Stabilizing Patents (Class 430/372)
  • Patent number: 5856520
    Abstract: A novel substituted benzenedithiol metal complex represented by the general formula (1) is provided. The substituted benzenedithiol metal complex is useful as a singlet oxygen quencher and as an optical data recording medium per se. ##STR1## wherein M is a transition metal; A.sup.+ is a quaternary ammonium group; and R is an organic group selected from the group consisting of organic groups represented by the formulae (i), (ii), (iii) and (iv): ##STR2## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR3## (wherein n is 3, 4 or 5), ##STR4## (wherein R.sup.2 is one of a hydrogen atom and a substitutent having 1 to 4 carbon atoms).
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: January 5, 1999
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Kazuyoshi Hirako, Satoshi Kimura, Michio Suzuki
  • Patent number: 5851741
    Abstract: The present invention provides a method for forming color images by processing in a short period of time color photographic materials containing at least one oil-soluble coupler with a color developer which does not substantially contain benzyl alcohol, wherein a silver halide color photographic material having at least one silver halide emulsion layer on a reflective support, the emulsion layer containing a dispersion of oleophilic fine grains having a mean grain size of 0.25 .mu.m or less, which contain a coupler capable of forming a dye after having been coupled with an oxidation product of an aromatic primary amine developing agent, and at least one high boiling organic solvent having a dielectric constant of 4.00 or more (25.degree. C., 10 KHz). The photographic material is imagewise exposed and then subjected to development with a color developer which contains an aromatic primary amine developing agent but does not substantially contain benzyl alcohol for 2 minutes and 30 seconds or less.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: December 22, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Osamu Takahashi, Hideaki Naruse, Nobuo Sakai
  • Patent number: 5834165
    Abstract: A processing method of a silver halide photographic material by using an automatic processor is disclosed, comprising the steps of developing an exposed photographic material with a developing solution in a developing tank, fixing with a fixing solution in a fixing tank and washing with a washing water or a rinsing solution in a washing tank, wherein the washing water or rinsing solution has the number of funguses of 100 or less per ml.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: November 10, 1998
    Assignee: Konica Corporation
    Inventor: Kazuhiko Hirabayashi
  • Patent number: 5827635
    Abstract: Silver bromoiodide color negative films can be rapidly color developed using heat stabilized color developing solutions kept at high temperatures with minimal changes in the resulting color record densities. These advantages are achieved using specific hydroxylamine derivatives as antioxidants in the color developer solution.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: October 27, 1998
    Assignee: Eastman Kodak Company
    Inventor: David Leroy Cole
  • Patent number: 5763144
    Abstract: The invention relates to a color-photographic recording material which comprises a magenta coupler and, as stabilizer, at least one compound of formula (Ia), (Ib) or (II), where the radicals are as defined in claim 1, and to the novel stabilizers.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Suruliappa Jeganathan
  • Patent number: 5753424
    Abstract: In a process for processing a silver halide color photosensitive material having a transparent substrate each possessing at least one red-sensitive layer, at least one green-sensitive layer, and at least one blue-sensitive layer and containing ferromagnetic fine powder, when a salt content in the final bath is not more than 7000 ppm in the processing stages of water washing and/or stabilization after the color development and desilvering, the deterioration in an S/N ratio of a magnetically recorded information can be drastically improved.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: May 19, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takatoshi Ishikawa
  • Patent number: 5750322
    Abstract: Various photographic films, that have already been photographically processed, can be cleaned or washed using an aqueous wash solution comprising a phospholipid in an amount of at least 50 ppm, to remove dust, dirt, or oily fingerprints. This solution can be particularly useful for rewashing color motion picture films.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: May 12, 1998
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, John S. Badger, Edward A. Kurz
  • Patent number: 5744288
    Abstract: A color image can be rapidly provided by color developing an imagewise exposed, duplitized color photographic element that has an ISO of at least 25. The duplitized elements have at least one light sensitive silver halide imaging layer or color recording unit on each side of the support.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: April 28, 1998
    Assignee: Eastman Kodak Company
    Inventors: John M. Buchanan, Anne E. Bohan, Richard P. Szajewski
  • 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: 5738978
    Abstract: A method for processing a silver halide color photographic material comprising a step of processing an exposed silver halide color photographic material with an automatic processor, a color developing solution used in the processing step containing triisopropanolamine, and a conveying rate of the automatic processor being 1,100 mm/min. or more.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: April 14, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Jun Noguchi, Kiyoshi Morimoto
  • Patent number: 5723266
    Abstract: A method of processing a photosensitive material is provided in which change in photographic properties is not caused and reading properties for magnetic recording information of a photosensitive material including a magnetic recording layer does not deteriorate. In the method of processing a photosensitive material using a photosensitive material processing apparatus in which a photosensitive material is immersed in processing solutions respectively accommodated in a plurality of processing tanks which are provided adjacent to each other along a direction in which the photosensitive material is conveyed, the photosensitive material processing apparatus includes a conveying roller pair for conveying the photosensitive material, which is provided in at least one portion of the processing apparatus, and a partition portion which is partitioned by a roller provided between adjacent processing tanks of the plurality of processing tanks and which allows the photosensitive material to pass therethrough.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: March 3, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kiyoshi Morimoto
  • Patent number: 5716764
    Abstract: The invention provides a multilayer silver halide color negative photographic element comprising in the same layer a cyan dye of formula (I) and a ballasted stabilizer compound of formula (II), where the respective formulas are: ##STR1## andB--L--A--R (II)wherein:the substiuents are as defined herein the specification.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: February 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: John Brian Rieger, Charles Leo Bauer
  • Patent number: 5716765
    Abstract: Photographic films having a magnetic recording layer are processed using a final processing solution containing a mixture of surfactants. The final processing solution can be a final rinse solution or an image stabilizing solution further containing an image stabilizer. The specific final processing solution composition provides processed films that are free of scum, non-tacky, and resistant to abrasion and fingerprinting on the back side.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: February 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Hugh Gerald McGuckin, John Stuart Badger, Brad Mitchell Boersen
  • Patent number: 5707789
    Abstract: A solid processing composition for a silver halide photographic light-sensitive material is disclosed which comprises a saccharide and a compound selected from the group consisting of a hexamethylenetetramine compound and compounds represented by the following Formulas (I), (G), (H-1), (H-3) and (H-3): ##STR1##
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: January 13, 1998
    Assignee: Konica Corporation
    Inventor: Koji Takemura
  • Patent number: 5700850
    Abstract: A light-stable colored composition which includes a colorant and a radiation transorber. The colorant, in the presence of the radiation transorber, is adapted, upon exposure of the transorber to specific, narrow bandwidth radiation, to be mutable. The radiation transorber also imparts light-stability to the colorant so that the colorant does not fade when exposed to sunlight or artificial light.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: December 23, 1997
    Assignee: Kimberly-Clark Worldwide
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5674671
    Abstract: The invention relates to the use of a fluoropolymer and a fluorochemical surface active agent in combination for improving the antistatic behaviour of surfaces. In one embodiment, the invention provides a light-sensitive material possessing good initial antistatic properties and retaining good properties even after aqueous processing.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: October 7, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Marc Brandon, Dirk H. C. Arren, Rudolph J. Dams
  • Patent number: 5667948
    Abstract: Various photographic films can be rinsed using an aqueous final rinse solution comprising a phospholipid in an amount of at least 50 ppm. This solution can be particularly useful as a final rinse for color motion picture films.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Kodak Company
    Inventors: Hugh Gerald McGuckin, John Stuart Badger, Edward Albert Kurz
  • Patent number: 5652085
    Abstract: Aminosuccinic acid chelants are disclosed which have been found to be applicable in photographic processes. The aminosuccinic acids can be used in a method of bleaching or bleach-fixing a silver halide photographic material comprising contacting the photographic material with a bleaching solution containing at least one metal complex of a polyamino disuccinic acid and one or more metal complexes of a polyamino monosuccinic acid or a monoamino monosuccinic acid.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: July 29, 1997
    Assignee: Eastman Kodak Company
    Inventors: David A. Wilson, Druce K. Crump, Eric R. Brown
  • Patent number: 5645980
    Abstract: An aqueous solution for rinsing silver halide photographic elements comprising a nonionic surfactant and an anionic surfactant, wherein the solution has a surface tension of 32 dynes/cm or less and a method for using the rinsing solution.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: July 8, 1997
    Assignee: Eastman Kodak Company
    Inventors: Hugh Gerald McGuckin, John Stuart Badger, Ronald Anthony Gogle, Paul Joseph Riesenberger, Michael William Orem
  • Patent number: 5633124
    Abstract: This invention provides a process for removal of silver halide from a silver halide photographic recording material by a processing solution with fixing ability (a fixer) containing thiosulfate as a fixing agent conducted in the presence of a thioether compound incorporated within a fixer formulation. It further provides a fixer formulation for use in said process. The fixer contains a maximum ammonium ion concentration of 0.9M.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: May 27, 1997
    Assignee: Eastman Kodak Company
    Inventors: Eric R. Schmittou, Jacob J. Hastreiter, Jr., Stuart T. Gordon
  • 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: 5587277
    Abstract: A solid photographic processing composition in tablet form for a silver halide photographic light sensitive material is provided, wherein at least a part of the surface of said solid processing composition is covere-coated with a compound selected from (i) a polyalkylene glycol having an average molecular weight of 2000 to 20000, (ii) a monosaccharide or disaccharide and (iii) a vinyl polymer having a betaine structure. The tablets of the processing composition are enclosed in a package, and introduced into a processing tank.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: December 24, 1996
    Assignee: Konica Corporation
    Inventors: Hiroshi Yamashita, Yutaka Ueda
  • Patent number: 5578432
    Abstract: A stabilizing bath that provides image stability and uniform drainage of excess fluid to prevent drying spots and that reduces or eliminates the formation of residue on the base side of color negative films is comprised of hexamethylenetetramine, a nonionic polyethoxylated surfactant, and an anionic sulfate or sulfonate surfactant. The stabilizing bath is used as the final processing bath prior to drying. The nonionic surfactant provides uniform drainage of excess fluid and the anionic sulfate or sulfonate surfactant functions to reduce or eliminate the formation of residue on the base side of color negative films.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: November 26, 1996
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, John S. Badger, Michael W. Orem
  • Patent number: 5576151
    Abstract: A processing solution for a silver halide color photographic material, said solution containing at least one kind of compound represented by formula (I) or (III): ##STR1##
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: November 19, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Hiroshi Kawamoto, Shigeru Nakamura
  • Patent number: 5556737
    Abstract: The present invention relates to a method for forming a color image in a silver halide color photographic material comprising a reflective support having coated thereon a composition comprising a polyester resin and a white pigment mixed and dispersed in said polyester resin, at least one yellow color forming silver halide photosensitive emulsion layer, at least one magenta color forming silver halide photosensitive emulsion layer, and at least one cyan color forming silver halide photosensitive emulsion layer on said support, each of said yellow, magenta and cyan color forming silver halide photosensitive emulsion layers having silver halide grains containing 95 mol % or more of silver chloride, wherein said method comprises the steps of exposing imagewise said silver halide color photographic material to light, developing said imagewise exposed silver halide color photographic material in a color developing solution, subjecting said developed silver halide color photographic material to desilvering by bleac
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: September 17, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Koichi Nakamura
  • Patent number: 5552264
    Abstract: A conditioning or bleach accelerating solution can be used to process color photographic films, especially color reversal films, to minimize magenta dye fade while reducing the needed amount of formaldehyde stabilizer. This solution is provided in highly concentrated form and diluted up to 9:1 prior to or during use. The concentrate contains a formaldehyde precursor at 200 to 450 g/l, a sulfite at from 40 to 100 g/l, a bleach accelerating agent at 1.5 to 13.5, and a metal ion chelating agent at 5 to 45 g/l.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: September 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: Ann M. Cullinan, Charles M. Darmon, Rosa P. Sauter, Charles F. Leith
  • Patent number: 5547817
    Abstract: Photographic processing using an additive represented by formula (I): ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon group, an aryl group, or a heterocyclic ring group; R.sub.2 is hydrogen, an aliphatic hydrocarbon group, an aryl group, or a heterocyclic ring group; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 are independently an alkylene group; m and n are independently 0 or 1; W.sup.1 and W.sup.2 are independently an alkylene group, an arylene group, aralkylene group or a divalent nitrogen-containing heterocyclic ring group; D is a single bond, --O--, --S-- or --N(R.sub.w), where R.sub.2 is hydrogen, an aliphatic hydrocarbon group or an aryl group; v is 0 or an integer or from 1 to 3; w is an integer of from 1 to 3; and M.sub.1, M.sub.2, M.sub.3 and M.sub.4 are independently hydrogen or a cation.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: August 20, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Okada, Tadashi Inaba, Ryo Suzuki, Hideaki Nomura
  • Patent number: 5538842
    Abstract: There is disclosed a silver halide color photographic light-sensitive material which excels in a color reproduction and a light fastness at a low density part through a high density part and which is improved in a Y-stain at a background part. The silver halide color photographic light-sensitive material comprises a support and provided thereon at least one photographic constitutional layer, wherein at least one layer of the above photographic constitutional layers contains at least one of the compounds represented by the following Formula (I) and a compound represented by the following Formula (II) in the same layer: ##STR1## wherein R represents a hydrogen atom or a substituent; Z.sub.a, Z.sub.b, and Z.sub.c each represent any group of methine, substituted methine, .dbd.N--, or --NH--; Y represents a hydrogen atom or a group capable of splitting off upon a coupling reaction with an oxidation product of a developing agent; provided that a dimer or a polymer may be formed via R, Y, or Z.sub.a, Z.sub.b or Z.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: July 23, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Osamu Takahashi, Takehiko Sato
  • Patent number: 5534396
    Abstract: A photographic rinse composition has been developed which reduces jamming in the processing of photographic print materials and prevents biological growth on and leaching of materials from the print materials. This composition includes a vinyl pyrrolidone polymer, at least about 0.02 g/l of a biocide mixture comprising 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, and at least about 0.02 g/l of an alkyl ether sulfate surfactant. Cupric ion can also be included to stabilize the biocide mixture.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: July 9, 1996
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, Jerel R. Carli, John S. Badger, Stephen J. Waffle
  • Patent number: 5529890
    Abstract: A stabilizing bath that provides image stability and uniform drainage of excess fluid to prevent drying spots and that reduces or eliminates the formation of residue on the base side of color negative films is comprised of hexamethylenetetramine, a nonionic polyethoxylated surfactant, and an anionic sulfate or sulfonate surfactant. The stabilizing bath is used as the final processing bath prior to drying. The nonionic surfactant provides uniform drainage of excess fluid and the anionic sulfate or sulfonate surfactant functions to reduce or eliminate the formation of residue on the base side of color negative films.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: June 25, 1996
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, John S. Badger, Michael W. Orem
  • Patent number: 5523195
