Silver Halide As Radiation Sensitive Medium Patents (Class 430/416)
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Patent number: 8034542Abstract: An electromagnetic shielding film for plasma display which is excellent in electromagnetic shielding characteristics for effectively shielding electromagnetic waves, near infrared rays, stray light, external light, and the like and even when stored under a wet heat condition, is small in change of color tint and good in adhesion, with a blackening layer hardly peeled away, is provided by a transparent electromagnetic shielding film including a transparent support having thereon a conductive metal layer in a pattern-like state having an electromagnetic shielding ability and having a surface covered by a blackening layer, with the blackening layer made of an alloy of nickel and zinc in a nickel/zinc mass ratio of from 0.5 to 50.Type: GrantFiled: March 28, 2007Date of Patent: October 11, 2011Assignee: FUJIFILM CorporationInventors: Hirotomo Sasaki, Jun Matsumoto, Takayasu Yamazaki, Akimitsu Haijima, Yoshihiro Fujita
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Publication number: 20040067456Abstract: A processing method has been provided for an exposed silver halide black-and-white negative working sound recording film element, said processing method comprising the steps of processing said sound recording film element in a processing apparatus providing processing ability in a daylight environment, said processing method comprising the steps of developing in a time of less than 20 seconds; fixing in a fixer; rinsing and drying; making use of an automatic processing machine, the mentioned processing steps being followed by a step of controlling black-and-white densitometry, therefor providing the processing machine with a densitometer; further recording in a motion picture color print film and processing therein image area frames originating from an exposed and processed color negative recording film and from (an) optical soundtrack(s) originating from a silver halide black-and-white negative working sound recording film element, wherein said film element has been processed, after having been exposed, by tType: ApplicationFiled: September 30, 2003Publication date: April 8, 2004Inventor: Jean Burtin
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Publication number: 20040058282Abstract: A method of processing, with a developer in which a solution physical development arises, a silver halide photosensitive material containing a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof which belongs to the following types 1 to 4:Type: ApplicationFiled: September 10, 2003Publication date: March 25, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Kimiyasu Mor imura, Kohzaburoh Yamada
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Patent number: 6649330Abstract: In accordance with one embodiment of the invention, a photographic element is described comprising a support bearing one or more hydrophilic colloid layers including at least one photographic silver halide emulsion layer, wherein sequestered silver ions are incorporated into at least one hydrophilic colloid layer in the form of a silver ion containing material which sequesters silver ions prior to photographic processing and releases silver ions upon exposure to photographic processing solutions. Method for preparing and processing such photographic element are also described. In accordance with particular embodiments of the invention, the silver ion containing material comprises a silver ion-exchanged zeolite material or an intercalation composition comprising a layered host material having silver ions inserted as guest ions between the layers of the host material.Type: GrantFiled: December 28, 2001Date of Patent: November 18, 2003Assignee: Eastman Kodak CompanyInventors: Joseph F. Bringley, Kenneth J. Lushington, Tiecheng A. Qiao, James S. Honan
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Publication number: 20030157445Abstract: In accordance with one embodiment of the invention, a photographic element is described comprising a support bearing one or more hydrophilic colloid layers including at least one photographic silver halide emulsion layer, wherein sequestered silver ions are incorporated into at least one hydrophilic colloid layer in the form of a silver ion containing material which sequesters silver ions prior to photographic processing and releases silver ions upon exposure to photographic processing solutions. Method for preparing and processing such photographic element are also described. In accordance with particular embodiments of the invention, the silver ion containing material comprises a silver ion-exchanged zeolite material or an intercalation composition comprising a layered host material having silver ions inserted as guest ions between the layers of the host material.Type: ApplicationFiled: December 28, 2001Publication date: August 21, 2003Inventors: Joseph F. Bringley, Kenneth J. Lushington, Tiecheng A. Qiao, James S. Honan
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Patent number: 6262697Abstract: A display for presenting selected images to a viewer is disclosed, including a transparent substrate, a transparent, electrically conductive coating formed over the transparent substrate, a light modulating layer formed over the transparent, electrically conductive layer and a photosensitive layer formed over the light modulating layer which is adapted to be exposed and developed to provide viewable and conductive images.Type: GrantFiled: March 20, 1998Date of Patent: July 17, 2001Assignee: Eastman Kodak CompanyInventor: Stanley W. Stephenson
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Patent number: 6057164Abstract: The method for the aptitude testing of protein fractions containing factor VIII the further processing of which comprises a pasteurizing step is performed in such a way that the starting material is examined for fragments within a range of from 20 to 50 kD. Fragments of factor VIII within this range evidently cause inhibitor formations in patients pretreated with factor VIII. Batches contaminated with such fragments can also be utilized, i.e., for the preparation of a high purity virus-free factor VIII by size exclusion chromatography on hydrophilic materials.Type: GrantFiled: January 7, 1999Date of Patent: May 2, 2000Assignee: Octapharma AGInventors: Andrea Buchacher, Monika Stadler, DJuro Josic
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Patent number: 5985509Abstract: A high contrast photographic material comprises a support bearing a silver halide emulsion layer. This material is free from nucleating agents and has a silver:gelatin ratio greater than 1. The emulsion layer comprises silver halide grains that are spectrally sensitized. Moreover, the material contains a density enhancing amine compound in the emulsion layer or in an adjacent hydrophilic colloid layer. The spectrally sensitized silver halide grains comprise one grain population sensitized to radiation of a particular wavelength region, and one or more additional grain populations sensitized to radiation of a different wavelength region.Type: GrantFiled: December 18, 1997Date of Patent: November 16, 1999Assignee: Eastman Kodak CompanyInventors: Allison Hazel C. Dale, Roger H. Piggin
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Patent number: 5916734Abstract: Provided is a method for making a lithographic printing plate according to which the area of a silver thin film of non-image area of a lithographic printing plate material comprising a support, at least a hydrophilic layer on the support and a silver thin film on the hydrophilic layer is exposed by laser beams to be fused and/or decomposed by heat transformed from laser energy thereby to disclose the hydrophilic layer.Type: GrantFiled: November 4, 1997Date of Patent: June 29, 1999Assignee: Mitsubishi Paper Mills LimitedInventors: Yuji Takagami, Hideaki Ishiguro, Kenji Hyodo
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Patent number: 5902719Abstract: Disclosed is a process for processing a lithographic printing plate having a physical development nuclei layer between an aluminum support and a silver halide emulsion layer, which comprises processing the lithographic printing plate in the presence of a monocyclic azole compound having no mercapto group or a derivative thereof.Type: GrantFiled: October 14, 1997Date of Patent: May 11, 1999Assignee: Mitsubishi Paper Mills LimitedInventors: Hideaki Baba, Makiko Oko, Toshiro Kondo
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Patent number: 5736295Abstract: A density enhancing amine compound is incorporated into a silver halide element containing both spectrally sensitized and non-spectrally sensitized silver halide grains in the emulsion layer.Type: GrantFiled: August 8, 1996Date of Patent: April 7, 1998Assignee: Eastman Kodak CompanyInventors: Allison Hazel Caroline Dale, Roger Hugh Piggin
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Patent number: 5686232Abstract: A novel inorganic composition for developing silver halide photographic products has improved stability in air. The composition comprises at least one oxidizable metallic ion, ethylenediamine tetraacetic acid and at least one additional complexing agent of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are each independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, a hydroxyl group, or a hydroxyalkyl group, R.sup.3 is --COOM wherein M is hydrogen or a counter-ion such as lithium, sodium or potassium, or --CONR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are each independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, and n, p and q are independently 1, 2 or 3.Type: GrantFiled: January 23, 1997Date of Patent: November 11, 1997Assignee: Eastman Kodak CompanyInventors: Jacques Roussilhe, Claude Germain Goumont
