Cyanine Sensitizer Patents (Class 430/576)
  • Patent number: 8409792
    Abstract: Silver halide photographic elements that are color intermediate motion picture films have at least one green sensitive silver halide emulsion that includes a green sensitizing dye that is a cyanine dye having two oxazole groups in the molecule, and another green sensitizing dye having either two imidazole groups in the molecule or one oxazole group and one thiazole group in the molecule. The molar ratio of the first green sensitizing dye to the second green sensitizing dye is from about 4:1 to about 0.3:1. The magenta dye image forming unit has at least one green sensitive silver halide emulsion layer that comprises predominantly cubic silver iodobromide grains having at least 90 mol % bromide and at least 1 mol % iodide, which grains have an average equivalent spherical diameter (ESD) of less than 0.25 ?m.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: April 2, 2013
    Assignee: East Kodak Company
    Inventor: Jeffrey C. Hansen
  • Patent number: 7998665
    Abstract: Silver halide photographic elements that are color intermediate motion picture films have at least one green sensitive silver halide emulsion that includes a green sensitizing dye that is a cyanine dye having two oxazole groups in the molecule, and another green sensitizing dye having either two imidazole groups in the molecule or one oxazole group and one thiazole group in the molecule. The molar ratio of the first green sensitizing dye to the second green sensitizing dye is from about 4:1 to about 0.3:1. The magenta dye image forming unit has at least one green sensitive silver halide emulsion layer that comprises predominantly cubic silver iodobromide grains having at least 90 mol % bromide and at least 1 mol % iodide, which grains have an average equivalent spherical diameter (ESD) of less than 0.25 ?m.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: August 16, 2011
    Assignee: Eastman Kodak Company
    Inventor: Jeffrey C. Hansen
  • Patent number: 7732124
    Abstract: A color-image forming method in a silver halide color photographic light-sensitive material, having the steps of: performing exposure of the light-sensitive material cut into sheets; and subjecting the exposed light-sensitive material sheets to photographic processing, while conveying them with conveying rollers, with the sheet conveying speed being 40.0 to 100 mm/sec; wherein the light-sensitive material to be exposed contains any of: 1) a dye-forming coupler of formula (IA), 2) a compound of formula (I), and 3) 1.4 mg/m2 or more of a compound of formula (II); wherein R? and R? are a substituent; Z is a hydrogen atom, or a coupling split-off group; A is an alkyl group, M is a cation, and R is an atom or group having 100 or lower total molecular weight.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: June 8, 2010
    Assignee: Fujifilm Corporation
    Inventors: Yasuaki Deguchi, Shin Soejima, Naoto Ohshima, Tatsuya Ishizaka, Katsuyuki Takada, Futoshi Yoshida, Atsushi Maruhashi, Yoshinori Morimoto, Takehisa Ohno
  • Patent number: 7476495
    Abstract: A silver halide photosensitive material comprising at least one blue-sensitive layer, at least one green-sensitive layer and at least one red-sensitive layer on a transparent support, wherein a peak wavelength of spectral sensitivity of at least one of the green-sensitive layer is in the range of ?10 nm or more and +10 nm or less in comparison with a peak wavelength of a green light source for exposure.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: January 13, 2009
    Assignee: Fujifilm Corporation
    Inventors: Tetsuo Kikuchi, Yoichi Hosoya, Masaaki Miki, Junichiro Hosokawa, Koichi Yokota, Ryoji Nishimura
  • Patent number: 7303851
    Abstract: Disclosed is a silver halide photographic light-sensitive material wherein a silver halide emulsion layer and/or a hydrophilic colloid layer contains at least one hydrazine derivative, and a silver halide emulsion is spectrally sensitized with a particular dye, and which contains a benzotriazol compound. There is provided a silver halide photographic light-sensitive material that exhibits superior residual color property and can provide stable photographic performance even after a long term running with a reduced silver amount.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: December 4, 2007
    Assignee: Fujifilm Corporation
    Inventors: Mitsunori Hirano, Kunio Ishigaki, Tokuju Oikawa
