Amplifying Patents (Class 430/414)
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Patent number: 7018784Abstract: The invention relates to a process for amplifying structured resists. The process permits a subsequent increase in the etch resistance and a change in the structure size of the resist even in the case of ultrathin layers. The chemical amplification is carried out in a solvent that is so nonpolar that it does not dissolve the structured resist or dissolves it only to an insignificant extent. Because of the lower surface tension of these solvents, the danger of a collapse of these structures is additionally avoided.Type: GrantFiled: February 27, 2003Date of Patent: March 28, 2006Assignee: Infineon Technologies AGInventors: Jörg Rottstegge, Waltraud Herbst, Gertrud Falk, Eberhard Kühn
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Patent number: 6759184Abstract: A process for the post-exposure amplification of resist structures uses amplification of resist structures of fluorinated resist polymers by structural growth of the structures by targeted chemical bonding of fluorinated oligomers. In the first step, a fluorine-containing resist is applied to a substrate. After exposure and development of the resist, bonding of an amplification agent chemically amplifies the resist structures. A fluorine-containing amplification agent is preferably used to achieve an improved reaction between polymer and amplification agent due to the improved miscibility of the molecular chains.Type: GrantFiled: June 28, 2002Date of Patent: July 6, 2004Assignee: Infineon Technologies AGInventors: Jörg Rottstegge, Christian Eschbaumer, Christoph Hohle, Waltraud Herbst, Michael Sebald
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Publication number: 20040121270Abstract: A method of processing material in which the material is held on the outside periphery of a drum and processing solution is applied at least twice to the sensitized surface of the material as the drum rotates. The total volume of solution applied is less than 300 ml/sqm of material being processed.Type: ApplicationFiled: December 18, 2002Publication date: June 24, 2004Applicant: Eastman Kodak CompanyInventors: Gareth Evans, Peter Hewitson, Leslie R. Wells
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Patent number: 6660461Abstract: 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: GrantFiled: November 1, 2002Date of Patent: December 9, 2003Assignee: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston, Richard R. Horn, Anthony Jarkowski
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Patent number: 6649330Abstract: In accordance with one embodiment of the invention, a photographic element is described comprising a support bearing one or more hydrophilic colloid layers including at least one photographic silver halide emulsion layer, wherein sequestered silver ions are incorporated into at least one hydrophilic colloid layer in the form of a silver ion containing material which sequesters silver ions prior to photographic processing and releases silver ions upon exposure to photographic processing solutions. Method for preparing and processing such photographic element are also described. In accordance with particular embodiments of the invention, the silver ion containing material comprises a silver ion-exchanged zeolite material or an intercalation composition comprising a layered host material having silver ions inserted as guest ions between the layers of the host material.Type: GrantFiled: December 28, 2001Date of Patent: November 18, 2003Assignee: Eastman Kodak CompanyInventors: Joseph F. Bringley, Kenneth J. Lushington, Tiecheng A. Qiao, James S. Honan
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Patent number: 6440653Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises developing the material with a developer solution containing a silver halide developing agent, applying to the surface of the developed material a solution of a sulphite compound that reacts with oxidised developing agent and prevents further development, and applying to the surface of the developed material a solution of an oxidant that oxidises any remaining developing agent, wherein said sulphite compound is present in an amount sufficient to react with all the oxidised developing agent and said solutions of sulphite and oxidant are applied to the material by means other than immersion in a tank.Type: GrantFiled: May 10, 2001Date of Patent: August 27, 2002Assignee: Eastman Kodak CompanyInventors: John R. Fyson, Louis E. Friedrich
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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: 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: 6159668Abstract: There is disclosed a method for forming a color-image, which method comprises 1 containing, in a light-sensitive material, a dye-forming coupler, and a compound or its precursor, that is oxidized by a silver halide, to form an oxidation product thereof, that is coupled with the coupler, to form a dye having an absorption in a visible wavelength region; 2 having a given coating silver amount; and 3 applying a peroxide-containing solution onto the light-sensitive material, by a coating method by droplet-spraying. The method can achieve both "a lowered amount of a waste solution" and "reduction in a change of the processing.Type: GrantFiled: January 6, 2000Date of Patent: December 12, 2000Assignee: Fuji Photo Film Co., Ltd.Inventor: Toshiyuki Makuta
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Patent number: 6156488Abstract: A method of processing an imagewise exposed photographic silver halide material which includes a redox amplification dye image-forming step and a bleach step using an aqueous solution of hydrogen peroxide or a compound capable of releasing hydrogen peroxide.Type: GrantFiled: June 17, 1994Date of Patent: December 5, 2000Assignee: Eastman Kodak CompanyInventors: Peter Douglas Marsden, John Richard Fyson
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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: 6063553Abstract: A photographic recording material for use in redox amplification comprises a support having thereon a plurality of emulsion layers, each emulsion layer containing a color-forming coupler, and wherein the activity of the couplers is from 45 to 70% as measured by the citrazinic acid method. These materials may be developed by a redox development step which may be followed by a bleach-fix step without any intervening step. Staining is eliminated with the use of these photographic materials.Type: GrantFiled: December 19, 1997Date of Patent: May 16, 2000Assignee: Eastman Kodak CompanyInventors: Adrian J. Codling, John R. Fyson
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Patent number: 6060225Abstract: There is disclosed a method for forming a color-image, which method comprises 1 containing, in a light-sensitive material, a dye-forming coupler, and a compound or its precursor, that is oxidized by a silver halide, to form an oxidation product thereof, that is coupled with the coupler, to form a dye having an absorption in a visible wavelength region; 2 having a given coating silver amount; and 3 applying a peroxide-containing solution onto the light-sensitive material, by a coating method by droplet-spraying. The method can achieve both "a lowered amount of a waste solution" and "reduction in a change of the processing.Type: GrantFiled: March 4, 1999Date of Patent: May 9, 2000Assignee: Fuji Photo Film Co., Ltd.Inventor: Toshiyuki Makuta
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Patent number: 5985509Abstract: A high contrast photographic material comprises a support bearing a silver halide emulsion layer. This material is free from nucleating agents and has a silver:gelatin ratio greater than 1. The emulsion layer comprises silver halide grains that are spectrally sensitized. Moreover, the material contains a density enhancing amine compound in the emulsion layer or in an adjacent hydrophilic colloid layer. The spectrally sensitized silver halide grains comprise one grain population sensitized to radiation of a particular wavelength region, and one or more additional grain populations sensitized to radiation of a different wavelength region.Type: GrantFiled: December 18, 1997Date of Patent: November 16, 1999Assignee: Eastman Kodak CompanyInventors: Allison Hazel C. Dale, Roger H. Piggin
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Patent number: 5972573Abstract: An image forming method of a silver halide light sensitive photographic material including a color image forming layer containing a silver halide emulsion and a dye providing material is disclosed, the image forming method comprising the steps of developing the exposed photographic material with a first processing solution and subjecting the developed photographic material to amplification with a second processing solution, wherein the first processing solution contains a black-and-white developing agent and a color developing agent.Type: GrantFiled: April 14, 1998Date of Patent: October 26, 1999Assignee: Konica CorporationInventors: Kazuhiro Miyazawa, Shigeo Tanaka, Noriyuki Kokeguchi, Yoshihiko Suda, Junji Ito
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Patent number: 5972575Abstract: Methods of selectively silvering photographic materials. A method for selective reflective silvering of color negative photographic materials, whereby an attractive image comprising reflective silver, black, and full color areas may be obtained, comprises the steps of developing the materials using a conventional color developer, applying a reflective silvering bath, and removing silver from selected areas of said materials. A method for selective reflective silvering of color positive photographic materials comprises the steps of developing said materials using a conventional color developer, applying a reflective silvering bath, and removing silver from selected areas of said materials.Type: GrantFiled: March 20, 1998Date of Patent: October 26, 1999Inventor: Victoria Cabezas
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Patent number: 5968721Abstract: A process for the redox development of an imagewise exposed photographic recording material comprises developing the photographic material in a redox developer/amplifier solution containing peroxide as an oxidizing agent, hydroxylamine as an antioxidant, and to improve the stability of the solution under aeration conditions, an effective amount of a mono or di-N-substituted hydroxylamine. The molar ratio of hydroxylamine to N-substituted hydroxylamine may be from 1:200 to 100:1. The substituents in the mono- or di-N-substituted hydroxylamine may be substituted or unsubstituted monovalent organic groups having 1 to 12 carbon atoms.Type: GrantFiled: November 13, 1997Date of Patent: October 19, 1999Assignee: Eastman Kodak CompanyInventor: Peter J. Twist
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Patent number: 5968717Abstract: A process for forming a photographic image includes a color development step and a combined bleach/redox amplification step. The bleach amplification step is effected by applying to the surface of the photographic paper or other material an amount of bleach/redox amplifier solution in the range from 20 to 500 ml/m.sup.2. The solution applied to the surface is used once only and contains hydrogen peroxide or a peroxide releasing compound.Type: GrantFiled: March 4, 1998Date of Patent: October 19, 1999Assignee: Eastman Kodak CompanyInventor: Nigel Richard Wildman
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Patent number: 5965334Abstract: A process for the development of an imagewise exposed photographic recording material containing more than 200 mg/m.sup.2 of silver comprises subjecting the photographic recording material to a development/amplification step using a developer/amplifier solution containing an oxidizing agent, and controlling the process temperature within the range of from 20 to 50.degree. C. and the process time between 5 and 20 seconds. After the development/amplification step, the photographic material can be immediately subjected to a bleach-fix step, and staining is avoided.Type: GrantFiled: December 19, 1997Date of Patent: October 12, 1999Assignee: Eastman Kodak CompanyInventors: John R. Fyson, Helen M. Redfearn
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Patent number: 5925504Abstract: A silver halide material can be processed using a redox amplification developer solution and a bleach solution. Both solutions contain a peroxide oxidant.Type: GrantFiled: October 20, 1997Date of Patent: July 20, 1999Assignee: Eastman Kodak CompanyInventor: John Richard Fyson
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Patent number: 5916739Abstract: An image forming method of a silver halide light sensitive photographic material having at least one color image forming layer containing a silver halide emulsion and a dye forming coupler, the image forming method comprising the steps of exposing the photographic material to light and subjecting the exposed photographic material to amplification development to form a dye image, wherein the color image forming layer contains a coupler capable of forming a dye, upon development, having a molar extinction coefficient at a wavelength of an absorption maximum of 60,000 or more.Type: GrantFiled: November 18, 1997Date of Patent: June 29, 1999Assignee: Konica CorporationInventors: Kazuhiro Miyazawa, Shigeo Tanaka
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Patent number: 5900353Abstract: Photographic materials are processed by color development and a peroxide amplifier solution. The color developer contains an alkali metal phosphate and has a pH of 11 to 12.Type: GrantFiled: July 25, 1996Date of Patent: May 4, 1999Assignee: Eastman Kodak CompanyInventor: Nigel Richard Wildman
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Patent number: 5879865Abstract: An image forming method for a silver halide photographic light sensitive material comprising a support having thereon a color image forming layer containing a silver halide emulsion and a dye forming coupler is disclosed, comprising (i) subjecting the photographic material to area modulation exposure and (ii) subjecting the exposed photographic material to amplifying development to form a color image.Type: GrantFiled: November 18, 1997Date of Patent: March 9, 1999Assignee: Konica CorporationInventors: Kazuhiro Miyazawa, Shigeo Tanaka
