Intensifying Patents (Class 430/373)
  • Patent number: 7214464
    Abstract: The present invention is directed to a method of forming a positive image in a photothermographic assembly comprising a photothermographic material and an intensifying means for converting ionizing radiation, wherein the assembly has been imagewise exposed to ionizing radiation to form a latent image in the photothermographic material. The photothermographic material has at least one imaging layer comprising a potentially negative-working emulsion, wherein thermal development of unexposed silver salts in exposed areas relative to unexposed areas is inhibiting when thermally developing the imagewise exposed assembly, thereby producing a positive image. The present invention is also directed to a photothermographic assembly that can be used in the present process in which a positive image characterized by high speed and discrimination is formed when exposed and thermally heated above 150° C.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: May 8, 2007
    Assignee: Eastman Kodak Company
    Inventors: Michael R. Roberts, Kurt D. Sieber, Paul B. Gilman, Jr.
  • Patent number: 7063925
    Abstract: The invention relates to a photographic article comprising a base material carrying at least one layer comprising a photographic image formed by combination of dyes formed from couplers wherein areas of said photo image are colored without dyes formed by couplers.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: June 20, 2006
    Assignee: Eastman Kodak Company
    Inventors: William T. Rochford, Robert P. Bourdelais, Mridula Nair
  • Publication number: 20040121270
    Abstract: 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: Application
    Filed: December 18, 2002
    Publication date: June 24, 2004
    Applicant: Eastman Kodak Company
    Inventors: Gareth Evans, Peter Hewitson, Leslie R. Wells
  • Patent number: 6660461
    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: Grant
    Filed: November 1, 2002
    Date of Patent: December 9, 2003
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Richard R. Horn, Anthony Jarkowski
  • Patent number: 6593042
    Abstract: The invention relates to a photographic article comprising abase material carrying at least one layer comprising a photographic image formed by combination of dyes formed from couplers wherein areas of said photo image are colored without dyes formed by couplers.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 15, 2003
    Assignee: Eastman Kodak Company
    Inventors: William T. Rochford, Robert P. Bourdelais, Mridula Nair
  • Patent number: 6503670
    Abstract: A process for restoring the color of faded color negative film, particular for faded color motion pictures. The original faded negative film is used to produce a green enhancement mask and a blue enhancement mask (or a combination green/blue enhancement mask). Standard red, green, and blue separations are also made from the original faded negative. By combining the green and blue enhancement masks with the standard green and blue separations, respectively, (or the combination green/blue enhancement mask with the green separations and blue separations), enhanced green and blue separations are created. The enhanced green separation, the enhanced blue separation, and the red separation are recombined to form the restored color negative or interpositive. Alternately, from the original negative, an enhanced blue mask can be created, and intermediate film stock printed with yellow light passed through the original negative to produce unprocessed intermediate stock can be created.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: January 7, 2003
    Assignee: VCE.com, Inc
    Inventor: Peter Kuran
  • Publication number: 20030003409
    Abstract: A process for restoring the color of faded color negative film, particular for faded color motion pictures. The original faded negative film is used to produce a green enhancement mask and a blue enhancement mask (or a combination green/blue enhancement mask). Standard red, green, and blue separations are also made from the original faded negative. By combining the green and blue enhancement masks with the standard green and blue separations, respectively, (or the combination green/blue enhancement mask with the green separations and blue separations), enhanced green and blue separations are created. The enhanced green separation, the enhanced blue separation, and the red separation are recombined to form the restored color negative or interpositive. Alternately, from the original negative, an enhanced blue mask can be created, and intermediate film stock printed with yellow light passed through the original negative to produce unprocessed intermediate stock can be created.
    Type: Application
    Filed: June 27, 2001
    Publication date: January 2, 2003
    Inventor: Peter Kuran
  • Patent number: 6479223
    Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises applying to the material in an imagewise manner a developer solution containing a silver halide developing agent wherein the amount of solution applied depends on the image density to be produced, removing unreacted developing agent from the material or inactivating unreacted developing agent in the material by means other than immersion of the material in a liquid in a tank.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: November 12, 2002
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Gareth B. Evans, Peter Hewitson, Jon A. Kapecki
  • Patent number: 6444392
    Abstract: A black and white graphic arts film comprising a support having thereon at least one emulsion layer, said emulsion layer comprising: a trinuclear merocyanine spectral sensitising dye; 2-methylthio-4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene (SMe-TAI); and a photosensitive silver halide.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: September 3, 2002
    Assignee: Eastman Kodak Company
    Inventor: Julie Baker
  • Patent number: 6440653
    Abstract: 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: Grant
    Filed: May 10, 2001
    Date of Patent: August 27, 2002
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Louis E. Friedrich
  • Publication number: 20020015922
    Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises
    Type: Application
    Filed: May 10, 2001
    Publication date: February 7, 2002
    Applicant: Eastman Kodak Company
    Inventors: John R. Fyson, Gareth B. Evans, Peter Hewitson, Jon A. Kapecki
  • Publication number: 20020015921
    Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises
    Type: Application
    Filed: May 10, 2001
    Publication date: February 7, 2002
    Applicant: Eastman Kodak Company
    Inventors: John R. Fyson, Louis E. Friedrich
  • Patent number: 6303279
    Abstract: 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: Grant
    Filed: October 4, 1994
    Date of Patent: October 16, 2001
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 6159668
    Abstract: 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: Grant
    Filed: January 6, 2000
    Date of Patent: December 12, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Toshiyuki Makuta
  • Patent number: 6156488
    Abstract: 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: Grant
    Filed: June 17, 1994
    Date of Patent: December 5, 2000
    Assignee: Eastman Kodak Company
    Inventors: Peter Douglas Marsden, John Richard Fyson
  • Patent number: 6114101
    Abstract: 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: Grant
    Filed: September 23, 1994
    Date of Patent: September 5, 2000
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 6063553
    Abstract: 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: Grant
    Filed: December 19, 1997
    Date of Patent: May 16, 2000
    Assignee: Eastman Kodak Company
    Inventors: Adrian J. Codling, John R. Fyson
  • Patent number: 6033831
    Abstract: A method for forming an image is disclosed. The method comprises the steps of exposing a photographic image forming medium by scanning by a light beam, and developing the photographic image forming medium to form an image,wherein the diameter and the intensity of light beam are controlled so that the diameter and the intensity satisfy the following relations (1), (2) and (3) within the range of the reflection optical density of an image to be formed after developing of from larger than 0.8 to 3.0;(1) the value of .alpha. is substantially the same as the value of .beta. when .alpha.=I.sub.d1 .times.D.sub.d1.sup.2 and .beta.=I'.sub.d1 .times.D.sub.0.8, and(2) D.sub.d1 <D.sub.0.8(3) (D.sub.d2 -D.sub.d1)/(d.sub.2 -.sub.1)<0wherein I.sub.d1 and D.sub.d1 are each intensity and diameter of light beam to form an image having relection optical density of d.sub.1 ; D.sub.0.8 is the diameter of light beam to form an image having density of 0.8; I'.sub.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: March 7, 2000
    Assignee: Konica Corporation
    Inventors: Tsuyoshi Ikeda, Takahiko Nojima
  • Patent number: 6033832
    Abstract: A process for the production of a photographic image, in particular an ID card, using a color photographic silver halide material on a reflective support having a zone I in which information is recorded in the form of a colored image and a zone II in which data readable by infra-red light are recorded, comprising the following processing steps:a) exposure,b) development with a color developer,c) treatment with H.sub.2 O.sub.2 or a compound releasing H.sub.2 O.sub.2,d) fixing without prior or concomitant bleaching,e) washing or stabilizing andf) drying,in which steps (b) and (c) may be combined to a single step, results in a clear color image as well as a silver image which is reliably legible under IR light if steps (a) and (b) are carried out in such a manner that the silver maximum density in zone II after processing is at least 0.35, preferably not less than 0.5, measured under reflection at 850 nm, and the silver maximum density in zone I after processing is at most 0.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: March 7, 2000
    Assignee: Agfa-Gevaert N.V.
    Inventor: Kaspar Wingender
  • Patent number: 5972575
    Abstract: 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: Grant
    Filed: March 20, 1998
    Date of Patent: October 26, 1999
    Inventor: Victoria Cabezas
  • Patent number: 5972573
    Abstract: 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: Grant
    Filed: April 14, 1998
    Date of Patent: October 26, 1999
    Assignee: Konica Corporation
    Inventors: Kazuhiro Miyazawa, Shigeo Tanaka, Noriyuki Kokeguchi, Yoshihiko Suda, Junji Ito
  • Patent number: 5968721
    Abstract: 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: Grant
    Filed: November 13, 1997
    Date of Patent: October 19, 1999
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 5968717
    Abstract: 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: Grant
    Filed: March 4, 1998
    Date of Patent: October 19, 1999
    Assignee: Eastman Kodak Company
    Inventor: Nigel Richard Wildman
  • Patent number: 5965334
    Abstract: 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: Grant
    Filed: December 19, 1997
    Date of Patent: October 12, 1999
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Helen M. Redfearn
  • Patent number: 5925504
    Abstract: A silver halide material can be processed using a redox amplification developer solution and a bleach solution. Both solutions contain a peroxide oxidant.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: July 20, 1999
    Assignee: Eastman Kodak Company
    Inventor: John Richard Fyson
  • Patent number: 5916739
    Abstract: 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: Grant
    Filed: November 18, 1997
    Date of Patent: June 29, 1999
    Assignee: Konica Corporation
    Inventors: Kazuhiro Miyazawa, Shigeo Tanaka
  • Patent number: 5900353
    Abstract: 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: Grant
    Filed: July 25, 1996
    Date of Patent: May 4, 1999
    Assignee: Eastman Kodak Company
    Inventor: Nigel Richard Wildman
  • Patent number: 5879865
    Abstract: 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: Grant
    Filed: November 18, 1997
    Date of Patent: March 9, 1999
    Assignee: Konica Corporation
    Inventors: Kazuhiro Miyazawa, Shigeo Tanaka
  • Patent number: 5871891
    Abstract: 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: Grant
    Filed: November 13, 1997
    Date of Patent: February 16, 1999
    Assignee: Eastman Kodak Company
    Inventors: Gareth B. Evans, Peter J. Twist
  • Patent number: 5837430
    Abstract: 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 emulsio
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: November 17, 1998
    Assignee: Konica Corporation
    Inventors: Kazuhiro Miyazawa, Shigeo Tanaka
  • Patent number: 5837431
    Abstract: 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: Grant
    Filed: December 5, 1997
    Date of Patent: November 17, 1998
    Assignee: Eastman Kodak Company
    Inventors: Peter Jeffrey Twist, Christopher John Winscom
  • Patent number: 5821037
    Abstract: A redox developer-amplifier composition contains a color developing agent and a redox oxidizing agent. The composition also contains a stabilizing amount of Zn.sup.++ or Mg.sup.++ ions, and thus has improved stability.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: October 13, 1998
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Christopher J. Winscom
  • Patent number: 5783375
    Abstract: 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: Grant
    Filed: August 29, 1996
    Date of Patent: July 21, 1998
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 5766831
    Abstract: A color photographic material is processed first by color development, then is contacted with a solution that both bleaches and provides redox amplification.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: June 16, 1998
    Assignee: Eastman Kodak Company
    Inventor: Nigel Richard Wildman
  • Patent number: 5756270
    Abstract: 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: Grant
    Filed: September 27, 1996
    Date of Patent: May 26, 1998
    Assignee: Eastman Kodak Company
    Inventor: John Richard Fyson
  • Patent number: 5756268
    Abstract: 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: Grant
    Filed: April 21, 1997
    Date of Patent: May 26, 1998
    Assignee: Agfa-Gevaert AG
    Inventors: Edgar Draber, Rudolf Tromnau, Manfred Peters
  • Patent number: 5741631
    Abstract: 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: Grant
    Filed: January 9, 1997
    Date of Patent: April 21, 1998
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 5731135
    Abstract: 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: Grant
    Filed: January 30, 1997
    Date of Patent: March 24, 1998
    Assignee: Eastman Kodak Company
    Inventors: Peter Jeffery Twist, Christopher John Winscom
  • Patent number: 5707786
    Abstract: 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: Grant
    Filed: July 8, 1996
    Date of Patent: January 13, 1998
    Assignee: Agfa-Gevaert
    Inventors: Arno Schmuck, Jorg Hagemann, Norman Klaunzer
  • Patent number: 5702873
    Abstract: 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: Grant
    Filed: April 10, 1996
    Date of Patent: December 30, 1997
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 5702874
    Abstract: 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: Grant
    Filed: September 27, 1996
    Date of Patent: December 30, 1997
    Assignee: Eastman Kodak Company
    Inventors: John Richard Fyson, Gareth Bryn Evans
  • Patent number: 5695913
    Abstract: 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: Grant
    Filed: February 28, 1996
    Date of Patent: December 9, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koichi Nakamura, Koki Nakamura, Kiyoshi Takeuchi
  • Patent number: 5686229
    Abstract: 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: Grant
    Filed: September 13, 1996
    Date of Patent: November 11, 1997
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 5670300
    Abstract: A redox amplification photographic process comprises a sulfite fixing step after development-amplification and prior to peroxide bleaching.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: September 23, 1997
    Assignee: Eastman Kodak Company
    Inventors: John Richard Fyson, Gareth Bryn Evans
  • Patent number: 5629139
    Abstract: 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: Grant
    Filed: October 3, 1995
    Date of Patent: May 13, 1997
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 5563021
    Abstract: A photographic element comprising a light sensitive silver halide emulsion sensitized with a dye of formula (I) and a nucleating agent or amine booster associated with the silver halide emulsion: ##STR1## wherein: R.sub.3 is an alkyl group, alkenyl group, or aryl groupR.sub.4 and R.sub.5 are each hydrogen, an alkyl group, alkenyl or aryl group;R.sub.6, R.sub.7 and R.sub.8 are, independently, an alkyl group, alkenyl group, aryl group, or H;the dye has at least three acid or acid salt substituents; andeach L independently represents a methine group;p is 0 or 1;Z.sub.1 represents the atoms necessary to complete a 5- or 6-membered heterocyclic ring group;(X).sub.n represents counterions as needed to balance the charge on the molecule.The present invention also provides a process for forming a high contrast photographic image on a photographic element having a light sensitive silver halide emulsion sensitized with a dye of formula (I).
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 8, 1996
    Assignee: Eastman Kodak Company
    Inventors: Julia Pich, John M. Higgins, John D. Mee
  • Patent number: 5547816
    Abstract: A method of photographic color processing which comprises a bleach step wherein the bleach solution comprises hydrogen peroxide, or a compound which releases hydrogen peroxide, and halide ions and which has a pH in the range of 5 to 11 and bleach solutions therefore.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: August 20, 1996
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Peter D. Marsden
  • Patent number: 5538834
    Abstract: A method is disclosed for developing an image in a photographic element comprising a support, a silver halide emulsion containing an imagewise distribution of developable silver halide grains, and a blocked photographically useful compound comprising a photographically useful group and a blocking group capable of releasing the photographically useful group upon processing the photographic element in the presence of a peroxide, wherein the blocking group comprises an electrophilic group which is solely capable of undergoing a nucleophilic displacement reaction, the electrophilic group being bonded directly or through a releasable timing group to the photographically useful group, with the proviso that when the photographically useful group is a development inhibitor, the blocking group is bonded to the photographically useful group through at least one releasable timing group. The method comprises the step of contacting the photographic element with a processing solution comprising a peroxide.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: July 23, 1996
    Assignee: Eastman Kodak Company
    Inventors: J. Michael Buchanan, Jared B. Mooberry, John Texter
  • Patent number: 5534395
    Abstract: A method of processing a silver halide color photographic material by processing with a color developing solution an imagewise exposed silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and immediately thereafter processing said photographic material with a bleach-fixing solution, wherein said bleach-fixing solution contains an imidazole compound represented by the following formula (.alpha.) and the replenishment rate of said bleach-fixing solution is 200 ml or less per m.sup.2 of the photographic material: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, or an alkenyl group.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 9, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsushige Kamada, Kazuaki Yoshida
  • Patent number: 5466562
    Abstract: 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 introd
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: November 14, 1995
    Assignee: Eastman Kodak Company
    Inventor: Peter D. Marsden