Patents Examined by Lee C. Wright
  • Color photographic silver halide duplicating element and process
    Patent number: 5399468
    Abstract: A color photographic silver halide negative working duplicating element and process comprising (A) a magenta colored masking coupler in at least one blue-sensitive photographic silver halide emulsion layer; and (B) a combination of (i) masking couplers and (ii) color contamination of at least one photographic silver halide emulsion layer enables upon exposure and processing of the element formation of a duplicate image that enables formation of a print image that is visually indistinguishable from the original image. The color photographic silver halide duplicating element is useful in forming duplicate images, especially for color motion picture films.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: March 21, 1995
    Assignee: Eastman Kodak Company
    Inventors: John F. Sawyer, David E. Fenton
  • Silver halide color photographic light-sensitive material
    Patent number: 5395749
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one layer which contains at least one compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each independently represents an alkyl group, an aryl group or a heterocyclic group; Ar represents an aryl group; Ar and R.sup.1 may be linked to form a 5- to 7-membered ring but R.sup.2 and Ar or R.sup.1 do not link with each other; and n represents an integer of 0 to 2.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: March 7, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masayuki Negoro, Hiroo Takizawa, Masakazu Morigaki
  • Photothermographic imaging materials and sensitisers therefor
    Patent number: 5393654
    Abstract: A heptamethine cyanine dye in which both nitrogen atoms of the cyanine chromophore bear a carboxyalkyl substituent comprising an alkyl chain of at least five carbon atoms. The dyes are useful as sensitisers in photothermographic imaging materials.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: February 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ronald W. Burrows, David B. Oliff, James B. Philip, Jr.
  • Silver halide color photographic material
    Patent number: 5384236
    Abstract: A silver halide color photographic material comprising a support having provided thereon at least one layer containing at least one cyan coupler represented by formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each represent a substituent except methyl group;R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represent a hydrogen atom or a substituent;Z represents a non-metallic atom or a non-metallic atomic group necessary for forming a ring and the non-metallic atomic group of Z may optionally be substituted by substituent(s); andX represents a hydrogen atom, or a group of splitting off from the formula by coupling reaction with an oxidation product of an aromatic primary amine color developing agent.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: January 24, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koushin Matsuoka, Yasuhiro Shimada, Hiroyuki Yoneyama
  • Hydroxyquinoline cyan couplers and their process of production
    Patent number: 5382502
    Abstract: 8-hydroxyquinoline and 5-hydroxyquinoline compounds of the following formulae: ##STR1## , wherein: R.sub.1 is a substituted or unsubstituted alkyl group with 8 to 30 carbon atoms;R.sub.2 is hydrogen or another substituent;X is a group capable of being released by a coupling reaction with an oxidized aromatic primary amine developing agent; andZ is a nonnucleophilic substituent or a group not capable of being eliminated during or following a coupling reaction with an oxidized color developerhave been found to be useful in photographic materials as cyan dye-forming couplers. A process in which a substituted aminophenol salt reacts with two molar equivalents of an enolizable aldehyde containing at least two a-substituted hydrogen atoms is used to make these couplers and other hydroxyquinoline compounds.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: January 17, 1995
    Assignee: Eastman Kodak Company
    Inventors: Philip T. S. Lau, Danny R. Thompson, Stanley W. Cowan
  • Method of preparing coupler dispersions
    Patent number: 5380628
    Abstract: Fine particle photographic coupler dispersions are prepared by forming a dispersion of a photographic coupler, coupler solvent and auxiliary coupler solvent in an aqueous gelatin medium containing at least about 1% by weight of an anionic surfactant selected from the group consisting of alkali metal salts of alkarylene sulfonic acids, alkali metal salts of alkyl sulfates, alkaryl sulfonate salts, and alkyl sulfosuccinates; and washing the dispersion with water for a time sufficient to remove at least one-fourth of the surfactant.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: January 10, 1995
    Assignee: Eastman Kodak Company
    Inventors: John F. Sawyer, Paul L. Zengerle
  • Cyan dye-forming coupler and a silver halide color photographic material containing the same
    Patent number: 5380638
    Abstract: There is disclosed a cyan dye-forming coupler represented by the following formula (I) and a silver halide color photographic material containing the same: formula (I) ##STR1## wherein R represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or an aryl group having 6 to 20 carbon atoms, Y represents a group capable of substitution onto a benzene ring, Z represents a group capable of substitution onto a naphthalene ring, X represents a hydrogen atom or a coupling-off group, m is an integer of 0 to 4, and n is an integer of 0 to 4.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: January 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroo Takizawa, Hideotoshi Kobayashi, Hideki Naito
  • Silver halide photo-sensitive material
    Patent number: 5378595
    Abstract: A silver halide photo-sensitive material comprising a support, and at least one silver halide emulsion layer, on said support containing at least one compound having the following general formula (I): ##STR1## where R.sup.1 is an aliphatic group, an aryl group, an aliphatic oxy group or an aryloxy group; and X is an alkylene or alkenylene group forming a five- or six-membered ring. In this event, R.sup.1 will not bond to a carbon atom in the ring of X.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: January 3, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroo Takizawa, Toshiyuki Makuta
  • Silver halide color photographic material
    Patent number: 5378594
    Abstract: There is disclosed a silver halide color photographic material comprising at least one sparingly water-soluble epoxy compound represented by formula (I), (II), or (III) and a silver halide emulsion layer which comprises high-silver-chloride grains containing metal ions and/or having silver bromide localized phases on the surface thereof, and/or that have been sensitized by a gold compound: ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 each represent a substituted or unsubstituted alkyl group or a halogen atom; L.sup.1 and L.sup.2 each represent a divalent aliphatic group, which may be substituted or unsubstituted; M.sup.1 represents an oxygen atom or a nitrogen atom; A represents a polyvalent linking group; a, b, and c each are an integer of 0 to 4; x and y each are an actual number of 0 to 20; l is 1 or 2; and m represents an integer of 2 to 4.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: January 3, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kentaro Okazaki, Naoto Oshima, Kiyoto Takada
  • Photographic material and process comprising a bicyclic pyrazolo coupler
    Patent number: 5378587
    Abstract: A photographic element contains a photographic silver halide layer having associated therewith a bicyclic pyrazolo coupler having a ballast group represented by Formula (I):--C(R').sub.m --L--Y--Ar(R").sub.nwherein:L is a divalent linking group connecting the methylene group to the remainder of the ballast group and containing at least one group selected from the group consisting of --NR.sup.1 CO--, --CONR.sup.1 --, --NR.sup.1 SO.sub.2 -- and --SO.sub.2 NR.sup.1 --, wherein R.sup.1 is hydrogen or a substituent;Y is a divalent linking group connecting L to Ar and containing a member selected from the group consisting of --O--, --S--, and --NR.sup.1 -- wherein R.sup.1 is hydrogen or a substituent;Ar is an aryl group;each R' and R" is independently a substituent, provided that at least one R" is a substituted or unsubstituted alkyl or alkoxy group having at least 10 carbon atoms; andm and n are at least 1.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: January 3, 1995
    Assignee: Eastman Kodak Company
    Inventors: Sundaram Krishnamurthy, Stanley W. Cowan
  • Color photographic materials and methods containing DIR or DIAR couplers and carbonamide coupler solvents
    Patent number: 5378593
    Abstract: Color photographic materials comprise a substrate bearing a silver halide emulsion and a coupler composition comprising (a) a 2-phenylcarbamoyl-1-naphthol compound selected from the group consisting of development inhibitor releasing couplers and timed development inhibiting releasing couplers, and (b) a carbonamide coupler solvent. The carbonamide coupler solvent is employed to reduce dye density changes and/or dye hue changes resulting from cold storage of the photographic materials.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: January 3, 1995
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Melvin M. Kestner, Paul L. Zengerle
  • Silver halide color photographic material
    Patent number: 5378596
    Abstract: A silver halide color photographic material comprises a support having provided thereon at least one silver halide emulsion layer containing at least one pyrrolotriazole cyan coupler represented by the following Formula (I) or (II) and at least one phenol or 1-naphtol cyan coupler represented by the following Formulas (III), (IV), (V) and (VI): ##STR1## wherein Za and Zb each represents --C(R.sub.3).dbd. or --N.dbd.; R.sub.1 and R.sub.2 each independently represents an electron attractive group having a Hammett's substituent constant .sigma..sub.p of 0.2 or more and the sum of the .sigma..sub.p values of R.sub.1 and R.sub.2 is 0.65 or more; R.sub.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: January 3, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideaki Naruse, Makoto Suzuki
  • Silver halide photosensitive materials
    Patent number: 5376514
    Abstract: A silver halide photosensitive photographic material comprising a support and provided thereon, photographic component layers including at least one silver halide emulsion layer is disclosed, wherein the photosensitive silver halide grains contained in all the silver halide emulsion layers have an average silver iodide content ranging from 0 to 3 mol % and contain at least silver bromide; and at least one of the silver halide emulsion layers contain a diequivalent phenolic cyan dye-forming coupler having a ureido group in a 2-position of a phenolic nucleus.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: December 27, 1994
    Assignee: Konica Corporation
    Inventors: Satoru Shinba, Toshihiko Kimura, Fumio Ishii
  • Silver halide light sensitive color photographic material
    Patent number: 5376520
    Abstract: A silver halide color photographic light-sensitive material containing a polyvalent alcohol is disclosed. The polyvalent alcohol has two or more hydroxy group and is water immissible. The polyvalent alcohol is used in combination with a dye forming coupler.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: December 27, 1994
    Assignee: Konica Corporation
    Inventors: Hiroshi Kita, Hirokazu Sato
  • Silver halide color photographic light-sensitive materials
    Patent number: 5376513
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the light-sensitive material contains a yellow colored cyan coupler and an acylacetamide yellow dye forming coupler having an acyl moiety represented by the general formula (A): ##STR1## wherein R.sub.1 represents a univalent group, Q represents a group of non-metal atoms required to form, together with C, a three to five membered hydrocarbon ring or a three to five membered heterocyclic ring which has within the ring at least one hetero atom selected from among N, O, S and P, with the proviso that R.sub.1 is not a hydrogen atom and it does not join with Q to form a ring.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: December 27, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Keiji Mihayashi
  • Photographic color couplers and photographic materials containing them
    Patent number: 5374511
    Abstract: A 1-H-pyrazolo-[1,5-b]-1,2,4-triazole having a combination of an arylthio coupling-off group and a tertiary alkyl group attached via its tertiary carbon atom in the 6-position preferably has the general formula: ##STR1## wherein R.sup.1 is a tertiary alkyl group,R.sup.2 is an alkyl or substituted alkyl group, andX is a thioaryl or substituted thioaryl group.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: December 20, 1994
    Assignee: Eastman Kodak Company
    Inventors: Llewelyn J. Leyshon, David Clarke
  • Silver halide photographic material comprising an oil-in-water type dispersion
    Patent number: 5370983
    Abstract: A silver halide photographic material containing an oil-in-water type dispersion of a hydrophobic photographically useful substance is disclosed, in which the dispersion is prepared by emulsifying and dispersing a solution (A) of at least one water-insoluble and organic solvent-soluble polymer in a substantially water-immiscible organic solvent and a solution (B) of at least one hydrophobic photographically useful substance in a substantially water-immiscible organic solvent in an aqueous medium (C) either simultaneously or separately. The dispersion has improved stability with time, and the photographically useful substance in the dispersed particles exhibits improved stability to light or heat in the photographic material.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: December 6, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akiko Shono, Osamu Takahashi
  • Silver halide color photographic light sensitive material
    Patent number: 5368998
    Abstract: A silver halide color photographic light sensitive material comprising a magenta coupler of Formula is disclosed. ##STR1## In the formula R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each represent a hydrogen atom, an aliphatic group, aromatic group or heterocyclic group, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each are same or different, the aliphatic group and aromatic group each may have a substituent(s); R.sup.6 and R.sup.7 each represent a hydrogen atom or a substituent, wherein R.sup.6 and R.sup.7 each are same or different and may form a dioxane ring, and the dioxane ring may have a substituent (s); X is a hydrogen atom, or a group or atom which is released upon the reaction with the oxidation product of developing agent; Z.sub.1 is a non-metal group to form a 5-membered cycle in combination with a nitrogen atom; the cycle represented by X may have a sustituent(s).
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: November 29, 1994
    Assignee: Konica Corporation
    Inventors: Hiroshi Ishidai, Hiroshi Kita, Yutaka Kaneko, Koji Daifuku
  • Silver halide color photosensitive materials
    Patent number: 5366856
    Abstract: A silver halide color photosensitive materials wherein a coupler represented by the formula indicated below is included in at least one layer on a support. In the formula, for example, Za represents --NH--, Zb represents --C(R.sub.4).dbd. and Zc represents --N.dbd.. R.sub.1, R.sub.2 and R.sub.3 each represents an electron withdrawing group of which the Hammett substituent group constant .sigma..sub.p value is 0.20 or above. However, the sum of the .sigma..sub.p values of R.sub.1 and R.sub.2 is 0.65 or above. R.sub.4, R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e each represents a hydrogen atom or a substituent group. However, for example at least one of R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e represents an electron withdrawing group, and the sum of the Hammett substituent group constant .sigma..sub.p values of each of R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e is 0.5 or above.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: November 22, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhiro Shimada, Hiroyuki Yoneyama
  • Silver halide color photographic light-sensitive material
    Patent number: 5364753
    Abstract: There is provided a silver halide color photographic light-sensitive material improved in sensitivity, color reproduction and image lasting quality.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: November 15, 1994
    Assignee: Konica Corporation
    Inventors: Katsumasa Yamazaki, Shuichi Sugita, Shigeto Hirabayashi