Having Identified Precipitation Nuclei Or Identified Image Receiving Binder Other Than Nominal Gelatin Patents (Class 430/247)
  • Patent number: 7118836
    Abstract: A substantially transparent conductive layer on a support, the layer comprising an intrinsically conductive polymer e.g. containing an intrinsically conductive polymer optionally containing structural units represented by formula (I): wherein n is larger than 1 and each of R1 and R2 independently represents hydrogen or an optionally substituted C1-4 alkyl group or together represent an optionally substituted C1-4 alkylene group or an optionally substituted cycloalkylene group, preferably an ethylene group, an optionally alkyl-substituted methylene group, an optionally C1-12 alkyl- or phenyl-substituted ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group; and a conductive metal non-uniformly distributed therein and forming of itself a conductive entity; a process for preparing the transparently conductive layer; and light emitting diodes, photovoltaic devices, transistors and electroluminescent devices comprising the above-described conductive layer.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: October 10, 2006
    Assignee: Agfa Gevaert
    Inventor: Hieronymus Andriessen
  • Patent number: 7026079
    Abstract: A process for preparing a substantially transparent conductive layer configuration on a support, the layer configuration comprising in any order at least a first layer containing an intrinsically conductive polymer optionally containing structural units represented by formula (I): wherein n is larger than 1 and each of R1 and R2 independently represents hydrogen or an optionally substituted C1-4 alkyl group or together represent an optionally substituted C1-4 alkylene group or an optionally substituted cycloalkylene group, preferably an ethylene group, an optionally alkyl-substituted methylene group, an optionally C1-12 alkyl- or phenyl-substituted ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group; and a second layer consisting of a non-continuous layer of conductive silver, the process comprising the step of: preparing the second layer by a photographic process; and light emitting diodes, photovoltaic devices, transistors and electroluminescent devices comprising a layer configuration pr
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: April 11, 2006
    Assignee: AGFA Gevaert
    Inventors: Frank Louwet, Tom Cloots, Hieronymus Andriessen
  • Patent number: 6878513
    Abstract: A modified gelatin obtained by reacting (A) a gelatin and (B) a compound which contains a nitrogenous aromatic ring having a mercapto group to form covalent bond with a reactive group in the gelatin, an introduction amount of the compound in the gelatin being 1.0×10?6 mol to 2.0×10?3 mol per 100 g of the gelatin.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: April 12, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Terukazu Yanagi, Mamoru Sakurazawa, Naohiro Takeda, Yoichi Maruyama, Katsuyuki Takada
  • Patent number: 5843628
    Abstract: A color image formation method excellent in discrimination and color image stability after processing which comprises overlaying a heat developable color light-sensitive material with a complexing agent sheet in the presence of a small amount of water therebetween after or during imagewise exposure, said light-sensitive material comprising a support having provided thereon at least a light-sensitive silver halide, a binder, a coupler, a reducing agent and a slightly-water-soluble basic metal compound, said sheet comprising a support having provided thereon at least a compound forming a complex with a metal ion constituting said basic metal compound; and heat developing the light-sensitive material to obtain a color image thereon, wherein the silver chloride content of said silver halide is 80 mol % or more, said complexing agent sheet comprises a physical development nucleus and a solvent for a silver halide, and said reducing agent is at least one compound of specified phenols, hydrazines and hydrazones.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: December 1, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiki Taguchi, Kiyoteru Miyake
  • Patent number: 5834156
    Abstract: A method for processing a photosensitive material characterized in that an exposed photosensitive material is subjected to dip coating with a processing solution, according to which there are no problems encountered in plate making by the conventional dip developing method and coating developing method, rapid processing can be attained, maintenance is easy, less waste processing solution is produced, and lithographic printing plates on which uniform print images can be formed from the top end portion thereof by silver complex diffusion transfer process, and an apparatus used for the processing.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: November 10, 1998
    Assignee: Mitsubishi Papers Mills Limited
    Inventors: Jun Urasaki, Toshiyuki Morito, Masahiko Saikawa, Yoshikazu Takano, Eiji Kanada
  • Patent number: 5707774
    Abstract: According to the present invention, a method is provided for preparing physical development nuclei for use in silver salt diffusion transfer processing, said physical development nuclei comprising a heavy metal sulphide, said method comprising the steps of:precipitating said heavy metal sulphide by bringing a water soluble heavy metal compound in reactive association with a water soluble sulphide in an aqueous liquid andsaid precipitation being carried out in the presence of a hydrophilic polymer so as to disperse said heavy metal sulphide, said hydrophilic polymer comprising a heterocyclic group, characterized in that said heterocyclic group is present in a recurring unit of said hydrophilic polymer, said recurring unit being comprised in said polymer in an amount between 0.1 mol % and 5 mol %.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: January 13, 1998
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Lode Deprez, Ronny De Clercq, Rene De Keyzer
  • Patent number: 5695908
    Abstract: There are disclosed a process for preparing a printing plate which comprises the steps of providing, on a support, a layer containing a water-soluble polymer which becomes water-insoluble by a metal ion, and feeding the metal ion imagewisely from the surface of the layer to form an image pattern comprising the hardened water-soluble polymer on the support, anda plate for preparing a printing plate which comprises a support and a layer containing a water-soluble polymer which becomes water-insoluble in contact with a metal ion provided on the surface of the support.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: December 9, 1997
    Assignee: Mitsubishi Paper Mills, Limited
    Inventor: Akira Furukawa
  • Patent number: 5691105
    Abstract: The present invention provides a method for obtaining an imaging element suitable for use in a silver salt diffusion transfer process comprising the steps of coating a support with a layer comprising physical development nuclei and a photosensitive layer comprising a photosensitive silver halide emulsion, said photosensitive layer being in water permeable relationship with said image receiving layer, characterized in that said physical development nuclei consist of a substantially homogeneous solid solution of two or more different metals and are prepared by pulsed high flux radiolysis.According to the invention there is further provided a method for making a lithographic printing plate comprising the steps of image-wise exposing an imaging element prepared as defined above and subsequently developing a thus obtained image-wise exposed imaging element by means of an alkaline processing solution in the presence of a developing agent and a silver halide solvent.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 25, 1997
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Rene De Keyzer, Yves Van Meenen
  • Patent number: 5677104
    Abstract: An image formation method is described, which comprises overlaying a silver halide light-sensitive material with a sheet after or during imagewise exposure, the light-sensitive material comprising a support having provided thereon at least a light-sensitive silver halide mainly comprising silver chloride, a hydrophilic binder, a reducing agent and a slightly water-soluble basic metal compound, the sheet comprising a support having provided thereon at least a compound forming a complex with a metal ion constituting said basic metal compound, a physical development nucleus, and a compound represented by the following formula (I) or a compound containing a sulfite ion; and heat-developing the material in the presence of water to form a silver image on at least one of the light-sensitive material and the sheet: ##STR1## wherein Q represents an atomic group necessary to form a 5- or 6-membered imide ring.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 14, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroyuki Hirai, Hiroshi Hara, Kiyoteru Miyake
  • Patent number: 5578415
    Abstract: An optical recording material comprising: a thin film or membrane of a hydrophobic binding agent; and metallic particles having a diameter of 0.003 .mu.m to 3 .mu.m dispersed in said film or membrane wherein the density of said metallic particles is higher near at least one surface of said film or membrane as compared with another portion of said film or membrane, each metallic particle having a nucleus and an outer coating, said outer coating consisting of at least one metal having a melting point of 250.degree. C. to 1800.degree. C. and a thermal conductivity at 0.degree. C. of 5 W.multidot.m.sup.-1 .multidot.K.sup.-1 to 450 W.multidot.m.sup.-1 .multidot.K.sup.-1 wherein the reflectivity of the surface of said film or membrane where the density of said metallic particle is higher is 10 to 90%., a method for preparing the optical recording material and an optical card containing the optical recording material.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: November 26, 1996
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshio Hayashi, Shuichiro Ogawa, Junichi Iwata
  • Patent number: 5387491
    Abstract: A photosensitive transfer sheet layered a releasable colored photosensitive layer comprising modified poly(vinyl alcohol) of either of following general formulae and adhesive and a heat-seal layer provided in turn on a supporter is disclosed, ##STR1## wherein R.sub.1 and R.sub.2 denote hydrogen atoms or alkyl groups independently one another, Y.sup.- denotes a conjugated chlorinic ion of acid, m denotes an integer of 1 to 6, and n denotes 0 or 1), thereby providing a multicolor image-forming material for obtaining high-precision prepress color proof being excellent in the preservability, possible to handle in a light room, water-developable and excellent in the registering accuracy as well.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: February 7, 1995
    Assignee: Nippon Paper Industries, Co., Ltd.
    Inventors: Toshihiko Takada, Norio Yabe, Masahide Takano
  • Patent number: 5362620
    Abstract: The present invention discloses a photographic material comprising on a support a photosensitive layer containing a mixture of silver halide emulsions at least one of which is spectrally sensitized and at least one of which is not spectrally sensitized characterized in that the surface of the silver halide particles of the silver halide emulsion not being spectrally sensitized is loaded with a stabilizer having a mercapto group or the tautomeric thione group thereof such that the surface covered by one molecule of stabilizer is between 10 .ANG..sup.2 and 70 .ANG..sup.2. The loss of speed due to migration of the spectral sensitizer from the sensitized emulsion to the non sensitized emulsion is reduced and can even be inhibited.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: November 8, 1994
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Johan Lamotte, Jean-Marie Dewanckele
  • Patent number: 5073473
    Abstract: A method for forming an image by silver salt diffusion transfer is described, comprises processing an imagewise exposed photosensitive element provided with a layer of photosensitive silver halide emulsion on a support, and an image-receiving element provided with an image-receiving layer containing a silver-precipitating agent on a support, with an alkali processing composition in the presence of a silver halide solvent, to convert at least part of the unexposed silver halide in the emulsion layer into a transferable silver complex salt, to transfer at least part of said complex salt into the image-receiving layer, and to form an image in the image-receiving layer; the processing being carried out in the presence of at least one compound as described.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: December 17, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keizo Koya, Yoshio Idota
  • Patent number: 5043244
    Abstract: A process is described for defined etching of holes using a sliver mask formed by silver diffusion transfer imaging.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: August 27, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Allan Cairncross, Chester A. Thayer, II
  • Patent number: 5043245
    Abstract: Process for the production of a laminated article including a sheet support bearing a silver image produced by the silver complex diffusion transfer process in a layer containing developement nuclei, wherein such supported image is heat-laminated with a protective thermoplastic resin layer of sheet that covers it. The heat-lamination of the nuclei-containing layer with the silver image therein takes place in the presence of at least one of certain heterocyclic black-toning agents which are effective to prevent degradation of the neutral black coloration and density loss of the silver image as a result of heat-lamination.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: August 27, 1991
    Assignee: AGFA Gevaert, N.V.
    Inventors: Leon L. Vermeulen, Robert S. Pauwels, Piet Kok, Jean-Marie O. Dewanckele
  • Patent number: 5030545
    Abstract: A method of forming images by silver salt diffusion transfer in which a photosensitive element which contains an imagewise exposed photosensitive silver halide emulsion layer is developed in the presence of a silver halide solvent using an alkaline processing composition, wherein at least part of the unexposed silver halide of the emulsion layer is formed into a transferable silver complex salt, at least part of the transferable silver complex salt is transferred to an image receiving layer to yield an image in the image receiving layer, wherein non-photosensitive silver precipitation nuclei are included in the photosensitive element. It is possible to obtain images without metallic luster in a stable manner.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: July 9, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Osami Tanabe
  • Patent number: 5009984
    Abstract: A method for processing an imagewise exposed photographic silver halide emulsion material using a receptor element for complexed silver halide which element contains a stabilizing agent corresponding to one of the following general formulae (I) or (II), tautomeric structures or a precursor form thereof: ##STR1## wherein: X represents hydrogen, alkali metal, ammonium or organic amine,Z represents the non-metallic atoms necessary to form a 5- or 6-membered heterocyclic nucleus, andeach of R.sup.1 and R.sup.2 (same or different) represents hydrogen, amino, alkyl, alkenyl, cycloalkyl, aryl, alkoxy, alkylthio, alkylsulfonyl, sulfamoyl, acyl, --SH or a heterocyclic group.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: April 23, 1991
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Gino L. De Rycke, Antonius A. Rutges, Jozef P. De Prijcker
  • Patent number: 4876171
    Abstract: A photographic image is formed on an image-receiving material by imagewise exposing a silver halide photosensitive material, placing the exposed material on an image-receiving material, and subjecting the assembly to silver salt diffusion transfer in the presence of a reducing agent, a physical development nucleus, a complexing compound capable of complexing reaction with a silver ion in the presence of water and/or a hydrophilic thermal solvent as a medium, and optionally, a substantially water-insoluble basic metal compound.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: October 24, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiroyuki Hirai
  • Patent number: 4798779
    Abstract: A process for forming an image by silver salt diffusion transfer comprising developing a light-sensitive element which comprises a support having provided thereon a light-sensitive silver halide emulsion layer which has been imagewise exposed to light by an alkaline processing composition in the presence of a silver halide solvent so that at least a part of silver halide unexposed in said emulsion layer is converted to a transferable silver complex salt, and then transferring at least a part of said silver complex salt to an image-receiving layer containing a silver precipitating agent to form an image on said image-receiving layer, wherein the concentration of said silver precipitating agent in said image-receiving layer is in the range of from 2.times.10.sup.-6 to 8.times.10.sup.-6 mol/m.sup.2 and at least one of said light-sensitive element and said alkaline processing composition contains at least one of a compound represented by formula (I) and a compound represented by formula (II) ##STR1## wherein R.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: January 17, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Idota, Yukio Karino, Hiroshi Hayashi, Hideki Tomiyama
  • Patent number: 4775614
    Abstract: An ecologically advantageous method for fixing a developed photographic silver halide emulsion layer material which involves the steps of:(A) developing an image-wise exposed silver halide emulsion layer with a developing agent in the presence of an aqueous alkaline liquid,(B) bringing the developed photographic material while still wet with the liquid of step (A) with its silver halide emulsion layer side in intimate contact with a water-absorbing layer of a receptor element, which layer comprises an organic hydrophilic colloid binder, a silver halide complexing agent, and in dispersed form a metal sulphide as silver ion scavenging agent,(C) maintaining said photographic material and receptor element in contact to allow the transfer of dissolved complexed silver compound into said receptor element, and(D) separating the photographic material from the receptor element, andwherein said water-absorbing layer contains said metal sulphide in colloidal form with an average grain size below 0.1 .mu.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: October 4, 1988
    Assignee: Agfa-Gevaert N.V.
    Inventor: Gino L. De Rycke
  • Patent number: 4734354
    Abstract: An image-receiving material for a silver salt diffusion transfer process is described, comprising a support having provided thereon an image-receiving layer containing physical development nuclei, wherein the image-receiving layer contains gelatin, a water-soluble fluorescent brightening agent, and a water-soluble vinyl polymer, wherein the weight ratio of the water-soluble fluorescent brightening agent to the gelatin ranges from about 0.02/1 to about 0.5/1 and the weight ratio of the water-soluble vinyl polymer to the water-soluble fluorescent brightening agent ranges from about 0.1/1 to 5/1.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: March 29, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yoshihiro Takagi
  • Patent number: 4605609
    Abstract: Disclosed is an image receiving material for silver complex diffusion transfer process which contains gelatin having a calcium content of about 1,000 ppm or less. This image receiving material provides improved silver image density. Further improvement can be attained when said gelatin has a jelly strength of 280 g or above.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: August 12, 1986
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Koji Okazaki, Yasuo Tsubai, Kimihisa Hamazoe
  • Patent number: 4425421
    Abstract: A process for the production of a sealed laminate especially a security document comprising a support sheet, an image layer containing a photographic image present in a hardened hydrophilic diffusion transfer reversal image-receiving colloid medium made from an image receiving layer containing photosensitive iron(III) compound, and a protective cover sheet is described wherein:(1) the support sheet is of a polymeric heat meltable material,(2) the image layer is disposed adherently on the support sheet to cover the support area only partly and to leave uncovered at least one edge area thereof,(3) the protective sheet is of a heat-meltable material which in the melted state is capable of forming a homogeneous mass with melted support sheet material, and(4) the protective cover sheet is heat sealed to the support sheet in the uncovered areas thereof to form the homogeneous mass, whereby said image layer is sealed between the support sheet and the protective sheet.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: January 10, 1984
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Antonius A. Rutges, Ludovicus M. Mertens, Maurits W. Van Grasdorff
  • Patent number: 4425420
    Abstract: Process for the production of a planographic printing plate by means of the silver complex diffusion transfer reversal process comprising the steps of:image-wise photo-exposing a silver halide emulsion layer; developing the resultant latent image in the presence of a silver halide complexing agent and contacting the exposed silver halide emulsion layer with an anodized aluminium platecharacterized in that the thickness of the anodized surface layer is in the range of 0.50 to 2.00 .mu.m, the anodized plate before contact of the same with the emulsion has been hydration-sealed in the temperature range of 60.degree.-80.degree. C., and the development of the light-sensitive material is carried out with a developing composition having a pH of at least 12, and containing:dissolved sulphite,dissolved thiosulphate, anda mixture of hydroquinone and at least one secondary developing agent of the class of 1-phenyl-3-pyrazolidinones and p-N-methylaminophenol.
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: January 10, 1984
    Assignee: Agfa-Gevaert N.V.
    Inventors: Antoine A. De Jaeger, Gina C. De Lamper, Albert L. Poot, Albert P. Wagemans
  • Patent number: 4400462
    Abstract: Photographic materials and photographic processes employing light sensitive silver halide particles, silver halide particles which are substantially non-light sensitive having been modified with a silver halide solubility reducing agent and internally fogged silver halide particles which are substantially non-light sensitive provide negative silver images of high contrast and high maximum density.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: August 23, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kouzi Ono, Mikio Kawasaki, Mariko Natori, Eiichi Sakamoto
  • Patent number: 4376157
    Abstract: Transfer images of high contrast, high density and high sharpness can be obtained by DTR process wherein all of the physical development nucleus particles are covered with a water permeable colloid having a thickness of at least 10 times the average diameter of the nucleus particles and all of the physical development nucleus particles are substantially two-dimensionally distributed at such intervals as capable of forming a continuous transfer developed silver.
    Type: Grant
    Filed: March 19, 1981
    Date of Patent: March 8, 1983
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Yasuo Tsubai, Yoshikazu Takaya, Takao Senga
  • Patent number: 4375507
    Abstract: Photographic elements, multicolor filters and receivers are disclosed having supports providing microvessels for materials such as radiation-sensitive materials, imaging materials, mordants, silver precipitating agents and materials which are useful in conjunction with these materials. Processes of forming microvessels and introducing materials therein are also disclosed. Processes of forming images are disclosed employing microvessel containing elements. Image transfer processes are disclosed for producing one or a combination of silver and multicolor subtractive primary images alone or in combination with multicolor additive primary images.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: March 1, 1983
    Assignee: Eastman Kodak Company
    Inventor: Keith E. Whitmore
  • Patent number: 4362806
    Abstract: Photographic elements, multicolor filters and receivers are disclosed having supports providing microvessels for materials such as radiation-sensitive materials, imaging materials, mordants, silver precipitating agents and materials which are useful in conjunction with these materials. Processes of forming microvessels and introducing materials therein are also disclosed. Processes of forming images are disclosed employing microvessel containing elements. Image transfer processes are disclosed for producing one or a combination of silver and multicolor subtractive primary images alone or in combination with multicolor additive primary images.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: December 7, 1982
    Assignee: Eastman Kodak Company
    Inventor: Keith E. Whitmore
  • Patent number: 4324853
    Abstract: A processing composition adapted for use in a silver diffusion transfer process which includes a saturated polyol containing at least 3 hydroxyl groups wherein each hydroxyl group is no more than 3 carbon atoms away from another hydroxyl group.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: April 13, 1982
    Assignee: Polaroid Corporation
    Inventor: Michael Berger
  • Patent number: 4299908
    Abstract: A method for forming a negative image comprising imagewise exposing a photographic material to provide exposed areas and unexposed areas, said material comprising, on a support, (1) an emulsion layer containing a light-sensitive silver halide, (2) unsensitized silver halide metallic salt grains which are more soluble in a developer than the light sensitive silver halide, and (3) nuclei for physical development, processing said material in the presence of a reducing agent and a solvent for said grains with said developer containing a substance which renders said grains less soluble by adsorbing thereto, said developer rendering said grains in said exposed areas and not in said unexposed areas soluble in said solvent, whereby metal ions are released and deposited on said nuclei.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: November 10, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noboru Ito, Eiichi Sakamoto, Mikio Kawasaki, Takashi Uchida
  • Patent number: 4288522
    Abstract: Receptor material adapted for use in a combined dye transfer and silver complex diffusion transfer process, comprising in order:(i) a support,(ii) a first hydrophilic colloid layer containing a cationic compound capable of mordanting an acid dye, and(iii) a transparent second hydrophilic colloid layer containing development nuclei for catalyzing the reduction therein of silver complex salts to silver and at least one organic compound having an anionic group linked to a carbon atom. The use of the receptor material for the production of a black-and-white silver image in combination with one or more dye images results in silver images of increased density.
    Type: Grant
    Filed: January 22, 1980
    Date of Patent: September 8, 1981
    Assignee: Agfa-Gevaert N.V.
    Inventors: Frans Carael, Daniel A. Claeys, Wilhelmus Janssens
  • Patent number: 4267255
    Abstract: A processing composition adapted for use in a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 repeating units of ethylene oxide per hydrophobe.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: May 12, 1981
    Assignee: Polaroid Corporation
    Inventor: Karl J. Schreiber
  • Patent number: 4259116
    Abstract: Noble metal silver precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a polymer with a Cr.sup.+3 /Sn.degree. complex. The invention is also directed to film units employing said nuclei.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 31, 1981
    Assignee: Polaroid Corporation
    Inventor: Kenneth G. Scott
  • Patent number: 4259114
    Abstract: Noble metal silver-precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a first polymer with a Sn.degree. colloid formed by the non-aqueous borohydride reduction of a tin salt in the presence of an organic solvent for the tin salt and a nitrogen-containing metal chelating polymer. The invention is also directed to film units employing said nuclei.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 31, 1981
    Assignee: Polaroid Corporation
    Inventors: Carl M. Berke, Barbara A. Baughman
  • Patent number: 4259115
    Abstract: Noble metal silver precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a polymer with a Sn.degree. suspension formed by the borohydride reduction of a tin salt. The invention is also directed to film units employing said nuclei.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 31, 1981
    Assignee: Polaroid Corporation
    Inventors: Raymond B. Hanselman, John J. Magenheimer, Kenneth G. Scott
  • Patent number: 4186015
    Abstract: A receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising gelatin, polyvinyl alcohol and noble metal silver-precipitating nuclei; wherein said nuclei are present in a level of from about 0.1-0.4 mgs/ft.sup.2, gelatin is present at a level of from about 0.05 to 1.5 mgs/ft.sup.2 and polyvinyl alcohol is present at a level of about 0.1 to 5 mgs/ft.sup.2. Preferably, the noble metal is palladium. The receiving element is particularly useful in an additive color diffusion transfer process.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: January 29, 1980
    Assignee: Polaroid Corporation
    Inventors: Edwin H. Land, Stanley M. Bloom