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Patent number: 5660972Abstract: Disclosed is a method for developing silver halide photographic photosensitive materials with a developer containing a sulfite wherein said developer contains 20 mol % or more of potassium ion based on the total alkali metal ions, 0.04 mol/l or more of bromine ion or a compound represented by the following formula (I): ##STR1## wherein R.sub.1 represents a hydroxyalkyl group having 2-10 carbon atoms and R.sub.2 and R.sub.3 each represent a hydrogen atom, an alkyl group having 1-10 carbon atoms or a hydroxyalkyl group having 2-10 carbon atoms and the developer is filtered by a filter containing physical development nuclei before, during or after development of the photosensitive materials with the developer. The method is especially effective in processing using an automatic processor. According to the present method, formation of silver sludges is effectively inhibited and thus, stain of roll and belt of the processors can be prevented.Type: GrantFiled: March 14, 1995Date of Patent: August 26, 1997Assignee: Mitsubishi Paper Mills LimitedInventors: Hideto Kiyama, Tamotu Iwata, Yukinao Kawamata, Susumu Baba
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Patent number: 5656415Abstract: A novel inorganic composition for developing silver halide photographic products has improved stability in air. The composition comprises at least one oxidizable metallic ion, ethylenediamine tetraacetic acid and at least one additional complexing agent of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are each independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, a hydroxyl group, or a hydroxyalkyl group, R.sup.3 is --COOM wherein M is hydrogen or a counter-ion such as lithium, sodium or potassium, or --CONR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are each independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, and n, p and q are independently 1, 2 or 3.Type: GrantFiled: March 1, 1996Date of Patent: August 12, 1997Assignee: Eastman Kodak CompanyInventors: Jacques Roussilhe, Claude Germain Goumont
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Patent number: 5645971Abstract: The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei and developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid characterized in that said development is carried out in the presence of a meso-ionic compound. The present invention further provides an imaging element and alkaline processing liquid for use in said method.Type: GrantFiled: June 20, 1996Date of Patent: July 8, 1997Assignee: Agfa-Gevaert, N.V.Inventors: Ludo Van Rompuy, Rene De Keyzer, Jean-Marie Dewanckele, Marcel Monbaliu, Jos Vaes
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Patent number: 5576265Abstract: A method for preparing a color filter array element is diclosed which includes the steps of forming an assembly by providing a support on which is coated a polymeric dye image-receiving layer; a stencil pattern on the dye image-receiving layer with holes corresponding to the desired color pixel array pattern; and a dye donor sheet over the stencil. The dye donor has a support film overcoated with a mixture of color dye, polymeric binder, and light absorber. The method further includes exposing the assembly to high intensity light to briefly heat the dye layer and thereby transfer the dye from the donor to the polymeric dye receiving layer so that a colored pattern of pixel elements are formed in or on the image-receiving layer.Type: GrantFiled: April 26, 1995Date of Patent: November 19, 1996Assignee: Eastman Kodak CompanyInventors: Charles DeBoer, Michael E. Long, Judith L. Fleissig, Kathleen S. Hollis, John R. Debesis
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Patent number: 5288604Abstract: A silver halide photographic material is disclosed, comprising at least one sensitizing dye represented by formula (I): ##STR1## wherein V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5 and V.sub.6 each represents a substituent with the total of the Hammett's constants of all the substituents being less than -0.27, R.sub.1 and R.sub.2 each represents an alkyl group, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6 and L.sub.7 each represents a methine group, m represents 0 or 1, Z represents an atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing hetero ring, X.sub.n represents a charge balancing counter ion(s), n has a value of at least 0 which is necessary for neutralizing the charge of the compound. The material has a high sensitivity to infrared rays and gives an image of high quality with little remaining color. Also disclosed is a method for processing such a silver halide photographic material.Type: GrantFiled: April 30, 1992Date of Patent: February 22, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuji Mihara, Takashi Kato, Takanori Hioki
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Patent number: 5283156Abstract: The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei and developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid characterized in that said development is carried out in the presence of a regulator according to one of the formulas as specified in the claims. The present invention further provides an imaging element and alkaline processing liquid for use in said method.Type: GrantFiled: December 4, 1992Date of Patent: February 1, 1994Assignee: Agfa-Gevaert, N.V.Inventors: Marcel Monbaliu, Rene De Keyzer, Jean-Marie Dewanckele, Jos Vaes, Ludo Van Rompuy
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Patent number: 5262271Abstract: According to the present invention a method for producing a negative image is provided, comprising the following steps:image-wise exposing an imaging element comprising on a support, a light-sensitive silver halide emulsion layer comprising silver halide grains having an average volume of not more than 0.02 .mu.m.sup.3 and a layer containing non-light-sensitive water insoluble silver salt, to produce a latent image in said layer of light-sensitive silver halidedeveloping said latent image to produce physical development nuclei of silverdissolving the non-light-sensitive silver salts using a silver salt complexing agent andallowing the thus formed silver salt complexes to diffuse to the layer containing said image-wise formed physical development nuclei of silver to image-wise deposit and develop said silver salt complexes on said image-wise formed physical development nuclei of silver in the presence of (a) developing agent(s).Type: GrantFiled: October 10, 1991Date of Patent: November 16, 1993Assignee: AGFA-Gevaert, N.V.Inventors: Jean-Pierre D. Tahon, Wilhelmus Janssens
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Patent number: 5229232Abstract: A thermal printing system is disclosed in which various patterned masks are used in conjunction with an electronic light flash and other related hardware to thermally transfer dyes to a receiver in such a way as to create a color filter array with an incorporated black matrix for use in a color liquid crystal display device.Type: GrantFiled: August 5, 1991Date of Patent: July 20, 1993Assignee: Eastman Kodak CompanyInventors: Carmen J. Longobardi, Helmut Weber, Michael E. Long
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Patent number: 5147767Abstract: 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 2-keto gluconic acid and derivatives thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrzaolidone developer compound.Type: GrantFiled: April 10, 1991Date of Patent: September 15, 1992Inventor: Audenried W. Knapp
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Patent number: 4693955Abstract: Disclosed is a light-sensitive photographic element for negative type lithographic printing plates high in sensitivity and contrast which comprises a support having thereon a light-sensitive silver halide, a metal salt particle having substantially no light-sensitivity, a compound which reacts with an oxidized developing agent produced by development to release a compond which acts as a solvent or a solution physical development accelerator for said metal salt particle and physical development nuclei.Type: GrantFiled: March 18, 1985Date of Patent: September 15, 1987Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Koichi Torizuka, Kiyoshi Futaki
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Patent number: 4569903Abstract: A recording medium for reflective readout in an optical information recording system. The medium comprises a substrate such as PET or PMMA on emulsion layer of silver halide material and an optical protective layer. The emulsion is exposed to a laser source to form a latent data image and is then developed to exhibit a glossy silver metallic image. Playback uses established systems.Type: GrantFiled: October 25, 1984Date of Patent: February 11, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Masakazu Hashiue, Koji Ochiai
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Patent number: 4530898Abstract: Photographic film units and processes are disclosed which provide a negative image, wherein exposed silver is developed to high covering power silver and unexposed silver halide is reduced to low covering power silver.Type: GrantFiled: February 29, 1984Date of Patent: July 23, 1985Assignee: Polaroid CorporationInventor: Arnold Spiegal
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Patent number: 4500631Abstract: A radiographic image forming process comprising imagewise exposing a negative type silver halide light-sensitive photographic material in combination with a fluorescent intensifying screen to radiation and then treating said material with a processing solution, said material comprising a support and constituent layers coated on both sides of said support, said layers containing(a) light sensitive silver halide particles,(b) metallic salt particles which are not light-sensitive and, when untreated, are more soluble in said processing solution than said silver halide particles, said metallic salt particles having been treated so that the surface thereof has been rendered less soluble than said silver halide by a dissolution retarder,(c) physical development nuclei, and(d) compounds selected from water soluble dyes having absorption maxima in an aqueous solution of from 400 to 600 nm or compounds selected from said water soluble dyes coupled to a non-diffusive mordant, andsaid processing solution containing at lType: GrantFiled: August 5, 1983Date of Patent: February 19, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Eiichi Sakamoto, Mikio Kawasaki, Kouji Ono, Kakujulo Fukuoji, Noboru Fujimori
