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:44
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7767; C09K11/7769; C09K11/7771; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C5/00; G03C5/16; G03C5/17; G21; G21K; G21K4/00; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
203 words
In a process for forming radiographic images which comprises exposing a photographic sensitive material comprising a support and at least one silver halide photographic emulsion layer to radiation from a fluorescent intensifying screen to form a latent image and thereafter developing the same, the improvement which comprises the fluorescent intensifying screen having a maximum emission wavelength in the range of about 500 to about 570 nm and a distribution such that at least about 1/2 of the emission energy is at a wavelength of above about 400 nm, and said silver halide photographic emulsion layer contains at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II): ##STR10## wherein R o represents an alkyl group and R 1 and R 2 each represent an alkyl group, but at least one of R 1 and R 2 represents a sulfoalkyl group, X represents an anion, and m represents an integer of 1 or 2, and m=1 when the dye forms an inner salt, ##STR11## wherein Z represents the group of atoms necessary to complete a benzoxazole nucleus, R 3 represents an alkyl group, and Q represents the group of atoms necessary to complete a 2-thioimidazolidine-2,4-dione nucleus.
Claim 2
Dependent Claim
203 words
In a process for forming radiographic images which comprises exposing a photographic sensitive material comprising a support and at least one silver halide photographic emulsion layer to radiation from a fluorescent intensifying screen to form a latent image and thereafter developing the same, the improvement which comprises the fluorescent intensifying screen having a maximum emission wavelength in the range of about 500 to about 570 nm and a distribution such that at least about 1/2 of the emission energy is at a wavelength of above about 400 nm, and said silver halide photographic emulsion layer contains at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II): ##STR10## wherein R o represents an alkyl group and R 1 and R 2 each represent an alkyl group, but at least one of R 1 and R 2 represents a sulfoalkyl group, X represents an anion, and m represents an integer of 1 or 2, and m=1 when the dye forms an inner salt, ##STR11## wherein Z represents the group of atoms necessary to complete a benzoxazole nucleus, R 3 represents an alkyl group, and Q represents the group of atoms necessary to complete a 2-thioimidazolidine-2,4-dione nucleus.
Claim 3
Dependent Claim
20 words
The process according to claim 1, wherein both R 1 and R 2 in formula (I) represent a sulfoalkyl group.
Claim 4
Dependent Claim
16 words
The process according to claim 1, wherein R 3 in formula (II) represents a sulfoalkyl group.
Claim 5
Dependent Claim
28 words
The process according to claim 1, wherein said silver halide emulsion comprises silver iodobromide particles having an average particle size of from about 1.0 to about 2.0 μ.
Claim 6
Dependent Claim
29 words
The process according to claim 1, wherein R 1 and R 2 in formula (I) represent a sulfoalkyl group and R 3 in formula (II) represents a sulfoalkyl group.
Claim 7
Dependent Claim
56 words
The process according to claim 1, wherein both R 1 and R 2 in formula (I) represent a sulfoalkyl group, R 3 in formula (II) represents a sulfoalkyl group and the silver halide emulsion layer comprises a silver iodobromochloride or silver iodobromide emulsion having an average particle size of from about 1.0 to about 2.0 μ.
Claim 8
Dependent Claim
23 words
The process according to claim 6, wherein the silver halide emulsion comprises silver iodobromide particles containing not more than about 3.0 mol% iodide.
Claim 9
Dependent Claim
35 words
The process according to claim 1, wherein said fluorscent intensifying screen comprises gadolinium oxysulfide activated by terbium, yttrium oxysulfide activated by terbium, lanthanum oxysulfide activated by terbium or a mixture of two or more thereof.
Claim 10
Dependent Claim
28 words
The process according to claim 1, wherein a pair of said intensifying screens are utilized and said radiographic sensitive material is interposed therebetween at the time of exposure.
Claim 11
Dependent Claim
72 words
A process according to claim 1, wherein a total of from about 1.0 × 10 - 5 to about 1.0 × 10 - 3 moles of one or more sensitizing dyes of general formula (I) is used in combination with from about 1.0 × 10 - 5 to about 1.0 × 10 - 3 moles of one or more sensitizing dyes of general formula (II), both based per mole of silver halide.
Claim 12
Dependent Claim
38 words
A process according to claim 10, wherein the molar ratio of the one or more dyes represented by formula (I)/one or more dyes represented by formula (II) is in the range of from about 10/1 to about 1/10.
Claim 13
Dependent Claim
133 words
A photographic sensitive material comprising a support and at least one silver halide photographic emulsion layer wherein said silver halide photographic emulsion layer contains at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II): ##STR12## wherein R o represents an alkyl group and R 1 and R 2 each represent an alkyl group but at least one of R 1 and R 2 represents a sulfoalkyl group, X represents an anion, and m represents an integer of 1 or 2, and m = 1 when the dye forms an inner salt: ##STR13## wherein Z represents the group of atoms necessary to complete a benzoxazole nucleus, R 3 represents an alkyl group, and Q represents the group of atoms necessary to complete a 2-thioimidazolidine-2,4-dione nucleus.
Claim 14
Dependent Claim
133 words
A photographic sensitive material comprising a support and at least one silver halide photographic emulsion layer wherein said silver halide photographic emulsion layer contains at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II): ##STR12## wherein R o represents an alkyl group and R 1 and R 2 each represent an alkyl group but at least one of R 1 and R 2 represents a sulfoalkyl group, X represents an anion, and m represents an integer of 1 or 2, and m = 1 when the dye forms an inner salt: ##STR13## wherein Z represents the group of atoms necessary to complete a benzoxazole nucleus, R 3 represents an alkyl group, and Q represents the group of atoms necessary to complete a 2-thioimidazolidine-2,4-dione nucleus.
Claim 15
Dependent Claim
74 words
A photographic sensitive material according to claim 12, wherein a total of from about 1.0 × 10 - 5 to about 1.0 × 10 - 3 moles of one or more sensitizing dyes of general formula (I) is used in combination with from about 1.0 × 10 - 5 to about 1.0 × 10 - 3 moles of one or more sensitizing dyes of general formula (II), both based per mole of silver halide.
Claim 16
Dependent Claim
40 words
A photographic sensitive material according to claim 13, wherein the molar ratio of the one or more dyes represented by formula (I)/one or more dyes represented by formula (II) is in the range of from about 10/1 to about 1/10.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |