Heterocyclic Patents (Class 430/440)
  • Patent number: 5604082
    Abstract: A method has been disclosed of processing an exposed silver halide photographic material comprising at least one coated hydrophilic silver halide emulsion layer comprising tabular grains rich in chloride, bounded by [100] or [111] major faces, characterized by the steps of developing, followed by fixing, rinsing and drying the said material, wherein developing proceeds in a developer, comprising hydroquinone in an amount from 0 to 30 g per liter, an auxiliary developer, as silver halide complexing agents alkali metal sulphite salts in an amount from 1 to 50 g per liter, at least 1 g of a compound corresponding to the formula (I), a precursor thereof, a derivative thereof and/or a metal salt thereof ##STR1## wherein the substituents are defined in the main embodiment of the specification.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: February 18, 1997
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Freddy Henderickx, Hieronymus Andriessen, Ann Verbeeck
  • Patent number: 5593817
    Abstract: A photographic developing solution and a method of developing silver halide materials in the said developing solution is disclosed, the said developing solution comprising hydroquinone in an amount from 0 to 30 g per litre, an auxiliary developer, and silver halide complexing agents in an amount from 0 to 50 g per litre, characterized in that said developer further comprisesin amounts from 0.1 to 5 g per litre a compound corresponding to the formula (I), accompanied by charge compensating anions,Z'N.sup.+ --R--N.sup.+ Z" (I)wherein at least divalent group R contains at least one oxyethylene group and wherein Z' and Z", being the same or different, are composed of enough atoms to form a heterocyclic aromatic 5- or 6-ring;andat least 1 g of a compound corresponding to the formula (II), a precursor thereof, a derivative thereof and/or a metal salt thereof ##STR1## wherein each of A, B and D independently represents an oxygen atom or NR.sup.1 ;X represents an oxygen atom, a sulphur atom, NR.sup.2 ; CR.sup.3 R.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: January 14, 1997
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Freddy Henderickx, Ann Verbeeck, Pascal Meeus, Hieronymus Andriessen
  • Patent number: 5589323
    Abstract: The invention comprises a process for forming a high contrast photographic image including the steps of imagaewise exposing a silver halide photographic element containing a hydrazine compound which functions as a nucleating agent, wherein the element is free of incorporated amine boosters. The exposed element is developed with a chemically stable aqueous alkaline developing solution that is free of dihydroxybenzene developing agents and has a pH between 9.5 and 11. The developing solution comprises an ascorbic acid developing agent; an auxiliary developing agent; and a combination of an alkali metal carbonate and an alkali metal borate comprising between 0.125 and 0.5 molar concentration of the carbonate and between 0.04 and 0.35 molar concentration of the borate.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: December 31, 1996
    Assignee: Sun Chemical Corporation
    Inventors: John L. Adkins, Dinesh P. Patel
  • Patent number: 5587276
    Abstract: A method for forming a silver halide photographic image comprising developing a silver halide photographic material with a developing solution containing an ascorbic acid developing agent, substantially free from hydroquinone and having a pH of 8.5 to 11.0, the silver halide photographic material comprising a support formed of a syndiotactic styrenic polymer and a silver halide emulsion layer formed on at least one surface thereof, the emulsion layer or another hydrophilic colloidal layer containing a hydrazine derivative, and the total amount of gelatin of the emulsion layer being 2.5 g/m.sup.2 or less, thereby reducing black spot fog and improving dimensional stability of the photographic material.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: December 24, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kazunobu Katoh
  • Patent number: 5578433
    Abstract: A method of processing a silver halide photographic material with a developer containing a compound represented by formula (A), wherein the developer further contains at least one compound represented by formula (B) or (C): ##STR1##
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: November 26, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinnichi Morishima, Kazumi Nii
  • Patent number: 5543286
    Abstract: A dry process silver salt photosensitive material is disclosed which has a support and a photosensitive layer. The photosensitive layer contains at least a photosensitive silver halide or photosensitive silver halide forming component, an organic silver salt and a pyrrole compound. The photosensitive material has a broad latitude for heat development and can form images with a high contrast.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: August 6, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Ueno, Tetsuro Fukui, Motokazu Kobayashi, Takehiko Ooi, Kenji Kagami, Masao Suzuki, Katsuya Nishino
  • Patent number: 5541027
    Abstract: A method is disclosed in converting silver halide to silver by use of a developer containing two compounds which can be titrated in a single potentiometric titration with silver nitrate and based on the titration an additional quantity of the two compounds are added to depleted developer.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: July 30, 1996
    Assignee: E. I. Du Pont de Nemours and Comapny
    Inventor: Peter Wuelfing, Jr.
  • Patent number: 5503966
    Abstract: Photographic developing compositions are provided that are free of dihydroxybenzene developing agents and are used in the processing of photographic elements. The developing compositions have a pH in the range of from 10.1 to 10.9 and comprise at least 0.17 moles per liter of an ascorbic acid developing agent, 0.3 to 0.5 moles per liter of a sulfite and 0.2 to 0.4 moles per liter of a carbonate buffer. Also provided is an ecologically advantageous method for processing photographic elements which utilizes the non-toxic developing compositions.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: April 2, 1996
    Assignee: International Paper Company
    Inventors: Sylvia Adae-Amoakoh, Bruce M. Resnick
  • Patent number: 5503965
    Abstract: The present invention improves the running stability of a developer comprising an ascorbic acid instead of hydroquinone as a developing agent. The present invention provides a process for development of a black-and-white silver halide photographic material, which comprises use of a development replenisher for black-and-white silver halide photographic material comprising an ascorbic acid and/or derivative thereof which has a pH value of at least 0.5 higher than that of the development starting solution.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: April 2, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Eiichi Okutsu
  • Patent number: 5474879
    Abstract: An alkaline, hydroquinone free, aqueous black-and-white radiographic developer comprising(a) an ascorbic acid developing agent;(b) a 3-pyrazolidone auxiliary developing agent;(c) an organic antifoggant;(d) a sulfite antioxidant;(e) a buffer;(f) a sequestering agent; and(g) A development accelerator selected from formulas I and II as follows: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 represent alkyl of 1 to 8 carbon atoms or R.sub.1, R.sub.2, and R.sub.3 taken together with N atom to which they are attached form a 6 or 7 membered ring and X represents a tosylate ion, halide, or BF.sub.4.sup.-.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: December 12, 1995
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Joan F. Rachel
  • Patent number: 5384232
    Abstract: A process of developing exposed silver halide elements comprises developing said element in a developer in the presence of a development accelerator compound as defined. The development accelerator compounds include pyridinium, or pyridinium and and imidazolium compounds. The process is applicable to standard and hydrazine-containing films and to hydroquinone and/or ascorbic acid-based developers. The development accelerator may be incorporated into the developer or into the silver halide emulsion.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: January 24, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Julie C. Bishop, Dominic M. Chan, Dennis S. Donald, Ludovic Fodor, William R. Pangratz, Glenn M. Russo, John R. Shock
  • Patent number: 5376510
    Abstract: There is described a concentrated photographic silver halide developing solution which comprises from 50 to 150 g/liter of an ascorbic acid type compound of the general formula I: ##STR1## or alkali metal salts thereof, in which the group R represents a hydroxylated alkyl group, and at least one basic compound the anion of which is carbonate, sulphite or hydroxide of which the cation is an alkali metal, especially sodium or potassium, the total sodium to total potassium ion ratio in the concentrated developing solution being from about 50:50 to 0:100 (mole: mole).Preferably the concentrated solution is entirely aqueous but it may comprise a proportion of water-miscible organic solvents such as ethyl alcohol, or glycol solvents.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: December 27, 1994
    Assignee: Ilford Limited
    Inventors: Michael J. Parker, Anthony M. Lannon, Terence C. Webb, William E. Long
  • Patent number: 5362621
    Abstract: A direct positive silver halide photographic material and a method for forming a high contrast image using the same are disclosed, in which a pre-fogged direct positive silver halide emulsion layer contains a salt of a nitrogen-containing compound having at least one pyridine nucleus and at least one pyridinium nucleus. The photographic material, after imagewise exposure, is developed with an alkaline developer containing a developing agent, preferably a reductance compound. The photographic material provides high contrast characteristics having a gamma exceeding 10.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: November 8, 1994
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Naoki Obi, Kiyoshi Suematsu, Yasuhiko Kojima, Masatoshi Katayama, Yasuo Shigemitsu
  • 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: 5288590
    Abstract: A high contrast photographic image is formed by development of a photographic material with an amine-free developer having a low pH value. The photographic material has at least one silver halide emulsion on a support. The silver halide emulsion in the emulsion layer contains an iridium salt and/or a rhodium salt and comprises a gold-sensitized and sulfur-sensitized silver chlorobromide emulsion or silver chloroiodobromide emulsion having a silver chloride content of 50 mol% or more and a silver iodide content of 5 mol% or less. The emulsion layer contains a hydrazine compound represented by formula (I): ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group, which contains a partial structure, --O(--CH.sub.2 CH.sub.2 O).sub.n --, --O(--CH.sub.2 CH(CH.sub.3)O).sub.n -- or --O(--CH.sub.2 CH(OH)CH.sub.2 O).sub.n --, wherein n is an integer of 3 or more, as a part of the R.sub.1 substituent, or contains a quaternary ammonium cation as a part of the R.sub.1 substituent; G.sub.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: February 22, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Ken-ichi Kuwabara, Takashi Hoshimiya
  • Patent number: 5284733
    Abstract: A silver halide photographic material is disclosed. The photographic material comprises a support having coated thereon one or more hydrophilic colloidal layers, at least one of the hydrophilic colloidal layers being a negative working silver halide emulsion layer, wherein said silver halide emulsion layer or another hydrophilic colloidal layer contains a water-soluble polymer or copolymer having a quaternary ammonium salt in a repeating unit. The process for forming a high contrast negative image using the photographic material is also disclosed.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: February 8, 1994
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Yasuhiko Kojima, Naoki Obi, Yasuo Shigemitsu, Kiyoshi Suematsu
  • Patent number: 5284739
    Abstract: Photographic materials having incorporated sulphonyhdrazide color developing agents. Such photographic materials have at least two color-forming units, each of which has a silver halide emulsion layer and a photographic coupler. A ballasted heterocyclic sulphonhydrazide color developing agent is present in the material in droplets of a high boiling point solvent. A method of forming a photographic color image using such materials is also provided.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: February 8, 1994
    Assignee: Eastman Kodak Company
    Inventors: David Clarke, John D. Goddard, Paul L. R. Stanley, Nigel E. Milner
  • Patent number: 5278034
    Abstract: A process for forming a color image comprises the step of developing an image-wise exposed silver halide color photographic material with a color developing composition containing an N-(4-aminophenyl)pyrrolidine derivative such as ##STR1## which produces an excellent hue in a rapid process.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: January 11, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobutaka Ohki, Koichi Nakamura, Masato Taniguchi
  • Patent number: 5264323
    Abstract: An improved photographic developing solution is free of dihydroxybenzene developing agents such as hydroquinone, has a pH in the range of from 9.5 to 11.5 and comprises (1) an ascorbic acid developing agent, (2) an auxiliary super-additive developing agent and (3) a carbonate buffering agent in a concentration of at least 0.5 molar. The developing solution is broadly useful in black-and-white development but is most advantageously employed in a process for forming a high-contrast image utilizing a silver halide photographic element comprising a hydrazine compound which functions as a nucleating agent and an amino compound which functions as an incorporated booster. The developing solution is ecologically advantageous, exhibits excellent stability with respect to seasoning effects, and provides high speed and good upper scale contrast combined with a low level of pepper fog and a moderate degree of chemical spread.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: November 23, 1993
    Assignee: Eastman Kodak Company
    Inventors: Michael D. Purol, Paul A. Zielinski, Donald L. Kerr
  • Patent number: 5236816
    Abstract: An improved photographic developing solution is free of dihydroxybenzene developing agents such as hydroquinone, has a pH in the range of from 9.5 to 11.5 and comprises (1) an ascorbic acid developing agent, (2) an auxiliary super-additive developing agent and (3) a carbonate buffering agent in a concentration of at least 0.5 molar. The developing solution is broadly useful in black-and-white development but is most advantageously employed in a process for forming a high-contrast image utilizing a silver halide photographic element comprising a hydrazine compound which functions as a nucleating agent and an amino compound which functions as an incorporated booster. The developing solution is ecologically advantageous, exhibits excellent stability with respect to seasoning effects, and provides high speed and good upper scale contrast combined with a low level of pepper fog and a moderate degree of chemical spread.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: August 17, 1993
    Assignee: Eastman Kodak Company
    Inventors: Michael D. Purol, Paul A. Zielinski, Donald L. Kerr
  • Patent number: 5223380
    Abstract: A process for forming an image comprises color-developing an image-wise exposed silver halide color photographic photosensitive material in the presence of a p-phenylenediamine color developing agents such as ##STR1## Due to the effect of the specific color-developing agent, there can be obtained an image having a quite high fastness to light.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: June 29, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Mikoshiba, Mitsugu Tanaka
  • Patent number: 5206123
    Abstract: A method for high contrast development of an image-wise exposed photographic element comprising a support and at least one silver halide emulsion layer, which method comprises contacting said exposed element in the presence of a hydrazine compound with an aqueous alkaline developing solution which has a pH between 10 and 13 and contains a dihydroxybenzene developing agent a 3-pyrazolidinone or an aminophenol developing agent sulphite ions and a contrast promoting amount of an amino compound characterized in that said developing solution further contains an aprotic solvent corresponding to general formula (I) or (II) : ##STR1## wherein R.sub.1 represents alkyl, substituted alkyl, alkylamino or substituted alkylamino, andR.sub.2 and R.sub.3 each independently represent alkyl substituted alkyl orwherein R.sub.1 together with R.sub.2 represent the necessary atoms to form together with the carbon and the nitrogen atom respectively to which they are attached, a heterocyclic ring, and R.sub.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: April 27, 1993
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Richard A. Ooms, Piet Kok
  • Patent number: 5196298
    Abstract: A photographic developing solution for immersion development is disclosed showing a pH of at least 12.0 and containing more than 0.4 moles/liter of a sugar derivative, or an alkali metal salt thereof, corresponding to general formula (I): ##STR1## wherein X represents an oxygen atom or an imino group, and n represents a positive integer from 1 to 4, and R represents a hydroxy group when n is 1, and R represents a hydroxy group or a hydrogen atom when n is 2 to 4.Preferred sugar derivatives according to the present invention are l-ascorbic acid and iso-ascorbic acid. In a most preferred embodiment there are substantially no other developing agents and no sulphite ions present. When developing a graphic arts photographic material lith quality is obtained. The disposal of depleted solutions can be performed in an ecologically safe way.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: March 23, 1993
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Pascal F. Meeus, Peter M. Willems, Gino L. De Rycke
  • Patent number: 5194367
    Abstract: A method for processing a silver halide photographic material for infrared laser scanner is described, comprising developing the silver halide photographic material which comprises a support having thereon at least one hydrophilic colloidal layer including at least one silver halide emulsion layer with an automatic developing machine, wherein the silver halide emulsion layer contains silver chloroiodobromide grains having a silver iodide content of 0 to 2 mol% and a silver chloride content of 0 to 30 mol%, the hydrophilic colloidal layer has a swelling percentage of 200% or less, and as a developing solution for the development step in the automatic developing machine, a single developing solution containing a 3-pyrazolidone developing agent represented by formula (I) is used therein: ##STR1## wherein R.sub.0 represents a substituted or unsubstituted aryl group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: March 16, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Minoru Yamada, Takashi Toyoda, Naoki Arai
  • 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: 5156940
    Abstract: A new class of photographic stabilizers is prepared and their use in photographic materials is disclosed. These compounds are 1-phenyl-3-pyrazolidinone derivatives corresponding to following general formula: ##STR1## wherein: A represents a group capable of adsorbing at the surface of silver halides;L is a divalent linking group and r is 0 or 1;R1 and R2 each represent hydrogen, lower alkyl or substituted lower alkyl.The photographic materials containing the substances of the invention are preferably DTR mono-sheet elements which after processing can serve as planographic printing plates.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: October 20, 1992
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Piet Kok, Jos A. Vaes, Jean-Marie O. Dewanckele, Luc J. Wabbes
  • Patent number: 5098819
    Abstract: An environmentally-safe, non-toxic non-hydroquinone and non-alkali metal hydroxide containing photographic developer composition is provided comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrazolidone developer compound.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: March 24, 1992
    Inventor: Audenried W. Knapp
  • Patent number: 5041363
    Abstract: A method of processing a silver halide photographic material with a compact and high speed automatic processor is disclosed. The developing solution contains hydroquinone, 1-phenyl-4-methyl-3-pyrazolidone, and 1-phenyl-4,4-dimethyl-3-pyrazolidone or 1-phenyl-4-methyl-4-hydroxy-methyl-3-pyrazolidone. The method is suitable for an X-ray photographic material.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: August 20, 1991
    Assignee: Konica Corporation
    Inventor: Haruhiko Sakuma
  • Patent number: 5037726
    Abstract: A method for forming a direct positive image having a high Dmax and a low Dmin, which comprises image-wise exposing a photographic light-sensitive material having on a support at least one photographic emulsion layer containing unprefogged internal latent image-type silver halide grains and developing the photographic light-sensitive material after or while fogging to form direct positive image, wherein the aforesaid development is performed in the existence of at least one compound selected from the group consisting of compounds represented by formula (I), (II), (III), (IV), (V) or (VI), acid salts of compounds represented by formula (I) to (IV) provided substituents thereof contain an amino group, and acid salts of compound represented by formula (V) or (VI); ##STR1## wherein symbols are defined as in claim 1.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: August 6, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetsuro Kojima, Noriyuki Inoue
  • Patent number: 5017454
    Abstract: A heat-developable color light sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder, a non-diffusible compound capable of releasing a diffusible dye upon reduction, an electron donor compound and an electron transfer agent, said electron transfer agent being represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents hydrogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; R.sub.5 represents a halogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group; R.sub.6, R.sub.7, R.sub.8 and R.sub.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: May 21, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Nakamine, Ken Kawata, Toshiki Taguchi
  • Patent number: 4988603
    Abstract: A processing method for silver halide photographic material is disclosed, which stably provides images having high contrast and high dot quality with little degradation in sensitivity by rapid processing.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: January 29, 1991
    Assignee: Konica Corporation
    Inventors: Yasuhiko Takamuki, Takeshi Habu, Junichi Fukawa
  • Patent number: 4978603
    Abstract: An image-forming process which comprises after imagewise exposing a silver halide photographic material having at least one silver halide emulsion layer composed of silver halide grains containing at least 1.times.10.sup.-6 mol of a rhodium salt per mol of silver and having a mean grain size of not larger than 0.15 .mu.m with a developer meeting the following conditions (a) to (d);(a) the developer substantially contains dihydroxybenzene only as the developing agent,(b) the developer contains at least 0.18 mol/liter of a free sulfite,(c) pH thereof is at least 10.5, and(d) the developer contains at least 20 mg/liter of a compound represented by formula (I): ##STR1## wherein X.sub.1 represents a hydrogen atom or a nitro group and X.sub.2 and X.sub.3 each represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: December 18, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Morio Yagihara, Yoshihiro Takagi
  • Patent number: 4965176
    Abstract: There is disclosed a method for processing a light-sensitive silver halide color photographic material, characterized in that the light-sensitive silver halide color photographic material contains a core-shell type-internal latent image type silver halide emulsion a shell of which contains at least silver chloride, and the light-sensitive silver halide color photographic material is processed with a color developing solution containing the compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms which may have a substituent or substituents, or R.sub.1 and R.sub.2 may be combined to form a ring, provided that the case where R.sub.1 and R.sub.2 are hydrogen atoms at the same time is excluded.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: October 23, 1990
    Assignee: Konica Corporation
    Inventors: Masao Ishikawa, Satoru Kuse
  • Patent number: 4956267
    Abstract: A method for forming a direct positive color image by image-wise exposing to light a light-sensitive material having at least one internal latent image type silver halide emulsion layer which is unfogged and color image-forming couplers on a support; either (1) subjecting the resulting material to fogging exposure to light and/or processing it with a nucleating agent before development, and then developing the resulting material with a surface developing solution containing an aromatic primary amine type color developing agent, or (2) developing the material after the image-wise exposure with a surface developing solution containing an aromatic primary amine type color developing agent under fogging exposure and/or in the presence of a nucleating agent; and bleach-fixing the resulting material, wherein the color developing solution contains at least one compound selected from the group consisting of compounds represented by the following general formulae (I), (II), (III) and (IV): ##STR1## wherein X represent
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: September 11, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Tatsuo Heki, Noriyuki Inoue, Takatoshi Ishikawa, Nobutaka Ohki, Morio Yagihara, Kiyoshi Morimoto, Hiroshi Fujimoto, Kazuto Andoh
  • Patent number: 4948714
    Abstract: Method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: August 14, 1990
    Assignee: Ilford Limited
    Inventors: William E. Long, Kenneth M. McCombe, Marion R. Palmer, Terence C. Webb
  • Patent number: 4927734
    Abstract: A silver halide photographic light-sensitive material contains at least one negative-working silver halide emulsion layer composed of substantially surface latent image type monodispersed silver halide grains. The emulsion layer or another hydrophilic colloidal layer contains a compound of general formula I or II: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a hydrogen atom, or a substituted or unsubstituted alkyl or aryl group, and if one of R.sub.3 and R.sub.4 is a hydrogen atom, the other thereof is not a hydrogen atom. Disclosed also is a process which forms a photographic image by employing the material as described above, or a developer containing the compound as shown above.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: May 22, 1990
    Assignee: Dainippon Ink. and Chemicals, Inc.
    Inventors: Shuji Rokutanda, Yasuo Higemitsu, Akiyoshi Tsuchida, Yukihiro Yamakoshi
  • Patent number: 4906553
    Abstract: A process for processing a silver halide black and white photographic material, which comprises processing, after imagewise exposing, a silver halide black and white photographic material spectrally sensitized by a sensitizing dye with a processing solution containing at least one compound satisfying the following condition 1 and/or a salt thereof in an amount of at least 5.times.10.sup.-5 mol/liter;Condition 1:when 4 ml of an aqueous solution of 8.0.times.10.sup.-2 mol/liter of the compound is added to a mixture of 2 ml of an aqueous solution of 4.0.times.10.sup.-4 mol/liter of anhydro-5,5'-dichloro-9-ethyl-3,3'-bis(3-sulfopropyl)thiacarbocyanine hydroxide.pyridinium salt and 1 ml of an aqueous solution of 1.0.times.10.sup.-1 mol/liter of potassium chloride and the resultant solution is diluted with water to 10 ml, the molecular extinction coefficient of the aqueous solution at 624 nm is not higher than 1.0.times.10.sup.5.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: March 6, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiko Ikegawa, Minoru Yamada, Masaki Okazaki, Junji Nishigaki
  • Patent number: 4879204
    Abstract: A silver halide photographic material is described, comprising a support having formed thereon at least one silver halide emulsion layer and at least one light-insensitive hydrophilic colloid layer, wherein at least one of layers consisting of said at least one silver halide emulsion layer and said at least one light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and wherein at least one of said at least one light-insensitive hydrophilic colloid layer that is formed on the uppermost silver halide emulsion layer contains a dye.
    Type: Grant
    Filed: August 16, 1988
    Date of Patent: November 7, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kunio Ishigaki, Toshiro Takahashi, Yuji Mihara, Keiichi Adachi, Shigeru Ohno, Masahiro Okada, Naomi Saeki
  • Patent number: 4853321
    Abstract: A method of forming a color image and a silver halide color photographic material comprising a reflective support having thereon at least one light-sensitive layer containing at least one coupler which forms a dye upon a coupling reaction with an oxidation product of an aromatic primary amine color developing agent and a silver halide emulsion which contains at least 80% by mol of silver chloride and substantially no silver iodide the method comprising processing with a color developing solution which contains not more than 0.002 mol of a bromine ion per liter and substantially no benzyl alcohol for a development time of not more than 2 minutes and 30 seconds in the presence of at least one compound represented by the following formulae (I), (II), or (III), as defined in the specification.The method of forming a color image and the silver halide color photographic material according to the present invention enable rapid processing to be conducted while controlling the fog formation with high sensitivity.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: August 1, 1989
    Assignee: Fuji Photo Film, Co., Ltd.
    Inventors: Yasuhito Momoki, Masahiro Asami, Nobuo Sakai, Shigeaki Otani
  • Patent number: 4851325
    Abstract: A process for processing silver halide color photographic materials, which comprises processing, after image-wise exposure, a silver halide color photographic material with a color developer containing an aromatic primary amine color developing agent and a compound represented by the following general formula (I): ##STR1## wherein n represents an integer of at least 1; R represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group or the n-valent groups corresponding to the groups when n represents an integer of at least 2; and A represents an organic group containing a carbon atom, an oxygen atom, a nitrogen atom, or a sulfur atom and forms a saturated or unsaturated 3- to 8-membered ring with the nitrogen atom, said A is substituted or unsubstituted and may be condensed with a benzene ring or a heterocyclic ring.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: July 25, 1989
    Assignee: Fuji Photo Film Co., Inc.
    Inventors: Kiyoshi Morimoto, Hideaki Naruse
  • Patent number: 4810623
    Abstract: A process for developing a photographic material containing on a support an image-wise exposed silver halide emulsion layer of which the silver halide is substantially silver chloride and in which the photographic material before its exposure contains already at least one silver halide developing agent in a hydrophilic colloid binder in waterpermeable relationship with the silver halide, said process containing the step of contacting the exposed photographic material with an aqueous alkaline liquid, called activator liquid, being initially substantially free from developing agent(s), said contacting being not followed by a silver complex diffusion transfer processing, characterized in that said aqueous alkaline liquid contains a primary and/or secondary amine.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: March 7, 1989
    Assignee: Agfa-Gevaert N.V.
    Inventors: Hendrik E. Kokelenberg, Benedictus J. Jansen
  • Patent number: 4798783
    Abstract: A method of processing a silver halide color photographic material in which the color developer used comprises an aromatic primary amine color developing agent and a compound of formula: ##STR1## wherein X represents a trivalent group necessary to complete a condensed ring;R.sup.1 and R.sup.2 each represents an alkylene group, an arylene group, an alkenylene group, or an aralkylene group;and, if desired, does not contain a substantial amount of benzyl alcohol to achieve improved stability and color developability of the color developer and a reduction of fog generation in the running development process.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: January 17, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Hiroshi Fujimoto, Nobutaka Ohki, Morio Yagihara
  • Patent number: 4772545
    Abstract: A silver halide photographic material in which a silver iodobromide emulsion having an iodide content of 2 mole % or more and an organometallic salt functioning as a development inhibitor are employed in combination, whereby an improvements in graininess and sharpness of a developed image are achieved and high photographic speed is retained.A process for producing silver images using the silver halide photographic material is also disclosed.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: September 20, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shingo Nishiyama, Kiyoshi Kawai
  • Patent number: 4753869
    Abstract: Salts of 1-phenyl-3-pyrazolidinones with organic sulphonic acids, which are useful photographic silver halide developing agents.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: June 28, 1988
    Assignee: Ciba-Geigy AG
    Inventors: William E. Long, Malcolm D. Tirel, Monica H. Gent, Terence C. Webb
  • Patent number: 4719175
    Abstract: There are described novel pyrazole compounds represented by the formula ##STR1## wherein Y is a silver halide developing substituent or a precursor thereof; R is --OH, --NH.sub.2 or --NHSO.sub.2 --R.sub.1 ; R.sub.1 is alkyl having from 1 to 6 carbon atoms or phenyl; and m and n are the same or different and each is an integer of from 1 to 6. The pyrazole compounds are useful as intermediates in the preparation of azo and azomethine dye developers or as silver halide developing agents.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: January 12, 1988
    Assignee: Polaroid Corporation
    Inventors: Efthimios Chinoporos, Elbert M. Idelson, Patrick F. King
  • Patent number: 4684604
    Abstract: Photographic elements and processes are described which employ a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; wherein:(a) the hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent,(b) the azo group formation causes the release of the photographically useful group, and(c) the released photographically useful group does not contain the linking group or the nitrogen atoms of the hydrazide moiety.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: August 4, 1987
    Assignee: Eastman Kodak Company
    Inventor: John W. Harder
  • Patent number: 4681836
    Abstract: A silver halide photographic material having at least one silver halide emulsion layer which contains silver halide grains containing from 1.times.10.sup.-8 to 8.times.10.sup.-6 mole of a rhodium salt per mole of silver, and containing in said emulsion layer or another hydrophilic colloidal layer a compound represented by formula (I)R.sup.1 -NHNH-G-R.sup.2 (I)wherein R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted imino group; is exposed to imagewise pattern of light and then development-processed with a developer containing 0.15 mole/liter or more of sulfite ion and having a pH adjusted to from 9.5 to 12.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: July 21, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Yoshio Inagaki, Kimitaka Kameoka
  • Patent number: 4650746
    Abstract: This invention relates to a photographic element comprising a support, and coated on the support at least one negative-working photographic emulsion comprising radiation-sensitive silver halide grains capable of forming a surface latent image and a binder, and in the support or in a remaining hydrophilic colloid layer coated on the support in an amount sufficient to increase contrast, a hydrazine compound of the formula ##STR1## wherein R.sup.1 is a phenyl nucleus having a Hammet sigma value-derived electron withdrawing characteristic of less than +0.30.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: March 17, 1987
    Assignee: Eastman Kodak Company
    Inventors: Joseph M. Simson, Harold E. Jordan
  • Patent number: H1020
    Abstract: A developer for developing a silver halide light-sensitive material and an image forming method using the developer are disclosed. The developer contains a compound represented by the following formula I or II and a compound containing a thioether group. ##STR1## wherein Y, Y.sub.1 and Y.sub.2 are each a hydrogen atom or a mercapto group, and R and R.sub.1 are each a substituent. A silver halide light-sensitive material containing silver halide grains comprising not less than 50 mol % of silver chloride and have a ratio of (100) surface and (111) surface of not less than 5 is preferably used in the image forming method. Developing speed and sensitivity of light-sensitive material can be rised by use of the developer.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: February 4, 1992
    Assignee: Konica Corporation
    Inventors: Syoji Nishio, Kazuhiro Yoshida
  • Patent number: H1508
    Abstract: An image-forming process for silver halide photographic material is disclosed, in which the photosensitive material have at least one silver halide emulsion layer on a support and contains a hydrzaine compound in the emulsion layer or other constitutional layers. The image-forming process comprises developing the photographic material containing the hydrozine compound of formula (I) with the developing agent of formula (II).
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: December 5, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Masato Hirano