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Patent number: 5871891Abstract: A processing method can be used to develop sequentially both low silver and relatively high silver photographic materials in the same processor. The method includes a development step for each type of material, in any order, with a developer solution adapted for both development steps. When the lower silver photographic materials are developed, the developer solution also contains an oxidizing agent to render it a redox developer/amplifier solution. The oxidizing agent is removed or inactivated when the relatively high silver photographic materials are processed with the same developer solution.Type: GrantFiled: November 13, 1997Date of Patent: February 16, 1999Assignee: Eastman Kodak CompanyInventors: Gareth B. Evans, Peter J. Twist
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Patent number: 5837430Abstract: An image forming method using a silver halide photographic light-sensitive material is disclosed The image forming method comprises the steps of (1) imagewise exposing to light a silver halide photographic material comprising a support having thereon a photographic layer including a yellow image forming silver halide emulsion layer, a magenta image forming silver halide emulsion layer and a cyan image forming silver halide emulsion layer, and (2) developing the silver halide photographic light-sensitive material with an amplifying development, in which silver halide grains contained each of the color forming layers have a silver chloride content of not less than 80 mole-%, and the number of silver halide grains per unit area in the magenta silver halide emulsion layer is larger than that in the yellow image forming silver halide emulsion layer and that in the cyan image forming silver halide emulsion layer, and the number of silver halide grains per unit area in the magenta image forming silver halide emulsioType: GrantFiled: June 13, 1997Date of Patent: November 17, 1998Assignee: Konica CorporationInventors: Kazuhiro Miyazawa, Shigeo Tanaka
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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
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Patent number: 5766831Abstract: A color photographic material is processed first by color development, then is contacted with a solution that both bleaches and provides redox amplification.Type: GrantFiled: July 25, 1996Date of Patent: June 16, 1998Assignee: Eastman Kodak CompanyInventor: Nigel Richard Wildman
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Patent number: 5756270Abstract: A method of processing an imagewise exposed photographic silver halide color material which comprises color development and bleach steps. Between these two steps is a fixing, stop or wash step, the solution for which is passed through an absorbent material that removes carryover color developing agent.Type: GrantFiled: September 27, 1996Date of Patent: May 26, 1998Assignee: Eastman Kodak CompanyInventor: John Richard Fyson
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Patent number: 5756268Abstract: If a color photographic material, which is processed by the process steps a) image-by-image exposure, b) color developing, c) bleaching, d) fixing, e) washing or stabilizing, and f) drying, wherein steps c) and d) may be combined to constitute bleach-fixing, is subjected to a temperature treatment of 0.01 to 30 seconds at 60 to 240.degree. C. between exposure and color developing, an increase of the contrast can thereby be obtained.Type: GrantFiled: April 21, 1997Date of Patent: May 26, 1998Assignee: Agfa-Gevaert AGInventors: Edgar Draber, Rudolf Tromnau, Manfred Peters
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Patent number: 5741631Abstract: A process for the formation of a dye image by a redox amplification process in an imagewise exposed photographic color material having at least one silver halide layer and associated therewith a dye image-forming color coupler, comprises treating the material in a color developer solution containing a color developing agent and hydroxylamine as developing agent preservative. The color developing solution is replenished directly as solids or liquid concentrates with or without additional water. The process is carried out in a tank in which the ratio of the tank volume to maximum area of material accommodatable therein is less than 11 dm.sup.3 /m.sup.2.Type: GrantFiled: January 9, 1997Date of Patent: April 21, 1998Assignee: Eastman Kodak CompanyInventor: Peter Jeffery Twist
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Patent number: 5738980Abstract: Processing of color photographic materials can be accomplished using an aqueous redox amplifier composition comprising a color developing agent, an antioxidant therefor, hydrogen peroxide, and a stabilizing amount of nitrite ions to reduce dye loss during storage.Type: GrantFiled: August 14, 1997Date of Patent: April 14, 1998Assignee: Eastman Kodak CompanyInventors: Peter Jeffrey Twist, Christopher John Winscom
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Patent number: 5736295Abstract: A density enhancing amine compound is incorporated into a silver halide element containing both spectrally sensitized and non-spectrally sensitized silver halide grains in the emulsion layer.Type: GrantFiled: August 8, 1996Date of Patent: April 7, 1998Assignee: Eastman Kodak CompanyInventors: Allison Hazel Caroline Dale, Roger Hugh Piggin
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Patent number: 5731135Abstract: An aqueous redox amplifier solution having a pH in the range 10.0 to 13.5 comprises:a color developing agent and/or auxiliary developing agent, hydrogen peroxide or a compound that provides hydrogen peroxide in a concentration equivalent to 0.1 to 50.0 ml/l of 30% w/w solution, anda borate or other complexing compound capable of reversibly forming a complex with hydrogen peroxide, the complexing compound being in a concentration of from 1.0 to 100.0 g/l, andwherein the relative amounts of complexing compound and hydrogen peroxide are such as to provide an amount of hydrogen peroxide effective for redox amplification and buffer the hydrogen peroxide and thereby reduce the decline in the rate of redox amplification. This solution is useful for processing color photographic elements.Type: GrantFiled: January 30, 1997Date of Patent: March 24, 1998Assignee: Eastman Kodak CompanyInventors: Peter Jeffery Twist, Christopher John Winscom
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Patent number: 5707786Abstract: By means of a development intensification process for processing color photographic silver halide materials, the silver halide emulsions of which contain more than 90 mol. % of AgCl and less than 0.8 g of silver halide per m.sup.2 (stated as the equivalent quantity of AgNO.sub.3), short processing times accompanied by stable replenishment rates are obtained if at least one compound of the formulae (I), (II) or (III) is used as the developer substance in a quantity of 0.002 to 0.04 mol/l of developer solution ##STR1## in which R.sub.1 to R.sub.3, R.sub.10 to R.sub.17, R.sub.21 to R.sub.23, m, n and Y have the meaning stated in the specification.Type: GrantFiled: July 8, 1996Date of Patent: January 13, 1998Assignee: Agfa-GevaertInventors: Arno Schmuck, Jorg Hagemann, Norman Klaunzer
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Patent number: 5702873Abstract: A redox-amplification solution comprising hydrogen peroxide, or a substance capable of releasing hydrogen peroxide, or reducing agent, such as a color developing agent, and in combination three or more sequestering agents for complexing with a transition metal ion to inhibit catalysis of impurities emanating from a photographic film coating and enhance the stability of the solution; a method of photographic color processing including a step using the redox-amplification solution and its use therefor.Type: GrantFiled: April 10, 1996Date of Patent: December 30, 1997Assignee: Eastman Kodak CompanyInventor: Peter Jeffery Twist
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Patent number: 5702874Abstract: High silver chloride photographic materials are processed using a development stop bath containing a sulfite fixing agent, followed by bleaching, fixing and treatment with an oxidizing agent that destroys sulfite ions. No washing or stabilizing steps are used after the treatment with oxidizing agent.Type: GrantFiled: September 27, 1996Date of Patent: December 30, 1997Assignee: Eastman Kodak CompanyInventors: John Richard Fyson, Gareth Bryn Evans
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Patent number: 5695913Abstract: A process for the formation of a color image which comprises the steps of: exposing to light a silver halide light-sensitive material comprising a support having thereon at least one light-sensitive emulsion layer, and developing said light-sensitive material to form a color image, wherein said light-sensitive material comprises at least one dye-forming coupler and at least one coloring reducing agent represented by formula (I) and is intensified with a solution containing hydrogen peroxide or a compound releasing hydrogen peroxide to form an intensified image:R.sup.11 --NH--NH--X--R.sup.12 (I)wherein R.sup.11 represents an aryl group or a heterocyclic group; R.sup.12 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; and X represents --SO.sub.2 --, --CO--, --COCO--, --CO--O--, --CO--N(R.sup.13)--, --COCO--O--, --COCO--N(R.sup.13)--, or --SO.sub.2 --N(R.sup.13)--, in which R.sup.Type: GrantFiled: February 28, 1996Date of Patent: December 9, 1997Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Nakamura, Koki Nakamura, Kiyoshi Takeuchi
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Patent number: 5686229Abstract: A photographic material is processed by fixing during or after development, followed by redox amplification while monitoring image formation and adjusting to treatment time or composition of the redox amplifying solution, to obtain desired results.Type: GrantFiled: September 13, 1996Date of Patent: November 11, 1997Assignee: Eastman Kodak CompanyInventor: Peter J. Twist
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Patent number: 5681755Abstract: An improved method for depositing metal particles on a marker which catalyzes the reduction of metal ions from a physical developer comprising a solution of metal ions, a molar excess of complexant in respect to the metal ions and a reducing agent. Said method being preferably employed for the detection of one or more components of an aggregate formed between a least one specific binding agent and its corresponding bindable substance by labelling at least one component of said aggregate with a marker and contacting said aggregate with a physical developer, whereby under influence of the marker a metal particle is formed which can be detected. Further the invention also relates to solutions and test-kits adapted for carrying out the above mentioned method.Type: GrantFiled: June 6, 1995Date of Patent: October 28, 1997Assignee: Janssen Pharmaceutica N.V.Inventors: Marcus J. M. Noppe, Frank J. Konings
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Patent number: 5674755Abstract: An improved method for depositing metal particles on a marker which catalyzes the reduction of metal ions from a physical developer comprising a solution of metal ions, a molar excess of complexant in respect to the metal ions and a reducing agent. Said method being preferably employed for the detection of one or more components of an aggregate formed between a least one specific binding agent and its corresponding bindable substance by labelling at least one component of said aggregate with a marker and contacting said aggregate with a physical developer, whereby under influence of the marker a metal particle is formed which can be detected. Further the invention also relates to solutions and test-kits adapted for carrying out the above mentioned method.Type: GrantFiled: June 6, 1995Date of Patent: October 7, 1997Assignee: Janssen Pharmaceutica N.V.Inventors: Marcus J. M. Noppe, Frank J. Konings
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Patent number: 5670300Abstract: A redox amplification photographic process comprises a sulfite fixing step after development-amplification and prior to peroxide bleaching.Type: GrantFiled: August 9, 1996Date of Patent: September 23, 1997Assignee: Eastman Kodak CompanyInventors: John Richard Fyson, Gareth Bryn Evans
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Patent number: 5667947Abstract: An aqueous redox amplifier solution having a pH in the range 10.0 to 13.5 comprises:a color developing agent and/or auxiliary developing agent,hydrogen peroxide or a compound that provides hydrogen peroxide in a concentration equivalent to 0.1 to 50.0 ml/l of 30% w/w solution, anda borate or other complexing compound capable of reversibly forming a complex with hydrogen peroxide, the complexing compound being in a concentration of from 1.0 to 100.0 g/l, andwherein the relative amounts of complexing compound and hydrogen peroxide are such as to provide an amount of hydrogen peroxide effective for redox amplification and buffer the hydrogen peroxide and thereby reduce the decline in the rate of redox amplification. This solution is useful for processing color photographic elements.Type: GrantFiled: November 13, 1995Date of Patent: September 16, 1997Assignee: Eastman Kodak CompanyInventors: Peter Jeffery Twist, Christopher John Winscom
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Patent number: 5629139Abstract: Photographic elements, especially color papers, can be processed with developer, redox amplification or bleaching solutions that contain hydrogen peroxide or other oxidants. These solutions include a dissolved compound that has a hydrophobic hydrocarbon group and an additional group that enables the compound to adsorb to silver or stainless steel. The dissolved compound inhibits the catalytic effect of the metal on decomposition of the hydrogen peroxide so the processing solutions are more stable.Type: GrantFiled: October 3, 1995Date of Patent: May 13, 1997Assignee: Eastman Kodak CompanyInventor: Peter J. Twist
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Patent number: 5466562Abstract: A method of processing an imagewise exposed photographic silver halide colour material by a redox amplification method in which the colour material is treated with a colour developing agent in the presence of an oxidantin which a processor is used which comprises means for applying a relatively small volume of processing solution to an imagewise exposed silver halide material and in which the relatively small volume of solution is supplied from a reservoir of relatively large volume and, while processing, the processing solution being used is isolatable from said reservoir and,wherein either a colour developer solution without oxidant or an oxidant solution without colour developing agent is held in the reservoir andwherein the additional oxidant (or colour developing agent) respectively needed for amplification is introduced into the processing solution while it is isolated from said reservoir andwherein the used developer/amplifier so-formed is discarded into said reservoir after use where any unused introdType: GrantFiled: July 15, 1994Date of Patent: November 14, 1995Assignee: Eastman Kodak CompanyInventor: Peter D. Marsden
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Patent number: 5445925Abstract: A color image can be obtained from a color photographic element by multiple color development steps. The first color development is carried out in the usual manner after imagewise exposure. The second color development step is carried out after bleaching with a rehalogenating bleaching agent, and is used to develop only rehalogenated silver halide. This specific development is possible by either using a chloride rehalogenating agent in the bleaching solution, using a sulfite fixing agent before bleaching, or by fogging the element between bleaching and the second color development step.Type: GrantFiled: April 7, 1994Date of Patent: August 29, 1995Assignee: Eastman Kodak CompanyInventors: Peter D. Marsden, Gareth B. Evans
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Patent number: 5441853Abstract: A method of making a photographic color print using a photographic color material containing low levels of silver halide characterized in that,(a) after image formation and washing and/or stop bath treatment and(b) before non-uniform exposure to adventitious light,the print is uniformly exposed to a light source so that undeveloped silver halide is caused to print out uniformly. Such a uniform density is much more acceptable than a non-uniform density caused by uneven light in normal conditions.Type: GrantFiled: November 26, 1993Date of Patent: August 15, 1995Assignee: Eastman Kodak CompanyInventors: John R. Fyson, Roland G. Willis
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Patent number: 5439784Abstract: A method for replenishing an unstable photographic processing solution is disclosed, including the following replenisher solutions:(1) a color developer replenisher,(2) an oxidizing agent replenisher, and(3) a halide-containing seasoning replenisher (starter solution).The oxidizing agent is not removed from the developer/amplifier after use.Type: GrantFiled: October 19, 1992Date of Patent: August 8, 1995Assignee: Eastman Kodak CompanyInventors: Andrew D. Grimsey, David M. Henson, Peter D. Marsden, Peter J. Twist
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Patent number: 5418117Abstract: A method of processing an imagewise exposed photographic silver halide colour material by a redox amplification method in wherein colour developing solution is applied to the material in the presence of atmospheric oxygen and a hydroxylamine compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each an alkyl or aryl groups either of which may be substituted, andwherein the colour developer solution is agitated sufficiently for redox amplification to occur.Type: GrantFiled: July 15, 1994Date of Patent: May 23, 1995Assignee: Eastman Kodak CompanyInventor: Peter D. Marsden
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Patent number: 5387499Abstract: A method of processing an imagewise exposed photographic material in a processing solution which is unstable to the extent that it deteriorates without external reaction in which the photographic material is passed through a tank containing the solution characterized in that the solution is circulated through the tank at a rate of from 0.1 to 10 tank volumes per minute.Type: GrantFiled: August 14, 1992Date of Patent: February 7, 1995Assignee: Eastman Kodak CompanyInventors: Anthony Earle, James I. Dunlop, Edward C. T. S. Glover, Peter D. Marsden, Roger Baretll