Patent US3615508A successfully refreshed from Google Patents.
US3615508A
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Photographic blixes and blixing
Assignee: Eastman Kodak Co
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Filing: 1969-11-03
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Granted: 1971-10-26
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Expires: 1989-11-03
Abstract
Abstract Photographic blix compositions containing (a) an ammonium or amine salt of the Fe , Co , or Cu complex with a polyfunctional ligand as the silver bleaching agent, (b) an amine or an ammonium thiosulfate and (c) a salt having as a cation an ammonium ion or a water-soluble amine with an ionizable proton attached to a nitrogen atom in the amine and as an anion a sulfite ion, bisulfite ion or a metabisulfite ion either with or without (d) an amine or ammonium salt of unchelated polyfunctional ligand are advantageously prepared in concentrated stock solutions or as dry mixtures to make working blix solutions that clear silver even in high concentrations along with residual silver halides from developed silver halide emulsion layers with substantially shorter clearing times than blixes outside the invention.
Inventors
- 👤 Keith H Stephen
- 👤 John J Surash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
79 words
A photographic blix composition comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co and Cu , chelated by a polyfunctional ligand selected from those having the formulas:
Claim 2
Dependent Claim
193 words
blixing the developed photographic element by contacting it with a blix solution to remove said silver image and residual silver halide in said element to leave said dye image unobstructed, the improvement comprising blixing said developed element by contacting it with an aqueous photographic blix solution comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co , and Cu , chelated by a polyfunctional ligand; b. a thiosulfate fixing agent having a cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine; c. a salt with a cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine and with an anion that provides a source of sulfite ions.
Claim 3
Dependent Claim
177 words
blixing the developed photographic element by contacting it with a blix solution to remove said silver image and residual silver halide in said element to leave said dye image unobstructed, the improvement comprising blixing said developed element by contacting it with an aqueous photographic blix solution comprising: a. ammonium ethylenedinitrilotetraacetato ferrate (III) at a concentration in the range of from about 0.01 mole per liter to about 1.0 mole per liter of said blix solution, b. ammonium thiosulfate at a concentration in the range of from about 0.01 mole per liter to about 5.0 moles per liter of said blix solution, c. ammonium sulfite at a concentration in the range of from about 0.001 mole per liter to about 1.0 mole per liter of said blix solution, d. ethylenedinitrilotetraacetate tetraammonium salt at a concentration in the range of from about 0.001 mole per liter to about 0.1 mole per liter of said blix solution, and e. sufficient ammonium hydroxide to adjust the pH of said blix solution in the range of from about 5 to about 7.
Claim 4
Dependent Claim
79 words
A photographic blix composition comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co and Cu , chelated by a polyfunctional ligand selected from those having the formulas:
Claim 5
Dependent Claim
79 words
A photographic blix composition comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co and Cu , chelated by a polyfunctional ligand selected from those having the formulas:
Claim 6
Dependent Claim
58 words
A blix composition of claim 2 containing in addition to (a), (b) and (c) described therein, d. a salt having a cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom of said amine and an anion from said polyfunctional ligand described in (a).
Claim 7
Dependent Claim
14 words
A blix composition of claim 1 in which the polyfunctional ligand is ethylenediaminetetraacetic acid.
Claim 8
Dependent Claim
14 words
A blix composition of claim 1 in which the polyfunctional ligand is diethylenetrinitrilopentaacetic acid.
Claim 9
Dependent Claim
14 words
A blix composition of claim 1 in which the polyfunctional ligand is 1,2-cyclohexanediaminetetraacetic acid.
Claim 10
Dependent Claim
83 words
A photographic blix composition comprising: a. sufficient ammonium ethylenedinitrilotetraacetato ferrate (III) to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 1.0 mole per liter, b. sufficient ammonium thiosulfate to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 5.0 moles per liter, and c. sufficient ammonium sulfite to produce, when dissolved in water, a solution containing from about 0.001 mole per liter to about 2.0 moles per liter.
Claim 11
Dependent Claim
60 words
A blix composition of claim 9 containing, in addition to (a), (b) and (c), sufficient ethylenedinItrilotetraacetate tetraammonium salt to produce, when dissolved in water, a solution containing from about 0.001 mole per liter to about 0.1 mole per liter and sufficient ammonium hydroxide to produce a blix solution having a pH in the range from about 5 to about 7.