  • Patent number: 7238467
    Abstract: A silver halide emulsion comprising silver halide grains covered with two dye layers in combination. The two dye layers comprises an inner dye layer adjoining to the silver halide grain, and containing at least one sensitizing dye capable of spectrally sensitizing silver halide, and an outer dye layer adjoining to the inner dye layer, and containing at least two dyes. The light absorption energy of the outer dye layer is equal to or higher than that of the inner dye layer, an energy-releasing wavelength of the outer dye layer overlaps with an energy-absorbing wavelength of the inner dye layer, the sensitizing dyes constituting the inner dye layer include an anion and/or betaine dyes, the dyes constituting the outer dye layer include an anion and cation dyes, and the anion dye is more than the cation dye in terms of an addition amount and/or an adsorption amount.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: July 3, 2007
    Assignee: Fujifilm Corporation
    Inventors: Tadashi Ikeda, Yasushi Tanabe, Hiroshi Kawakami, Takeshi Suzumoto
  • Patent number: 7211373
    Abstract: A photothermographic material comprising a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for a silver ion and a binder on one surface of a support, wherein a silver behenate-content of the non-photosensitive organic silver salt is 40 to 70 mol %, and the photothermographic material comprises a compound that can be one-electron-oxidized to provide a one-electron oxidation product, which further releases at least 1 electron, one of during and after a subsequent reaction.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: May 1, 2007
    Assignee: Fujifilm Corporation
    Inventors: Tomoyuki Ohzeki, Kohzaburoh Yamada
  • Patent number: 7172856
    Abstract: A silver halide photographic light-sensitive material having high sensitivity and having a desired spectral sensitivity distribution. A silver halide photographic light-sensitive material comprising at least one multichromophore dye compound having at least two dye chromophores connected by covalent bonding or coordinate bonding, at least two of the dye chromophores forming a dye chromophore group and the light absorption of the dye chromophore group differing from the sum of individual light absorptions of respective dye chromophores constituting said dye chromophore group.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: February 6, 2007
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takanori Hioki, Hiroo Takizawa, Katsuhiro Yamashita
  • Patent number: 7153644
    Abstract: A silver halide color photosensitive material, which has: at least each one layer of yellow-, magenta- and cyan-color-forming photosensitive silver halide emulsion layers on a reflective support, and at least one non-light-sensitive non-color-forming hydrophilic colloidal layer; wherein at least one of the photosensitive silver halide emulsion layers contains a silver halide emulsion containing 90 mol % or more of silver chloride, and a compound having a repetitive unit of formula (I) is contained: wherein R1 is —OR, —SR or —N—R(—R?), where R and R? are a hydrogen atom, or an alkyl, aryl, aralkyl, cycloalkyl or heterocyclic group, or R and R? may form a saturated carbon ring or a heterocycle; R2 and R3 are a hydrogen atom or an alkyl group; Y1 and Y2 are a polymethylene, arylene or cycloalkylene group; Z is —O—, —SO2— or —CH2—; and m is 0 or 1.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: December 26, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akito Yokozawa, Tetsuo Nakamura, Katsuyuki Takada
  • Patent number: 7083906
    Abstract: A heat-developable photosensitive material having on a support at least one light-sensitive layer comprising an organic silver salt, a light-sensitive silver halide and a reducing agent and at least one light-insensitive layer, which comprises an antihalation dye causing no decoloration by heat and provides tone represented by an inequality L*?92 on the CIELAB space in a background after heat development.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: August 1, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiichi Suzuki, Hideyasu Ishibashi
  • Patent number: 6979529
    Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a support having thereon at least on light-sensitive halide emulsion layer, wherein the emulsion layer contains a compound represented by formula (1).
