Bleach Or Intensification Patents (Class 430/461)
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Publication number: 20080050681Abstract: Aimed at improving balance between refractive index and absorbance of an immersion fluid used for light exposure based on the immersion method, the immersion fluid is configured as containing a deuterated dialkyl sulfoxide.Type: ApplicationFiled: August 24, 2007Publication date: February 28, 2008Applicant: NEC ELECTRONICS CORPORATIONInventor: Toshirou Itani
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Patent number: 7108962Abstract: A photographic processing composition, containing at least one compound of formula (I) or (II): A1-X-L-Y-A2??(I) wherein A1 and A2 each are a specific aryl or aromatic heterocyclic group; L is a specific arylene or divalent aromatic heterocyclic group; X and Y each are a specific divalent group; the compound of (I) contains at least two of —SO3M or —CO2M, but not contains —N?N— or —SH; M is a hydrogen, alkali or alkali earth metal, ammonium, or pyridinium; wherein A11 is a specific tri- or tetra-valent aromatic hydrocarbon or aromatic heterocyclic group; A12 is an aryl or aromatic heterocyclic group; X1 is a divalent group; M1 is a hydrogen, alkali or alkali earth metal, ammonium, or pyridinium; the molecule of (II) does not contain —N?N— or —SH; n is 3 or 4; r and s each are 0 to 10, (r+s) is 2 or more.Type: GrantFiled: January 24, 2003Date of Patent: September 19, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Makoto Suzuki, Yasufimi Nakai
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Patent number: 6906215Abstract: There is provided a powdery S,S-EDDS iron complex improved in its caking property. An S,S-ethylenediamine-N,N?-disuccinic acid iron complex, which is crystalline and has an average particle diameter of from 10 to 1000 ?m and a water content of not more than 7% by weight, a powdery S,S-ethylene-N,N?-disuccinic acid (S,S-EDDS) iron complex having a compressive strength of not more than 1 kg/cm2, the compressive strength being measured according to JIS A 1108 after a lapse of 2 months under conditions of a temperature of 50° C. and a load of 300 g/cm2, and a process for producing the same.Type: GrantFiled: April 28, 2000Date of Patent: June 14, 2005Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Shigeho Tanaka, Hiroyasu Banba, Kiyonobu Niwa
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Patent number: 6852477Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.Type: GrantFiled: October 22, 2003Date of Patent: February 8, 2005Assignee: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston
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Patent number: 6838233Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N?C(SH)— group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: GrantFiled: March 3, 2004Date of Patent: January 4, 2005Assignee: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Publication number: 20040171506Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.Type: ApplicationFiled: October 22, 2003Publication date: September 2, 2004Inventors: Shirleyanne E. Haye, Janet M. Huston
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Publication number: 20040086810Abstract: A photographic bleaching composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, a rehalogenating agent, and a phthalic acid or salt thereof. This bleaching composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials, especially photographic color papers. The bleaching step can also be preceded by an acidic stop that also includes a phthalic acid or salt thereof.Type: ApplicationFiled: October 27, 2003Publication date: May 6, 2004Inventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Publication number: 20040063044Abstract: A photographic bleaching composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, a rehalogenating agent, and a phthalic acid or salt thereof. This bleaching composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials, especially photographic color papers. The bleaching step can also be preceded by an acidic stop that also includes a phthalic acid or salt thereof.Type: ApplicationFiled: September 27, 2002Publication date: April 1, 2004Applicant: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Patent number: 6703192Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.Type: GrantFiled: February 28, 2003Date of Patent: March 9, 2004Assignee: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston
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Publication number: 20030228545Abstract: A one-part photographic bleach-fixing concentrate including an iron (III) complex salt of an aminopolycaroxylic acid in an amount of 0.3 to 0.6 mol/l and a fixing agent, a ratio of ammonium ions to the total cationic ions being 0 to 50 mol %.Type: ApplicationFiled: May 8, 2003Publication date: December 11, 2003Inventor: Tomoya Oda
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Publication number: 20030203324Abstract: A color image forming method is disclosed, comprising exposing a silver halide color photographic material and developing the exposed photographic material at 43 to 180° C. to form a color image, wherein when the photographic material is exposed so that the light-sensitive layer has a transmission density of a minimum density plus 0.1, the light-sensitive layer comprises dye-clouds having an average diameter of 3.0 to 20.0 &mgr;m. There is also disclosed a digital image forming process, wherein image recording information of the photographic material which was formed by use of the color image forming method is converted to digital image information through an image sensor.Type: ApplicationFiled: March 26, 2003Publication date: October 30, 2003Inventors: Noriyuki Kokeguchi, Hiroyuki Hoshino, Hiromoto Ii
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Publication number: 20030198902Abstract: A photographic processing composition, containing at least one compound of formula (I) or (II):Type: ApplicationFiled: January 24, 2003Publication date: October 23, 2003Inventors: Makoto Suzuki, Yasufimi Nakai
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Publication number: 20030087207Abstract: A method for preparing a kit part of a bleach-fixing solution or a kit of a bleaching solution for use in silver halide color photographic materials is disclosed, comprising (a) adding a [S,S]-alkylenediamine-N,N′-disuccinic acid or its salt into a mixing tank to form a solution, and then, (b) adding thereto at least one iron(III) salt selected from the group consisting of iron(III) nitrate, iron(III) chloride, iron(III) bromide, (M1)3Fe(III) (SO4)3 and M1Fe(III) (SO4)2.Type: ApplicationFiled: April 3, 2002Publication date: May 8, 2003Applicant: KONICA CORPORATIONInventor: Satoru Kuse
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Publication number: 20030054298Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):Type: ApplicationFiled: March 29, 2002Publication date: March 20, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
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Photographic bleaching solution containing organic phosphorus acid anti-rust agent and method of use
Patent number: 6518002Abstract: An effective, biodegradable photographic bleaching solution comprises, as a bleaching agent, a ferric alkyliminodiacetic acid complex, and a particular organic phosphonic or phosphinic acid as an anti-rust agent. This anti-rust agent reduces or eliminates the formation of iron hydroxide in the processing solutions following the bleaching step, and further improves bleaching effectiveness.Type: GrantFiled: February 6, 1997Date of Patent: February 11, 2003Assignee: Eastman Kodak CompanyInventor: David G. Foster -
Patent number: 6500606Abstract: A photographic prebleaching or conditioning composition is useful for providing color positive images in color reversal photographic materials. This composition includes at least 0.0001 mol/l of a cyclic mercapto bleach accelerating agent and at least 0.0001 mol/l of a water-soluble or water-dispersible 2,6-diarylaminotriazine or diaminostilbene dye stain reducing agent. The amounts of the dye stain reducing agent and bleach accelerating agents are determined according to the following equation: [bleach accelerating agent, mol/l]≧0.01−10[dye stain reducing agent, mol/l].Type: GrantFiled: February 13, 2001Date of Patent: December 31, 2002Assignee: Eastman Kodak CompanyInventors: Harry J. Price, Michael P. Youngblood, Ramanuj Goswami
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Patent number: 6468722Abstract: A cartridge that supplies fresh photographic processing solution or chemistry to a photoprocessing machine and recovers silver from spent processing solution. The cartridge is designed to integrate a solution supply system and a silver recovery system to facilitate the collection of silver from spent processing solution, form a less-regulated spent solution and reduce chemical exposures to operators of photoprocessing systems.Type: GrantFiled: March 30, 2001Date of Patent: October 22, 2002Assignee: Eastman Kodak CompanyInventors: Robert B. Call, Jay E. Mathewson, Donna M. Timmons, Richard R. Horn
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Publication number: 20020142253Abstract: A cartridge that supplies fresh photographic processing solution or chemistry to a photoprocessing machine and recovers silver from spent processing solution. The cartridge is designed to integrate a solution supply system and a silver recovery system to facilitate the collection of silver from spent processing solution, form a less-regulated spent solution and reduce chemical exposures to operators of photoprocessing systems.Type: ApplicationFiled: March 30, 2001Publication date: October 3, 2002Applicant: Eastman Kodak CompanyInventors: Robert B. Call, Jay E. Mathewson, Donna M. Timmons, Richard R. Horn
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Publication number: 20020090581Abstract: An aqueous photographic bleach solution comprises, as primary oxidant, in a concentration eg from about 0.1 to about 1 Molar of a transition metal oxidizing agent and, as secondary oxidant, from about 0.03 to about 0.15 Molar of a persulphate or from about 0.1 to about 0.8 Molar of a peroxide. The primary oxidant is preferably a ferric complex of an aminopolycarboxylic acid such as ethylene diamine tetraacetic acid (EDTA), propylene diamine tetraacetic acid (PDTA), diethylene triamine pentaacetic acid (DTPA), or a substituted imino diacetic acid such as methyl imino diacetic acid (MIDA). The peroxide can be provided by a compound that liberates peroxide under the bleach conditions. The solutions of the invention are particularly suitable for use with a single use surface application device in which a small volume of the solution is used once and then discarded.Type: ApplicationFiled: October 3, 2001Publication date: July 11, 2002Applicant: Eastman Kodak CompanyInventors: Peter J. Twist, John R. Fyson
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Patent number: 6406838Abstract: 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: GrantFiled: July 3, 2001Date of Patent: June 18, 2002Assignee: Eastman Kodak CompanyInventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
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Publication number: 20020061476Abstract: 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: ApplicationFiled: July 3, 2001Publication date: May 23, 2002Inventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
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Publication number: 20020051946Abstract: Color negative photographic elements can be effectively processed to provide negative color images using bleaching or bleach-fixing compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching or bleach-fixing composition or introduced from carryover from a previous photoprocessing step.Type: ApplicationFiled: February 5, 2001Publication date: May 2, 2002Applicant: Eastman Kodak CompanyInventors: Jon A. Kapecki, Harry J. Price, David M. Braitsch
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Publication number: 20020051947Abstract: Color reversal photographic elements can be effectively processed to provide positive color images using bleaching compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching composition or introduced from carryover from a previous photoprocessing step, such as a prebleaching step using color reversal processing.Type: ApplicationFiled: August 30, 2001Publication date: May 2, 2002Inventors: Harry J. Price, William G. Henry
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Patent number: 6365332Abstract: Color reversal photographic elements can be effectively processed to provide positive color images using bleaching compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching composition or introduced from carryover from a previous photoprocessing step, such as a prebleaching step using color reversal processing.Type: GrantFiled: September 7, 2000Date of Patent: April 2, 2002Assignee: Eastman Kodak CompanyInventors: Harry J. Price, William G. Henry
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Publication number: 20020037482Abstract: A bleach or bleach/fixing solution for processing photographic silver halide materials which, relative to the silver halide content of the unprocessed material, exhibit prior to the bleaching step a content of silver arising from development of at least 65 mol %, in particular for processing color reversal materials, characterized in that the solution contains at least one iron complex of propylenediaminetetraacetic acid or of &bgr;-alaninediacetic acid or a mixture of these complexes and the total concentration of the stated iron complexes in the solution is at least 0.045 and at most 0.25 mol/l and a process for processing, in which such a solution is used, is characterized by a small introduced quantity of iron complexes, a low residual silver content, a low bleaching fog value, elevated resistance to precipitation and in that the bleach solution may be rejuvenated.Type: ApplicationFiled: August 1, 2001Publication date: March 28, 2002Inventors: Ralf Wichmann, Thomas Hubsch, Thomas Stetzer
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Publication number: 20020015921Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprisesType: ApplicationFiled: May 10, 2001Publication date: February 7, 2002Applicant: Eastman Kodak CompanyInventors: John R. Fyson, Louis E. Friedrich
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Publication number: 20020015922Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprisesType: ApplicationFiled: May 10, 2001Publication date: February 7, 2002Applicant: Eastman Kodak CompanyInventors: John R. Fyson, Gareth B. Evans, Peter Hewitson, Jon A. Kapecki
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Patent number: 6340560Abstract: An aminopolycarboxylic acid compound represented by the following formula or analogous thereof: The aminopolycarboxylic acid compound of the present invention can be used as a chelating agent for various metals, which is excellent in the biodegradability and masking effect on metals.Type: GrantFiled: October 7, 1998Date of Patent: January 22, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Inaba, Kiyoshi Morimoto, Shigeo Hirano
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Publication number: 20010044081Abstract: A granulated solid processing agent for a silver halide photographic material which is a core/shell type spherical granule comprising an internal nucleus and layer structure of one or more layers coating the internal nucleus, and the critical relative humidity of the internal nucleus is 70% or less.Type: ApplicationFiled: December 27, 2000Publication date: November 22, 2001Inventors: Kazuaki Yoshida, Hiroki Ide
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Publication number: 20010031432Abstract: 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): 1Type: ApplicationFiled: January 29, 2001Publication date: October 18, 2001Inventors: Yasufumi Nakai, Keizo Kimura, Shigeaki Tanaka, Yoshiharu Yabuki
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Patent number: 6303279Abstract: An aqueous redox amplifier composition comprising a color developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and hydroxylamine or a salt thereof wherein the concentration ranges are: hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution), hydroxylamine or a salt thereof from 0.25 to 5.5 g/l (as hydroxylamine sulphate), and wherein the pH is in the range from 10.5 to 12.Type: GrantFiled: October 4, 1994Date of Patent: October 16, 2001Assignee: Eastman Kodak CompanyInventor: Peter Jeffery Twist
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Patent number: 6258520Abstract: The present invention relates to imaging elements, including photographic elements and recording media, having a protective overcoat that resists fingerprints, common stains, and spills. More particularly, the present invention provides a processing-solution-permeable protective overcoat that is water resistant in the final processed product. The overcoat, before formation of the image, comprises hydrophobic polymeric particles in a gelatin matrix. Subsequent treatment of the overcoat, after formation of the image, to remove the gelatin, causes coalescence of the hydrophobic particles, resulting in the formation of a water-resistant continuous protective overcoat.Type: GrantFiled: September 29, 2000Date of Patent: July 10, 2001Assignee: Eastman Kodak CompanyInventors: Hwei-Ling Yau, Thomas H. Whitesides, Elmer C. Flood, Amy E. Jasek
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Publication number: 20010004514Abstract: Specific aromatic compounds having an extended planar &pgr; system are useful as spectral sensitizing dye stain reducing agents in photographic processing compositions and methods for providing color or black-and-white images in various photographic silver halide materials. These compounds are devoid of diaminostilbene fragments or fused triazole nuclei. They are particularly useful in fixing and bleaching compositions in the processing of color photographic silver halide materials, but can also be used in various other processing compositions.Type: ApplicationFiled: February 1, 2001Publication date: June 21, 2001Inventors: Ramanuj Goswami, Mary E. Craver, Harry J. Price
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Patent number: 6232052Abstract: Specific aromatic compounds having an extended planar &pgr; system are useful as spectral sensitizing dye stain reducing agents in photographic processing compositions and methods for providing color or black-and-white images in various photographic silver halide materials. These compounds are devoid of diaminostilbene fragments or fused triazole nuclei. They are particularly useful in fixing and bleaching compositions in the processing of color photographic silver halide materials, but can also be used in various other processing compositions.Type: GrantFiled: May 15, 2000Date of Patent: May 15, 2001Assignee: Eastman Kodak CompanyInventors: Ramanuj Goswami, Mary E. Craver, Harry J. Price
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Patent number: 6153364Abstract: Specific aromatic compounds having an extended planar .pi. system are useful as spectral sensitizing dye stain reducing agents in photographic processing compositions and methods for providing color or black-and-white images in various photographic silver halide materials. These compounds are devoid of diaminostilbene fragments or fused triazole nuclei. They are particularly useful in fixing and bleaching compositions in the processing of color photographic silver halide materials, but can be used in various other processing compositions.Type: GrantFiled: December 16, 1999Date of Patent: November 28, 2000Assignee: Eastman Kodak CompanyInventors: Ramanuj Goswami, Harry J. Price, Mary E. Craver
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Patent number: 6114101Abstract: An aqueous redox amplifier composition comprising a color developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and a hydroxylamine compound of the formula: ##STR1## or a salt thereof wherein R.sup.1 and R.sup.2 are each a substituted or unsubstituted alkyl group of 1-4 carbon atoms and wherein the concentration ranges are:hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution),hydroxylamine compound from 0.5 to 15 ml/l (as an 85% solution of diethylhydroxylamine), and wherein the pH is in the range from 10.5 to 12.Type: GrantFiled: September 23, 1994Date of Patent: September 5, 2000Assignee: Eastman Kodak CompanyInventor: Peter Jeffery Twist
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Patent number: 6077650Abstract: Color photographic elements can be effectively processed to provide color images using biodegradable bleaching compositions in which the bleaching agent includes a pyridinecarboxylic acid or 2,6-pyridinedicarboxylic acid chelating ligand. The bleaching composition is stabilized by incorporation of an organic amine base instead of the conventional inorganic base.Type: GrantFiled: June 28, 1999Date of Patent: June 20, 2000Assignee: Eastman Kodak CompanyInventor: Harry J. Price
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Patent number: 6040122Abstract: A bleaching bath for processing photographic silver halide materials with hydrogen peroxide as the active substance, characterised in that it contains at least one organic compound having a sulfinic acid function and a further functional group with free electron pairs, is distinguished by improved bleaching action and makes it possible to achieve continuous processing of hard to bleach photographic materials having an elevated silver content.Type: GrantFiled: May 25, 1999Date of Patent: March 21, 2000Assignee: Agfa Gevaert NVInventors: Thomas Fogel, Jurgen Gohmann, Norman Klaunzer
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Patent number: 5972583Abstract: Color photographic elements can be processed with an acidic periodate bleaching composition that also includes chloride ions as a rehalogenating agent.Type: GrantFiled: December 7, 1998Date of Patent: October 26, 1999Assignee: Eastman Kodak CompanyInventors: Sidney J. Bertucci, Eric R. Schmittou
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Patent number: 5962204Abstract: A conditioning or bleach accelerating solution is prepared by diluting a concentrate up to 25 times. The concentrate contains a formaldehyde bisulfite precursor salt at from 200 to 600 g/l, sulfite ions at 0 to 200 g/l, a bleach accelerating agent at from 1.5 to 25 g/l, and a metal ion chelating agent present at up to 60 g/l. The concentrate is free of sodium ions.Type: GrantFiled: June 10, 1998Date of Patent: October 5, 1999Assignee: Eastman Kodak CompanyInventors: Jean Marie Buongiorne, Michael John Haight
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Patent number: 5945262Abstract: The present invention provides a correcting liquid for silver imaged lithographic printing plates being an aqueous solution having a pH in the range between 5.5 and 8.5 and comprising a iron (III) complex salt of an organic acid, a sulphite or a metabisulphite, a silver halide solvent and an accelerator, said accelerator being an organic heterocyclic compound having a mercapto- or thione group and not having a hydrophilic substituent besides the said mercapto or thione group characterized in that said accelerator is present in an amount ranging from 0.04 to 0.4 mole per liter of correcting liquid.Type: GrantFiled: December 4, 1996Date of Patent: August 31, 1999Assignee: Agfa-Gevaert, N.B.Inventor: Lode Deprez
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Patent number: 5866310Abstract: Disclosed is a solid photographic processing composition for developing a silver halide photographic light-sensitive material comprising a ferric complex of an aminopolycarboxylic acid and a sugar alcohol compound.Type: GrantFiled: October 15, 1996Date of Patent: February 2, 1999Assignee: Konica CorporationInventor: Kenji Ishida
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Patent number: 5834170Abstract: A ferric-EDTA bleach regenerator composition can be made with bleach overflow to provide a bleach replenisher for reversal color silver halide photographic processes. The bleach regenerator composition has a critically controlled pH between about 6.0 and about 6.5, and comprises a total bromide ion concentration of at least about 210 g/l, and ferric ion in an amount of at least about 50 g/l. At least 50% of the bleach overflow and the bleach regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment to from about 5.4 to about 5.6, the pH adjusted replenisher is supplied to the bleach tank for use in the process.Type: GrantFiled: November 19, 1997Date of Patent: November 10, 1998Assignee: Eastman Kodak CompanyInventors: Mary Ellen Craver, Jean Marie Buongiorne, Michael John Haight
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Patent number: 5827636Abstract: A conditioning or bleach accelerating solution is prepared by diluting a concentrate up to 25 times. The concentrate contains a formaldehyde bisulfite precursor salt at from 200 to 600 g/l, sulfite ions at 0 to 200 g/l, a bleach accelerating agent at from 1.5 to 25 g/l, and a metal ion chelating agent present at up to 60 g/l. The concentrate is free of sodium ions.Type: GrantFiled: September 26, 1997Date of Patent: October 27, 1998Assignee: Eastman Kodak CompanyInventors: Jean Marie Buongiorne, Michael John Haight
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Patent number: 5821042Abstract: A multilayer silver halide color photographic element comprises a support having coated thereon a silver antihalation layer, an interlayer, at least two red-sensitive silver halide emulsion layers, at least two green-sensitive silver halide emulsion layers a yellow filter layer, and at least two blue-sensitive silver halide emulsion layers, wherein the interlayer provided between the silver antihalation layer and the red-sensitive silver halide emulsion layer closest to the support contains a bleach accelerator releasing compound, and the silver antihalation layer contains a water-soluble organic thiol.The invention provides reduction in residual silver levels and backside turbidity after processing, without deleteriously affecting sensitometric properties of the photographic element.Type: GrantFiled: May 22, 1997Date of Patent: October 13, 1998Assignee: Imation Corp.Inventors: Sergio Massirio, Massimo Bertoldi, Giovanni Giusto, Emilio Prosperi, Roberto Sardelli
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Patent number: 5817450Abstract: An emulsification and dispersion method of a hydrophobic, photographically useful compound comprising dispersing a water-insoluble phase containing the hydrophobic, photographically useful compound in water or in a hydrophilic colloid composition, wherein the water-insoluble phase at a temperature at which the prepared dispersion is stored may have a viscosity of from 100 poise or more to less than 1,000,000 poise at the shear rate of 10 sec.sup.-1. According to the present invention, a silver halide photographic material comprising a fine dispersion of a hydrophobic, photographically useful compound and having an excellent production suitability can be obtained.Type: GrantFiled: February 22, 1996Date of Patent: October 6, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Naoyuki Kawanishi, Masataka Ogawa, Atsushi Hayakawa, Kazuhiko Fujiwara
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Patent number: 5814436Abstract: The present invention provides a processing method which allows a silver halide color photographic material to be sufficiently desilvered and minimizes the rise in the formation of bleaching fog or stain even when it is processed in a short period of time. A novel process for the processing of a silver halide color photographic material comprising at least silver halide emulsion layer on a support which comprises subjecting the silver halide color photographic material to color development, and then processing the silver halide color photographic material with a processing solution having a bleaching capacity is provided, characterized in that said emulsion layer comprises tabular silver halide grains having ?100! major faces and a silver chloride content of 50 to 100 mol % and said processing solution having a bleaching capacity contains at least one ferric complex salt of a compound represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.Type: GrantFiled: May 27, 1997Date of Patent: September 29, 1998Assignee: Fuji Photo Film Co., Ltd.Inventor: Takatoshi Ishikawa
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Patent number: 5795681Abstract: The present invention pertains to a process for the stabilization of Holograms formed on gelatin.According to the invention, after (i) exposing, (ii) developing, and (iii) quenching said Hologram, there is added thereto (iv) a bleaching bath based on an oxidative cross-linking agent at a pH value of at least 3 or more, and thereafter, following (v) rinsing, (vi) fixing, (vii) additional rinsing and (viii) a final bath, (ix) said support material is dehydrated by the use of one or more baths in series containing a solvent which is water-miscible and does not affect the cured gelatin structure.In another embodiment, the invention pertains to light-directing wall elements for buildings made of a Holograms obtainable by the process mentioned above and applied to a transparent or opaque substrate.By means of the present invention, silver-free holographic support materials can be prepared.Type: GrantFiled: March 24, 1997Date of Patent: August 18, 1998Inventors: Helmut Muller, Jorg Gutjahr
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Patent number: 5783376Abstract: A composition for bleaching or bleach-fixing a silver halide photographic material has a pH of from 2 to 9. The composition comprises a bleaching agent which is either a persulfate or polyvalent metal complex of an aminopolycarboxylic acid, and from 0.01 to 2M of a sulfo-substituted carboxylate represented by Formula I(MO.sub.3 S).sub.n --R--(COOM).sub.m (I)wherein R is a benzene ring or a straight, branched or cyclic saturated aliphatic group having 2 to 8 carbon atoms;M is hydrogen or an organic or inorganic cation; andn is 1 to 7;with the proviso that if R is an aliphatic group, m is 2 to 4 and m and n combined cannot equal more than the number of carbon atoms in R plus two, and if R is a benzene ring, m is 2 to 5 and m and n combined cannot equal more than six.Type: GrantFiled: May 14, 1997Date of Patent: July 21, 1998Assignee: Eastman Kodak CompanyInventors: Stuart Terrance Gordon, John Michael Buchanan, Sidney Joseph Bertucci
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Patent number: 5783375Abstract: A redox amplification process with minimal steps includes processing a silver halide with an amplifier/bleach/fix solution that includes a redox oxidant capable of bleaching a silver image and a fixing agent that does not react with the redox oxidant.Type: GrantFiled: August 29, 1996Date of Patent: July 21, 1998Assignee: Eastman Kodak CompanyInventor: Peter Jeffery Twist