Claim 12
Dependent Claim
83 words
A photographic blix composition comprising: a. sufficient ammonium ethylenedinitrilotetraacetato cobaltate (III) to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 1.0 moles per liter, b. sufficient ammonium thiosulfate to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 5.0 moles per liter, and c. sufficient ammonium sulfite to produce, when dissolved in water, a solution containing from about 0.00l mole per liter to about 2.0 moles per liter.
Claim 13
Dependent Claim
83 words
A photographic blix composition comprising: a. sufficient ammonium ethylenedinitrilotetraacetato cuprate (II) to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 1.0 mole per liter, b. sufficient ammonium thiosulfate to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 5.0 moles per liter, and c. sufficient ammonium sulfite to produce, when dissolved in water, a solution containing from about 0.001 mole per liter to about 2.0 moles per liter.
Claim 14
Dependent Claim
85 words
A photographic blix composition comprising: a. sufficient tris (hydroxyethyl) ammonium ethylenedinitrilotetraaceto ferrate (III) to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 1.0 mole per liter, b. sufficient ammonium thiosulfate to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 5.0 moles per liter, and c. sufficient ammonium sulfite to produce, when dissolved in water, a solution containing from about 0.001 mole per liter to about 2.0 moles per liter.
Claim 15
Dependent Claim
83 words
A photographic blix composition comprising: a. sufficient ammonium diethylenetrinitrilopentaacetato ferrate (III) to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 1.0 mole per liter, b. sufficient ammonium thiosulfate to produce, when dissolved in water, a solution containing from about 0.01 mole per liter to about 5.0 moles per liter, and c. sufficient ammonium sulfite to produce, when dissolved in water, a solution containing from about 0.001 mole per liter to about 2.0 moles per liter.
Claim 16
Dependent Claim
226 words
A composition comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co and Cu , chelated by a polyfunctional ligand; b. a salt with a cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom of said organic amine, and with an anion from said polyfunctional ligand; and c. a base selected from the class consisting of ammonium hydroxide and a water-soluble amine; said composition containing a sufficient amount of (a) and (b) to produce, when dissolved in water, a concentrated stock solution containing from about 0.3 mole per liter to about 2 moles per liter of (a), and from about 0.05 per liter to about 0.5 mole per liter of (b) and a sufficient amount of (c) to adjust the pH of the said concentrated stock solution in the range of from about 6.5 to about 8.5, said concentrated stock solution being added to a solution containing ammonium thioSulfate to form a solution for blixing silver in developed photographic elements.
Claim 17
Dependent Claim
77 words
A composition comprising: a. a bleaching agent for silver that is a salt with an unchelated cation selected from the class consisting of an ammonium ion and a water-soluble organic amine having an ionizable proton attached to a nitrogen atom in said amine, and with an anion that is a complex of a metal selected from the class consisting of Fe , Co and Cu , chelated by a polyfunctional ligand selected from those having the formulas:
Claim 18
Dependent Claim
28 words
A composition of claim 15 in which said cations in said salts of (a) and (b) are ammonium ions and the base of said (c) is ammonium hydroxide.
Claim 19
Dependent Claim
15 words
A composition of claim 15 in which said metal ion in (a) is Fe .
Claim 20
Dependent Claim
16 words
A composition of claim 15 in which said polyfunctional ligand in (a) is ethylenediamine tetraacetic acid.
Claim 21
Dependent Claim
122 words
A composition comprising: a. a sufficient amount of ammonium ethylenedinitrilotetraacetato ferrate (III) to produce, when dissolved in water, a concentrated stock solution containing from about 0.3 mole per liter to about 2. moles of (a) per liter; b. a sufficient amount of ethylenedinitrilotetraacetic acid tetra ammonium salt to produce, when dissolved in water, a concentrated stock solution containing from about 0.05 mole per liter to about 0.5 mole of (b) per liter; and c. a sufficient amount of ammonium hydroxide to adjust the pH of said concentrated stock solution in the range of from about 6.5 to about 10.; said concentrated stock solution being added to a solution containing ammonium thiosulfate to form a solution for blixing silver in developed photographic elements.
Claim 22
Dependent Claim
8 words
In a photographic color process comprising the steps:
Claim 23
Dependent Claim
8 words
In a photographic color process comprising the steps:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |