Containing Hydroquinone Patents (Class 430/438)
  • Patent number: 8975012
    Abstract: Multi-layer articles are described that are capable of forming color images. The articles include at least six layers, four thermally activatable layers (layers 1-4) and two blocking layers (layer 5 and 6). The layers are arranged such that layer 5 is disposed between layers 1 and 2 and layer 6 is disposed between layers 3 and 4. Thermally activatable layers 1 and 2 are activatable upon exposure to light of a first write wavelength, and blocking layer 5 is adapted to at least partially block light of the first write wavelength. Thermally activatable layers 3 and 4 are activatable upon exposure to light of a second write wavelength, and blocking layer 6 is adapted to at least partially block light of the second write wavelength. At least one, and possibly all of the thermally activatable layers include a light to heat convertor composition and a color changing compound.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: March 10, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Douglas S. Dunn, William Ward Merrill, Przemyslaw P. Markowicz
  • Publication number: 20040130697
    Abstract: An apparatus for selectively modifying a reflection preventing film formed on a substrate to change the optical characteristic of a region in the reflection preventing film. The apparatus includes: a substrate holding mechanism; a modifying light irradiating mechanism; and a processing position changing mechanism configured to change a processing position of the modifying light on the substrate by changing a relative position between an irradiation position of the modifying light and the substrate held by the substrate holding mechanism.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 8, 2004
    Applicant: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Masayoshi Kobayashi
  • Patent number: 6759187
    Abstract: This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I: wherein: the substituents are as defined in the application.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: July 6, 2004
    Assignee: Eastman Kodak Company
    Inventors: Wojciech K. Slusarek, Xiqiang Yang, Mark E. Irving, David H. Levy, Jared B. Mooberry, James J. Seifert, James H. Reynolds, Lyn M. Irving
  • Publication number: 20030022113
    Abstract: A silver halide photographic material comrises a support having first and second opposing surfaces, at least one light-sensitive emulsion layer that is provided on the first surface side, and a hydrophilic colloid layer that is provided on the second surface side, wherein the hydrophilic colloid layer comprises at least one compound represented by general formula (I) or general formula (II) below: 1
    Type: Application
    Filed: December 17, 2001
    Publication date: January 30, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventor: Takahiro Goto
  • Patent number: 6506546
    Abstract: This invention comprises an imaging element comprising an imaging layer having associated therewith a compound of Structure I: wherein PUG is a photographically useful group; LINK 1 and LINK 2 are linking groups; TIME is a timing group; T represents t independently selected substituted or unsubstituted alkyl or aryl groups, t is 0, 1, or 2 and if t is 2, the T groups can form a ring; HET is a heterocyclic group which optionally can form a ring with a T group; R12 is hydrogen, substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or R12 can form a ring with a T group or with HET; 1 is 0 or 1; m is 0, 1, or 2; and n is 0 or 1.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: January 14, 2003
    Assignee: Eastman Kodak Company
    Inventors: Zbyslaw R. Owozarczyk, Xiqiang Yang, David T. Southby
  • Patent number: 6479198
    Abstract: A silver halide light-sensitive material comprises a support and a silver halide gelatin emulsion layer. The silver halide gelatin emulsion layer or an optionally provided hydrophilic layer contains a tanning developing agent. According to the first embodiment of the present invention, the tanning developing agent has a molecular structure in which two to six benzenediol or benzenetriol rings are connected with a linking group. According to the second embodiment of the invention, the tanning developing agent consists of a polymer having side chains containing benzenediol or benzenetriol rings. According to the third embodiment of the invention, the tanning developing agent consists of a benzenediol or benzenetriol ring having an aliphatic substituent group having 5 to 40 carbon atoms or an aromatic substituent group having 7 to 40 carbon atoms. A tanning developing solution and a lithographic printing plate are also disclosed.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: November 12, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naonori Makino, Kaku Sakata
  • Publication number: 20020064672
    Abstract: A support for an imaging material, which not only can give an imaging material and a print thereon having a high gloss appearance and being free of non-uniformity in gloss but also is improved in the property of peeling from a cooling roll and which has high stiffness and can be stably produced at a high speed, the support being a resin-coated-paper-based support for an imaging material, in which (1) each of a resin sheet on a side (front side) where an image is to be formed and a base paper has a multi-layered structure, (2) the base paper has a multi-layered structure, the resin sheet on the front surface is a polyolefin resin sheet and the paper layer constitution of the base paper is specified, or (3) the front resin sheet has a multi-layered structure constituted of an upper layer containing at least 50% by weight of a polyethylene resin having a density of at least 0.940 g/cm3 and a lower layer containing a largest amount of a polyethylene resin (b) having a density of less than 0.
    Type: Application
    Filed: December 5, 2001
    Publication date: May 30, 2002
    Applicant: Mitsubishi Paper Mills Ltd.
    Inventors: Masayuki Tsubaki, Touru Noda, Tomoichi Morita, Massashi Kubbota
  • Patent number: 6335102
    Abstract: A resin coated paper-based support for an imaging material comprises a multilayered base paper and a polyolefin resin sheet on at least the image forming side of the paper base. The thickness, fiber length, pulp composition, and freeness of the paper layers comprising the multilayered base paper base are controlled in order to obtain an imaging material with high gloss, stiffness, and curl resistance. The polyolefin resin sheet may comprise one or more layers.
    Type: Grant
    Filed: February 22, 1998
    Date of Patent: January 1, 2002
    Assignee: Mitsubishi Paper Mills Ltd.
    Inventors: Masayuki Tsubaki, Touru Noda, Tomoichi Morita, Massashi Kubbota
  • Publication number: 20010026908
    Abstract: A method for processing a silver halide light-sensitive material employing an automatic processing machine is disclosed. A developer comprises compounds represented by the formula (1), and a fixer comprises thiosulfate salts, water-soluble aluminum salts, and at least one type of crystallization retarding agents and substantially comprises no boron compound.
    Type: Application
    Filed: December 6, 2000
    Publication date: October 4, 2001
    Inventor: Shoji Nishio
  • Patent number: 6294316
    Abstract: An object of the present invention is to provide a simple process for manufacturing a flexible printed wiring board having fine metal bumps. A resin coating 21 and a resist film 24 are formed in this order on the surface of a metal film 11 and on the surface of each metal bump 16 formed on the metal film 11, and a pressure is applied on the surface to depress the resist film 24 on the metal bump 16, followed by etching. As the surface of the resin coating 21 is partially exposed at the depressed portion of the resist film 24, etching of the resin coating 21 proceeds from that portion to bulge the surface of the metal bump 16 from the resin coating 21.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: September 25, 2001
    Assignee: Sony Chemicals Corp.
    Inventors: Yutaka Kaneda, Akira Tsutsumi, Hiroyuki Hishinuma
  • Patent number: 6048675
    Abstract: A development processing method comprising a step of developing a silver halide photographic material having at least one silver halide emulsion layer with a developing solution containing a hydroquinone developing agent, wherein said developing solution has a pH of from 9.0 to 11.0, and contains a compound represented by formula (I) and a compound represented by formula (II) in a concentration ratio of the compound represented by formula (II)/the hydroquinone developing agent of from 0.03 to 0.12: ##STR1## wherein the symbols in these formulae are defined in the specification.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: April 11, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Hirano, Kohzaburoh Yamada
  • Patent number: 6033836
    Abstract: Low silver black-and-white photographic silver halide elements, such as radiographic films, can be processed quickly using black-and-white developing and fixing compositions having reduced photoprocessing activity. The entire process is fairly rapid and effective despite the lowered concentrations of photographic developing and fixing agents.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: March 7, 2000
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Robert E. Dickerson
  • Patent number: 5962199
    Abstract: An image forming process of a silver halide photographic material comprising a glass support having thereon a silver halide emulsion layer is disclosed, the process comprising exposing with laser beam spot with a diameter of 0.05 to 5 .mu.m and developing the exposed photographic material with a developer, wherein the silver halide emulsion layer contains silver halide grains having an average grain size of 0.08 to 0.2 .mu.m and a chloride content of at least 50 mol %; the developer containing a developing agent selected from hydroquinone and ascorbic acid, and a developing agent selected from p-methyl-aminophenol, 1-phenyl-3-pyrazolidone and 1-pheny-4-dimethyl-3-pyrazolidone; and the developed photographic material having a contrast of 4.8 to 12.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: October 5, 1999
    Assignee: Konica Corporation
    Inventor: Tomonobu Moriya
  • Patent number: 5882841
    Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein at least one of the silver halide emulsion layer and other hydrophilic colloid layers comprises fine polymer particles containing at least one hydrazine compound represented by the following general formula (NB):A--(B).sub.m (NB)wherein A represents a connecting group; m represents an integer of from 2 to 6; and B represents a group containing a hydrazine structure. The sliver halide photographic light-sensitive material exhibits an ultrahigh contrast, an excellent storage stability and an excellent processing stability and is prevented from the occurrence of processing unevenness. A method for processing the silver halide photographic light-sensitive material is also disclosed.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: March 16, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshihide Ezoe, Kouta Fukui, Kohzaburoh Yamada
  • Patent number: 5876913
    Abstract: Dual-coated radiographic elements are disclosed employing thin tabular grain emulsions that exhibit increased covering power and colder image tones by limiting hydrophilic colloid coating coverages in the thin tabular grain emulsion layers to less than 15 mg/dm.sup.2.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: March 2, 1999
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, Anthony Adin, Marcia K. Hansen
  • Patent number: 5871890
    Abstract: Black-and-white elements, such as radiographic films, can be processed in roomlight because they include certain light absorbing dyes and desensitizers. Processing is carried out by processing the exposed element using a two-stage process in the same light-tight processing container. In the first stage, development is initiated with a developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent in a concentration of from about 0.1 to about 0.5 mol/l, and a sulfite at from about 0.25 to about 0.7 mol/l. After an appropriate time, a fixing agent (other than a sulfite) is introduced into the processing container to provide a combined developing/fixing compositions, and development and fixing are carried out simultaneously. The processing method is carried out quickly, usually within about 90 seconds, including a washing step at the end. The presence of sulfite and high pH in both stages decolorize or deactivate the particulate dyes.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: February 16, 1999
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Jeffrey S. Baugher, Robert E. Dickerson
  • Patent number: 5856077
    Abstract: A mammographic medical diagnostic radiographic element is disclosed that produces sharp images and is capable of being processed in less than 60 seconds. Each of imaging and antihalation fully forehardened hydrophilic colloid layer units are coated on the opposite sides of a transparent film support at a hydrophilic colloid coating coverage of less than 55 mg/dm.sup.2. The radiation-sensitive silver halide grains contained in the imaging layer unit are provided by a tabular grain emulsion coated at a coverage capable of providing a maximum density on processing of greater than 3.6. To provide a mid-scale contrast of greater than 3.0 and a lower scale contrast of greater than 2.2, the radiation-sensitive grains (a) exhibit an equivalent circular diameter coefficient of variation grain of less than 15 percent and (b) contain rhodium in a normalized molar concentration of less than 1.times.10.sup.-6 based on silver.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: January 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, Patrick M. Jeffries, Marcia K. Hansen
  • Patent number: 5840472
    Abstract: A developer for a silver halide photographic photosensitive material containing at least one of monocyclic dimercaptotriazine compounds, bis-type dimercaptotriazine compounds, mercapto-1,2,4-triazine compounds and dimercaptopyrimidine compounds, and a process for developing a silver halide photographic photosensitive material using the developer. The compounds of the present invention provides excellent effect in preventing silver stains without affecting the photographic properties of the photographic material.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: November 24, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hirotomo Sasaki, Harumi Watanabe, Kohzaburoh Yamada
  • Patent number: 5824459
    Abstract: A dual-coated radiographic element is disclosed that is capable of simultaneously providing acceptable thoracic cavity imaging of both heart and lung anatomical features while employing a symmetrical coating format. The element allows reduced processing times while avoiding wet pressure sensitivity. This is achieved by reducing crossover to less than 5 percent using a crossover reducing dye in a polydispersed tabular grain emulsion layer coated nearest each major surface of the support. The tabular grain emulsion contains a rhodium dopant. A polydispersed outer tabular grain emulsion layer is coated over the polydispersed tabular grain emulsion coated nearest the support. Total hydrophilic colloid per side and the distribution of silver between the emulsion layers is controlled to allow processing in less than 45 seconds while avoiding wet pressure sensitivity.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 20, 1998
    Assignee: Eastman Kodak Company
    Inventor: Robert E. Dickerson
  • Patent number: 5824460
    Abstract: A dual-coated radiographic element is disclosed that is capable of providing improved gastrointestinal tract images. Specifically, the radiographic elements are capable of simultaneously providing a maximum density of less than 3.0, a contrast in the range of from 1.0 to 2.0 over a lower exposure region (typically achieved by adding barium to the gastrointestinal tract) extending over an exposure range of 0.3 log E, a contrast of in the range of from 1.0 to 2.0 over a higher exposure region (typically achieved by adding an effervescent substance to the gastrointestinal tract) extending over an exposure range of 0.6 log E, and a contrast greater than 3.5 over an intermediate exposure region extending over an exposure range of 0.6 log E. To accomplish this, underlying and overlying spectrally sensitized tabular grain emulsion layers are coated on each major surface of a support.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 20, 1998
    Assignee: Eastman Kodak Company
    Inventor: Robert E. Dickerson
  • Patent number: 5804357
    Abstract: A method for forming images on a silver halide light-sensitive material includes exposing a material which contains at least one light-sensitive silver halide emulsion layer and at least one hydrophilic colloidal layer, either of which includes a latex polymer having active methylene groups, and developing the exposed material with a developer which contains a dihydroxybenzene developing agent and an auxiliary developing agent showing superadditivity, wherein the following requirements are satisfied: the pH increase observed when adding 0.1 mole/l developer of NaOH to the developer.ltoreq.0.25; 9.5.ltoreq.initial pH of the developer.ltoreq.11.0; and the amount of the developer supplemented.ltoreq.225 ml/m.sup.2.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: September 8, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junichi Yamanouchi, Hidetoshi Watanabe, Kunio Ishigaki, Seiichi Yamamoto, Kouta Fukui
  • Patent number: 5798204
    Abstract: A development processing method is described, which includes the steps of (a) exposing an ultrahigh-contrast silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and (b) developing the exposed silver halide photographic material with a developer while the developer is replenished with a development replenisher, wherein the developer and the development replenisher each contains a dihydroxybenzene developing agent and an auxiliary developing agent exhibiting a superadditive property to the dihydroxybenzene developing agent, and both the developer and the development replenisher have such a property that an increase of the pH is 0.25 or less when 0.1 mol of sodium hydroxide is added to 1 liter thereof; the developer has a pH from 9.5 up to but excluding 11.0; and the developer replenisher is added in an amount of 225 ml/m.sup.2 or less.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: August 25, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouta Fukui, Mitsunori Hirano, Nobuaki Inoue
  • Patent number: 5795704
    Abstract: A method is disclosed of hardener-free processing a forehardened silver halide photographic material comprising a film support and on one or both sides thereof at least one silver halide emulsion layer characterized in that(1) each silver halide emulsion layer comprises spectrally sensitized cubic silver chloride or silver bromochloride grains having not more than 25 mole % of bromide in a total amount of coated silver expressed as the equivalent amount of silver nitrate in the range of from 2.5 to 4 g/m.sup.2 ;(2) the forehardened material has a water absorption of less than 4 grams per gram of gelatin, wherein said water absorption has been determined by making the difference by weight of the material when dry and when having been dipped in demineralized water of 25.degree. C. during 3 minutes followed by squeezing off the superficial water;(3) hardener-free processing includes development with a developing solution comprising thiocyanate ions in amounts from 10.sup.-3 up to 10.sup.-2 molar.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: August 18, 1998
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Peter Willems, Ann Verbeeck, Freddy Hendrickx
  • Patent number: 5780212
    Abstract: The present invention concerns a developer for silver halide photographic products comprising a co-developing agent of the 1-phenyl-3-pyrazolidinone type. These co-developing agents comprise solubilizing groups which are not attached directly to the phenyl ring or the pyrazolidine ring, and improve the stability of the developer composition.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: July 14, 1998
    Assignee: Eastman Kodak Company
    Inventors: Jacques Roussilhe, Siu C. Tsoi
  • Patent number: 5770351
    Abstract: There is described a method of processing silver halide photographic material in a processing machine using a developing solution which comprises either a hydroquinone type developing agent or a reductone type developing agent, together with an electron transfer agent as an auxiliary developing agent, and with at least one basic compound the anion of which is carbonate, sulphite or hydroxide, where in the presence of a compound of formula (I), Ar is an aromatic ring or heterocyclic aromatic ring which is optionally substituted.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: June 23, 1998
    Assignee: Ilford Limited
    Inventors: William Edward Long, Michael John Parker
  • Patent number: 5763148
    Abstract: A silver halide photographic activation material is disclosed comprising a film support, on one or both sides thereof at least one gelatino silver halide emulsion layer and between said emulsion layer and said support a hydrophilic undercoat layer comprising as a binder at least 50% of a loaded latex polymer, said latex polymer being loaded with at least one developing agent, further characterised in that water absorption during activation processing is not higher than 2.5 g per gram of binder present in said material.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: June 9, 1998
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Peter Willems, Freddy Henderickx, Marcel Monbaliu
  • Patent number: 5725998
    Abstract: A method of developing an exposed black and white silver halide photographic light-sensitive material with developer using an automatic processor is disclosed, the developing comprising supplying replenisher for developer in an amount of not more than 200 ml per m.sup.2 of the material, the material containing a hydrazine derivative and an infectious development nucleation agent, and the developer having a pH value of 10.0 to 11.2 and containing a dihydroxy benzene compound, a 3-pyrazolidone compound or an aminophenol compound, a sulfite of 0.3 to 1.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: March 10, 1998
    Assignee: Konica Corporation
    Inventor: Takeshi Sanpei
  • Patent number: 5545508
    Abstract: A process for forming a black-and-white high contrast negative photographic silver image by development of a silver halide photographic element with an aqueous alkaline photographic developer composition comprising a dihydroxybenzene developing agent, an auxiliary superadditive developing agent, an antifogging agent, an antioxidant compound, a combination of buffering agents and a sequestering agent, characterized by the fact that: a) the auxiliary developing agent is an aminophenol compound, b) the combination of buffering agents comprises at least a first buffering agent represented by carbonate compounds and at least a second buffering agent represented by phosphate compounds, the total amount of said first buffering agent and said second buffering agent being at least 35 grams per liter, band c) the pH of said aqueous alkaline photographic developer composition is in the range 9.0 to 11.0.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: August 13, 1996
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Carlo Marchesano, Elda Moizo, Filippo Faranda
  • Patent number: 5534389
    Abstract: Disclosed are a method for processing a black-and-white light-sensitive silver halide photographic material containing at least one kind of a tetrazolium compound or a hydrazine compound with a developing solution containing a polyhydroxybenzene type developing agent, wherein the developing solution is a developing solution prepared by using a solid processing agent, a solid processing agent for a black-and-white light-sensitive silver halide photographic material containing a tetrazolium compound or a hydrazine compound comprising a polyhydroxybenzene type developing agent and a solid processing agent for a black-and-white light-sensitive silver halide photographic material containing a tetrazolium compound or a hydrazine compound comprising a thiosulfate fixing agent and water in an amount of 300% or less based on an amount of the thiosulfate fixing agent.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: July 9, 1996
    Assignee: Konica Corporation
    Inventors: Takeo Arai, Tadashi Sekiguchi, Takeshi Habu, Shiyouji Nishio, Hiroyuki Usiroyama, Kenichi Tanaka, Akira Kobayashi
  • Patent number: 5508152
    Abstract: A processing method is disclosed, comprising development-processing a photographic material comprising a support having thereon a silver halide emulsion layer or a constituent layer adjacent to the emulsion layer which contains (i) a silver halide composition comprising at least one of silver bromochloride, silver chloroiodide, or silver bromochloroiodide each having a silver chloride content of 90 mole % or more, or silver chloride, and (ii) a compound represented by the following Formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom, an ammonium group or an alkali metal atom; and R.sub.2 represents a hydrogen atom, an alkyl group or an aryl group, with a developing solution containing (1) a dihydroxybenzene compound, and (2) an ascorbic acid or a derivative thereof in an amount of at least 5 mole % based on the amount of the dihydroxybenzene compound.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: April 16, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Harumi Toyoda, deceased, Eiichi Okutsu, Tadashi Ito, Kiyoshi Morimoto
  • Patent number: 5484690
    Abstract: A silver halide photographic material is disclosed, comprising a support having thereon one or more hydrophilic colloid layers, at least one of the hydrophilic colloid layers being a silver halide emulsion layer comprising silver halide grains with a silver chloride content of at least 90 mol %, wherein at least one hydrophilic colloid layer contains at least one compound selected from the compounds represented by formulae (I), (II) and (III); and at least one compound selected from the compounds represented by formulae (A), (B) and (C): ##STR1## wherein the substituents are as defined in the claims. The silver halide photographic material can be handled in an environment which can essentially be referred to as bright room.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: January 16, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takahiro Goto
  • Patent number: 5427891
    Abstract: Disclosed is a silver halide photographic material comprising:at least one silver halide emulsion layer;a hydrazine derivative; andat least one hydroquinone derivative represented by general formula (LI) or (LII): ##STR1## wherein G represents hydrogen atom or an alkyl group having 1 to 17 carbon atoms;n represents an integer of 1 to 5; andR.sub.1 to R.sub.10 each represent a hydrogen atom, an alkyl group, an aryl group, a hydroxyl group, an alkoxy group, an aryloxy group, a halogen atom, a primary, secondary or tertiary amino group, a carbonamido group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group, a carboxyl group or a sulfo group.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: June 27, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Hirano, Nobutaka Ohki, Nobuaki Inoue, Tetsuo Yamaguchi
  • Patent number: 5419997
    Abstract: A method for processing a silver halide photographic material is disclosed and the photographic material has a support thereon, comprising at least one silver halide emulsion layer and containing a hydrazine compound represented by following formula (I) in the above emulsion layer or the other hydrophilic colloid layers, which comprises processing the silver halide photographic material after exposure in a developing solution containing:(1) 0.2 to 0.75 mole/liter of a dihydroxybenzene developing agent,(2) 0.001 to 0.06 mole/liter of a 1-phenyl-3-pyrazolidone or p-aminophenol auxiliary developing agent,(3) 0.3 to 1.2 mole/liter of a free sulfite ion, and(4) a compound represented by following formula (II), and having a concentration ratio of a compound represented by formula (II) to a dihydroxy developing agent of 0.03 to 0.12 and pH of 9.0 to 11.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: May 30, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mitsunori Hirano
  • Patent number: 5397687
    Abstract: The preparation of x-ray materials, especially suitable for non-destructive testing applications, is described. The emulsion layers of said material are comprising silver halide emulsion grains containing at least 75 mole % of silver chloride and less than 25 mole % of silver bromide and are characterized by a ratio between the amount of gelatin and the amount of silver halide, being expressed as the equivalent amount of silver nitrate, of less than 0.6. Hardening of said material is performed in such a way that the amount of demineralized water of 25.degree. C. absorbed in 3 minutes is less than 2.5 g per gram of gelatin present in said material. A rapid processing system is available with a total processing time of less than 3 minutes with a developer and fixer being substantially free from hardening agents and the fixer being substantially free from ammonium ions.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: March 14, 1995
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Peter Willems, Freddy Henderickx, Gino De Rycke, Romain Bollen
  • Patent number: 5389502
    Abstract: An alkaline, aqueous black-and-white photographic developer and developing method. The developer includes hydroquinone developing agent, auxiliary developing agent, dialdehyde hardener, organic antifoggant, sulfite antioxidant, buffer, and sequestering agent selected from the group consisting of oligomeric carboxylic acid substituted hydrocarbons.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: February 14, 1995
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Jean M. Buongiorne
  • Patent number: 5385811
    Abstract: A method for processing silver halide photographic material is disclosed, which has a support thereon at least one silver halide emulsion layer and at least one protective layer provided over said emulsion layer in which each of the photographic materials contains colloidal silica in at least one emulsion layer and is at most 200% in the total swelling degree of the whole hydrophilic colloid layers provided on the side of said emulsion layer, and after optical exposure said photographic materials are developed with a developer adjusted to pH 9.5-12.0 and containing at least (1) a hydroquinone developing agent in a concentration of from 0.2 to 0.75 mole/l, (2) an auxiliary developing agent of 1-phenyl-3-pyrazolidone type and/or an auxiliary developing agent of p-aminophenol type in a concentration of from 0.001 to 0.06 mole/l, (3) free sulfite ions in a concentration of from 0.3 to 1.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: January 31, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mitsunori Hirano
  • Patent number: 5382507
    Abstract: A method for processing a first black-and-white silver halide photographic light-sensitive material comprising a hydrazine compound and a second black-and-white silver halide photographic light-sensitive material comprising a tetrazolium compound is disclosed, a photographic layer on the side of a silver halide emulsion layer of each material containing gelatin in an amount of not more than 3.0 g per m.sup.2 of the material, and the process comprising the step of exposing the light-sensitive materials and developing the exposed materials with the same developer having a pH of from 9.5 to 10.7, the developer being replenished with developer replenisher in an amount of not more than 250 cc per m.sup.2 of the light-sensitive materials to be developed.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: January 17, 1995
    Assignee: Konica Corporation
    Inventors: Akira Shimizu, Shoji Nishio, Takeshi Sanpei, Hiroyuki Ushiroyama
  • Patent number: 5368983
    Abstract: A method for forming an image provides high sensitivity, high contrast, and reduced fluctuation in performance due to the deterioration of processing solutions. The method comprises processing a silver halide photographic material having on a support at least two silver halide emulsion layers having different sensitivities, with the emulsion layer closer to the support having a higher sensitivity, in a developing solution containing a di- or trihydroxybenzene compound and a 3-pyrazolidone compound or a developing solution containing a di- or trihydroxybenzene compound and an aminophenol compound in the absence of a hydrazine compound, wherein a characteristic curve obtained has a gradient (a .gamma. value) of 6.0 or more in the segment of the curve from D=0.1 to D=3.0 where D is the density.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: November 29, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasuhiro Okamoto
  • Patent number: 5344741
    Abstract: The present invention provides a developer for silver halide photographic light-sensitive materials which provides super-high contrast and is improved in stability with time. This developer contains at least (1) a developing agent, (2) 10 g/l or more of a hydroquinonemonosulfonate, (3) 0.3 mol/l or more of a sulfite and (4) an amino compound in an amount necessary to accelerate enhancement of contrast and has a pH of 10.5-12.3.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: September 6, 1994
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Tamotu Iwata, Seiichi Sumi
  • Patent number: 5298369
    Abstract: When color reversal materials are developed by a process that comprises prolonged contact with the first, or black-and-white developer, images with a color mismatch or speed deficiency can occur. Such undesirable results can be reduced or eliminated by including in the reversal material, a layer of colloidal elemental silver. The layer can be adjacent to a light sensitive, silver halide-containing layer, which is present within a color record who's speed is to be increased in order to reduce the color mismatch. The amount of colloidal elemental silver employed is less than that used in the art to protect an underlying light sensitive, silver halide layer from exposure by unwanted light.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: March 29, 1994
    Assignee: Eastman Kodak Company
    Inventors: Jal F. Munshi, Henry J. Sniadoch, Richard C. Tuites
  • Patent number: 5296342
    Abstract: For the processing in a total processing time of 60 seconds or less of exposed X-ray materials containing silver bromide or silver bromoiodide emulsions use is made of an aqueous alkaline photographic developing solution, having a pH in the range of 9 to 12, comprising a dihydroxybenzene developing agent, 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidinone as an auxiliary developing agent, at least one organic antifoggant and a compound providing iodide ions.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: March 22, 1994
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Andre Roefs, Francis Sels, Marc Van den Zegel
  • Patent number: 5266442
    Abstract: A method for the production of a silver image with improved contrast by the development of an image-wise exposed photographic silver halide emulsion layer material with a developer liquid containing a hydroquinone in the presence of an auxiliary developing agent, wherein said developer liquid is applied to said photographic material containing silver halide grains that have been chemically sensitized with organic thiosulphonic acid anions in combination with a gold sensitizer in the absence of thiosulphate ions.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: November 30, 1993
    Assignee: Agfa-Gevaert N.V.
    Inventor: Richard A. Ooms
  • Patent number: 5240823
    Abstract: A developer composition comprising a dihydroxybenzene developing agent, a sulfite ion, and an antisludging agent is diluted with water to prepare a developer for the development of photographic silver halide photosensitive material. The components of the composition are divided into a plurality of parts such that the antisludging agent and the dihydroxybenzene developing agent are added to separate parts which are kept apart during storage until they were combined to form the developer.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: August 31, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Minoru Yamada, Takashi Toyoda, Morio Yagihara, Hiroshi Kawamoto
  • Patent number: 5232823
    Abstract: Disclosed is a method for the development of a silver halide light-sensitive black and white material, wherein a silver halide light-sensitive material is developed in the presence of at least one compound represented by the following general formula (I): ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, an ammonium group or a group which is cleaved under alkaline conditions; L represents a bivalent organic group comprising an alkylene group, an alkenylene group, an ether group, a thioether group, --CO--, --CS-- or --NR-- (wherein R represents a hydrogen atom or an alkyl group) alone or a combination of two or more of them; X represents an amino group, an ammonio group, a hydroxyl group or a heterocyclic group; and n represents 0 or 1.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: August 3, 1993
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Kiyoshi Morimoto, Takashi Toyoda
  • Patent number: 5215873
    Abstract: Process for developing photographic silver halide recording elements containing nonionic fluorinated surfactants using a developer containing at least 15 g/L of dihydroxy benzene compound, 0.15 mole/L of alkali metal sulfate and a wetting agent as described in a concentration of at least 0.1 g/L at a pH of no greater than 11.5. Silver halide recording elements that can be developed are those particularly useful in medical diagnostics with X-rays and in reprography.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: June 1, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gunter Kiesslich, Max E. G. Wadewitz
  • Patent number: 5210010
    Abstract: There is described a concentrated developer solution which comprises from about 20 to about 60 g/l of dihydroxybenzene developing agent, preferably hydroquinone, from about 0.5 to about 3.0 g/l of an auxiliary developing agent, preferably 1-phenyl-3 pyrazolidinone, from about 300 to about 500 g/l of potassium sulphite and which is buffered to a pH of from about 8 to about 10 with a buffering agent other than an alkanolamine and which comprises sufficient organic solvent other than an alkanolamine to dissolve the hydroquinone.Such a concentrated developing solution which contains a high concentration of potassium sulphite has when diluted a long useful life and produces images of low graininess.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: May 11, 1993
    Assignee: Ilford Limited
    Inventor: Ross Fielding
  • Patent number: 5187050
    Abstract: A method for processing a silver halide photographic material is described, comprising the steps of:(a) developing a silver halide photographic material comprising a support having thereon at least one hydrophilic colloidal layer, including at least one light-sensitive emulsion layer containing tabular silver halide grains having an aspect ratio of at least about 4, the total number of hydrophilic colloidal layers having a degree of swelling of about 250% or less; and(b) after developing a predetermined amount of said silver halide photographic material, adding a single replenisher of the developer comprising a 3-pyrazolidone developing agent represented by formula (I): ##STR1## wherein R.sub.o represents a substituted or unsubstituted aryl group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: February 16, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Minoru Yamada, Takashi Toyoda, Sumito Yamada
  • Patent number: 5155014
    Abstract: Method for the production of direct-positive images by image-wise exposing a light-sensitive silver halide material comprising a support and an internal latent image-type silver halide emulsion layer and developing said exposed material in the presence of at least one development nucleator and density-increasing amounts of a compound chosen from the class consisting of formic acid, oxalic acid, glyoxylic acid, or salts of these and/or of a compound chosen from the class consisting of polyethylene glycols, with a hydroquinone-type developing solution having a pH not higher than 12.0 and comprising less than 25 g per liter of a hydroquinone and 5 to 100 g per liter of at least one alkanolamine.
    Type: Grant
    Filed: August 14, 1991
    Date of Patent: October 13, 1992
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Jozef P. De Prijcker, Fernand I. Ketels, Jean-Marie O. Dewanckele, Piet Kok
  • Patent number: 5141843
    Abstract: A developer liquid suited for use in development of photographic silver halide emulsion layer materials which liquid contains:1) hydroquinone or a substituted hydroquinone as sole developing agent or said hydroquinone as main developing agent in combination with an auxiliary developing agent in an amount less than 10 mole % with respect to the main developing agent,2) an inorganic compound yielding free sulphite ions in an amount of at least 5 grams per liter,3) an organic anti-fogging agent corresponding to the following general formula (Z): ##STR1## wherein: X.sup.2 represents an alkyl group or an aryl group including said groups in substituted form or an amino group including said group in substituted form;the amount of anti-fogging agent being in the range of 50 mg to 1 g per liter,4) a polymer containing a plurality of alkylene oxide units, and5) the necessary alkaline material to have in said liquid a pH of at least 10.5. Optional additives can also be present in the developing liquid.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: August 25, 1992
    Assignee: AGFA-Gevaert N. V.
    Inventors: Richard A. Ooms, Piet Kok, Jean-Marie O. Dewanckele
  • Patent number: H1263
    Abstract: An image forming method and its apparatus are disclosed. The method comprises exposing a light-sensitive silver halide photographic material having a support and hydrophilic colloid layers provided on both sides of the support and developing the exposed material with a developing solution without immersing it in the developing solution. The apparatus comprises (a) a pair of rollers for transporting the material in a downward direction and (b) a pair of nozzles for feeding the developing solution to both sides of the material, the nozzles being provided above the rollers.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: December 7, 1993
    Assignee: Konica Corporation
    Inventors: Mikio Kawasaki, Masatoshi Iwata, Noboru Hatakeyama, Shinichi Ohtani, Kiyoshi Sato