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: December 27, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Katoh, Hiroo Takizawa
  • Patent number: 6908730
    Abstract: This invention relates to a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith: (a) a first dye (Dye 1) that is a cyanine dye capable of spectrally sensitizing a silver halide emulsion and that has at least one anionic substituent; and (b) a second dye (Dye 2) that is not a cyanine dye and that has at least one cationic substituent. Dye 2 has a log P, excluding any counterion, of less than 4.00 and greater than 1.00 or Dye 2 is represented by a dye of formula II as described herein.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: June 21, 2005
    Assignee: Eastman Kodak Company
    Inventors: Richard L. Parton, Thomas L. Penner, David R. Foster, Stephen A. Hershey
  • Patent number: 6838231
    Abstract: A process for producing a spectrally sensitized silver halide photographic emulsion having high sensitivity. A process for producing a silver halide photographic emulsion comprising as a sensitizing dye at least one connection dye having two or more chromophores connected through a covalent bond, the process comprising adding said connection dye to a silver halide photographic emulsion and allowing at least one chromophore out of a plurality of chromophores in the molecule of the connection dye to change in the adsorption strength to a silver halide grain; and a process for producing a silver halide photographic emulsion comprising a silver halide grain having adsorbed on the surface thereof a sensitizing dye in multiple layers, the process comprising adding one or a plural of sensitizing dye(s) to said silver halide emulsion and allowing at least one sensitizing dye out of added sensitizing dyes to change in the adsorption strength to a silver halide grain.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: January 4, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsumi Kobayashi, Takeshi Suzumoto, Takanori Hioki
  • Patent number: 6815153
    Abstract: This invention relates to a silver halide photographic element comprising a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein said photographic element has an ISO speed rating of 800 or greater and has an integrated RMS green granularity equal to or less than 11.2.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: November 9, 2004
    Assignee: Eastman Kodak Company
    Inventors: James A. Friday, Roger A. Weiss, Anabisdally I. Bodden
  • Patent number: 6806043
    Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein said emulsion layer contains a compound represented by the following formula (1): Dye1&Parenopenst;L1&Parenopenst;Dye2)m1)m2  (1) wherein Dye1 represents a cyanine chromophore, Dye2 represents a merocyanine dye having in the acid nucleus thereof at least one dissociative group having a pKa of 5 or less, and L1 represents a linking group represented by -G1-(A1-G2)t1-(wherein G1 and G2 each independently represents an alkylene, alkenylene or arylene group which may be substituted, A1 represents, irrespective of the direction, —O—, —S—, —SO2—, —NR3—, —COO—, —CONR4— or —SO2NR5— (wherein R3 to R5 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group) and t1 represents an integer of 1 to 1
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: October 19, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiroo Takizawa
  • Patent number: 6794122
    Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide photographic emulsion layer, wherein the emulsion layer contains at least one compound of formulae (Ia), (Ib) and (Ic) and at least one compound of formula (II): wherein Z1 represents S, O, Se, Te, N or C; R, R31 and R32 each are an alkyl, aryl or heterocyclic group; D is a group necessary for forming a methine dye; V1 to V4 represent H or a monovalent substituent; M and M3 each are a charge-balancing counter ion; m and m3 each are a number or 0 or more necessary for neutralizing the charge of the molecule; Z31 and Z32 each are an atomic group necessary for forming the nitrogen-containing hetero-ring; L31 to L37 each represent a methine group; p31 and p32 each are 0 or 1; n3 is 0, 1, 2, 3 or 4, but the compound of formula (II) does not include the compounds of formulae (Ia), (Ib) and (Ic).
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: September 21, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takanori Hioki, Tetsuo Nakamura
  • Patent number: 6794121
    Abstract: This invention relates to a method of spectrally sensitizing a silver halide emulsion comprising the following steps in the following order a) providing a silver halide emulsion comprising tabular silver halide grains having an inner dye layer adjacent to the silver halide grain, said dye layer comprising at least one dye (Dye 1) that is capable of spectrally sensitizing silver halide, b) adding to the emulsion at least one dye (Dye 2) capable of providing a second dye layer adjacent to the inner dye layer, and c) adding to the emulsion a non-cationic surfactant or a scavenger for oxidized developer, or a combination of the two, to form a silver halide emulsion comprising silver halide grains having associated therewith two dye layers, wherein the dye layers are held together by non-covalent forces or by in situ bond formation; the outer dye layer adsorbs light at equal or higher energy than the inner dye layer; and the energy emission wavelength of the outer dye layer overlaps with the energy absorption
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: September 21, 2004
    Assignee: Eastman Kodak Company
    Inventors: David R. Foster, Stephen P. Singer, William J. Harrison, Alan R. Pitt
  • Patent number: 6790602
    Abstract: This invention relates to a method of spectrally sensitizing a silver halide emulsion comprising the following steps in the following order a) providing a silver halide emulsion comprising tabular silver halide grains having an inner dye layer adjacent to the silver halide grain, said dye layer comprising at least one dye (Dye 1) that is capable of spectrally sensitizing silver halide, b) adding to the emulsion at least one dye (Dye 2) capable of providing a second dye layer adjacent to the inner dye layer, and c) adding to the emulsion a non-cationic surfactant or a scavenger for oxidized developer, or a combination of the two, to form a silver halide emulsion comprising silver halide grains having associated therewith two dye layers, wherein the dye layers are held together by non-covalent forces or by in situ bond formation; the outer dye layer adsorbs light at equal or higher energy than the inner dye layer; and the energy emission wavelength of the outer dye layer overlaps with the energy absorption
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: September 14, 2004
    Assignee: Eastman Kodak Company
    Inventors: David R. Foster, Stephen P. Singer, William J. Harrison, Alan R. Pitt
  • Patent number: 6787297
    Abstract: This invention provides a silver halide photographic element comprising at least one silver halide emulsion comprising silver halide grains which have associated therewith at least an inner dye layer and an outer dye layer wherein the outer dye layer comprises a dye having at least one substituent that has a positive charge, said photographic element further comprising a cyanine dye of formula (I) or (II) (as described in the specification) that is capable of spectrally sensitizing a silver halide emulsion.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: September 7, 2004
    Assignee: Eastman Kodak Company
    Inventors: Steven G. Link, Richard L. Parton, Robert D. Wilson, Roger A. Bryant, William J. Harrison
  • Patent number: 6780577
    Abstract: A silver halide photographic material containing silver halide grains onto which a sensitizing dye in the first layer and a sensitizing dye or dyes in the second or after layers are multilayer-adsorbed, wherein the fluorescence life time of the dye or dyes in the second or after layers on the silver halide grain surface measured at a maximum wavelength of fluorescence spectrum is shorter than the fluorescence life time of the dye or dyes in a gelatin dry film measured at a maximum wavelength of fluorescence spectrum when the sensitizing dyes are multilayer-adsorbed onto the silver halide grain surface.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: August 24, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hideo Furuuchi
  • Publication number: 20040146817
    Abstract: This invention relates to a method of spectrally sensitizing a silver halide emulsion comprising the following steps in the following order
    Type: Application
    Filed: January 17, 2003
    Publication date: July 29, 2004
    Inventors: David R. Foster, Stephen P. Singer, William J. Harrison, Alan R. Pitt
  • Publication number: 20040146818
    Abstract: This invention relates to a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith:
    Type: Application
    Filed: January 17, 2003
    Publication date: July 29, 2004
    Inventors: Richard L. Parton, Thomas L. Penner, David R. Foster, Stephen A. Hershey
  • Publication number: 20040146815
    Abstract: This invention relates to a silver halide photographic element comprising a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of the dye image forming units contains layers of differing sensitivities, and the layer of highest sensitivity contains a development promoting agent or a specific coupler as described herein, or a combination thereof, and a silver halide emulsion comprising tabular silver halide grains having associated therewith at least two dye layers comprising (a) an inner dye layer adjacent to the silver ha
    Type: Application
    Filed: January 17, 2003
    Publication date: July 29, 2004
    Inventors: Sharon G. Johnston, Stephen P. Singer, Drake M. Michno, James A. Friday, David R. Foster
  • Publication number: 20040142290
    Abstract: This invention relates to a method of spectrally sensitizing a silver halide emulsion comprising the following steps in the following order
    Type: Application
    Filed: January 17, 2003
    Publication date: July 22, 2004
    Inventors: David R. Foster, Stephen P. Singer, William J. Harrison, Alan R. Pitt
  • Patent number: 6762015
    Abstract: A silver halide photographic emulsion which contains at least two sensitizing dyes represented by the following formula (I): Dye-((A)rQ)q(M)m  (I) wherein Dye represents a dye moiety; A represents a linking group; Q represents a dissociable group; r represents 0 or 1; q represents an integer of 2 or more; provided that at least one Q represents —SO3H and at least one Q represents a dissociable group other than —SO3H; M represents a counter ion; and m represents a number of 0 or more necessary to neutralize the electric charge in the molecule, and when 2 represents 2 or more, M's need not be the same.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: July 13, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetsuo Nakamura, Takanori Hioki
  • Publication number: 20040126721
    Abstract: Disclosed is a silver halide photographic light-sensitive material wherein a silver halide emulsion layer and/or a hydrophilic colloid layer contains at least one hydrazine derivative, and a silver halide emulsion is spectrally sensitized with a particular dye, and which contains a benzotriazol compound. There is provided a silver halide photographic light-sensitive material that exhibits superior residual color property and can provide stable photographic performance even after a long term running with a reduced silver amount.
    Type: Application
    Filed: September 29, 2003
    Publication date: July 1, 2004
    Inventors: Mitsunori Hirano, Kunio Ishigaki, Tokuju Oikawa
  • Patent number: 6756191
    Abstract: A silver halide photographic light-sensitive emulsion comprising a silver halide and a compound represented by the following Formula (I): wherein each X3 and X4 represents independently N, P, S, Se or Te; each Y1 and Y2 represents independently a group of carbon atoms necessary to complete a 6 to 12 membered heterocyclic ring with X3 and X4.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: June 29, 2004
    Assignee: Konica Corporation
    Inventors: Tatsuo Tanaka, Nobuaki Kagawa, Yoshiko Iwai, Tomohiro Oshiyama
  • Patent number: 6706468
    Abstract: A silver halide photographic emulsion is disclosed, comprising silver chloroiodide grains or silver chloroiodobromide grains, having 90 mol % or more of a silver chloride content, wherein the silver chloroiodide grains or silver chloroiodobromide grains have a layer having a silver iodide content of decreasing in the depth direction from the grain surface.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: March 16, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Satoshi Aiba, Osamu Yonekura
  • Patent number: 6692905
    Abstract: A silver halide photographic emulsion comprising a methine dye compound having in a molecule thereof at least one atomic group in which at least two groups selected from the group consisting of groups represented by formulas (I) and (II) are adjacent to each other or adjacent to each other through an atom: X—H  (I) wherein X represents an atom electrically more negative than a carbon atom, Y  (II) wherein Y represents an atom electrically more negative than a carbon atom, and has one or more lone electron pairs; and a silver halide photographic material comprising the silver halide photographic emulsion.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: February 17, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsumi Kobayashi, Takanori Hioki
  • Patent number: 6689554
    Abstract: A silver halide emulsion comprises an electron-releasing compound of Types 1 to 4: (Type 1) a compound capable of undergoing a one-electron oxidation (1-EO) to form a one-electron oxidation product (1-EOP), the 1-EOP capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction, (Type 2) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and having, in its molecule, two or more adsorptive groups acting on silver halides, (Type 3) a compound capable of undergoing 1-EO to thereby form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent bond forming process, and (Type 4) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: February 10, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kohzaburoh Yamada, Masahiko Taniguchi, Naoki Asanuma, Takashi Hoshimiya, Hirokazu Kyota, Masafumi Mizuno
  • Patent number: 6689552
    Abstract: A color photographic silver halide material which can be developed to form a negative, at least 95 mol % of the silver halides of which consist of AgCl, and which contains at least one light-sensitive silver halide emulsion layer, the silver halide of which contains at least one compound of formulae (I), (II) and (III): [IrClnF6-n]2−M2+  (I) wherein n denotes 0 or an integer from 1 to 6 and M2+ denotes 1 or 2 cations with a total number of 2 positive charges, [Fe(CN)6]m−Mm+  (II) wherein m denotes 2 or 3 and Mm+ denotes 1 to 3 cations with a total number of m positive charges, wherein o denotes 0, 1 or 2 and R denotes an alkyl, aryl or aralkyl, is distinguished under scanning exposure and on analogue exposure by sharp contrast which is independent of exposure time and by a stable latent image.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 10, 2004
    Assignee: Agfa-Gevaert
    Inventors: Cuong Ly, Edgar Draber, Matthias Feigl, Günter Helling, Thomas Kaluschke, Michael Missfeldt, Maria Nietgen, Heinz-Horst Teitscheid, Ralf Weimann, Heinz Wiesen
  • Patent number: 6686142
    Abstract: A chemically and spectrally-sensitized emulsion has been described, wherein said emulsion comprising (100) cubic silver halide grains with an average edge length of from 0.2 up to 1.5 &mgr;m, has been spectrally sensitized by addition at least three trimethine dyes: a main spectral sensitizer added in an amount of at least 85 mole % of all spectral sensitizers added, followed by adding a second spectral sensitizer in an amount of not more than 10 mole % and a third spectral sensitizer in an amount of at most 1 mole % wherein at least said main spectral sensitizer has two benzoxazole rings in its chemical structure, at least said third spectral sensitizer has two benzimidazole rings in its chemical structure and wherein the said second spectral sensitizer has a structure more sterically hindered than the structure of the other spectral sensitizers. A light-sensitive silver halide photographic film material coated with such emulsion and a radiographic screen/film combination has been described.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: February 3, 2004
    Assignee: Agfa-Gevaert
    Inventors: Kathy Elst, Paul Callant
  • Patent number: 6649336
    Abstract: A silver halide photographic light-sensitive material is disclosed, including at least one silver halide emulsion layer, wherein the silver halide grain contained in the emulsion layer is silver chloroiodide or silver chloroiodobromide having a silver chloride content of 90 mol % or more and a silver iodide content of 0.01 to 1.0 mol %, at least one hexacyano complex is doped in an amount of at least 1×10−7 mol % based on the total silver amount, and the emulsion layer contains a methine dye represented by the formula (I) as defined.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: November 18, 2003
    Assignee: Fuji Photo Film Co., LTD
    Inventors: Katsuhisa Ohzeki, Tetsuo Nakamura
  • Patent number: 6649335
    Abstract: A cyanine dye of formula (II) wherein X1 is C(R5, R6), NR7, O, S or Se, X2 is O, S, Se or NR13, R2 with R3, or R3 with R4, are the remaining members for the completion of a condensed furano ring system, and the other R2 or R4 radical, is H, a halogen, SH, CN, CF3, alkyl, aryl, heterocyclyl, alkoxy, aryloxy, alkylthio or arylthio, R10 to R12, are H, a halogen, SH, CN, CF3, alkyl, aryl, heterocyclyl, alkoxy, aryloxy, alkylthio or arylthio, or R10 with R11, or R11 with R12, are the remaining members for the completion of a ring system, R5 to R7 and R13 are alkyl, alkylene-SO3Z1 or alkylene-CO2Z1, R8 and R9 are alkyl, alkylene-SO3Z1, alkylene-CO2Z1 or alkylene-Y2—N(Z1)—Y3-alkyl, Z1 is H or a negative charge, Y2 and Y3 are —S(═O)2— or —C(═O)—, M1 is a counterion, L1, L2 and L3 are a methine group and n is 0, 1, 2 or 3.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: November 18, 2003
    Assignee: AGFA-Gevaert
    Inventor: Michael Missfeldt
  • Patent number: 6632597
    Abstract: A compound represented by the following formula (1) and a silver halide photographic material containing the compound: wherein Dye 1 represents a first chromophore; Dye 2 represents a second chromophore; L1 represents a linking chain; R1 represents a dissociable group having pKa of 5 or less; m1 represents an integer of from 1 to 5; m2 represents an integer of from 1 to 5; and m3 represents an integer of from 1 to 4.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: October 14, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiroo Takizawa
  • Publication number: 20030175629
    Abstract: A process for preparing a concentrated photographic spectral sensitizing dye-water composition which comprises adding an anionic sensitizing dye to an aqueous medium in the substantial absence of organic solvent, and agitating the combined dye and aqueous medium, wherein the anionic dye forms a liquid-crystalline dye phase in the aqueous medium and the agitation is performed in the presence of a nonionic surfactant having an HLB of less than 12 and an aqueous solubility at 25° C. of greater than 10 ppm, which nonionic surfactant is in the aqueous medium at a level of from 10 to 1000 ppm. In a specific embodiment of the invention, where the viscosity (at 0.1 s−1 shear rate) of the dye-water composition in the absence of the nonionic surfactant would be greater than 100 cp and especially where such viscosity would be greater than 500 cp, the surfactant is preferably present at a level sufficient to substantially reduce air entrainment during agitation of the dye-water composition.
    Type: Application
    Filed: January 28, 2002
    Publication date: September 18, 2003
    Applicant: Eastman Kodak Company
    Inventors: James E. Novak, Jeffrey S. Baugher, Dirk J. Hasberg, Lloyd A. Lobo
  • Patent number: 6620581
    Abstract: This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith at least two dyes: (a) a first dye that has at least one anionic substituent and that is capable of spectrally sensitizing a silver halide emulsion; and (b) a second dye that absorbs light at an equal or shorter wavelength than the first dye and that has at least one cationic substituent and that is highly fluorescent.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: September 16, 2003
    Assignee: Eastman Kodak Company
    Inventors: Richard L. Parton, Joseph C. Deaton, William J. Harrison, Margaret J. Helber
  • Patent number: 6610468
    Abstract: A silver halide photographic material having high sensitivity, low fog and good shelf life (i.e., storage stability), which comprises at least one kind of merocyanine dye represented by formula (I): wherein Z1 represents an atomic group necessary for forming a naphthoxazole ring, R1 and R2 each represents an unsubstituted or substituted alkyl group, an aryl group or a heterocyclic group, L1, L2, L3 and L4 each represents a methine group, M1 represents a charge neutralizing counter ion, and m1 is a number of 0 or more necessary for neutralizing a charge in a molecule.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: August 26, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Katoh, Tomoyuki Ohzeki, Katsutoshi Yamane, Takanori Hioki
  • Patent number: 6593074
    Abstract: A silver halide photographic emulsion is disclosed, which comprises at least one dye or sensitizing dye having at least one organic counter ion; and also a silver halide photographic emulsion layer containing the above dye or sensitizing dye and a method of producing the above silver halide photographic emulsion are disclosed.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: July 15, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takanori Hioki, Noboru Hikichi
  • Patent number: 6566044
    Abstract: The present invention provides a silver halide photographic material that is excellent in photographic speed as well as image graininess and exhibits low residual color even after rapid processing. The silver halide photographic material contains a compound represented by formula (I) and a compound represented by formula (II), as defined.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: May 20, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsuhisa Ohzeki, Tetsuo Nakamura, Takanori Hioki
  • Patent number: 6562557
    Abstract: A color photographic material comprising a transparent support, at least one blue-sensitive, predominantly yellow-coupling silver halide emulsion layer, at least one green-sensitive, predominantly magenta-coupling silver halide emulsion layer (PP-1) and at least one red-sensitive, predominantly cyan-coupling silver halide emulsion layer (BG-1), characterised in that the spectral sensitivity distribution of BG-1 is characterised in that 605≦&lgr;max≦630 nm, 0.1≦&Dgr;lgE640≦0.6 and 1.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: May 13, 2003
    Assignee: Agfa-Gevaert
    Inventors: Klaus Wagner, Heinz Schütz, Peter Bell, Lothar Endres, Detlev Kapitza, Thomas Stetzer
  • Patent number: 6485897
    Abstract: This invention relates to a photographic element comprising a support having thereon light sensitive silver halide layers comprising at least one red light sensitive silver halide layer, at least one green light sensitive silver halide layer, and at least one blue sensitive silver halide layer, wherein the green light sensitive silver halide layer has an absorption spectra having a maximum absorption at a wavelength &lgr;max from 530 to 560 nm and a half bandwidth less than 50 nm; and the red light sensitive silver halide layer has an adsorption spectra having a maximum absorption at a wavelength &lgr;max from 610 to 640 nm, and exhibiting from 30 nm hypsochromic of the wavelength of maximum absorption and below an area less than 40% based on the total area of the red light sensitive silver halide layer adsorption spectra. It further relates to a method of processing said element using an electronic filmwriter device.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: November 26, 2002
    Assignee: Eastman Kodak Company
    Inventors: Kristen D. Lockhart, Cheryl S. Johnston, Mark E. Johnson, David L. Fridd
  • Patent number: 6479226