    Abstract: A conditioning or bleach accelerating solution can be used to process color photographic films, especially color reversal films, to minimize magenta dye fade while reducing the needed amount of formaldehyde stabilizer. These advantageous effects are achieved by including a secondary amine in the solution along with a formaldehyde precursor and a bleach accelerator.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: June 4, 1996
    Assignee: Eastman Kodak Company
    Inventors: Charles M. Darmon, Michael P. Youngblood, Rosa P. Sauter
  • Patent number: 5510232
    Abstract: Certain cationic hydroquinones are useful catalysts for persulfate bleaching agents in photographic processing methods. These compounds are oxidizable by persulfate and reducible by silver metal at a pH of from 1 to 7, and have a chemically reversible redox couple of from about -0.20 to about +1.5 volts. The persulate bleaching ability is enhanced by the presence of these compounds which are used in a step prior to bleaching.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: April 23, 1996
    Assignee: Eastman Kodak Company
    Inventor: Terrence R. O'Toole
  • Patent number: 5508150
    Abstract: A method of processing an image wise exposed and developed silver halide photographic element comprising bleaching the photographic element in a bleaching or bleach-fixing solution containing as the primary bleaching agent a complex of ferric ion and a tridentate or a tetradentate ligand, and then processing the photographic element in a solution containing a chelating compound represented by Formula IHOOC(CH.sub.2).sub.m (X) ((CH.sub.2).sub.n COOH).sub.2 (I)whereX is N, or C--OH;n and m are independently 0, 1, or 2; andM is a cationic ion.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: April 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: Mary E. Craver, Janet M. Huston, Robert J. Opitz
  • Patent number: 5508147
    Abstract: Yellowing of a processed photographic element is inhibited by incorporating a scavenger comound capable of reacting with magenta coupler, e.g. an epoxy compound, in a layer adjacent a layer containing the magenta coupler. In a preferred embodiment, the magenta coupler containing layer is sandwiched between layers containing the scavenger compound. Prior to processing at least one of these layers contains a solubilizing agent for the scavenger compound. In preferred embodiments, the processing solution used to process the photographic element containing an external solubilizing agent for the scavenger compound, preferably benzyl alcohol.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: April 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Sundaram Krishnamurthy
  • Patent number: 5508155
    Abstract: Substituted hydroxylamine antioxidants can be prepared by reacting hydroxylamine or a mono-substituted hydroxylamine with an epoxide. The antioxidant reaction product is not removed from the reaction mixture, but is used without separation after combination with a color developer to provide a photographic color developer composition. The antioxidants are highly water soluble and thus exhibit no objectionable odor.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: April 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: Carl A. Marrese, Paul A. Zielinski
  • Patent number: 5508421
    Abstract: A pyrrolotriazole azomethine dye represented by formula (I), (II) or (IV) is disclosed: ##STR1## Also, a heat transfer dye providing material is disclosed, in which the material includes a support having thereon a dye providing layer containing a heat migrating dye, with the dye providing layer containing at least one pyrrolotriazole azomethine dye represented by any of the above formulae (I), (II) and (IV).
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: April 16, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Makoto Suzuki, Hisashi Mikoshiba, Seiiti Kubodera, Osamu Takahashi, Yasuhiro Shimada, Koushin Matsuoka, Shigeru Yamazaki, Katsuyoshi Yamakawa, Kozo Sato
  • Patent number: 5478702
    Abstract: There is disclosed a method for forming a color image using a silver halide color photographic material having three silver halide photosensitive layers and a non-photosensitive layer, on a support, which comprises subjecting said photographic material wherein a compound represented by the formula (I) is contained in a non-photosensitive layer to scanning exposure with an exposure time being 10.sup.-4 sec or less per picture element, and processing said exposed photographic material with a color developer: formula (I) ##STR1## wherein X represents a hydrogen atom, a hydroxyl group, an amino group, or a sulfonamido group, R.sup.11 and R.sup.12 each represent the group defined for X, or an alkyl group, an aryl group, an amido group, a ureido group, an alkylthio group, an arylthio group, an alkoxy group, or an aryloxy group, and R.sup.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 26, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kiyoshi Kawai
  • Patent number: 5476756
    Abstract: Yellowing of a processed photographic element is inhibited by incorporating a scavenger compound capable of reacting with magenta coupler, e.g. an epoxy compound, in a layer adjacent a layer containing the magenta coupler. At least one of these layers contains a solubilizing agent for the scavenger compound. In preferred embodiments, the processing solution used to process the photographic element contains an external solubilizing agent for the scavenger compound, preferably benzyl alcohol.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: December 19, 1995
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Sundaram Krishnamurthy
  • Patent number: 5468604
    Abstract: A stabilized photographic dispersion is prepared by adding a hydrophobic, photographically inert compound which has a logP.sub.(calc) greater than about 9 and does not solidify or gel the dispersed phase to a photographic dispersion comprising an aqueous medium and a dispersed liquid organic phase comprising a photographically useful compound which is (i) soluble in organic solvents, (ii) substantially insoluble in water, and (iii) subject to particle growth of at least 10% of its initial particle size when maintained in said dispersion in the absence of the added photographically inert compound.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: November 21, 1995
    Assignee: Eastman Kodak Company
    Inventors: Paul L. Zengerle, David D. Miller, Thomas H. Whitesides, John B. Rieger, Vincent J. Flow, III, Walter H. Isaac
  • Patent number: 5468598
    Abstract: A process for preparing a stable, solid particle dispersion of a substantially water-insoluble compound useful in imaging, comprises the steps of:(a) forming a coarse aqueous slurry of solid particles of said compound and a hydrophobic, water-soluble or water-dispersible polymer in an amount of 0.1 to 100% by weight based on the weight of said compound; and(b) milling said slurry for time sufficient to provide particles of the desired average particle size;wherein the polymer is an uncharged or weakly anionically charged water-soluble or water-dispersible homopolymer or copolymer in which at least 10 mole % of the repeat units contain an uncharged pendant group that terminates in (a) a CH.sub.3 unit, (b) a ring containing at least two contiguous CH.sub.2 units, or (c) an aromatic group.The resulting dispersion has dispersed solid particles of said compound having the desired small particle size and is stable toward particle agglomeration, particle growth and needle growth.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: November 21, 1995
    Assignee: Eastman Kodak Company
    Inventors: David D. Miller, Mary C. Brick, Mridula Nair
  • Patent number: 5466569
    Abstract: A color photographic material, at least one layer of which contains a compound of the formula (I) ##STR1## in which X means --NH--, --NR-- or --O--,R means alkyl, cycloalkyl or aryl,R.sub.1 means a chemical bond or a divalent bridging member,R.sub.2 and R.sub.3 mean alkyl, alkoxy, alkenyl, cycloalkyl, aryl or aryloxy, or two residues R.sub.2 or R.sub.3 mean the remaining atoms of a benzene ring condensed with the phenyl residue andm and n mean 0 to 3, wherein all alkyl, alkoxy, cycloalkyl, alkenyl, aryl and aryloxy residues may be further substituted and in each of the two phenyl residues a residue R.sub.1, R.sub.2 or R.sub.3 is in para position relative to the oxygen atom, is characterized by improved dye stability after processing.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: November 14, 1995
    Assignee: Agfa-Gevaert AG
    Inventors: Beate Weber, Jorg Hagemann, Markus Geiger
  • Patent number: 5464731
    Abstract: A silver halide color photographic material comprising a support provided thereon at least one light sensitive silver halide emulsion layer and at least one light insensitive layer, wherein the light insensitive layer contains at least one of the compounds represented by Formula (I) and at least one of the compounds represented by Formula (II); and the amount of the compounds represented by Formula (II) in the above light insensitive layer is 15 to 100 mole % of the amount of the compounds represented by Formula (I) in the same light insensitive layer: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represent an alkyl group, provided that a total of carbon numbers of R.sub.1 and R.sub.2 and a total of carbon numbers of R.sub.3 and R.sub.4 each are 16 or more and 60 or less and that a hydroquinone structure is not involved in R.sub.1, R.sub.2, R.sub.3, and R.sub.4.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: November 7, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobutaka Ohki, Naoki Asanuma, Osamu Takahashi
  • Patent number: 5464728
    Abstract: This invention provides a method of processing a developed high iodide color silver halide photographic element by bleaching the element with a peracid bleach and fixing the element with a fixer containing sodium cation and thiosulfate, wherein the amount of ammonium ion in the fixer is less than 1.4M.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: November 7, 1995
    Assignee: Eastman Kodak Company
    Inventors: Richard P. Szajewski, John M. Buchanan
  • Patent number: 5459014
    Abstract: A method for forming a color photographic image is disclosed. The method comprises steps ofimagewise exposing a silver halide color photographic light-sensitive material comprising a support, and a silver halide emulsion layer and a non-light-sensitive layer each provided on the support,developing the light-sensitive material with a color developer, andbleach-fixing the developed light-sensitive material with a bleach-fixing solution,wherein the silver halide emulsion layer or the non-light-sensitive layer contains a compound represented by the following Formula 1 and the color developer contains a chloride in an amount of not less than 6.times.10.sup.-2 moles per liter; ##STR1## wherein R.sub.1 is a tertiary alkyl group; R.sub.2 is a primary or a secondary alkyl group; R.sub.3, R.sub.4 and R.sub.5 are each an alkyl group, an alkoxycarbonyl group, a phenoxycarbonyl group, an alkoxy group, a phenoxy group or a phenylthio group, the groups represented by R.sub.1, R.sub.3, R.sub.4 or R.sub.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: October 17, 1995
    Assignee: Konica Corporation
    Inventors: Toyoki Nishijima, Motoi Nishimura
  • Patent number: 5457019
    Abstract: A silver halid photographic emulsion contains an antioxidizing agent.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: October 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Nozawa, Mitsuhiro Uchida
  • Patent number: 5449593
    Abstract: A processing solution for a silver halide color photographic material, said solution containing at least one kind of compound represented by formula (I), (II), or (III); ##STR1## the substituents are defined in the instant specification.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: September 12, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Hiroshi Kawamoto, Shigeru Nakamura
  • Patent number: 5447826
    Abstract: A photographic light-sensitive silver halide material is disclosed comprising a support and one or more hydrophylic colloid layers including at least one light-sensitive silver halide emulsion layer characterized in that in said emulsion layer is a gold and sulphur sensitized silver bromide or silver bromoiodide emulsion having cubic crystal habit and in that said emulsion and/or a hydrophylic colloid layer in water-permeable relationship therewith comprises a 3-pyrazolidinone compound.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: September 5, 1995
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Luc J. Heremans, Rudi A. Goedeweeck
  • Patent number: 5441852
    Abstract: A method of processing a silver halide color photographic material by exposing the material to light, color developing, processing with a solution having a fixing function and thereafter, stabilizing the material. The stabilizing processing solution is one in for replacing formaldehyde in known processing solutions. The compound that replaces the formaldehyde is a meta substituted benzaldehyde. A method of using the processing solution is also disclosed.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: August 15, 1995
    Assignee: Konica Corporation
    Inventors: Moeko Hagiwara, Hiroaki Kobayashi
  • Patent number: 5441851
    Abstract: A photographic element with a support and a silver halide emulsion layer includes a two-equivalent pyrazolone magenta dye-forming coupler and a heterocyclic nitrogen addendum which is a protic imidazole or a pyridine. The heterocylic nitrogen compound reduces continued coupling of two-equivalent magenta dye-forming couplers after removal from a developer solution, obviating the need for a stop bath after the development stage.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: August 15, 1995
    Assignee: Eastman Kodak Company
    Inventors: Stephen P. Singer, Paul B. Merkel
  • Patent number: 5441861
    Abstract: A color photographic material with at least one silver halide emulsion layer which contains a color coupler distributed in a polymeric oil former and at least one compound of the formula (I) ##STR1## in which R means alkyl, cycloalkyl, alkenyl, aryl, acyl, alkylsulphonyl or arylsulphonyl,R.sub.1 means a chemical bond or a divalent bridging member,R.sub.2 and R.sub.3 mean alkyl, alkoxy, alkenyl, cycloalkyl, aryl or aryloxy or two residues R.sub.2 or R.sub.3 the remaining atoms of a benzene ring condensed with the phenyl residue andm and n mean 0 to 3, wherein all alkyl, alkoxy, cycloalkyl, alkenyl, aryl, aryloxy and acyl residues may be further substituted,is characterized by improved color stability.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: August 15, 1995
    Assignee: Agfa-Gevaert AB
    Inventors: Beate Weber, Gunter Helling, Klaus Walz, Markus Geiger, Kaspar Wingender, Jorg Hagemann