Patent US4237214A successfully refreshed from Google Patents.
US4237214A
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Process for forming contrasty image
Assignee: Fujifilm Holdings Corp
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Filing: 1979-07-05
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Granted: 1980-12-02
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Expires: 1999-07-05
Abstract
Abstract A process for forming a very contrasty negative photographic image which comprises developing a photographic light-sensitive material comprising a support having thereon at least one layer of a negative image monodispersed silver halide photographic emulsion comprising substantially surface latent image type silver halide grains, wherein the average grain size of the silver halide grains is 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of 250 g or less per mol of silver halide, and at least one hydrographic colloid layer containing a compound represented by the following general formula (I): R1NHNHCOR2 (I) wherein R1 represents an aryl group and R2 represents a hydrogen atom, a phenyl group or an alkyl group having 1 to 3 carbon atoms, in the presence of a compound represented by the following general formula (II) or (III): <IMAGE> (II) <IMAGE> (III) wherein Z1 and Z2, which may be the same or different, each represents an atomic group necessary to complete a thiazole ring or a selenazole ring; R3 and R5 which may be the same or different, each represents an alkyl group which may be substituted or an alkenyl group which may be substituted; R4 represents a hydrogen atom or an alkyl group which may be substituted; and R3 and R4 may combine to form a ring; L represents a sulfur atom or a divalent hydrocarbon group; X- represents an acid anion; m represents 0 or 1; n represents 0, 1 or 2 and when an inner salt or inner salts are formed m represents 0 or n represents 0 or 1.
Inventors
- 👤 Hiroyuki Mifune
- 👤 Shunji Takada
- 👤 Yoshitaka Akimura
- 👤 Nobuyuki Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; G03C1/061; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
317 words
A process for forming a negative photographic image which comprises developing with a developing solution containing at least one para dihydroxy benzene compound as a developing agent an imagewise exposed photographic light-sensitive material comprising a support having thereon at least one layer of a negative image providing monodispersed silver halide photographic emulsion comprising substantially surface latent image type monodispersed silver halide grains, wherein the average grain size of the silver halide grains is 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of 250 g or less per mol of silver halide, and at least one hydrographic colloid layer containing a compound represented by the following general formula (I): R.sup.1 NHNHCOR (I) wherein R 1 represents an aryl group and R 2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms, in the presence of a compound represented by the following general formula (II) or (III), said compound of the general formula (II) or (III) being in the light-sensitive material, a developer solution or in a processing bath used after exposure but prior to development ##STR9## wherein Z 1 and Z 2 , which may be the same or different, each represents an atomic group necessary to complete a thiazole ring or a selenazole ring; R 3 and R 5 , which may be the same or different, each represents an alkyl group or an alkenyl group; R 4 represents a hydrogen atom or an alkyl group; and R 3 and R 4 may combine to form a ring; L represents a sulfur atom or a divalent hydrocarbon group having 1 to 12 carbon atoms; X - represents an acid anion; m represents 0 or 1; n represents 0, 1 or 2 and when an inner salt or inner salts are formed m represents 0 or n represents 0 or 1.
Claim 2
Dependent Claim
317 words
A process for forming a negative photographic image which comprises developing with a developing solution containing at least one para dihydroxy benzene compound as a developing agent an imagewise exposed photographic light-sensitive material comprising a support having thereon at least one layer of a negative image providing monodispersed silver halide photographic emulsion comprising substantially surface latent image type monodispersed silver halide grains, wherein the average grain size of the silver halide grains is 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of 250 g or less per mol of silver halide, and at least one hydrographic colloid layer containing a compound represented by the following general formula (I): R.sup.1 NHNHCOR (I) wherein R 1 represents an aryl group and R 2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms, in the presence of a compound represented by the following general formula (II) or (III), said compound of the general formula (II) or (III) being in the light-sensitive material, a developer solution or in a processing bath used after exposure but prior to development ##STR9## wherein Z 1 and Z 2 , which may be the same or different, each represents an atomic group necessary to complete a thiazole ring or a selenazole ring; R 3 and R 5 , which may be the same or different, each represents an alkyl group or an alkenyl group; R 4 represents a hydrogen atom or an alkyl group; and R 3 and R 4 may combine to form a ring; L represents a sulfur atom or a divalent hydrocarbon group having 1 to 12 carbon atoms; X - represents an acid anion; m represents 0 or 1; n represents 0, 1 or 2 and when an inner salt or inner salts are formed m represents 0 or n represents 0 or 1.
Claim 3
Dependent Claim
27 words
The process for forming a photographic image as claimed in claim 1, wherein the aryl group represented by R 1 is a monocyclic or bicyclic aryl group.
Claim 4
Dependent Claim
175 words
The process for forming a photographic image as claimed in claim 1, wherein the compound represented by the general formula (II) is a compound represented by the general formula (IIa). wherein W represents a sulfur atom or a selenium atom; R 3 , R 4 and X - each has the same meaning as in the general formula (II); R 6 and R 7 , which may be the same or different, each represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a sulfo group, a carboxy group, an alkoxycarbonyl group having 2 to 18 carbon atoms, an acyl group having 2 to 18 carbon atoms, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, an alkylthio group having 1 to 18 carbon atoms, an acylamino group having 2 to 18 carbon atoms, a hydroxy group, a phenyl group or an aralkyl group having 7 to 12 carbon atoms, and wherein R 6 and R 7 may combine and form a ring.
Claim 5
Dependent Claim
40 words
The process for forming a photographic image as claimed in claim 1, wherein the compound represented by the general formula (I) is a compound represented by the general formula (Ia). R.sup.1 NHNHCHO (Ia) wherein R 1 represents an aryl group.
Claim 6
Dependent Claim
45 words
The process for forming a photographic image as claimed in claim 4, wherein the compound represented by the general formula (Ia) is a compound represented by the general formula (Ib). R.sup.11 NHNHCHO (Ib) wherein R 11 represents an unsubstituted phenyl group or a tolyl group.
Claim 7
Dependent Claim
27 words
The process for forming a photographic image as claimed in claim 1, wherein the average grain size of said silver halide grains is 0.4 micron or less.
Claim 8
Dependent Claim
23 words
The process for forming a photographic image as claimed in claim 1, wherein the silver halide emulsion is a sulfur-sensitized silver halide emulsion.
Claim 9
Dependent Claim
32 words
The process for forming a photographic image as claimed in claim 1, wherein the photographic light-sensitive material is developed with a developer solution having a pH of about 11 to about 12.3.
Claim 10
Dependent Claim
31 words
The process for forming a photographic image as claimed in claim 1, wherein the compound represented by the general formula (I) is present in said negative image silver halide photographic emulsion.
Claim 11
Dependent Claim
42 words
The process for forming a photographic image as claimed in claim 1, wherein the compound represented by the general formula (I) and the compound represented by the general formula (II) or (III) are present in said negative image silver halide photographic emulsion.
Claim 12
Dependent Claim
33 words
The process for forming a photographic image as claimed in claim 1, wherein a compound represented by the general formula (II) is used, but a compound of the formula (III) is not used.
Claim 13
Dependent Claim
43 words
The process for forming a photographic image as claimed in claim 1, wherein R 2 is a hydrogen atom, a methyl group, an unsubstituted phenyl group or a phenyl group which is substituted with one or more substituents which are electron attracting groups.
Claim 14
Dependent Claim
50 words
The process for forming a photographic image as claimed in claim 11, wherein R 2 is a hydrogen atom, a methyl group, an unsubstituted phenyl group or a phenyl group which is substituted with a halogen atom, a cyano group, a trifluoromethyl group, a carboxyl group or a sulfo group.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |