Vinylidene Compound Patents (Class 430/622)
  • Patent number: 7425409
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer, wherein the photothermographic material includes at least one polymer selected from a polycycloolefin, a cycloolefin copolymer, or a copolymer of olefin and maleimide or maleamide. A photothermographic material which is excellent in film surface properties and photographic properties is provided.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: September 16, 2008
    Assignee: FUJIFILM Corporation
    Inventor: Yasuhiro Yoshioka
  • Patent number: 7105288
    Abstract: A photothermographic material is disclosed, comprising on a support a light-sensitive emulsion containing a light-insensitive organic silver salt and a light-sensitive silver halide, a reducing agent for silver ions and a binder, wherein the photothermographic material further comprises a compound represented by the following formula (A-1) or (B) and a compound represented by the following formula (A-2)
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: September 12, 2006
    Assignee: Konica Corporation
    Inventors: Kiyokazu Morita, Ayumu Nishijima
  • Patent number: 7074551
    Abstract: The present invention relates to an imaging element comprising at least one imaging layer and a support wherein the support comprises at least one layer comprising a splayant and a layered material, wherein the layered material has an aspect ratio from 20:1 and 500:1 and wherein the layered material comprises less than 10% by weight of the layer. The present invention also relates to a method of making a dimensionally stable imaging element comprising providing a support wherein said support comprises at least one layer comprising a splayant and a layered material, wherein said layered material comprises an aspect ratio of from 20:1 to 500:1 and wherein said layered material comprises less than 10% by weight of said at least one layer; and applying at least one imaging layer.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: July 11, 2006
    Assignee: Eastman Kodak Company
    Inventors: YuanQiao Rao, Robert J. Kress
  • Patent number: 6958209
    Abstract: A photothermographic material comprising a support and having thereon an image forming layer containing an organic silver salt, light-sensitive silver halide grains, binder and a reducing agent, wherein the reducing agent comprises: a reducing agent A containing at least a bisphenol derivative represented by following Formula (A-1); and a reducing agent B containing at least a bisphenol derivative not represented by the Formula (A-1), and the amount of reducing agent A is 5 to 45 weight % of the total weight of the reducing agent A and reducing agent B.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: October 25, 2005
    Assignee: Konica Corporation
    Inventors: Kiyokazu Morita, Narito Goto, Ayumu Nishijima
  • Patent number: 6936411
    Abstract: A silver halide industrial radiographic material comprising on at least one side of a support a hydrophilic gelatinous non-spectrally sensitized radiation-sensitive emulsion layer, having grains, coated in a total amount in the range from 6 to 20 g, expressed as an equivalent amount of silver nitrate per square meter, and at least one non-radiation sensitive protective gelatinous antistress overcoat layer thereupon, wherein a ratio of gelatin to silver, expressed as silver nitrate in the said layer arrangement is at least 0.70, wherein said gelatinous layers are hardened by a gelatin cross-linking agent in an amount in order to have a dissolving time of at least 40 minutes, said time being defined as the period of time from the moment when the silver halide photographic material, dipped into 50 ml of an aqueous solution of 1.5% by weight of sodium hydroxide at 50° C.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: August 30, 2005
    Assignee: AGFA-Gevaert
    Inventors: Marc Van de Zegel, Marleen De Vester
  • Patent number: 6787299
    Abstract: A silver salt photothermographic imaging material is disclosed, comprising a light-sensitive aliphatic acid silver salt, a light-sensitive emulsion containing light-sensitive halide grains, a reducing agent for silver ions, a binder and a cross-linking agent, wherein the cross-linking agent is an aromatic polyisocyanate compound and the photothermographic material further comprises a compound selected from compounds represented by the following formulas.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: September 7, 2004
    Assignee: Konica Corporation
    Inventors: Hirobumi Yamashita, Toshihisa Takeyama
  • Publication number: 20040146814
    Abstract: A silver halide industrial radiographic material comprising on at least one side of a support a hydrophilic gelatinous non-spectrally sensitized radiation-sensitive emulsion layer, having grains, coated in a total amount in the range from 6 to 20 g, expressed as an equivalent amount of silver nitrate per square meter, and at least one non-radiation sensitive protective gelatinous antistress overcoat layer thereupon, wherein a ratio of gelatin to silver, expressed as silver nitrate in the said layer arrangement is at least 0.70, wherein said gelatinous layers are hardened by a gelatin cross-linking agent in an amount in order to have a dissolving time of at least 40 minutes, said time being defined as the period of time from the moment when the silver halide photographic material, dipped into 50 ml of an aqueous solution of 1.5% by weight of sodium hydroxide at 50 °C.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Inventors: Marc Van de Zegel, Marleen De Vester
  • Patent number: 6706467
    Abstract: An aqueous coating fluid is described comprising gelatin at a concentration of at least 1 wt % and a colloidal particle dispersed material phase at a volume fraction of at least 0.01, wherein at least 20% of the gelatin comprises a gelatin prepared from hydrolysis of ossein using sodium or potassium hydroxide. The present invention enables increasing the concentrations of a coating fluid containing gelatin and dispersed sub-micron colloidal materials, reducing the size of the sub-micron colloidal materials in such a coating fluid, and/or including higher molecular weight gelatin in such a coating fluid without detrimentally increasing the viscosity of such fluids. The invention further enables reducing the viscosity of an aqueous coating fluid containing gelatin and dispersed insoluble colloidal material, without needing to reduce the concentration of gelatin or colloidal materials, increase the size of the sub-micron colloidal materials, and/or reduce the molecular weight of the gelatin.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: March 16, 2004
    Assignee: Eastman Kodak Company
    Inventors: Andrew M. Howe, Richard W. Connelly, James S. Honan, Lloyd A. Lobo
  • Publication number: 20040043341
    Abstract: A photothermographic material is disclosed, comprising on a support a light-sensitive emulsion containing a light-insensitive organic silver salt and a light-sensitive silver halide, a reducing agent for silver ions and a binder, wherein the photothermographic material further comprises a compound represented by the following formula (A-1) or (B) and a compound represented by the following formula (A-2).
    Type: Application
    Filed: August 13, 2003
    Publication date: March 4, 2004
    Applicant: Konica Corporation
    Inventors: Kiyokazu Morita, Ayumu Nishijima
  • Patent number: 6689548
    Abstract: A photothermographic imaging material comprising a support having thereon a photosensitive layer, wherein the photosensitive layer has a silver coverage of 0.8 to 2.5 g/m2 and comprises a compound represented by Formula (A) or Formula (B): wherein each R3, R4 and R5 is independently an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, provided that R5 includes a silyl containing group, wherein Z2 represents OR22, X2, or OH; n2 is an integer of 1 to 3; each R21 and R22 is independently an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, provided that R21 contains at least one primary amino group or at least two selected from the group consisting of primary and secondary amino groups; and X is a chlorine atom or a bromine atom.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: February 10, 2004
    Assignee: Konica Corporation
    Inventors: Hirobumi Yamashita, Toshihisa Takeyama
  • Patent number: 6689556
    Abstract: Disclosed is a method of producing a water-soluble chain-extended gelatin subjecting a source a source gelatin having a first isoelectric point, in aqueous solution, to a partial crosslinking reaction to form a reaction mixture comprising a partially crosslinked gelatin having a second isoelectric point, filtering the reaction mixture, adjusting a pH value of the filtered reaction mixture to a value equivalent to the second isoelectric point ±1.5, and concentrating, drying and pulverizing the pH-adjusted reaction mixture.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: February 10, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kawamoto, Hiroki Sasaki, Minoru Uchida
  • Publication number: 20040018458
    Abstract: The present invention provides a photothermographic material including a support having disposed on one surface of the support, at least one image forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, a development accelerator and a binder, and at least one protective layer on the identical surface, wherein 50% by mass or more of the binder contained in the image forming layer is a water soluble binder, and the reducing agent is contained in the form of a solid dispersion.
    Type: Application
    Filed: May 15, 2003
    Publication date: January 29, 2004
    Inventor: Hajime Nakagawa
  • Patent number: 6589326
    Abstract: An aqueous coating fluid is described comprising gelatin at a concentration of at least 1 wt % and gelatin hardener at a level from 1-200 effective &mgr;mole hardener per gram of coating fluid, wherein at least 20% of the gelatin comprises a gelatin prepared from hydrolysis of ossein using sodium or potassium hydroxide. Relative improvements are obtained in reducing the rate of chemical gelation of a coating fluid containing gelatin and a hardener, without the need for chemically modifying functional groups of the gelatin. The invention further enables an increase in coating fluid concentration, increase in the fluid viscosity, reduction in the ratio of added anionic polymer to gelatin, and/or increase in the pH of a coating fluid containing gelatin and a hardener, without detrimentally increasing the rate of chemical gelation of the coating fluid.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: July 8, 2003
    Assignee: Eastman Kodak Company
    Inventors: Andrew M. Howe, Lloyd A. Lobo, Gary L. Santee
  • Patent number: 6573037
    Abstract: An imaging element is described comprising one or more hydrophilic colloid layers which include gelatin as a film forming binder which has been chemically crosslinked with a gelatin hardener, wherein at least 20% of the gelatin of at least one of the one or more hydrophilic colloid layers comprises a gelatin prepared from hydrolysis of ossein using sodium or potassium hydroxide, and the gelatin is chemical crosslinked with a gelatin hardener at a level from 70 to 120 effective &mgr;mole hardener per gram of gelatin. Improvements are obtained in the wet mechanical strength of an imaging element comprising gelatin as a binder, without needing to increase the amount of chemical crosslinker with respect to the gelatin. The invention further enables the use of relatively low molecular weight gelatins without compromising the wet mechanical strength of imaging elements and without needing to increase the amount of crosslinker relative to the amount of gelatin.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: June 3, 2003
    Assignee: Eastman Kodak Company
    Inventors: Lloyd A. Lobo, Hwei-Ling Yau, James S. Honan, Paul T. Hahm
  • Patent number: 6534255
    Abstract: A light-sensitive silver halide photographic element comprising a support and at least one hydrophilic colloid layer comprising a binder and a vinylsulfonyl type hardener coated thereon, wherein at least one of said hydrophilic colloid layers is a silver halide emulsion layer containing tabular silver halide grains having an average diameter:thickness ratio of at least 3:1, characterized in that said tabular silver halide grains are chemically sensitized by at least one gold sensitizer and at least one thiosulfonate sensitizer in the presence of a palladium compound added during chemical sensitization. The silver halide photographic elements of the present invention can be advantageously developed in hardener free developer and used in high temperature rapid processing in automatic processors which include transporting rollers, have good photographic and physical characteristics and are free from surface defects.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: March 18, 2003
    Assignee: Eastman Kodak Company
    Inventors: Gerolamo Delfino, Roberta Ganduglia
  • Patent number: 6423487
    Abstract: The present invention provides a thermally processed image recording material having, on a support, an image-forming layer containing at least (a) a silver salt of an organic acid, (b) a reducing agent and (c) a photosensitive silver halide and at least one protective layer provided on the image-forming layer and comprising polymer latex as binders of the image-forming layer and the protective layer, wherein at least one of the image-forming layer and the protective layer contains a viscosity enhancer that increases viscosity of its aqueous solution when the solution is heated and temperature of the solution exceeds a certain transition temperature, and the viscosity enhancer is a polymer selected from the group consisting of polymers containing a (meth)acrylamide derivative represented by the following formula (1) or (2) in an amount of 50 weight % or more as constituent units: (wherein R1 represents H or CH3, R2 represents an alkylene group, R3 to R6 represent H or CH3, and X represents &m
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: July 23, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takashi Naoi
  • Patent number: 6403296
    Abstract: A color photographic silver halide material containing gelatine, comprising a support and at least one photosensitive silver halide emulsion layer and at least one non-photosensitive layer, which material contains at least one compound of the formula (I) or (II) and is hardened with a vinylsulfonyl compound in which R1, R2, R3, m and n have the meanings stated in the description and wherein two residues R2 or R3 may in each case mean a fused carbo- or heterocyclic ring or the compound of the formula I is attached to a polymer chain via one of the residues R1, R2 or R3, in which R11, R12, R13, R14, o and p have the meanings stated in the description wherein two residues R13 or R14 may in each case mean a fused carbo- or heterocyclic ring or the compound of the formula II is attached to a polymer chain via a residue R13 or R14, is distinguished by improved storage stability.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: June 11, 2002
    Assignee: Agfa-Gevaert
    Inventors: Jörg Hagemann, Markus Geiger, Heinrich Odenwälder
  • Publication number: 20020018954
    Abstract: A single-side coated light-sensitive silver halide photographic film material has been disclosed, having on one side of a subbed support, one or more light-sensitive silver halide emulsion layer(s) overcoated with an outermost protective layer; and, at the other side of said support, a backing layer, covered with a protective outermost layer, characterized in that at least said backing layer is provided with a layer wherein, besides a cross-linked or cross-linkable first binder an organic component free from cross-linking upon reaction with a hardener is present as a second binder having a low molecular weight.
    Type: Application
    Filed: April 10, 2001
    Publication date: February 14, 2002
    Inventors: Marc Van den Zegel, Francis Vanhoudt, Frank Ruttens, Guy Damen
  • Publication number: 20010031437
    Abstract: Disclosed is a method of producing a water-soluble chain-extended gelatin subjecting a source a source gelatin having a first isoelectric point, in aqueous solution, to a partial crosslinking reaction to form a reaction mixture comprising a partially crosslinked gelatin having a second isoelectric point, filtering the reaction mixture, adjusting a pH value of the filtered reaction mixture to a value equivalent to the second isoelectric point ±1.5, and concentrating, drying and pulverizing the pH-adjusted reaction mixture.
    Type: Application
    Filed: February 23, 2001
    Publication date: October 18, 2001
    Inventors: Hiroshi Kawamoto, Hiroki Sasaki, Minoru Uchida
  • Patent number: 6174660
    Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least a light-sensitive silver halide emulsion layer containing a light-sensitive silver halide emulsion and at least a nonlight-sensitive layer, wherein said silver halide photographic light-sensitive material contains a compound represented by the following formula (1) and said silver halide photographic light-sensitive material further contains a vinylsulfone group containing hardener. HOCH2(CHOH)mCH2OH  Formula (1) wherein m represents an integer of 0 to 6.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: January 16, 2001
    Assignee: Konica Corporation
    Inventors: Takesi Nakamura, Katsumasa Yamazaki
  • Patent number: 6143487
    Abstract: Vinyl sulfone and/or .beta.-halo sulfone compounds have been found to improve fog stability on shelf aging of photothermographic imaging elements. These elements comprise a photosensitive silver halide, silver salt oxidizing agent and reducing agent for silver ion in a binder.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: November 7, 2000
    Assignee: Eastman Kodak Company
    Inventors: James B. Philip, Ivan H. Skoog, Gary L. Featherstone, Thomas J. Kub
  • Patent number: 5965338
    Abstract: This invention contemplates a multilayer, multicolor photographic element comprising a support, a plurality of dye-forming hydrophilic colloid containing silver halide emulsion layers which are spectrally sensitized to different regions of the visible spectrum including at least one blue-sensitive emulsion layer, a green-sensitive emulsion layer, and a red-sensitive emulsion layer wherein the topmost silver halide emulsion layer has a water swell percentage which is greater than any other light-sensitive emulsion layer.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: October 12, 1999
    Assignee: Eastman Kodak Company
    Inventors: Gary W. Visconte, Alfred B. Fant, Yongcai Wang
  • Patent number: 5958660
    Abstract: This invention comprises a composition containing a hydrophilic colloid and a water soluble polymer of boric acid, and optionally a hardening agent for the hydrophilic colloid. The hydrophilic colloid is preferably gelatin. This invention also comprises a photographic element in which at least one layer thereof contains a hydrophilic colloid and a water-soluble polymer of boric acid and a method of making the photographic element.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jeffrey F. Taylor, Tien-teh Chen, Hwei-Ling Yau, Elmer C. Flood, Lan B. Thai
  • Patent number: 5932404
    Abstract: The present invention is a silver halide photographic material including at least one layer which contains; a polymer comprising as constituent components thereof a repeating unit having a photographically useful group and at least one repeating unit having an imidazole group; and a compound having at least one functional group which reacts with an imidazole group and at least one other functional group capable of reacting with an imidazole group and a primary amine group, the amount of the compound being sufficient to insure adequate fixation of said polymer.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: August 3, 1999
    Assignee: Eastman Kodak Company
    Inventors: Tienteh Chen, Hwei-ling Yau, Dorothy T. Java
  • Patent number: 5928847
    Abstract: This invention contemplates a multilayer, multicolor photographic element comprising a support, a plurality of dye-forming hydrophilic colloid containing silver halide emulsion layers which are spectrally sensitized to different regions of the visible spectrum including at least one blue-sensitive emulsion layer, a green-sensitive emulsion layer, and a red-sensitive emulsion layer. Each of the silver halide emulsion layers includes imaging silver having at least 25 weight percent ultrathin tabular grains having a thickness of less than 0.07 microns. One of the silver halide emulsion layers is a topmost silver halide emulsion layer having a water swell percentage which is greater than any other light-sensitive emulsion layer.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: July 27, 1999
    Assignee: Eastman Kodak Company
    Inventors: Gary W. Visconte, Alfred B. Fant, Yongcai Wang, Ronald G. Olsen
  • Patent number: 5879870
    Abstract: Improvements in post process Dmin are provided in a photographic element that has a preferred coupler, hardener, and permanent solvent. The coupler of the element comprises between about 20 and 40 percent by weight of the coupler and oil phase components and the element further comprises chromanol stabilizer.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: March 9, 1999
    Assignee: Eastman Kodak Company
    Inventors: Thomas A. Rosiek, Alberto M. Martinez, Walter H. Isaac
  • Patent number: 5766820
    Abstract: A silver halide photographic light sensitive material is disclosed which comprises a support and provided thereon, a hydrophilic colloid layer comprising at least one silver halide emulsion layer and at least one non-light sensitive layer, the hydrophilic colloid layer being hardened with at least one hardener selected from the group consisting of a carboxyl active hardener, a vinylsulfone type hardener, an epoxy type hardener and a triazine type hardener, wherein a silver halide emulsion layer closest to the support of the silver halide emulsion layers contains a dye in the form of dispersed solid particles or a non-light sensitive layer closest to the support of the non-light sensitive hydrophilic colloid layers contains a dye in the form of dispersed solid particles, and the thickness swell percentage of the photographic component layer is 10 to 100%.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: June 16, 1998
    Assignee: Konica Corporation
    Inventors: Junichi Fukawa, Seiji Hidaka, Takeo Arai
  • Patent number: 5712081
    Abstract: A method of reproducing an electronically stored medical image on a hardcopy material is disclosed, said material comprising a support and on only one side thereof a silver halide emulsion layer and a hydrophilic colloid layer, wherein said emulsion layer comprises red sensitized homogeneous cubic silver chloride, silver chloroiodide, silver chlorobromide or silver chlorobromoiodide crystals having not less than 70 mole % of chloride ions and preferably not less than 90 mole %; not more than 1 mole % of iodide ions and an average crystal size of from 0.12 to 0.30 .mu.m and more preferred from 0.15 to 0.25 .mu.m; wherein said crystals are coated in an amount, expressed as an equivalent amount of silver nitrate of from 2 to 6 g per sq.m.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: January 27, 1998
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Hieronymus Andriessen, Freddy Henderickx
  • Patent number: 5667960
    Abstract: A method for hardening gelatin comprises the step of mixing gelatin with a compound represented by the following formula (I), (II) or (III): ##STR1## wherein R.sub.1 and R.sub.2 independently represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group or R.sub.1 and R.sub.2 combine with each other to form a nitrogen-containing heterocyclic ring; J represents an organic group; 1 represents an integer of 2 to 5; and m represents an integer of 1 to 5.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: September 16, 1997
    Assignee: Konica Corporation
    Inventors: Yasushi Usagawa, Masato Nishizeki
  • Patent number: 5658721
    Abstract: Hydrophilic colloids, such as gelatin, which are employed in the manufacture of photographic elements are commonly treated with a hardening composition, among the most useful of which are hardening compositions containing vinyl sulfone hardening agents such as bis(vinylsulfonyl)methane. In accordance with this invention, citric acid or salts of citric acid are utilized as an effective inhibitor of homopolymerization in such hardening compositions.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 19, 1997
    Assignee: Eastman Kodak Company
    Inventors: Mary Jane Griggs, Lewis Robert Hamilton, Peter Anthony Marr, Philip Raymond Martell
  • Patent number: 5635341
    Abstract: A solution for bleaching or bleach-fixing an exposed and developed silver halide color photographic light-sensitive material contains a ferric complex salt of a compound represented by the following Formula (A-I), (A-II) or (A-III), and a compound represented by the following Formula (B): ##STR1##
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: June 3, 1997
    Assignee: Konica Corporation
    Inventors: Hiroshi Yamashita, Yutaka Ueda
  • Patent number: 5518868
    Abstract: To eliminate the "pi-line" artefact after processing a silver halide industrial photographic X-ray material is disclosed comprising on at least one side of a support, at least one gelatino silver halide emulsion layer and a total amount of silver halide, corresponding to from 6 to 20 g of silver nitrate per square meter and per side, and at least one non-sensitive protective antistress coating, wherein said photographic material comprises at least one vinyl sulphone compound as a hardening agent and at least one polyoxyalkylene compound as a surfactant in at least one of its hydrophilic layers.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: May 21, 1996
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Raymond Florens, Pieter Perdieus, Andre Roefs
  • Patent number: 5514535
    Abstract: Hydrophilic colloids, such as gelatin, which are employed in the manufacture of photographic elements are commonly treated with a hardening composition, among the most useful of which are hardening compositions containing vinyl sulfone hardening agents such as bis(vinylsulfonyl)methane. In accordance with this invention, a sulfate, such as sodium sulfate, is utilized as both an effective conductivity marker and an effective inhibitor of homopolymerization in such hardening compositions.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: May 7, 1996
    Assignee: Eastman Kodak Company
    Inventors: Lewis R. Hamilton, Peter A. Marr, Philip R. Martell, Kristine F. Ohman
  • Patent number: 5512413
    Abstract: The present invention provides an imaging element comprising on the same side of a support in the order given a base layer, a light sensitive layer containing a silver halide emulsion and a surface layer comprising physical development nuclei characterized in that said base layer and/or said light-sensitive layer comprises gelatin being hardened with a divinylsulfonyl hardener such that the time needed to completely brake down said base layer, light sensitive layer and surface layer using an aqueous solution of 0.14% by weight of NaOCl at 25.degree. C. is between 1000s and 1600s. A lithographic printing plate can be obtained with such imaging element according to the silver salt diffusion transfer process and exhibits an improved printing endurance.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 30, 1996
    Assignee: AGFA-Gevaert N.V.
    Inventors: Lode Deprez, Eddy Michiels
  • Patent number: 5472834
    Abstract: To eliminate the "pi-line" artefact after processing a silver halide industrial photographic X-ray material is disclosed comprising on at least one side of a support, at least one gelatino silver halide emulsion layer and a total amount of silver halide, corresponding to from 6 to 20 g of silver nitrate per square meter and per side, and at least one non-sensitive protective antistress coating, wherein said photographic material comprises at least one vinyl sulphone compound as a hardening agent and at least one polyoxyalkylene compound as a surfactant in at least one of its hydrophilic layers.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: December 5, 1995
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Raymond Florens, Pieter Perdieus, Andre Roefs
  • Patent number: 5439791
    Abstract: New types of modified gelatins are disclosed, modified at part of the free carboxyl groups of the polypeptide chain, by the introduction of a new end-standing amino, sulphinic acid or thiol group. The modified gelatins show an enhanced reactivity towards vinylsulphonyl hardeners. The invention further includes hardened modified gelatin types and hydrophilic elements containing them. In particular, a differentially hardened multilayer element, preferably a photographic element, is disclosed.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: August 8, 1995
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Piet Kok, Jean-Marie Dewanckele, Johan Loccufier, Eddy Michiels, Frank Michiels
  • Patent number: 5411856
    Abstract: Novel compounds represented by formula (I) ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen or alkyl, R.sub.3 represents hydrogen, alkyl, substituted alkyl or CONR.sub.1 R.sub.2, and n is 0 to 6, can be used to harden gelatin. The compounds are particularly useful for hardening gelatin of a photographic element.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: May 2, 1995
    Assignee: Eastman Kodak Company
    Inventors: Edgar E. Riecke, Kenneth G. Harbison
  • Patent number: 5354648
    Abstract: A radiographic assembly comprising:a radiographic element which comprises a support and a front and back pair of silver halide emulsion layers coated on the opposite sides of the support, anda front and back pair of intensifying screens adjacent said front and back emulsion layers, respectively,wherein at least one of said silver halide emulsion layers shows a swelling index lower than 140% and a melting time of from 45 to 120 minutes, and the contrast difference between said pair of silver halide emulsion layers is at least 0.5,wherein the X-ray stimulated light emission difference between said pair of intensifying screens is at least 0.6 IogE, andwherein the average imagewise cross-over of said radiographic element is lower than 5% at optical density of from 0.5 to 1.75 and in the range of from 5 to 15% at optical density of from 1.75 to 3.25, said imagewise cross-over being measured according to the formula described in the specificaton.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: October 11, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Marco Bucci, Renzo Torterolo, Pierfiore Malfatto, Marco Beruto
  • Patent number: 5336592
    Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a support having thereon a photographic layer including a silver halide emulsion layer wherein the outermost surface of said photographic layer has a pH value of from 5.4 to 5.9 and said silver emulsion layer contains a compound represented by the following formula I; ##STR1## wherein R.sub.1 is an alkyl group, a cycloalkyl group or an aryl group; R.sub.2 is an alkyl group, a cycloalkyl group, an acyl group or an aryl group; R.sub.3 is a substituent, n is 0 or 1; X.sub.1 is a substituent capable of splitting off upon coupling reaction with the oxidation product of a color developing agent; and Y.sub.1 is an organic group. The light-sensitive material is excellent in stability during storage and gives stable photographic characteristics even when pH value of developer is varied.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: August 9, 1994
    Assignee: Konica Corporation
    Inventors: Shigeo Chino, Takashi Kadowaki, Toyoki Nishijima
  • Patent number: 5316902
    Abstract: Hydrophilic organic colloids such as collagen or gelatin are modified for use in photographic elements such as film or paper, or for use as reagents in automated dry chemical analyzers. The modification comprises reaction of some of the carboxy groups attached to the polypeptide with (i) a amide bond forming agent, e.g. 1-pyrrolidinylcarbonylpyridinium chloride, and (ii) a di- or triamine, such as piperazine, diethylenetriamine or ethylenediamine. Such modification enables that colloid to react faster with a gelatin hardener such as bis(vinylsulfonyl)methane (BVSM). When coated over an equal amount of unmodified gelatin, and both layers imbibed with BVSM, a modified gelatin layer showed an enzyme resistance greater than that of the unmodified gelatin. This demonstrates that the modified gelatin hardened preferentially.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: May 31, 1994
    Assignee: Eastman Kodak Company
    Inventors: Donald P. Specht, Kenneth G. Harbison
  • Patent number: 5286598
    Abstract: Disclosed is a high-sensitive and super-high contrast silver halide photographic material suitable to use in photomechanical process. The material comprises a support having thereon having at least one light-sensitive silver halide emulsion layer and another hydrophilic colloid layer, wherein at least one of the emulsion layer or the other hydrophilic colloid layer contains a hydrazine derivative and a redox compound capable of releasing a development inhibitor by oxidation and further contains at least one hardening agent represented by formula (A): ##STR1## wherein R represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; and n represents 0 or 1.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: February 15, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Minoru Sakai, Shigeru Ohno, Hisashi Okamura
  • Patent number: 5246824
    Abstract: Light-sensitive silver halide photographic elements are disclosed comprising a support and silver halide emulsion layer or layers, wherein at least one of said silver halide emulsion layers contains tabular silver halide grains having an average diameter:thickness ratio of at least 3:1 and highly deionized gelatin hardened with a compound of formula (CH.sub.2 .dbd.CH--SO.sub.2 --).sub.n --A, wherein A is an n-valent organic group containing at least one hydroxy group and n is 2,3 or 4.The light-sensitive materials can be advantageously used in high temperature processing in automatic processors which include transporting rollers and have good characteristics of resistance to pressure marking.
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: September 21, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gerolamno Delfino, Riccardo Gallesio
  • Patent number: 5071736
    Abstract: A silver halide photographic material comprising a film support having thereon at least one hydrophilic colloid layer, at least one of which is a photosensitive silver halide emulsion layer, wherein the film support is a polyester film having a water content of at least 0.5 wt %, and at least one gelatin-containing layer contains a vinylsulfone based film hardening agent.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: December 10, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Hisashi Okamura, Seimi Satake
  • Patent number: 5063145
    Abstract: A silver halide color photographic material, comprising at least one red-sensitive silver halide emulsion layer; at least one green-sensitive silver halide emulsion layer; and at least one blue-sensitive silver halide emulsion layer, wherein the layers are coated on a support and the photosensitive material comprises at least one compound which reacts with the oxidation products of color developing agents during development and releases a bleach accelerator, and the swelling factor of the photosensitive material in the development bath is at least 2.8.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: November 5, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Ken Sakanoue
  • Patent number: 4999282
    Abstract: An improved silver halide photographic material having at least one layer of a light-sensitive silver halide emulsion that is spectrally sensitized with a sensitizing dye of the following general formula (1) to light having a wavelength of 750 nm and above. Said silver halide emulsion is prepared by a process which comprises generating silver halide grains by adding a solution of a water-soluble silver salt and a solution of a water-soluble halide to a solution containing a protective colloid, aggregating the generated silver halide grains with a polymeric flocculating together with the protective colloid, and removing the dissolved matter; ##STR1## where Z.sub.1 and Z.sub.3 each represents the non-metallic atomic group necessary to form an optionally substituted benzothiazole, benzoxazole, naphthothiazole or naphthoxazole nucleus; R.sub.1 and R.sub.2 each represents a saturated or unsaturated aliphatic group; Z.sub.2 represents a 5- or 6-membered ring of carbon atoms; A represents a hydrogen atom when Z.sub.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: March 12, 1991
    Assignee: Konica Corporation
    Inventors: Kiyoshi Sato, Kouji Ono
  • Patent number: 4990439
    Abstract: A silver halide light-sensitive photographic material having a support and provided thereon, hydrophlic colloidal layers including at least one silver halide light-sensitive emulsion layer is disclosed. The silver halide emulsion layer comprises a silver halide emulsion (I) prepared by adding a high-molecular flocculant under at least one of Conditions (1) through (3) to a silver halaide emulsion (II) prepared by a water-soluble silver salt solution and a water-soluble halide solution to a protevtive colloid solution so as to flocculate and settle a silver halide grain together with a protective colloid for desalting of dissolved substances, and by dispersing again the desalted silver halide emulsion in a protective colloid solution;Condition (1): a temperature of the silver halide emulsion (II) is not lower than 30.degree. C.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: February 5, 1991
    Assignee: Konica Corporation
    Inventors: Kazuyoshi Goan, Takuji Hasegawa
  • Patent number: 4990438
    Abstract: Disclosed is a direct positive light-sensitive photographic material having at least one silver halide emulsion layer containing inner latent image type silver halide grains not previously fogged, which gives a direct positive image after image exposure by surface development after application of fogging treatment or while applying fogging treatment, wherein the inner latent image type silver halide grains comprise substantially silver chloride, and the silver halide emulsion layer or a hydrophilic colloid layer adjacent thereto contains at least one active halide type or active vinyl type gelatin hardener, and at least one compound represented by the formula (I) or (II) described in the specification. This direct positive light-sensitive silver halide photographic material is particularly excellent in stability with lapse of time.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: February 5, 1991
    Assignee: Konica Corporation
    Inventors: Keiji Ogi, Eiichi Sakamoto, Tomomi Yoshizawa
  • Patent number: 4975360
    Abstract: A silver halide photographic light-sensitive material comprising a support provided thereon with photographic layers including at least one silver halide emulsion layer and at least one non-light-sensitive layer is disclosed. The silver halide emulsion layer comprises silver halide grains comprising not less than 80 mol % of silver chloride. At least one of the photographic layers contains an ultraviolet absorbing agent which is in the liquid state at ordinary temperature. And at least one of the photographic layers is hardened with a vinylsulfon hardner. The photographic material has a high developing rate and a high antipressure property, so it is suitable for a rapid processing.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: December 4, 1990
    Assignee: Konica Corporation
    Inventors: Masao Sasaki, Kaoru Onodera
  • Patent number: 4962016
    Abstract: A silver halide photographic light-sensitive material which has an excellent gradation and an excellent pressure resistance. The photographic material comprising a support and, provided thereon, a photographic component layer including a silver halide emulsion layer in which the sewlling degree of said photographic component layer is not higher than 150 and said silver halide emulsion layer is added with elementary sulfur.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: October 9, 1990
    Assignee: Konica Corporation
    Inventors: Shigeo Chino, Mitsuhiro Okumura
  • Patent number: 4921785
    Abstract: A silver halide photographic material comprises a support having thereon at least one light-sensitive silver halide emulsion layer, at least one layer of said material comprising gelatin crosslinked with a crosslinking agent, said crosslinks being capable of being cleaved on reduction.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: May 1, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koki Nakamura, Ichizo Toya