Antisludgant Patents (Class 430/488)
  • Patent number: 6927021
    Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula X—R1—CONH-A-S—S—B—NHCO—R2—Y??(I) wherein A and B are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; R1 and R2 are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; X and Y are each independently a solubilizing group; and compounds having the formula X—R1—CONH-A-S-M??(II) wherein A, R1 and X are as defined above, and M is either a hydrogen atom or a cationic species if the sulfur atom is in its ionized form.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: August 9, 2005
    Assignee: Eastman Kodak Company
    Inventors: Paul M. Magee, Brian J. Parker, Nicholas A. Pightling
  • Publication number: 20040197716
    Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula
    Type: Application
    Filed: April 28, 2004
    Publication date: October 7, 2004
    Inventors: Paul M. Magee, Brian J. Parker, Nicholas A. Pightling
  • Patent number: 6764814
    Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula X—R1—CONH—A—S—S—B—NHCO—R2—Y  (I) wherein A and B are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; R1 and R2 are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; X and Y are each independently a solubilising group; and compounds having the formula X—R1—CONH—A—S—M  (II) wherein A, R1 and X are as defined above, and M is either a hydrogen atom or a cationic species if the sulfur atom is in its ionized form.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: July 20, 2004
    Assignee: Eastman Kodak Company
    Inventors: Paul M. Magee, Brian J. Parker, Nicholas A. Pightling
  • Patent number: 6740479
    Abstract: A silver halide photographic processing solution comprising at least one polymeric compound inhibiting sludge formation and preventing “pi-line” artefact, more particularly in radiographic non-destructive testing applications, wherein said polymeric compound comprises at least one monomer unit having a silver complexing moiety and at least one monomer unit having a solubilizing group, and wherein both said silver ion complexing moiety and said solubilizing group are comprised in same or different monomer units.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: May 25, 2004
    Assignee: Agfa-Gevaert
    Inventors: Johan Loccufier, Frank Louwet, André Roefs
  • Patent number: 6653060
    Abstract: A method for processing a silver halide light-sensitive material employing an automatic processing machine is disclosed. A developer comprises compounds represented by the formula (1), and a fixer comprises thiosulfate salts, water-soluble aluminum salts, and at least one type of crystallization retarding agents and substantially comprises no boron compound. wherein Q represents —CH2CH2— or —CH2CH(J)—, wherein J represents a hydrogen atom or an alkyl group. x+y+Z is between 2.8 and 3.2, and R represents the group described below. Staining of the water washing tank and processing unevenness caused by a decrease in the replenishment rate of a fixer, are minimized during photographic processing employing an automatic processing machine.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: November 25, 2003
    Assignee: Konica Corporation
    Inventor: Shoji Nishio
  • Publication number: 20020155396
    Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula
    Type: Application
    Filed: January 18, 2002
    Publication date: October 24, 2002
    Applicant: Eastman Kodak Company
    Inventors: Paul M. Magee, Brian J. Parker, Nicholas A. Pightling
  • Patent number: 6432625
    Abstract: A method has been described for processing an exposed black-and-white silver halide photographic film material comprising in a hydrophilic light-sensitive layer thereof a binder and silver halide grains being {111} or {100} tabular silver bromo(chloro)iodide or silver chloro(bromo)iodide grains having an average aspect ratio of from 1.2 to 50 and having a silver iodide content of less than 3 mole % based on silver with at least part of it at their grain surface, said method comprising the steps of developing in a developer, fixing in a fixer, rinsing and drying, characterized in that in said developing step the developer comprises an alkali soluble agent having preventing silver dissolution properties, being a mercapto azole compound as presented herein.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: August 13, 2002
    Assignee: Agfa-Gevaert
    Inventors: Ann Verbeeck, Govert Wim De Baecke, Johan August Loccufier, Kathy Gaby Elst, André Cornelius Roefs, Freddy Hendrickx
  • Patent number: 6340560
    Abstract: 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: Grant
    Filed: October 7, 1998
    Date of Patent: January 22, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadashi Inaba, Kiyoshi Morimoto, Shigeo Hirano
  • Patent number: 6238854
    Abstract: A black-and-white silver halide developer composition has been disclosed comprising, besides one or more developing agent(s), agent(s) preventing oxidation thereof and agent(s) providing pH buffering, at least one silver complexing agent, characterized in that said silver complexing agent has a silver complexing stability ratio of at least 70% and, besides said silver complexing agent, at least one agent preventing silver dissolution characterized in that said agent preventing silver dissolution, if present in an amount of 50 mg/l of developer, makes silver content of the developer decrease in an amount of more than 50% versus in the absence thereof, without loss in speed in an amount of more than 0.10 log Exposure after processing in said developer composition.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: May 29, 2001
    Assignee: Agfa-Gevaert
    Inventors: Benny Jansen, Govert De Baecke, Frank Michiels, Johan Loccufier, Ton Rutges
  • Patent number: 6200739
    Abstract: A processing method comprising the steps of: imagewise exposing a silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer; and developing the exposed photographic material, wherein said development is carried out in the presence of a compound represented by formula (I): wherein D and E each represents a —CH═ group, a —C(R0)═ group or a nitrogen atom wherein R0 represents a substituent; and R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a halogen atom or a substituent bonded to the ring by any of a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom or a phosphorus atom, provided that at least one of R1, R2, R3 and R0 has an —SM group (wherein M represents an alkali metal atom, a hydrogen atom or an ammonium group), and when only one of E and D represents a nitrogen atom, E represents a nitrogen atom, D represents a —CH═ group or a &mdas
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: March 13, 2001
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kazuki Yamazaki
  • Patent number: 6096488
    Abstract: Processing a silver halide color photographic material comprising color developing, desilvering and water washing and/or stabilizing. In this process, a photographic material which has at least one emulsion layer containing a high silver chloride content, and at least one emulsion layer containing a monodisperse emulsion, is continuously processed with a color developing solution containing a water-soluble high polymer compound. The coated amount of silver in the photographic material is preferably 0.75 g/m.sup.2 or less. The color developing solution preferably has a chloride ion content of 0.035 mol/l or more. The water soluble high polymer compound can be a polyester, polyamide, polyurethane, polyether, polycarbonate or a natural high polymer compound, or their derivatives. It is obtained by polymerizing or copolymerizing a monomer containing a copolymerizable ethylene type unsaturated group. The high polymer compound is preferably added in the amount of 0.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: August 1, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Kazuaki Yoshida, Hiroshi Fujimoto, Junichi Yamanouchi, Tomokazu Yasuda
  • Patent number: 6096489
    Abstract: A photographic color developing composition includes a color developing agent and at least 0.005 g/l of an anti-tar agent. Such anti-tar agents include a fluoroalkylpolyethyleneoxy alcohol, polyvinyl alcohol, a polyethylene glycol, a free acid of an organic phosphate ester or a salt thereof, or a polyethyleneoxide(20) sorbitan monooleate Inclusion of these agents has been found to significant reduce or elimination tar formation during the processing of color photographic materials, especially color motion picture films.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: August 1, 2000
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, John S. Badger, Frank A. Pettrone
  • Patent number: 6063540
    Abstract: Provided is a method for making a lithographic printing plate in which the development is carryied out by coating a developer on a photosensitive element comprising a support and at least a silver halide emulsion layer and a physical development nuclei layer, characterized in that coating amount of the developer is 60 ml or less for 1 m.sup.2 of the photosensitive element, and the developer contains at least one thioether compound and at least one alkanolamine compound as silver halide solvents. The resulting lithographic printing plate is high in printing endurance and has no stains in non-image portions. Furthermore, the running development processing can be stably carried out.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: May 16, 2000
    Inventors: Hiroyuki Kurokawa, Toshiro Kondo
  • Patent number: 6048675
    Abstract: A development processing method comprising a step of developing a silver halide photographic material having at least one silver halide emulsion layer with a developing solution containing a hydroquinone developing agent, wherein said developing solution has a pH of from 9.0 to 11.0, and contains a compound represented by formula (I) and a compound represented by formula (II) in a concentration ratio of the compound represented by formula (II)/the hydroquinone developing agent of from 0.03 to 0.12: ##STR1## wherein the symbols in these formulae are defined in the specification.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: April 11, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Hirano, Kohzaburoh Yamada
  • Patent number: 6030757
    Abstract: A black-and-white silver halide photographic material is disclosed, said material comprising a support and on both sides thereof two light-sensitive emulsion layers and a protective antistress layer as an outermost layer, wherein per side of the support a total amount of silver, expressed as equivalent amount of silver nitrate of at least 5 g is coated, wherein the light-sensitive emulsion layer more close to the said outermost layer is provided with at least one spectrally sensitized silver halide emulsion having tabular emulsion crystals with {111} or {100} major faces, and wherein the emulsion layer more close to the said support is provided with at least one non-spectrally sensitized emulsion having essentially cubic silver halide emulsion crystals, characterized in that the said cubic emulsion crystals or the said tabular emulsion crystals or both have a halide composition including bromide.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: February 29, 2000
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Luc Heremans, Ann Verbeeck
  • Patent number: 6013423
    Abstract: A developing solution for silver halide photographic material contains a six-membered heterocyclic compound having two nitrogen atoms as the constituent atoms of the six-membered ring and mercapto group, hydroxyl group and at least one substituent group other than hydrogen atom and a five-membered heterocyclic compound having two to three nitrogen atoms as the constituent atoms of the five-membered ring and at least one mercapto group. There is also disclosed a method for processing a silver halide photographic material with said developing solution.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: January 11, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Hirano, Kiyoshi Morimoto, Tetsuo Yoshida, Kunio Ishigaki
  • Patent number: 6001544
    Abstract: Disclosed is a method for forming a color image which comprises color development processing a silver halide color photographic material with an alkaline processing solution substantially free of a color-forming developing agent by using a coating apparatus comprising a plurality of nozzle pores for coating by jetting droplets of the processing solution, wherein three droplets in contiguous to each other jetted from the nozzle pores are coated so as not to leave space among the three droplets coated on said photographic material, wherein said photographic material comprises a support having provided thereon at least one photographic constituting layer, said at least one photographic constituting layer containing at least one dye-forming coupler and at least one color-forming reducing agent selected from the group consisting of color-forming reducing agents represented by formulas (I), (II) and (III) defined in the specification.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: December 14, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiyuki Makuta, Kazuo Sanada, Tsutomu Takatsuka
  • Patent number: 5994040
    Abstract: A processing composition for silver halide photographic light-sensitive material, which comprises at least one compound represented by the following formula (A), (A-I) or (A-II) and at least one compound represented by the following formula (B): ##STR1## Also disclosed are a developer prepared from the processing composition, and a processing method using the developer.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: November 30, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinnichi Morishima, Kohzaburoh Yamada, Seiji Yamashita, Minoru Sakai, Kouta Fukui, Eiichi Okutsu
  • Patent number: 5976758
    Abstract: A development processing method which comprises the steps of: imagewise exposing a silver halide photographic light-sensitive material; and developing the exposed photographic material with a developing solution, wherein the silver halide photographic material comprises a support having thereon at least one light-sensitive silver halide emulsion layer, at least one of the silver halide emulsion layer and other hydrophilic colloidal layers containing at least one hydrazine derivative; and wherein the developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5 and contains (1) at least one ascorbic acid developing agent, (2) at least one 1-phenyl-3-pyrazolidone auxiliary developing agent and (3) a compound represented by the following formula (I): ##STR1## wherein R.sub.1 to R.sub.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 2, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouta Fukui, Senzo Sasaoka, Kohzaburoh Yamada
  • Patent number: 5972580
    Abstract: A development processing method comprises: exposing a silver halide light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer; and developing said exposed light-sensitive material with a developing solution, wherein at least one of said silver halide emulsion layer and other hydrophilic colloidal layers contains at least one hydrazine derivative, and wherein said developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5, and contains (1) at least one ascorbic acid derivative developing agent, (2) at least one aminophenol auxiliary developing agent and (3) a specific mercaptopyrimidine compound. The processing method provides a high-contrast image required in the field of graphic arts using a developing solution having no problem with respect to the ecosystem and working environment, without causing silver stain even at a low replenishment rate.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: October 26, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouta Fukui, Kohzaburoh Yamada
  • Patent number: 5962202
    Abstract: A method for processing a black-and-white silver halide photographic light-sensitive material. The method comprises the steps of (1) developing the black-and-white photographic light-sensitive material containing a quaternary onium compound with a developer containing ascorbic acid or a derivative thereof and having a pH value of from 8.0 to 10.0, (2) fixing the light-sensitive material, (3) washing the light-sensitive material by an automatic processor having a multi-step counter flow washing system, and (4) drying the light-sensitive material.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: October 5, 1999
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Patent number: 5948603
    Abstract: Disclosed is a method of processing an exposed black and white photographic light-sensitive material employing an automatic processor, the method comprising the steps of developing the exposed material with a developer, the developer is replenished with a developer replenisher; fixing the developed material with a fixer; washing the fixed material; and drying the washed material, wherein the developer contains a developing agent, a compound represented by the following formula (III) and at least one of a compound represented by the following formula (I) and a compound represented by the following formula (II): ##STR1##
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: September 7, 1999
    Assignee: Konica Corporation
    Inventors: Shinji Uchihiro, Shoji Nishio
  • Patent number: 5928846
    Abstract: A method for processing a silver halide photographic light-sensitive material is disclosed. The processing method comprises the step of (1) developing a silver halide photographic light-sensitive material which comprises a support having thereon a silver halide emulsion layer and a hydrophilic colloid layer adjoining with the silver halide emulsion layer, and at least one of the silver halide emulsion layer and the hydrophilic colloid layer contains a phosphazene compound and a compound represented by the following Formula 1 or 2 by a developing solution and (2) fixing the silver halide photographic light-sensitive material by a fixing solution, ##STR1## wherein R.sub.1 and R.sub.2 are each independently a hydroxyl group, a mercapto group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonyl group or an alkylthio group, and Z is a group of atoms necessary to form a 5- or 6-member ring, ##STR2## wherein R is an aryl group, R.sub.3, R.sub.4, R.sub.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: July 27, 1999
    Assignee: Konica Corporation
    Inventors: Hirobumi Yamashita, Naoko Fukuwatari, Toshiyuki Marui
  • Patent number: 5910391
    Abstract: Disclosed is a process for making a lithographic printing plate, which comprises subjecting a lithographic printing material having physical development nuclei between an aluminum support and a silver halide emulsion layer to exposure and then processing the lithographic printing material at least with a developing solution, a water washing solution and a finishing solution in this order, wherein the processing with the water washing solution is carried out by using a water washing solution containing a compound having a mercapto group or a thione group.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: June 8, 1999
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Toshiro Kondo, Yutaka Araki, Hajime Fujioka, Makiko Oko
  • Patent number: 5882847
    Abstract: A color light-sensitive material advantageous in that a ratio of .gamma. in a short time processing using a color developer containing a silver halide solvent to .gamma. in a standard time processing using a color developer containing no silver halide solvent is from 0.8 to 1.2 in any case of yellow, magenta and cyan and an image formation method using the same.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: March 16, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akimitsu Haijima, Toshihiro Nishikawa
  • Patent number: 5853950
    Abstract: Disclosed is a process for making a lithographic printing plate by subjecting a lithographic printing material having physical development nuclei between an aluminum support and a silver halide emulsion layer to exposure and then processing the lithographic printing material at least with a developing solution and a water washing solution in this order, which comprises performing the processing(s) with the developing solution and/or the water washing solution by using the developing solution and/or the water washing solution containing an organic compound which coagulates gelatin.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: December 29, 1998
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Toshiro Kondo, Makiko Oko, Yutaka Araki, Hajime Fujioka
  • Patent number: 5851723
    Abstract: Disclosed is a process for making a lithographic printing plate which utilizes the silver complex diffusion transfer process by subjecting the lithographic printing plate to exposure and then development processing and optionally stabilizing processing, which comprises performing the development processing/the stabilizing processing by using a developing solution/a stabilizing solution each containing a monothioether compound containing succinic acid, a salt thereof or a derivative thereof.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: December 22, 1998
    Assignee: Mitsubishi Paper Mills Limited
    Inventor: Toshiro Kondo
  • Patent number: 5840472
    Abstract: A developer for a silver halide photographic photosensitive material containing at least one of monocyclic dimercaptotriazine compounds, bis-type dimercaptotriazine compounds, mercapto-1,2,4-triazine compounds and dimercaptopyrimidine compounds, and a process for developing a silver halide photographic photosensitive material using the developer. The compounds of the present invention provides excellent effect in preventing silver stains without affecting the photographic properties of the photographic material.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: November 24, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hirotomo Sasaki, Harumi Watanabe, Kohzaburoh Yamada
  • Patent number: 5840471
    Abstract: A method for processing a silver halide photographic light-sensitive material is disclosed.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: November 24, 1998
    Assignee: Konica Corporation
    Inventors: Naoko Fukuwatari, Eiichi Ueda, Yasuo Kurachi
  • Patent number: 5830626
    Abstract: A processing composition includes a combination of two different mercapto-substituted anti-sludging agents. The first compound is a conventional mercapto-substituted compound, and the second compound is a mercapto thiadiazole glycerol propoxylate having the formula I: ##STR1## This processing composition can be used to provide black-and-white development of both color reversal and black-and-white photographic elements, and particularly in high contrast graphic arts films.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: November 3, 1998
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, John S. Badger, Ronald J. Nothnagle, Jerry L. Willer
  • Patent number: 5824458
    Abstract: A one-part liquid developer for a black and white silver halide photographic material, comprising:i) an ascorbic acid or derivative thereof as a developing agent,ii) an auxiliary developing agent having super-additivity,iii) an alkali agent necessary for giving a pH of about 9, andiv) a compound for enhancing development.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: October 20, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Eiichi Okutsu, Rikio Inoue
  • Patent number: 5821040
    Abstract: Disclosed is a method for developing a silver halide photographic material, which comprises processing the silver halide photographic material having at least one silver halide emulsion layer containing silver halide grains, with a substantially hydroquinone-free developing solution containing (i) a compound represented by formula (A) as a developing agent, wherein at least 50% of the sum of the projected area of the silver halide grains are tabular silver halide grains having an aspect ratio of 3.0 or more, and said developing solution contains (ii) a compound represented by formula (B): ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; and ##STR2## wherein X represents an oxygen atom or a sulfur atom, Y represents a hydrogen atom or a substituent group, and M represents a hydrogen atom, an alkali metal ion, a quaternary ammonium ion or a quaternary phosphonium ion.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: October 13, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Eiichi Okutsu, Shinnichi Morishima
  • Patent number: 5804358
    Abstract: A solid developing composition for a silver halide black-and-white photographic light sensitive material is disclosed, comprising a developing agent selected from the group consisting of a dihydroxybenzene compound and a compound represented by formula (A), and the developing composition further comprising a compound represented by formula (1). ##STR1##CH.sub.3 (CH.sub.2).sub.n --(O).sub.m SO.sub.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: September 8, 1998
    Assignee: Konica Corporation
    Inventors: Hideki Komatsu, Shoji Nishio
  • Patent number: 5773202
    Abstract: A simple and effective bleaching method includes the use of a bleaching solution including a peroxide bleaching agent and chloride ion in an amount of at least 0.35 mol/l. An organic phosphonic acid or tertiary aminocarboxylic acid can also be present for stability. The method is useful for bleaching color photographic films containing at least 20 mol % silver bromide and from 0 to about 0.5 mol % silver iodide in at least one silver halide emulsion.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: June 30, 1998
    Inventors: Shirleyanne Elizabeth Haye, Terrence Robert O'Toole, David Leroy Cole, John Michael Buchanan
  • Patent number: 5763147
    Abstract: A simple and effective peroxide bleaching method includes the use of a bleaching solution including a peroxide bleaching agent and chloride ion in an amount of at least 0.35 mol/l. An organic phosphonic acid or tertiary aminocarboxylic acid can also be present for stability. The method is useful for bleaching high silver bromide color negative photographic films containing at least 80 mol % silver bromide and from 0.5 to 5 mol % silver iodide in at least one silver halide emulsion.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: June 9, 1998
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne Elizabeth Haye, Cheryl Ann Wilson-Bonner, Karen Ruth Ballou
  • Patent number: 5756253
    Abstract: There are described novel photographic processing compositions, film units and processes for use in diffusion transfer photographic systems. More particularly, there is described a method for forming a diffusion transfer image photographic processing of diffusion transfer photographic film units in the presence of hypoxanthine and inosine. Diffusion transfer photographic systems utilizing the novel photographic element or method of the present invention exhibit substantially fewer, if any, crystals on the final image of the finished photograph post-processing.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: May 26, 1998
    Assignee: Polaroid Corporation
    Inventors: Robert D. Eckert, Michael P. Filosa, Gerard Gomes, Anthony R. Layne, Marlene C. Schwarz, Lloyd D. Taylor
  • Patent number: 5747229
    Abstract: A solid developing composition for processing a silver halide photographic light sensitive material is disclosed which contains a compound represented by the following formula (1) and a compound represented by the following formula (2): formula (1) ##STR1## formula (2) ##STR2##
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: May 5, 1998
    Assignee: Konica Corporation
    Inventor: Takuji Hasegawa
  • Patent number: 5725998
    Abstract: A method of developing an exposed black and white silver halide photographic light-sensitive material with developer using an automatic processor is disclosed, the developing comprising supplying replenisher for developer in an amount of not more than 200 ml per m.sup.2 of the material, the material containing a hydrazine derivative and an infectious development nucleation agent, and the developer having a pH value of 10.0 to 11.2 and containing a dihydroxy benzene compound, a 3-pyrazolidone compound or an aminophenol compound, a sulfite of 0.3 to 1.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: March 10, 1998
    Assignee: Konica Corporation
    Inventor: Takeshi Sanpei
  • Patent number: 5723267
    Abstract: A silver halide photographic material comprising a photographic material constituting layer, which is processed with a developer containing as a developing agent a reductone represented by formula (I) ##STR1## wherein R represents a hydrogen atom or a hydroxyl group, andn represents an integer of from 1 to 4,wherein the photographic material constituting layer contains a calcium compound in an amount of not more than 10 mg/m.sup.2 of the photographic material in terms of calcium.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: March 3, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Tadashi Ito
  • Patent number: 5707787
    Abstract: A processing solution for processing an exposed silver halide photographic light-sensitive material comprises a compound represented by the following formula (A): ##STR1## wherein A.sub.1, A.sub.2, A.sub.3 and A.sub.4 each represent --COOM.sub.1, --OH, --PO.sub.3 M.sub.1 M.sub.2 or --CONH.sub.2 in which M.sub.1 and M.sub.2 each represent a hydrogen ion, an alkali metal ion or another cation; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent a hydrogen atom, a lower alkyl group or a hydroxyl group; n.sub.1, n.sub.2, n.sub.3 and n.sub.4 each represent an integer of 0, 1 or 2, provided that none of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen atoms when n.sub.1 +n.sub.2 =1 and n.sub.3 +n.sub.4 =1; and X represents a substituted or unsubstituted alkylene group having 2 to 6 carbon atoms or --(B.sub.1 O)m-B.sub.2 -- in which B.sub.1 and B.sub.2 each represent a substituted or unsubstituted alkylene group having 1 to 5 carbon atoms, and m is an integer of from 1 to 4.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: January 13, 1998
    Assignee: Konica Corporation
    Inventors: Kenji Kuwae, Yutaka Ueda
  • Patent number: 5707790
    Abstract: A developing composition for a silver halide black-and-white photographic light sensitive material is disclosed, comprising a compound represented by formula (1) and a compound represented by formula (2) or (3): ##STR1##
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: January 13, 1998
    Assignee: Konica Corporation
    Inventor: Hiroyuki Yanagisawa
  • Patent number: 5691108
    Abstract: A process for developing a silver halide photographic light-sensitive material is disclosed, comprising processing, after exposure, a silver halide photographic light-sensitive material which comprises a support having thereon at least one light-sensitive silver halide emulsion layer, the emulsion layer or other hydrophilic colloid layer containing a hydrazine-base nucleating agent having an anionic group in the vicinity of the hydrazine group or a nonionic group of forming an intramolecular hydrogen bond with the hydrogen atom of the hydrazine, or containing at least one hydrazine nucleating agent selected from the compounds represented by formula (I), and a nucleating accelerator, with a developer having a pH of from 9.0 to 11.0 and containing:(1) from 0.2 to 0.75 mol/l of a dihydroxybenzene-base developing agent,(2) from 0.001 to 0.06 mol/l of a 1-phenyl-3-pyrazolidone-base or p-aminophenol-base auxiliary developing agent,(3) from 0.3 to 1.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: November 25, 1997
    Assignee: Fuji Photo Film Co., LTD.
    Inventors: Mitsunori Hirano, Kouta Fukui
  • Patent number: 5683859
    Abstract: An improved photographic developing composition, for use in development of a black-and-white silver halide photographic element, is comprised of at least one developing agent and, in an amount sufficient to inhibit sludge deposition, mercapto thiadiazole glycerol propoxylate. The developing composition is broadly useful in black-and-white development but is most advantageously employed in a process for forming a high-contrast image utilizing a silver halide photographic element comprising a hydrazine compound which functions as a nucleating agent and an amino compound which functions as an incorporated booster.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: November 4, 1997
    Assignee: Eastman Kodak Company
    Inventors: Ronald Joseph Nothnagle, Jeffrey Richard Sefl, Harold Ihor Machonkin
  • Patent number: 5660972
    Abstract: Disclosed is a method for developing silver halide photographic photosensitive materials with a developer containing a sulfite wherein said developer contains 20 mol % or more of potassium ion based on the total alkali metal ions, 0.04 mol/l or more of bromine ion or a compound represented by the following formula (I): ##STR1## wherein R.sub.1 represents a hydroxyalkyl group having 2-10 carbon atoms and R.sub.2 and R.sub.3 each represent a hydrogen atom, an alkyl group having 1-10 carbon atoms or a hydroxyalkyl group having 2-10 carbon atoms and the developer is filtered by a filter containing physical development nuclei before, during or after development of the photosensitive materials with the developer. The method is especially effective in processing using an automatic processor. According to the present method, formation of silver sludges is effectively inhibited and thus, stain of roll and belt of the processors can be prevented.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: August 26, 1997
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Hideto Kiyama, Tamotu Iwata, Yukinao Kawamata, Susumu Baba
  • Patent number: 5658715
    Abstract: A silver halide color reversal photographic light-sensitive material processing method which forms a color reversal image by performing first black-and-white development, fogging process, color reversal development, and desilvering process by using a color reversal developer with a composition containing a non-dye-forming competing coupler, a silver halide fogging agent, and a carboxybenzenesulfonic acid compound and not containing hydroxylamine or its derivative.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: August 19, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Nakamura, Yasuhisa Ogawa
  • Patent number: 5648205
    Abstract: A processing method for a silver halide photographic material is described, which comprises developing an exposed silver halide photographic material with a developing solution comprising:(a) an ascorbic acid developing agent,(b) an auxiliary developing agent exhibiting superadditivity,(c) an alkali agent necessary to maintain the pH from 9.2 to 9.8, and(d) a carbonate in a concentration from 0.30 mol/liter to 0.60 mol/liter.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: July 15, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Eiichi Okutsu
  • Patent number: 5607819
    Abstract: There is disclosed a color developer and a method for processing a silver halide color photographic material using said color developer. The color developer comprises a thiourea compound represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted cycloalkylene group, provided that two or more of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each do not represent a hydrogen atom at the same time; at least one pair of R.sub.1 and R.sub.3, and R.sub.2 and R.sub.4, together may bond to form a nitrogen-containing heterocyclic ring; or at least one pair of R.sub.1 and R.sub.2, and R.sub.3 and R.sub.4, together may bond to form a ring.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: March 4, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takatoshi Ishikawa
  • Patent number: 5595860
    Abstract: A process for processing a silver halide color photographic material, which comprises developing in a color developer substantially free of sulfite ion and containing an aromatic primary amine color developing agent and at least one phosphorus compound selected from the group consisting of compounds represented by formula (I), formula (I-a) and formula (I-b) and internal salts thereof: ##STR1## wherein R, R' and R" each represents an aliphatic hydrocarbon group or an aryl group; A represents a divalent or trivalent linking group; M, M' and M" each represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, an ammonium or a quaternary ammonium; and m represents 2 when M, M' or M" is monovalent and m is 1 when M, M' and M" is divalent.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: January 21, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Masakazu Yoneyama
  • Patent number: 5593817
    Abstract: A photographic developing solution and a method of developing silver halide materials in the said developing solution is disclosed, the said developing solution comprising hydroquinone in an amount from 0 to 30 g per litre, an auxiliary developer, and silver halide complexing agents in an amount from 0 to 50 g per litre, characterized in that said developer further comprisesin amounts from 0.1 to 5 g per litre a compound corresponding to the formula (I), accompanied by charge compensating anions,Z'N.sup.+ --R--N.sup.+ Z" (I)wherein at least divalent group R contains at least one oxyethylene group and wherein Z' and Z", being the same or different, are composed of enough atoms to form a heterocyclic aromatic 5- or 6-ring;andat least 1 g of a compound corresponding to the formula (II), a precursor thereof, a derivative thereof and/or a metal salt thereof ##STR1## wherein each of A, B and D independently represents an oxygen atom or NR.sup.1 ;X represents an oxygen atom, a sulphur atom, NR.sup.2 ; CR.sup.3 R.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: January 14, 1997
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Freddy Henderickx, Ann Verbeeck, Pascal Meeus, Hieronymus Andriessen
  • Patent number: 5591567
    Abstract: A method of processing a photographic light-sensitive material comprising a backing layer on a support opposite an emulsion layer comprises the steps of exposing the material, developing the exposed material with developer, the developer being replenished with developer replenisher in an amount of not more than 200 ml per m.sup.2 of the material, and fixing the developed material,wherein the backing layer contains in an amount of 5 to 200 mg/m.sup.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: January 7, 1997
    Assignee: Konica Corporation
    Inventors: Hideki Komatsu, Shoji Nishio