Patent US429672A successfully refreshed from Google Patents.
Patent US4469780A successfully refreshed from Google Patents.
US4469780A
Expired / Lapsed
US
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Color image forming process
Assignee: Fujifilm Holdings Corp
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Filing: 1983-01-27
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Granted: 1984-09-04
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Expires: 2003-01-27
Abstract
Abstract A process for forming a color image is disclosed. The process involves providing a color light-sensitive photographic material and imagewise exposing the material. The latent images within the exposed material are then developed and subjected to intensification processing. Thereafter, the material is subjected to treatment with a dilute buffer solution having a pH adjusted within the range of 2 to 7. The process allows for the elimination of the washing step conventionally used in processing photographic materials. Furthermore, the process provides color images having a reduced amount of staining and a large intensification factor while utilizing color photographic materials containing an extremely small amount of silver.
Inventors
- 👤 Hiroyuki Hirai
- 👤 Koichi Nakamura
- 👤 Haruhiko Iwano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:10
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
143 words
A process for forming a color image, comprising the steps of: providing a light-sensitive silver halide color photographic material; imagewise exposing the material in order to form a latent image; subjecting the material to color development and intensification processing in order to develop the latent image and form a developed and intensified image, the color development and intensification processing being carried out in a combined developing and intensifying bath containing a compound selected from the group consisting of hydrogen peroxide and a compound capable of releasing hydrogen peroxide and a developing agent, said combined bath not containing substantially any bromide ion or any iodide ion, the combined bath further comprising at least one nitrogen-containing heterocyclic compound; and treating the material with a non-bleach, non-fix, dilute buffer solution containing a buffer agent and having a pH adjusted within the range of 2 to 7.
Claim 2
Dependent Claim
143 words
A process for forming a color image, comprising the steps of: providing a light-sensitive silver halide color photographic material; imagewise exposing the material in order to form a latent image; subjecting the material to color development and intensification processing in order to develop the latent image and form a developed and intensified image, the color development and intensification processing being carried out in a combined developing and intensifying bath containing a compound selected from the group consisting of hydrogen peroxide and a compound capable of releasing hydrogen peroxide and a developing agent, said combined bath not containing substantially any bromide ion or any iodide ion, the combined bath further comprising at least one nitrogen-containing heterocyclic compound; and treating the material with a non-bleach, non-fix, dilute buffer solution containing a buffer agent and having a pH adjusted within the range of 2 to 7.
Claim 3
Dependent Claim
33 words
A process for forming a color image as claimed in claim 1, wherein the concentration of the buffer agent in the buffer solution ranges from 1×10 -2 mole to 1 mole per liter.
Claim 4
Dependent Claim
33 words
A process for forming a color image as claimed in claim 1, wherein the concentration of the buffer agent in buffer solution ranges from 1×10 -2 mole to 1×10 -1 mole per liter.
Claim 5
Dependent Claim
33 words
A process for forming a color image as claimed in claim 1, wherein the buffer solution is further comprised of a compound capable of depressing the intensifying activity of silver halide fog nuclei.
Claim 6
Dependent Claim
53 words
A process for forming a color image as claimed in claim 4, wherein the compound capable of depressing the intensifying activity of silver halide fog nuclei is present in the buffer solution in an amount of within the range of from 1×10 -5 to 2×10 -1 mole per liter of the buffer solution.
Claim 7
Dependent Claim
53 words
A process for forming a color image as claimed in claim 4, wherein the compound capable of depressing the intensifying activity of silver halide fog nuclei is present in the buffer solution in an amount of within the range of from 1×10 -3 to 5×10 -2 mole per liter of the buffer solution.
Claim 8
Dependent Claim
53 words
A process for forming a color image as claimed in claim 4, wherein the compound capable of depressing the intensifying activity of silver halide fog nuclei is selected from the group consisting of halides, azoles, heterocyclic mercapto compounds, thioether compounds, thiourea compounds, sulfur-containing amino acids, thioketo compounds, azaindenes, benzenethiosulfonic acids and benzenesulfinic acids.
Claim 9
Dependent Claim
24 words
A process for forming a color image as claimed in claim 1, wherein the buffer solution is further comprised of a fluorescent brightening agent.
Claim 10
Dependent Claim
43 words
A process for forming a color image as claimed in claim 8, wherein the fluorescent brightening agent is present in the buffer solution in an amount within the range of from 5×10 -5 to 5×10 -2 mole per liter of the buffer solution.
Claim 11
Dependent Claim
44 words
A process for forming a color image as claimed in claim 8, wherein the fluorescent brightening agent is present in the buffer solution in an amount within the range of from 1×10 -4 mole to 2×10 -2 mole per liter of the buffer solution.
Claim 12
Dependent Claim
61 words
A process for forming a color image as claimed in claim 8, wherein the fluorescent brightening agent is selected from the group consisting of diaminostilbene type, distyrylbenzene type, benzidine type, diaminocarbazole type, triazole type, imidazole, thiazole and oxazole type, imidazolone type, dihydropyridine type, coumarin and carbostyryl type, diaminodibenzothiophene dioxide type, diaminofluorene type, oxacyanine type, aminonaphthalimide type, pyrazoline type and oxadiazole type.
Claim 13
Dependent Claim
28 words
A process for forming a color image as claimed in claim 1, wherein the dilute buffer solution has a pH adjusted with the range of 2 to 5.
Claim 14
Dependent Claim
100 words
Process according to claim 1, wherein the nitrogen-containing heterocyclic compound is at least one compound selected from nigrogen-containing 5- or 6-membered heterocyclic compounds, condensed rings thereof, and nitrogen-containing heterocyclic compound represented by the following general formulae (I) and (II), respectively: ##STR8## wherein A represents a substituted or unsubstituted alkyl group, an alkenyl group, an alkinyl group, an aralkyl group, an alicyclic hydrocarbon group, or a substituted or unsubstituted aryl group; B represents a substituted or unsubstituted divalent hydrocarbon residue, X represents an anion other than ion; and Z represents non-metal atoms necessary to form a heterocyclic ring together with nitrogen.
Claim 15
Dependent Claim
18 words
Process according to claim 13, wherein B is ##STR9## and n represents an integer of 1 to 12.
Claim 16
Dependent Claim
24 words
Process according to claim 1, wherein the nitrogen-containing heterocyclic compound is at least one compound which has a mercapto group in its individual molecule.
Claim 17
Dependent Claim
152 words
Process according to claim 15, wherein the compound having the mercapto group has the following general formula: ##STR10## wherein Q represents an oxygen atom, a sulfur atom or --NR'" wherein R'" represents a hydrogen atom, an alkyl group, an unsaturated alkyl group, or a substituted or unsubstituted aryl or aralkyl group; Y and Z each represents a carbon atom or a nitrogen atom; and R 12 and R 13 each represents a hydrogen atom, an alkyl group, an unsaturated alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, --SR"" or --NH 2 wherein R"" represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkylcarboxylic acid or an alkali metal salt thereof, or an alkylsulfonic acid or alkali metal salt thereof, and when both Y and Z are carbon atoms, R 12 and R 13 may form a substituted or unsubstituted aromatic ring.
Claim 18
Dependent Claim
24 words
Process according to claim 1, wherein the nitrogen-containing heterocyclic compound is at least one compound selected from nitrobenzimidazoles, benzotriazoles, heterocyclic quaternary salts, and tetraazaindenese.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |