US4450223A
Expired / Lapsed
US
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Diffusion transfer material and process
Assignee: Agfa Gevaert NV
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Filing: 1983-02-14
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Granted: 1984-05-22
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Expires: 2003-02-14
Abstract
Abstract A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula: ##STR1## wherein: R 10 and R 20 (same or different) (1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form, (2) represent an aryl group including a substituted aryl group, or (3) represent a heterocyclic ring residue including such residue in substituted form, or R 10 and R 20 are ringclosed, either R 10 or R 20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid; L 1 and L 2 (same or different) represent a ##STR2## --SO 2 --; --NHCO--; --NHSO 2 --; ##STR3## --O--SO 2 -- or ##STR4## group; p and q (same or different) represent an integer 0 or 1; Z represents an atom or an atom group which is electronegative with respect to carbon, and PUG represents together with Z a releasable photographically useful group.
Inventors
- 👤 Raphael K. Van Poucke
- 👤 Christian C. Van de Sande
- 👤 Andree Verhecken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; C; C09; C09B; C09B29/00; C09B29/0003; C09B29/06; C09B29/095; C09B29/24; C09B29/28; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/159; Y10S430/161
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
227 words
A photographic silver halide material comprising a support carrying at least one unexposed alkali-permeable silver halide hydrophilic colloid emulsion layer and containing a compound, which is immobile in an alkali-permeable colloid medium when contacted with an alkaline liquid and which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide in the photographic material and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following general formula: ##STR31## wherein: R 10 and R 20 (same or different) (1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group, (2) represent an aryl group, or (3) represent a heterocyclic ring residue, or R 10 and R 20 are ringclosed, either R 10 or R 20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid; L 1 and L 2 (same or different) represent a ##STR32## --SO 2 --; --NHCO--; --NHSO 2 --; ##STR33## --O--SO 2 -- or ##STR34## group; p and q (same or different) represent an integer 0 or 1; Z represents an atom or an atom group which is electronegative with respect to carbon, and PUG represents together with Z a releasable photographically useful group.
Claim 2
Dependent Claim
227 words
A photographic silver halide material comprising a support carrying at least one unexposed alkali-permeable silver halide hydrophilic colloid emulsion layer and containing a compound, which is immobile in an alkali-permeable colloid medium when contacted with an alkaline liquid and which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide in the photographic material and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following general formula: ##STR31## wherein: R 10 and R 20 (same or different) (1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group, (2) represent an aryl group, or (3) represent a heterocyclic ring residue, or R 10 and R 20 are ringclosed, either R 10 or R 20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid; L 1 and L 2 (same or different) represent a ##STR32## --SO 2 --; --NHCO--; --NHSO 2 --; ##STR33## --O--SO 2 -- or ##STR34## group; p and q (same or different) represent an integer 0 or 1; Z represents an atom or an atom group which is electronegative with respect to carbon, and PUG represents together with Z a releasable photographically useful group.
Claim 3
Dependent Claim
17 words
A photographic material according to claim 1, characterized in that Z represents --S-- or --SO 2 --.
Claim 4
Dependent Claim
20 words
A photographic material according to claim 1, characterized in that PUG represents a dye group or a shifted dye group.
Claim 5
Dependent Claim
116 words
A photographic material according to claim 1, characterized in that it comprises a support carrying (1) a red-sensitive silver halide emulsion layer having operatively associated therewith a said compound that is initially immobile in an alkali-permeable colloid medium and wherefrom through the reducing action of a silver halide developing agent a cyan dye is split off in diffusible state, (2) a green-sensitive silver halide emulsion layer having operatively associated therewith said compound of (1) with the difference that a magenta dye is split off in diffusible state, and (3) a blue-sensitive silver halide emulsion layer having operatively associated therewith said compound of (1) with the difference that a yellow dye is split off in diffusible state.
Claim 6
Dependent Claim
18 words
A photographic material according to claim 3, characterized in that the dye group is a shifted dye group.
Claim 7
Dependent Claim
19 words
A photographic material according to claim 1, characterized in that the silver halide emulsion layer(s) is (are) negative working.
Claim 8
Dependent Claim
67 words
A photographic material according to claim 1, characterized in that the photosensitive silver halide emulsion layer(s) is (are) negative-working and applied to the same support as a non-light-sensitive receptor layer so as to form an integral combination of light-sensitive layer(s) with the non-light-sensitive receptor layer and an opaque layer, which is alkali-permeable, reflective to light and located between the receptor layer and the silver halide emulsion layer(s).
Claim 9
Dependent Claim
159 words
A photographic material according to claim 1, characterized in that the material is a film unit that is adapted to be processed by passing said unit between a pair of juxtaposed pressure-applying members, said unit comprising (1) a photosensitive element, which contains a silver halide emulsion layer having associated therewith said compound that is initially immobile in an alkali-permeable colloid medium and wherefrom through the reducing action of a silver halide developing agent a dye is split off in diffusible state, (2) an image dye-receiving layer, (3) means for discharging an alkaline processing composition within the film unit, said means being a rupturable container, which is adapted to be positioned during processing of the film so that a compressive force applied to the container by the pressure-applying members will effect a discharge of the container's contents within the film, and (4) a silver halide developing agent, which is soluble in an alkaline processing composition located within said film unit.
Claim 10
Dependent Claim
21 words
A photographic material according to claim 1, characterized in that the silver halide emulsion layer(s) contain(s) a silver halide developing agent.
Claim 11
Dependent Claim
26 words
A photographic material according to claim 1, characterized in that said compound is present in a hydrophilic colloid layer adjacent to a silver halide emulsion layer.
Claim 12
Dependent Claim
24 words
A photographic material according to claim 1, characterized in that the photographic material includes as developing agent a hydroquinone compound or a 1-aryl-3-pyrazolidinone compound.
Claim 13
Dependent Claim
57 words
A photographic material according to claim 1, characterized in that the compound(s) are used in the photographic material in conjunction with a mixture of reducing agents at least one of which is a compound called electron donor (ED-compound) or electron donor precursor compound (EDP-compound) and at least one of which is a compound called electron-transfer agent (ETA-compound).
Claim 14
Dependent Claim
90 words
A photograhic material according to claim 12, characterized in that the EDP-compound is a benzofuran derivative corresponding to the following general formula: ##STR35## wherein: R 11 represents a carbocyclic or heterocyclic aromatic ring, R 12 , R 13 and R 14 (same or different) represent hydrogen, alkyl, alkenyl, aryl, alkoxy, alkylthio, amino, or R 13 and R 14 represent together an adjacent carboxyclic ring, and wherein at least one of R 11 , R 12 , R 13 and R 14 represent a ballast group having from 10-22 carbon atoms.
Claim 15
Dependent Claim
41 words
A photographic material according to claim 12, characterized in that the ED- or ED-precursor compound is present in the photographic material in a molar ratio of 1:1 to 8:1 with respect to the compound capable of releasing the photographically useful 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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |