US4172726A
Expired / Lapsed
US
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Method for forming photographic images
Assignee: Fujifilm Holdings Corp
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Filing: 1977-08-17
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Granted: 1979-10-30
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Expires: 1997-08-17
Abstract
Abstract A method for forming images which comprises image-amplifying an image-wise exposed photographic element comprising a support having thereon at least one silver halide photographic layer containing an image-wise distributed material having a catalytic action by processing the photographic element with a solution containing (1) at least one cobalt (III) complex and (2) at least one organic phosphonic acid compound in the presence of a reducing agent.
Inventors
- 👤 Shigeru Nakamura
- 👤 Isao Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:24
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3017; G03C7/3018; Y; Y10; Y10S; Y10S430/00; Y10S430/137
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A method for forming color dye images which comprises image-amplifying an image-wise exposed photographic element, said photographic element comprising a support having thereon at least one silver halide photographic layer containing an image-wise distributed material having a catalytic action and with said photographic element containing a color dye-forming material, by processing the element with a solution containing (1) at least one cobalt (III) complex having a coordination number of 6, which comprises a cobalt atom coordinated with a ligand selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, ammonia, nitrate, nitrite, azide, chloride, thiocyanate, isothiocyanate, water, carbonate or ethlenediamine tetraacetic acid (2) 1 g to 20 g per liter of solution of at least one organic phosphonic acid compound and (3) said solution having a pH of 8 to 11, in the presence of a color developing agent selected from the group consisting of a p-phenylenediamine color developing agent and an onium salt p-aminophenol color developing agent, said color developing agent being in the amplifying solution or in a solution applied prior to the amplifying solution.
Claim 2
Independent Claim
176 words
A method for forming color dye images which comprises image-amplifying an image-wise exposed photographic element, said photographic element comprising a support having thereon at least one silver halide photographic layer containing an image-wise distributed material having a catalytic action and with said photographic element containing a color dye-forming material, by processing the element with a solution containing (1) at least one cobalt (III) complex having a coordination number of 6, which comprises a cobalt atom coordinated with a ligand selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, ammonia, nitrate, nitrite, azide, chloride, thiocyanate, isothiocyanate, water, carbonate or ethlenediamine tetraacetic acid (2) 1 g to 20 g per liter of solution of at least one organic phosphonic acid compound and (3) said solution having a pH of 8 to 11, in the presence of a color developing agent selected from the group consisting of a p-phenylenediamine color developing agent and an onium salt p-aminophenol color developing agent, said color developing agent being in the amplifying solution or in a solution applied prior to the amplifying solution.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein said cobalt (III) complex is a complex containing at least five ammine ligands. pg,42
Claim 4
Dependent Claim
245 words
The method of claim 1, wherein said organic phosphonic acid compound is a compound represented by the general formula (I): r.sub.1 n(ch.sub.2 po.sub.3 m.sub.2).sub.2 (i) wherein M represents a hydrogen atom, an alkali metal ion, an ammonium ion, a pyridinum ion, a triethanolammonium ion or a triethylammonium ion; and R 1 represents an alkyl group having 1 to 4 carbon atoms, an aryl group, an aralkyl group, an alicyclic group, a heterocyclic group, or a heterocyclic alkyl group, in which R 1 can be substituted with one or more of a hydroxy group, an alkoxy group, a halogen atom, --PO 3 M 2 , --CH 2 PO 3 M 2 or --N(CH 2 PO 3 M 2 ) 2 , wherein M has the same meaning as described above; or by the general formula (II): r.sub.2 r.sub.3 c(po.sub.3 m.sub.2).sub.2 (ii) wherein R 2 represents a hydrogen atom or an alkyl group, an aralkyl group, an acyclic group, a heterocyclic group, or a heterocyclic alkyl group defined above for R 1 , --CHR 4 --PO 3 M 2 wherein R 4 represents a hydrogen atom, a hydroxy group or an unsubstituted alkyl group or --PO 3 M 2 , wherein M is as defined above; and R 3 represents a hydrogen atom, a hydroxyl group, an alkyl group which may be substituted as described for the alkyl group for R 1 or --PO 3 M 2 , wherein M has the same meaning as described above.
Claim 5
Dependent Claim
36 words
The method of claim 1, wherein said organic phosphonic acid compound is ethylenediamine-N,N,N',N'-tetramethylene phosphonic acid, nitrilo-N,N,N-trimethylene phosphonic acid, 1,3-diaminopropanol-N,N,N',N'-tetramethylene phosphonic acid, 1,3-propanediamine-N,N,N',N'-tetramethylene phosphonic acid, 1,6-hexanediamine-N,N,N',N'-tetramethylene phosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid, 2-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1,2-triphosphonic acid or ethane-1,1-diphosphonic acid.
Claim 6
Dependent Claim
31 words
The method of claim 1, wherein said cobalt (III) complex is present in said solution in an amount of about 0.1 g to about 100 g per liter of said solution.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said developing agent is a p-phenylenediamine color developing agent.
Claim 8
Dependent Claim
16 words
The method of claim 1, wherein said image-amplifying is followed by bleaching and fixing or bleach-fixing.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |