Stabilizer-preservative Patents (Class 430/490)
  • Patent number: 6998227
    Abstract: An aqueous, homogeneous, single-part color developing concentrate comprises a color developing agent in free base form and an organic antioxidant. The concentrate also includes a water-miscible or water-soluble organic co-solvent and a quaternary ammonium salt to enhance its stability. The concentrate can be used to make a working strength processing solution, or it can be used as a replenishing composition with proper dilution, and is particularly useful for processing color negative or color reversal photographic silver halide films.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: February 14, 2006
    Assignee: Eastman Kodak Company
    Inventors: Michael P. Youngblood, Thomas E. Lowe, Terrence R. O'Toole, Charles M. Darmon
  • Patent number: 6902876
    Abstract: A color developer concentrate composition is disclosed, comprising a color developing agent, a sulfite and a compound represented by formula (1), the color developing agent concentration 0.02 to 0.2 mol/l and the sulfite concentration meeting the following requirement: 0.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: June 7, 2005
    Assignee: Konica Corporation
    Inventor: Atsuro Yanata
  • Patent number: 6884572
    Abstract: A concentrated color developer composition packed in a container which is comprised of material exhibiting an oxygen permeability of not more than 50 ml/(m2·day·atm), and the concentrated color developer composition comprising a hydroxyalkyl-substituted p-phenediamine type color developing agent of not less than 0.05 mol/l, a sulfite and a hydroxylamine salt. The processing method by use of the concentrated composition is also disclosed.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: April 26, 2005
    Assignee: Konica Corporation
    Inventors: Wataru Satake, Atsuro Yanata
  • Patent number: 6838230
    Abstract: A method is provided that is suitable fur use in processing a digitally exposed translucent or transparent display material. The method includes exposing a translucent or transparent material to light emitted from a light source. The material contains at least one silver halide having a silver content of at least about 1 g/m2 based on the area of the material. The method also includes contacting the material with a color developer solution comprising at least one color developing agent and a compound having the following formula (I): in which each of a and b independently represents 1 to 4, and in which each of X and Y independently represents a hydrogen, sodium or potassium atom. The duration of the step (b) is from about 60 to about 180 seconds.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: January 4, 2005
    Assignee: Fuji Hunt Photographic Chemicals, Inc.
    Inventors: Hai-xing Wan, Robert S. Harvey
  • Patent number: 6830878
    Abstract: The present invention relates to a developer comprising a developing agent and a polyalkyleneimine antioxidant being formed by the condensation of a number of alkyleneimine units and having the following formula (I): wherein R1, R2 and R3 independently represent an unsubstituted or substituted alkylene group or R2 may be H; x and y independently represent an integer from 1 to 39,999; the sum of x and y represents an integer from 10 to 40,000; and wherein the amine groups of the antioxidant have been partially oxidized with hydrogen peroxide or a compound capable of generating hydrogen peroxide, prior to the introduction of the developing agent. In a preferred embodiment, the antioxidant has been partially oxidized such that the amount of hydroxylammonium groups formed is less than half the total equivalent of the original amine before the addition of the developing agent. The developer may optionally comprise an alkaline buffer.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: December 14, 2004
    Assignee: Eastman Kodak Company
    Inventor: John R. Fyson
  • Publication number: 20040121271
    Abstract: The present invention relates to a developer comprising a developing agent and a polyalkyleneimine antioxidant being formed by the condensation of a number of alkyleneimine units and having the following formula (I): 1
    Type: Application
    Filed: October 29, 2003
    Publication date: June 24, 2004
    Applicant: Eastman Kodak Company
    Inventor: John R. Fyson
  • Publication number: 20040023168
    Abstract: A single-part colour developing concentrate with a pH greater than or equal to 7 which contains at least 0.02 mol of a colour developer substance and at least 0.015 mol of an antioxidant per litre, characterised in that the concentrate contains 0.05 to 35 g per litre of a wetting agent soluble in water in this amount, is distinguished by very good stability in storage at low temperatures and the discharge behaviour from the concentrate bottle is considerably improved and soiling of the processing equipment is avoided. Furthermore, the optical brightener precipitation occurring in practice in the bleach fixing bath is also prevented.
    Type: Application
    Filed: July 18, 2003
    Publication date: February 5, 2004
    Applicant: Agfa-Gevaert
    Inventors: Ralf Wichmann, Frank Dovecar
  • Patent number: 6673528
    Abstract: A black-and-white photographic developing composition has improved stability and is more compatible with the environment when discarded. The composition includes one or more ascorbic acid developing agents and is essentially free of hydroquinone and similar developing agents. It comprises a mono- or disaccharide such as ribose, fructose, lactose, glucose or galactose as a stabilizing agent for the developing agent.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: January 6, 2004
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Jacques Roussilhe
  • Patent number: 6673527
    Abstract: A color developer solution capable of inhibiting precipitation or tar-staining occurring in the processing tank or the roller rack, even when being processed rapidly or at low replenishing rate and a concentrated composition thereof is disclosed, comprising at least one selected from specified N-disubstituted hydroxylamine derivatives and at least one selected from specified N-monosubstituted hydroxylamine derivatives in a molar ratio falling within the range of 1000:1 to 1:1.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: January 6, 2004
    Assignee: Konica Corporation
    Inventor: Hiroshi Yamashita
  • Patent number: 6664035
    Abstract: A method for providing a color image in an exposed color negative silver bromoiodide film element comprising contacting said element with an aqueous color developing composition having a pH of 9.0 to 12.0 and comprising a color developing agent, sulfite ion and an additional antioxidant wherein the color developing agent/sulfite ion molar ratio is less than 10:1 and greater than 0.55:1, and the sulfite ion/antioxidant molar ratio is less than 4.35:1 and greater than 0.25:1.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: December 16, 2003
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne Haye, Robert A. Arcus, Janet M. Huston
  • Patent number: 6623915
    Abstract: Concentrated and working strength photographic color developing compositions are stabilized with the inclusion of a sulfur compound as a preservative for a color developing agent. The preservative can be represented by one of the following Structures I, II, III, and IV: M1S—R—CH(NH2)—COOM2   (I) M1S—R1—COOM2   (II) R2—S—S—R2   (III) R3HN—R4—SM1   (IV) wherein R is a divalent aliphatic linking group having at least 1 carbon atom in the chain, R1 is phenylene or an unsubstituted alkylene having 1 or 2 carbon atoms, R2 is a monovalent aliphatic group having at least 2 carbon atoms and comprising a —CH(NHR3)—COOM2 or —(C1-C3)alkylene-CH(NHR3)—COOM2 group, R3 is hydrogen, an alkyl group having 1 to 3 carbon atoms or phenyl, R4 is an alkylene group, a cyclohexylene group, or a phenylene group, and M1 and M2 are independently hydrogen, an alkali metal or ammonium ion or methyl group.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: September 23, 2003
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Publication number: 20030152876
    Abstract: A black-and-white photographic developing composition has improved stability and is more compatible with the environment when discarded. The composition includes one or more ascorbic acid developing agents and is essentially free of hydroquinone and similar developing agents. It comprises a mono- or disaccharide such as ribose, fructose, lactose, glucose or galactose as a stabilizing agent for the developing agent.
    Type: Application
    Filed: January 23, 2003
    Publication date: August 14, 2003
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Jacques Roussilhe
  • Patent number: 6605421
    Abstract: An aqueous solution comprising a hydroxylamine salt in an amount of 18 to 35 weight-%, wherein the aqueous solution further comprises at least one compound selected from the group consisting of amino polycarboxylic acids and compounds represented by the general Formulas [1] to [6] in an amount of 1 to 30 weight-%, and pH of the aqueous solution is within the range of from 2 to 6.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: August 12, 2003
    Assignee: Konica Corporation
    Inventors: Satoru Kuse, Hiroshi Yamashita
  • Patent number: 6599688
    Abstract: Concentrated and working strength photographic color developing compositions are stabilized with the inclusion of an &agr;-ketocarboxylic acid or salt thereof, such as pyruvic acid or a salt thereof. These compositions can be used to process color photographic materials.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: July 29, 2003
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Publication number: 20030134235
    Abstract: An amplified color developing composition is stabilized with a cyclicaminomethanediphosphonic acid or salt thereof alone of in combination with other stabilizing compounds. This composition also comprises a color developing agent, a redox oxidizing agent (such as hydrogen peroxide), and a hydroxylamine antioxidant for the color developing agent. The amplified color developing composition can be formulated using a two- or three-part processing kit. The composition can be used to provide images in various color photographic silver halide materials such as color photographic papers.
    Type: Application
    Filed: November 1, 2002
    Publication date: July 17, 2003
    Applicant: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Richard R. Horn, Anthony Jarkowski
  • Patent number: 6573035
    Abstract: A multi-part (two-part or three-part) color developing kit includes aqueous solutions containing sulfite ions and a color developing agent. An &agr;-ketocarboxylic acid or salt thereof, such as pyruvic acid or a salt thereof, is included in one or more of the aqueous solutions. These solutions can be combined, with or without dilution, to provide a color developing composition that can be used to process color photographic materials.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: June 3, 2003
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Publication number: 20030082490
    Abstract: Rapid development of silver bromoiodide color negative photographic films and formation of high quality negative images suitable for scanning to produce display images of excellent quality is made possible by a novel developer solution composition and method of development. The solution is characterized by containing, in addition to the color developer compound and conventional photographic developer solution components, a water soluble pyrrolidone polymer, a high concentration of sulfite ion and a low concentration, or the absence of, bromide ion. In the novel method the developer composition contacts the exposed film at elevated temperature, e.g., 40 to 66° C., for a short development time, e.g., 20 to 90 seconds. The developed image has image quality suitable for scanning and digital manipulation to produce a digital record for forming a color display image of high quality.
    Type: Application
    Filed: May 20, 2002
    Publication date: May 1, 2003
    Inventors: Robert A. Arcus, Peter N. Bacel, John A. Weldy
  • Patent number: 6548235
    Abstract: A stabilized solution of an alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methanesulfonylaminoethyl)-2-methyl-p-phenylenediamine includes from about 10 to 40 weight percent of an alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine; from about 30 to 70 weight percent of at least one photographically inactive water-miscible or water-soluble hydroxy-containing, organic solvent of the alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine; from about 5 to 40 weight percent water; and from about 1 to 40 weight percent of a preservative for the alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine, wherein the weight percentages are based on the total weight of the stabilized solution. Another aspect of the invention are processes for making stabilized p-phenylenediamine color developer solutions.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: April 15, 2003
    Assignee: Eastman Chemical Company
    Inventor: Phillip Montgomery Hudnall
  • Publication number: 20030068588
    Abstract: An aqueous solution comprising a hydroxylamine salt in an amount of 18 to 35 weight-%, wherein the aqueous solution further comprises at least one compound selected from the group consisting of amino polycarboxylic acids and compounds represented by the general Formulas [1] to [6] in an amount of 1 to 30 weight-%, and pH of the aqueous solution is within the range of from 2 to 6.
    Type: Application
    Filed: March 25, 2002
    Publication date: April 10, 2003
    Inventors: Satoru Kuse, Hiroshi Yamashita
  • Patent number: 6541191
    Abstract: A photographic aqueous processing solution containing at least one solid compound that has a maximum solubility therein corresponding to a desired operating level, which solution is kept in equilibrium with the solid form of the compound, thus maintaining its concentration at the desired level without the need for a replenishing system.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: April 1, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter Jeffery Twist, John Demita Goddard
  • Patent number: 6520693
    Abstract: A method of providing photoprocessing services utilizes a packaging system in which photoprocessing solutions are distributed from a source of manufacture to a photofinishing site. The packaging system includes a rigid or semi-rigid outer container and at least one internal container. The internal container includes the processing solution, and can be made of a rigid or flexible material. The internal container may be separable from the outer container or may be in the form of an internal compartment that is integral with the outer container. As an option, the outer container can house a further container that is designed to collect waste or spent solution from the photoprocessing site. With the system of the present invention, a designated supplier entity can follow the packaging system through an entire usage cycle of the system.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: February 18, 2003
    Assignee: Eastman Kodak Company
    Inventors: Lloyd A. Lobo, Jeffrey L. Hall, Robert B. Call, Jay E. Mathewson, Donna M. Timmons
  • Publication number: 20020150845
    Abstract: Photographic developer replenisher concentrates comprising more reactive developers, like 4(N-ethyl-N-2-hydroxyethyl)-2 -methylphenylenediamine (CD-4) undergo rapid oxidation, and consequently, have shorten shelf-life stabilities. Hydroxylamine type derivatives, while disclosed as being useful as a class of antioxidants for stabilizing photographic developer replenishers, most were found to impart either inadequate shelf-life stability for CD-4 developer, or interfered with “satisfactory developer performance.” Surprisingly, it was discovered the shelf-life stability of replenisher concentrates comprising CD-4 photographic developer could be extended for periods of 2 years or longer, and also provide satisfactory developer performance when the hydroxylamine antioxidant comprises at least N,N-bis(2 -sulfoethyl) hydroxylamine (SEHA) or a salt thereof.
    Type: Application
    Filed: February 5, 2002
    Publication date: October 17, 2002
    Inventor: Laszlo Papai
  • Publication number: 20020146652
    Abstract: A concentrated black-and-white photographic developing composition has improved stability, is compatible with the environment and provides desired sensitometric properties with a combination of particular antifoggants. These antifoggants include a mercapto-substituted tetrazole and a benzimidazole that has one or more electron withdrawing groups. This concentrated composition can be used as a first “part” and mixed, upon dilution, with a diluted second “part” that is a concentrated composition of a gelatin hardening agent. When mixed together, the two diluted concentrates form a working strength developing composition that can be used to provide black-and-white images in various photographic silver halide materials, and particularly in radiographic films.
    Type: Application
    Filed: January 24, 2001
    Publication date: October 10, 2002
    Applicant: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Joan F. Rachel
  • Patent number: 6444414
    Abstract: A black-and-white photographic developing composition has improved stability and is more compatible with the environment when discarded. The composition includes one or more ascorbic acid developing agents and a preservative (such as a sulfite) and is essentially free of hydroquinone and similar developing agents. Improved stability is provided using a sulfo-substituted organic compound as a stabilizing agent. Such compounds are either aliphatic sulfo compounds or hydroxy-free aromatic sulfo compounds.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: September 3, 2002
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston, John S. Badger, Jacques Roussilhe
  • Patent number: 6410215
    Abstract: Silver bromoiodide color negative films can be rapidly color developed using stabilized color developer solutions kept at high temperatures with minimal changes in the resulting color record densities. The compositions are stabilized by adjusting or maintaining the pH to 9 or more, but below 10.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: June 25, 2002
    Assignee: Eastman Kodak Company
    Inventor: David Leroy Cole
  • Patent number: 6406838
    Abstract: The present invention provides an overcoat for a photographic element that allows for appropriate diffusion of photographic processing solutions. The overcoat comprises 10 to 50% by weight of a enzyme-degradable biopolymer and 50 to 90% by weight of hydrophobic particles (by weight of dry laydown of the entire overcoat). An enzyme is applied to the element before, during, or after conventional photoprocessing. According to one embodiment of the invention, the photographic element can be exposed and processed using normal photofinishing equipment, with no modifications, to provide an imaged element together with a protective, water-resistant layer.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: June 18, 2002
    Assignee: Eastman Kodak Company
    Inventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
  • Publication number: 20020072018
    Abstract: A stabilized solution of an alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methanesulfonylaminoethyl)-2-methyl-p-phenylenediamine includes from about 10 to 40 weight percent of an alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine; from about 30 to 70 weight percent of at least one photographically inactive water-miscible or water-soluble hydroxy-containing, organic solvent of the alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine; from about 5 to 40 weight percent water; and from about 1 to 40 weight percent of a preservative for the alkali metal or alkaline earth metal salt of N-ethyl-N-2-(methane sulfonylaminoethyl)-2-methyl-p-phenylene-diamine, wherein the weight percentages are based on the total weight of the stabilized solution. Another aspect of the invention are processes for making stabilized p-phenylenediamine color developer solutions.
    Type: Application
    Filed: October 18, 2001
    Publication date: June 13, 2002
    Inventor: Phillip Montgomery Hudnall
  • Publication number: 20020072017
    Abstract: A stabilized p-phenylenediamine color developer solution having about 10 to 40 weight percent of a p-phenylenediamine free base color developer, about 40 to 70 weight percent of a hydroxy-containing organic solvent for the p-phenylenediamine free base color developer, and about 1 to 40 weight percent of a preservative for the p-phenylenediamine free base color developer, wherein the weight percentages are based on the total weight of the stabilized solution. Another aspect are processes for making stabilized p-phenylenediamine color developer solutions.
    Type: Application
    Filed: October 18, 2001
    Publication date: June 13, 2002
    Inventor: Phillip Montgomery Hudnall
  • Publication number: 20020061476
    Abstract: The present invention provides an overcoat for a photographic element that allows for appropriate diffusion of photographic processing solutions. The overcoat comprises 10 to 50% by weight of a enzyme-degradable biopolymer and 50 to 90% by weight of hydrophobic particles (by weight of dry laydown of the entire overcoat). An enzyme is applied to the element before, during, or after conventional photoprocessing. According to one embodiment of the invention, the photographic element can be exposed and processed using normal photofinishing equipment, with no modifications, to provide an imaged element together with a protective, water-resistant layer.
    Type: Application
    Filed: July 3, 2001
    Publication date: May 23, 2002
    Inventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
  • Publication number: 20020061474
    Abstract: Concentrated aqueous photographic color developing compositions include a photographic color developing agent in free base form and a compound represented by Structure I 1
    Type: Application
    Filed: June 29, 2001
    Publication date: May 23, 2002
    Applicant: Eastman Kodak Company
    Inventors: Jean M. Buongiorne, Ramanuj Goswami, Mary E. Craver
  • Publication number: 20010055734
    Abstract: A concentrated aqueous solution of a p-phenylenediamine derivative, which a) has a pH higher than 12.5, b) contains 0.4 to 1.1 mol p-phenylenediamine derivative/litre, c) contains 0.05 to 2 mol of an antioxidant/litre, d) contains at most 35% by weight of organic solvents with respect to the total solution, e) contains at most 50 mmol sulphate ions/litre and f) is single-phase, is suitable for the production of different colour developer formulations.
    Type: Application
    Filed: May 14, 2001
    Publication date: December 27, 2001
    Inventors: Gustav Tappe, Wolfgang Korner, Gerhard Schmid
  • Publication number: 20010036605
    Abstract: A two-part color photographic developer concentrate in which part 1 contains at least one antioxidant selected from the group consisting of diethylhydroxylamine and diethylhydroxylamine disulfo acid, at least one auxiliary solvent, at least one optical brightener and at least one color developer substance and part 2 contains at least one buffer substance, alkali and at least one water softener, may be produced by part 1 additionally containing 0.001 to 1 mol of hydroxylamine or a monoalkylated hydroxylamine or the salts thereof per liter of concentrate concentrate and at least 20% by weight of the total of part 1 being water.
    Type: Application
    Filed: June 7, 2001
    Publication date: November 1, 2001
    Inventors: Gustav Tappe, Matthias Porger
  • Publication number: 20010031432
    Abstract: A processing composition for a silver halide photographic material, which comprises at least one compound selected from the group consisting of compounds represented by the following general formulae (I) and (II): 1
    Type: Application
    Filed: January 29, 2001
    Publication date: October 18, 2001
    Inventors: Yasufumi Nakai, Keizo Kimura, Shigeaki Tanaka, Yoshiharu Yabuki
  • Publication number: 20010026909
    Abstract: A multi-part color developing kit includes at least two parts (or solutions) of photochemical compositions that can be mixed to provide a color developing composition useful for obtaining color photographic images. A first aqueous solution is formulated with a color developing agent in free base form, an antioxidant for the color developing agent, an inorganic base, a triazinylstilbene optical brightening agent, an chemical base and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent. A second aqueous solution is formulated with a buffering agent, the same or different chemical base and a phosphonic acid metal ion sequestering agent. Both solutions have a pH and homogeneity to provide a clear color developing composition that is safer for use and disposal.
    Type: Application
    Filed: May 9, 2001
    Publication date: October 4, 2001
    Inventors: Jean M. Buongiorne, Charles M. Darmon, Michael J. Haight, Erika S. McLarney, Barry C. Kocher, Sheridan E. Vincent, Charles S. Christ
  • Publication number: 20010026910
    Abstract: A multi-part color developing kit includes at least two parts (or solutions) of photochemical compositions that can be mixed to provide a color developing composition useful for obtaining color photographic images. A first aqueous solution is formulated with a color developing agent in free base form, an antioxidant for the color developing agent, an inorganic base, a triazinylstilbene optical brightening agent, an chemical base and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent. A second aqueous solution is formulated with a buffering agent, the same or different chemical base and a phosphonic acid metal ion sequestering agent. Both solutions have a pH and homogeneity to provide a clear color developing composition that is safer for use and disposal.
    Type: Application
    Filed: May 21, 2001
    Publication date: October 4, 2001
    Inventors: Jean M. Buongiorne, Charles M. Darmon, Michael J. Haight, Erika S. McLarney, Barry C. Kocher, Sheridan E. Vincent, Charles S. Christ
  • Patent number: 6251574
    Abstract: A one-part, multi-phase colour developer concentrate having an aqueous phase and an organic phase, wherein the organic phase is constituted by a carboxylic acid amide or urea derivative which is liquid at room temperature and the concentrate contains at least one compound of the formulae (I), (II) or (III) as antioxidant: in which R1 means alkyl, R2 means alkyl or aryl and n means 0 or 1 and at least one of the residues R1 and R2 contains at least one —OH, —COOH or —SO3H group; in which R3 means an alkyl or acyl group; in which R4 means an alkylene group optionally interrupted by O atoms and m means a number of at least 2, is in particular suitable for the production of a colour developer solution for silver halide materials having an elevated AgCl content.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: June 26, 2001
    Assignee: Agfa-Gevaert
    Inventor: Thomas Hübsch
  • Patent number: 6228567
    Abstract: A homogeneous color developing concentrate comprises a color developing agent in free base form, an antioxidant for the color developing agent and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent. This concentrate is prepared in a unique manner, namely by combining the noted components and removing the sulfate anions commonly present in color developing agents by precipitation with alkali metal ions. The concentrate can be used to prepare photographic processing concentrates and working strength solutions.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: May 8, 2001
    Assignee: Eastman Kodak Company
    Inventors: Charles M. Darmon, Jean M. Buongiorne, Michael J. Haight, Paul A. Schwartz
  • Patent number: 6190845
    Abstract: A process and a composition is described of a color developing agent for processing a silver halide color photographic material, the composition containing a paraphenylenediamine type color developing agent and an amine of formula (I) or a salt thereof R1NR2R3  (I) wherein R1 and R2 are independently selected from alkyls, phenyls, hydrogen, and substituted derivatives thereof, such substituents including hydroxyl, alkoxyl, amide, sulfoneaminde and alkyl sulfoneamide groups, and R3 represents an aromatic such as phenyl or naphthyl and substituents thereof. When used in highly concentrated solutions, the compositions are capable of preventing the precipitation of the color developer agent.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: February 20, 2001
    Assignee: Chugai Phote Chemical Co., LTD
    Inventor: Nobuki Sigemori
  • Patent number: 6159670
    Abstract: A homogeneous, ready to use, single-part color developing concentrate comprises a color developing agent in free base form, an antioxidant for the color developing agent, a buffering agent, and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent present in an a concentration such that the weight ratio of water to the organic solvent is from about 15:85 to about 50:50. In addition the concentrate includes a mixture of a specific polyaminopolyphosphonic acid and either a hydroxyalkylidenediphosphonic acid or morpholinomethanediphosphonic acid (or salt thereof) for stability in the presence of calcium ions. This concentrate is prepared by mixing the components in a unique order for improved safety and manufacturability. It can be used to make a working strength processing solution, or it can be used as a replenishing composition with proper dilution to provide color images in photographic silver halide materials.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: December 12, 2000
    Assignee: Eastman Kodak Company
    Inventors: Jean M. Buongiorne, Michael J. Haight
  • Patent number: 6136518
    Abstract: A multi-part color developing kit includes at least two parts (or solutions) of photochemical compositions that can be mixed to provide a color developing composition useful for obtaining color photographic images. A first aqueous solution is formulated with a color developing agent in free base form, an antioxidant for the color developing agent, an inorganic base, a triazinylstilbene optical brightening agent, an chemical base and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent. A second aqueous solution is formulated with a buffering agent, the same or different chemical base and a phosphonic acid metal ion sequestering agent. Both solutions have a pH and homogeneity to provide a clear color developing composition that is safer for use and disposal.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: October 24, 2000
    Assignee: Eastman Kodak Company
    Inventors: Jean M. Buongiorne, Charles M. Darmon, Michael J. Haight, Erika S. McLarney, Barry C. Kocher, Sheridan E. Vincent, Charles S. Christ, Jr.
  • Patent number: 6096488
    Abstract: Processing a silver halide color photographic material comprising color developing, desilvering and water washing and/or stabilizing. In this process, a photographic material which has at least one emulsion layer containing a high silver chloride content, and at least one emulsion layer containing a monodisperse emulsion, is continuously processed with a color developing solution containing a water-soluble high polymer compound. The coated amount of silver in the photographic material is preferably 0.75 g/m.sup.2 or less. The color developing solution preferably has a chloride ion content of 0.035 mol/l or more. The water soluble high polymer compound can be a polyester, polyamide, polyurethane, polyether, polycarbonate or a natural high polymer compound, or their derivatives. It is obtained by polymerizing or copolymerizing a monomer containing a copolymerizable ethylene type unsaturated group. The high polymer compound is preferably added in the amount of 0.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: August 1, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Kazuaki Yoshida, Hiroshi Fujimoto, Junichi Yamanouchi, Tomokazu Yasuda
  • Patent number: 6077652
    Abstract: A photographic developer which is improved in storage stability is disclosed, comprising a developing agent represented by formula (1) and a compound represented by formula (2). ##STR1## wherein R.sub.1 are ##STR2## R.sub.2 and R.sub.3 independently are a hydrogen atom or an alkaline metal atom;formula (2)M.sub.n HAO.sub.3wherein M is a univalent or bivalent atom and A is an atom of the 5B group of the periodic table, except for N.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: June 20, 2000
    Assignee: Konica Corporation
    Inventor: Yuji Hosoi
  • Patent number: 6077653
    Abstract: Certain 1,4-cyclohexanediones are useful as antioxidants in photographic developing compositions. These compounds stabilize the compositions, are water soluble and are essentially odorless. These antioxidants can be used in either black and white or color developing compositions used to process photographic silver halide materials.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: June 20, 2000
    Assignee: Eastman Kodak Company
    Inventors: Lynda W. McGarry, Tiecheng A. Qiao
  • Patent number: 6071679
    Abstract: As it has been described above, a color developing agent composition according to the invention, which includes a compound given by Formula (I) ##STR1## wherein R.sub.1 through R.sub.6 are substituents respectively and independently are selected from the group consisting of a hydrogen atom or any substituted or unsubstituted group selected from among an alkyl group, an alkoxyl group, a hydroxyl group and an amino group, possible substitution groups for the selected group comprising a hydroxyl group, an amino group and an alkoxyl group; (2) a paraphenylene diamine type color developing agent; and (3) a compound given by Formula (II) ##STR2## wherein R.sub.7 and R.sub.8 are substituents respectively and independently selected from the group consisting of a hydrogen atom or a substituted or an unsubstituted alkyl group.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: June 6, 2000
    Inventors: Nobuki Sigemori, Masako Sekiya
  • Patent number: 6037111
    Abstract: A photographic color developing composition includes a color developing agent, an organic antioxidant and at least 0.0005 mol/l of a polyaminopolyphosphonic acid calcium ion sequestering agent that has at least four phosphonic acid (or salt) groups. In addition, the total concentration of lithium and magnesium ions is less than 0.0001 mol/l. This composition can be in working strength or concentrated form (including solids), and has improved stability and reduced precipitates, and in some cases, provides improved yellow dye density.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: March 14, 2000
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Patent number: 6017687
    Abstract: An aqueous, homogeneous, single-part, chloride ion-free color developing concentrate comprises a color developing agent in free base form, an antioxidant for the color developing agent, a buffering agent, and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent present in an a concentration such that the weight ratio of water to the organic solvent is from about 15:85 to about 50:50. Upon dilution at least four times, this composition can be used to provide a color developing composition for processing photographic color papers. The same concentrate can also be diluted to provide a replenisher for the color developing composition that is used at a replenishment rate of from about 50 to about 150 ml/m.sup.2 of processed color paper.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: January 25, 2000
    Assignee: Eastman Kodak Company
    Inventors: Charles M. Darmon, Paul A. Schwartz, Charles S. Christ
  • Patent number: 6010835
    Abstract: This invention relates to a 3-part kit preparing for a photographic developing bath for the processing of color photographic materials. The kit of this invention affords an efficient ready-to-use developing solution.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: January 4, 2000
    Assignee: Eastman Kodak Company
    Inventors: Francoise M. Thomas, Philippe Strauel, Claude G. Goumont
  • Patent number: 6010819
    Abstract: A method for improving light fastness of an image, which comprises releasing or forming an image forming dye or a precursor thereof corresponding or counter-corresponding to silver development and allowing an image formed by transferring said image forming dye or precursor thereof to coexist with a compound represented by general formula (I) in an image forming material ##STR1## The symbols in formula (I) are defined in the description. Also disclosed is an image forming material for use in the method.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: January 4, 2000
    Assignee: Fuji Photo Film., Ltd.
    Inventors: Hiroshi Arakatsu, Nobuo Seto, Yoshisada Nakamura, Hironori Hiyoshi, Hiroyuki Watanabe, Takayoshi Kamio
  • Patent number: 5998112
    Abstract: A photographic developer composition is disclosed, comprising a reductone, as a developing agent and a compound represented by the following formula (1). The reductone is a compound represented by following formula (A). The processing method by use of the developer composition is also disclosed.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: December 7, 1999
    Assignee: Konica Corporation
    Inventor: Hirobumi Yamashita
  • Patent number: 5994039
    Abstract: Black-and-white elements, such as radiographic films, can be processed rapidly using a black-and-white developing composition containing a hydroquinone developing agent, and specific amounts of sulfite and borate ions. Thus, the molar ratio of sulfite ions to borate ions is less than 20:1, and the molar ratio of sulfite ions to the hydroquinone developing agent is from about 1:1 to about 2.5:1. The developing composition is effective, rapid and stable.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: November 30, 1999
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Shirleyanne E. Haye, Janet M. Huston, Joan F. Rachel