Patents Examined by Lee C. Wright
  • Patent number: 5589318
    Abstract: A high-contrast photographic material, adapted for use in the field of graphic arts, includes a hydrazide nucleating agent and comprises a silver halide emulsion layer containing silver halide grains which are spectrally sensitized with a non-desorbing sensitizing dye and silver halide grains which are not spectrally sensitized. Preferably, the photographic material also contains a booster compound which enables it to be processed in a developer having a pH of below 11.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: December 31, 1996
    Assignee: Eastman Kodak Company
    Inventors: Allison Hazel C. Dale, Roger H. Piggin, Richard A. Hallett, Paul R. McIntyre
  • Patent number: 5585230
    Abstract: Dispersions comprising particles of a phenolic cyan photographic coupler of Formula I dispersed in an aqueous gelatin solution substantially free of permanent organic solvent demonstrate improved stability to dispersion crystallization. ##STR1## R.sub.1 and R.sub.2 in Formula I each represent an aliphatic group, an aromatic group, or a heterocyclic group. R.sub.3 represents a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, an acylamino group, or a non-metallic atomic group necessary to form a nitrogen-containing 5-membered or 6-membered ring together with R.sub.2. X represents a hydrogen atom or a group capable of being released upon a coupling reaction with oxidation product of a developing agent, and n represents 0 or 1.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: December 17, 1996
    Assignee: Eastman Kodak Company
    Inventors: Paul L. Zengerle, Allan F. Sowinski, Ronda E. Factor
  • Patent number: 5582962
    Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a support having on one side thereof hydrophilic colloid layers including a silver halide emulsion layer, wherein at least one of the hydrophilic colloid layers contains a dye represented by the following formula (1) ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sub.2 is a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an acylamino group, a ureido group, an amino group, an acyl group, an alkoxy group, an aryloxy group, a hydroxy group, a carboxy group, a cyano group, a sulfamoyl group or a sulfonamide group; B is a five- or six-membered oxygen-containing heterocyclic group, or a six-membered nitrogen-containing heterocyclic group; L.sub.1, L.sub.2 and L.sub.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: December 10, 1996
    Assignee: Konica Corporation
    Inventor: Masaaki Taguchi
  • Patent number: 5580710
    Abstract: A silver halide color photographic material excellent in color forming property and wet heat image fastness comprising at least one compound represented by formula (I) in any layer formed on a support: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent branched chain unsubstituted alkyl groups each having 3 to 20 carbon atoms with the proviso that the total carbon number of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is 16 to 60.
    Type: Grant
    Filed: September 22, 1995
    Date of Patent: December 3, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroo Takizawa, Yasuhiro Yoshioka, Masakazu Morigaki
  • Patent number: 5580711
    Abstract: Disclosed is silver halide photographic light-sensitive material comprising a support and thereon at least one light-sensitive silver halide emulsion layer, wherein at least one layer of said light-sensitive silver halide emulsion layer contains silver halide grains spectrally sensitized with a dye selected from the group consisting of Formula S-I and Formula S-II: ##STR1##
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: December 3, 1996
    Assignee: Konica Corporation
    Inventors: Nobuaki Kagawa, Noriyasu Kita
  • Patent number: 5578434
    Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 26, 1996
    Assignee: Imation Corp.
    Inventors: Elda Moizo, Carlo Marchesano, Andrew Mott, Dian E. Stevenson
  • Patent number: 5578408
    Abstract: A toner for developing an electrostatic image is constituted by a binder resin and a colorant. The toner is characterized by a percentage change .sub.G' of at most 50% as calculated by the following formula (1):.gamma..sub.G' =(1-G'.sub.50% /G'.sub.1%).times.100 (1),wherein .gamma..sub.G' denotes a percentage change of storage modulus, G'.sub.50% denotes a storage modulus at 50% strain at 150.degree. C., and G'.sub.1% denotes a storage modulus at 1% strain at 150.degree. C.; a percentage change .gamma..sub.G" of at most 50% as calculated by the following formula (2):.gamma..sub.G" =(1-G".sub.50% /G".sub.1%).times.100 (2),wherein .gamma..sub.G" denotes a percentage change of loss modulus, G".sub.50% denotes a loss modulus at 50% strain, and G".sub.1% denotes a loss modulus at 1% strain; and a storage modulus G' of 3.times.10.sup.3 -7.times.10.sup.4 dyn/cm.sup.2 in a range of 1-50% strain at 150.degree. C.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: November 26, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Kohtaki, Masaaki Taya, Makoto Unno, Tadashi Doujo
  • Patent number: 5576150
    Abstract: The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having formula: ##STR1## wherein: R.sub.1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom;X is hydrogen or a coupling-off group;R.sub.2, R.sub.3, R.sub.4, and R.sub.6 are independently hydrogen or substituent groups;q is from 1 to 3;R.sub.5 and R.sub.7 are independently alkyl, alkoxy, aryl, or aryloxy groups;G is a substituent group and n is from 0 to 3; andY is a substituent group and m is 0 to 4.The invention also provides a coupler compound, a photographic element containing the emulsion layer of the invention, and an imaging process.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: November 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Ping W. Tang, Stanley W. Cowan, David J. Decker, Daniel E. Corcoran
  • Patent number: 5576165
    Abstract: A silver halide color photographic material having improved stability with respect to fog and latent images, which contains at least one compound of formula (A) and at least one polymer having repeating units of formula (I) or (II): ##STR1## wherein R.sub.a1 to R.sub.a5 are as defined in the specification ##STR2## wherein R.sup.1 represents a hydrogen atom or an alkyl group; and Q represents a group selected from the group consisting of groups represented by formulae 1) to 4): ##STR3## (wherein the definitions of each symbols are the same as in the application) ##STR4## wherein E represents --COR.sub.21, --COOR.sub.22, --CONHR.sub.23, --CONHCOR.sub.24 or --SO.sub.2 R.sub.25 (wherein R.sub.21, R.sub.22, R.sub.23, R.sub.24 and R.sub.25 each represents an alkyl, aryl or cycloalkyl group, or a hydrogen atom); and G represents an alkylene group.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: November 19, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Nozawa, Masakazu Morigaki
  • Patent number: 5576173
    Abstract: A silver halide photographic element comprising a silver halide emulsion layer sensitized with a sensitizing dye of formula (I) which provides a maximum sensitivity at greater than 700 nm and which emulsion layer has substantially no dye deaggregating compound therein: ##STR1## wherein: X.sub.1 and X.sub.2 are independently sulfur, selenium or oxygen provided that X.sub.1 and X.sub.2 are not both oxygen and either benzo ring may be substituted or unsubstituted;R.sub.1 and R.sub.2 each independently represent an alkyl, aryl or heterocyclic group provided that at least one of R.sub.1 or R.sub.2 has an acid or acid salt substituent;A is a counterion as needed to balance the charge.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: November 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Richard L. Parton, Anthony Adin
  • Patent number: 5576170
    Abstract: A photographic element comprising a support having situated thereon a silver halide emulsion, the emulsion comprising an alkynylamine compound of the formula: wherein Z represents atoms necessary to complete a 5 to 10-membered heterocyclic ring system, R.sup.1 represents hydrogen or an alkyl of from 1 to 5 carbon atoms, and R.sup.2 represents hydrogen, or an alkyl, aryl, heteroaryl, carbocyclic or heterocyclic group; andat least one dihydroxy aryl compound represented by formula II or III: ##STR1## wherein R.sup.3 to R.sup.12 are independently selected from the group consisting of hydrogen, hydroxy, sulfonate, or an alkyl of from 1 to 5 carbon atoms, and wherein at least two of such groups represent a hydroxy group.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: November 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Jon N. Eikenberry, Robert E. Bernard
  • Patent number: 5576166
    Abstract: A silver halide light-sensitive color photographic material is disclosed. A green-sensitive silver halide emulsion layer of the material comprises a coupler the formula M-I or formula M-II defined in the specification, and the color photographic material provides enhanced sensitivity and excellent color reproduction property when it is printed, and improved resistance against formalin gas and storage preservation property before exposure.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 19, 1996
    Assignee: Konica Corporation
    Inventors: Shuichi Sugita, Shinri Tanaka, Takatugu Suzuki, Manabu Kaneko
  • Patent number: 5576167
    Abstract: A photographic element comprises a light-sensitive silver halide emulsion layer having associated therewith a coupler based on a 1-aryl-2-pyrazolin-5-one ring and represented by formula I: ##STR1## wherein: Ar.sup.1 and Ar.sup.2 are each independently aryl groups comprising a carboaromatic or heteroaromatic ring;X, Y, and Z are bonded to a carbon atom alpha to the 3-position and are independently selected from the group consisting of hydrogen and substituent groups such that the sum of the Taft .sigma.* values for X, Y, and Z is at least 1.5;R represents n independently selected substituent groups bonded to the Ar.sup.2 ring, provided that the sum of the appropriate Hammett .sigma. constants for all R substituent groups is at least 0.3, and provided further that two of X, Y, and Z may join to form a ring; andn is 0 to 5;provided that R may not be a nitro group ortho to the oxygen atom bonding Ar.sup.2 to the 1-aryl-2-pyrazolin-5-one ring.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: November 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Jerrold N. Poslusny, Lawrence G. Anderson, Jared B. Mooberry, Zheng Z. Wu
  • Patent number: 5573902
    Abstract: A chemically and spectrally sensitized tabular grain emulsion is disclosed including tabular grains (a) having major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (f) exhibiting an average thickness in the range of from less than 0.3 .mu.m to at least 0.07 .mu.m.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 12, 1996
    Assignee: Eastman Kodak Company
    Inventors: Richard L. Daubendiek, Joseph C. Deaton, Donald L. Black, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
  • Patent number: 5573894
    Abstract: An apparatus for exposing photosensitive materials includes a plurality of light sources for generating beams having different wavelengths, a polygon mirror for scanning and exposing the beams toward a color photosensitive material, and one or more f.theta. lenses disposed on an optical path between the photosensitive material and the polygon mirror. The polygon mirror and the f.theta. lenses are arranged, with respect to the beam from a light source having an intermediate wavelength among the light sources, such that reflection points corresponding to both ends of beam scanning on reflection surfaces of the polygon mirror pass through an identical point on an optical axis of the f.theta. lenses, and light beams at the both ends of beam scanning have line symmetry with respect to the optical axis of the f.theta. lenses.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: November 12, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenichi Kodama, Kensuke Goda
  • Patent number: 5571661
    Abstract: A silver halide light-sensitive color photographic materials is disclosed. The material comprises a compound which releases, upon reaction with an oxidation product of a color developing agent, a 2-mercapto-1,3,4-oxadiazole derivative represented by formula I: ##STR1## wherein L.sub.1 represents a linkage or a divalent linking group; R.sup.1 represents an alkyl group, an aryl group or a heterocyclic group; R.sup.2 represents a hydrogen atom or a substituent; n represents an integer of one, two or three; and m represents an integer of zero, one or two, provided that sum of m and n is three.The color photographic material produces a dye image having enhanced image-sharpness, showing large inter-image effect with reduced reduction of gamma in the layer, to which the coupler is incorporated and having improved stability with the lapse of time during storage.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 5, 1996
    Assignee: Konica Corporation
    Inventors: Osamu Ishige, Takesi Nakamura, Naoki Sato, Yutaka Kaneko
  • Patent number: 5571662
    Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one silver halide photographic emulsion layer, wherein the silver halide emulsion layer has been spectral-sensitized with a spectral-sensitizer to have a sensitized peak in a wavelength range longer than 730 nm; and light absorption due to the silver halide emulsion containing the spectral sensitizer satisfies the following equation (1):Abs (peak wavelength)/Abs (peak wavelength-100 nm)>5 (1);and a method for processing the above silver halide photographic material.The material has high sensitivity only to semiconductor laser rays and has low sensitivity to any other rays.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: November 5, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuji Mihara, Tadashi Ikeda, Yoshio Inagaki, Takashi Kato
  • Patent number: 5565314
    Abstract: In a silver halide emulsion, tabular silver halide grains substantially consisting of silver bromoiodide, each having faces as two parallel major faces, an aspect ratio of 2 or more, and an average silver iodide content of 1 mol % or more, account for 50% or more of a total projected area of silver halide grains.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: October 15, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaharu Nakatsu, Hiroshi Takehara
  • Patent number: 5565312
    Abstract: Dye fade in photographic images prepared from a silver halide photographic element having a light sensitive silver halide emulsion layer and a pyrazoloazole dye forming coupler is reduced by using a combination of stabilizer compounds as shown in the specification.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: October 15, 1996
    Assignee: Eastman Kodak Company
    Inventor: Rakesh Jain
  • Patent number: 5565313
    Abstract: Disclosed is a silver halide color photographic light-sensitive material comprising at least one of magenta coupler represented by Formula I or II: ##STR1## wherein R.sup.1 and R.sup.4 each represent a substituent; R.sup.2 and R.sup.3 each represent a substituted or unsubstituted alkyl group; L.sub.1 and L.sub.2 each represent a substituted or unsubstituted alkylene group, an arylene group, an aralkylene group or an arylenealkylene group; Y represents ##STR2## R.sup.5 and R.sup.6 each represent a substituent; X.sub.1 represents a hydrogen atom or a group capable of splitting off upon reacting with an oxidized product of a color developing agent; Z represents non-metal atomic group forming a 5-membered or 6-membered heterocyclic ring together with a nitrogen atom; m and n each represent an integer of 0 or 1; p represents an integer of 0 to 4; q represents an integer of 0 to 2, provided that when p is 2 or more, R.sup.4 may be the same or different; and each of them may form a ring.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: October 15, 1996
    Assignee: Konica Corporation
    Inventors: Hiroshi Ishidai, Hiroshi Kita, Yutaka Kaneko