    Abstract: A silver halide color photographic light sensitive material is disclosed, comprising a support having on one side of the support at least two red-sensitive layers, at least two green-sensitive layers, at least two blue-sensitive layer and a light-insensitive layer, wherein at least one of the green-sensitive layers contains a green-sensitive silver halide emulsion exhibiting a sensitivity maximum at a wavelength of 525 to 540 nm and a sensitivity maximum at a wavelength of 550 to 565 nm.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: November 12, 2002
    Assignee: Konica Corporation
    Inventor: Katsuhiko Heki
  • Patent number: 6479220
    Abstract: A method of imaging comprising: providing a photothermographic material having at least one photothermographic medium and exposing said material to a source of narrow band radiation, wherein said material comprises one or more non-sensitizing acutance or antihalation dyes associated with said photothermographic medium providing an absorption maximum (&lgr;max) within 10 nm of the wavelength of maximum output of said narrow band source and an optical density of at least 0.05 at a wavelength (&lgr;max+50) nm.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: November 12, 2002
    Assignee: Eastman Kodak Company
    Inventors: Michael L. Parkinson, Duncan McL A. Grieve
  • Publication number: 20020155400
    Abstract: A compound represented by the following formula (1) and a silver halide photographic material containing the compound: 1
    Type: Application
    Filed: August 31, 2001
    Publication date: October 24, 2002
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventor: Hiroo Takizawa
  • Patent number: 6465163
    Abstract: A heat developable light-sensitive material comprises a support, a light-sensitive layer and a non-light-sensitive layer. The light-sensitive layer contains silver halide and a reducing agent. The non-light-sensitive layer contains a cyanine dye represented by the formula (I) or a salt thereof and a base precursor: in which R1 is hydrogen, an aliphatic group, an aromatic group, —NR21R24, —OR21 or —SR21, each of R21 and R24 independently is hydrogen, an aliphatic group or an aromatic group, or R21 and R24 are combined to form a nitrogen-containing heterocyclic ring; R2 is hydrogen, an aliphatic group or an aromatic group; R3 is an aliphatic group; L1 is a methine chain consisting of an odd number of methines; and each of Z1 and Z2 independently is an atomic group forming a five-membered or six-membered nitrogen-containing heterocyclic ring.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: October 15, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masami Sakurada, Masaki Noro, Itsuo Fujiwara, Yoshiharu Yabuki
  • Publication number: 20020086250
    Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a support having thereon at least on light-sensitive halide emulsion layer, wherein the emulsion layer contains a compound represented by formula (1).
    Type: Application
    Filed: April 26, 2001
    Publication date: July 4, 2002
    Inventors: Takashi Katoh, Hiroo Takizawa
  • Publication number: 20020081542
    Abstract: Disclosed is a photothermographic material containing a non-photosensitive silver salt and a photosensitive silver halide on a support, wherein the photosensitive silver halide is spectrally sensitized with a spectral sensitizing dye so that maximum spectral sensitivity wavelength could become longer than 730 nm and the conditions defined by the following formulas (1) and (2) and/or the conditions defined by the following formulas (3) and (4) could be satisfied:
    Type: Application
    Filed: April 6, 2001
    Publication date: June 27, 2002
    Inventor: Takahiro Goto
  • Patent number: 6403276
    Abstract: A film material has been provided with emulsions comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range shorter than 420 nm by the presence of at least one blue spectral sensitizer and of at least one azacyanine dye, the formula of which has been given in the description and in the claims. A radiographic screen/film combination or system has also been provided comprising a duplitized film sandwiched between a pair of supporting or self-supporting X-ray intensifying screens, characterized in that i) said pair of supported or self-supporting X-ray intensifying screens essentially consists of luminescent phosphor particles emitting at least 50% and more preferably at least 80% of their emitted radiation in the wavelength range shorter than 420 nm, ii) said film corresponds with the film material disclosed hereinbefore.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: June 11, 2002
    Assignee: Agfa-Gevaert
    Inventors: Kathy Elst, Paul Callant, Ann Verbeeck
  • Patent number: 6348307
    Abstract: An object of the present invention is to provide a silver halide photographic light-sensitive material which exhibits a high sensitivity and less residual color.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: February 19, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takanori Hioki