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Patent number: 4401739Abstract: Printing characteristics such as ink receptivity and printing endurance of a lithographic printing plate which utilizes as ink receptive areas the photographically formed silver or silver halide image can be improved by treating said printing plate in the presence of a polymer compound containing in its principal and/or side chain an aromatic nucleus bearing a hydrophilic substituent group, said printing plate containing in at least one of its constitutive layers as hydrophilic high molecular weight-binder.Type: GrantFiled: April 2, 1982Date of Patent: August 30, 1983Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Takao Senga, Masafumi Koishi, Yasuo Tsubai
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Patent number: 4400462Abstract: 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: GrantFiled: June 1, 1981Date of Patent: August 23, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kouzi Ono, Mikio Kawasaki, Mariko Natori, Eiichi Sakamoto
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Patent number: 4371608Abstract: A chalcogenide such as As.sub.2 S.sub.3 is coated on a substrate at a very low rate of deposition in a vacuum evaporator and is coated with a thin silver layer. The silver coated layer is exposed to illumination in a quantity insufficient to form an etchable layer by conventional techniques and the silver is increased by treatment with a silver-containing agent capable of depositing silver on the image, preferably in the presence of radiation. NaAgSO.sub.3 is a presently preferred agent. The resulting image-bearing layer is photo-doped by exposure to band-gap radiation and the member is then etched.Type: GrantFiled: June 22, 1981Date of Patent: February 1, 1983Assignee: Ionomet CompanyInventor: Amitabha Das
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Patent number: 4366235Abstract: A photosensitive element comprising a support carrying photosensitive silver halide grains in a substantially predetermined spaced array and methods for forming such photosensitive elements.Type: GrantFiled: February 17, 1981Date of Patent: December 28, 1982Assignee: Polaroid CorporationInventor: Edwin H. Land
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Patent number: 4363870Abstract: A method for making a laser recording and data storage medium by first exposing a Lippman emulsion to light in order to form a depthwise nuclei gradient, then physically developing the emulsion until a reflective surface layer of spheroid silver particles, having the desired degree of reflectivity, is attained and then chemically developing the remaining nuclei to form a dark underlayer of filamentary silver particles.Type: GrantFiled: September 11, 1981Date of Patent: December 14, 1982Assignee: Drexler Technology CorporationInventor: Eric W. Bouldin
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Patent number: 4343879Abstract: A laser recording medium consisting of shiny silver particles in a colloid matrix having at least one superposed layer of colloid matrix containing dispersed metal particles other than silver to lower the reflectivity of the medium.Type: GrantFiled: August 22, 1980Date of Patent: August 10, 1982Assignee: Drexler Technology CorporationInventors: Jerome Drexler, Eric W. Bouldin
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Patent number: 4312938Abstract: A broadband laser recording and data storage medium for direct read after writing, formed from a photosensitive silver-halide emulsion in four steps. First, a non-saturating actinic radiation exposure is used to create latent images. A normal photographic development is used to produce a medium of gray neutral density. The surface of the remaining silver halide is fogged in a water or alcohol based solution to create a very thin layer of silver precipitating nuclei on the surface. Finally, a single-step, negative silver diffusion transfer process is used to dissolve the unexposed and undeveloped silver halide, forming silver ion complexes.Type: GrantFiled: October 17, 1980Date of Patent: January 26, 1982Assignee: Drexler Technology CorporationInventors: Jerome Drexler, Eric W. Bouldin
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Patent number: 4304848Abstract: A method of replicating data from a master transmissive optical data storage medium whereby the resulting product displays areas of low reflectivity and high reflectivity. Actinic radiation is shone through transmissive areas onto a silver-halide emulsion photosensitive medium. The photosensitive medium is then chemically developed black. Next, the developed medium is fogged to create a latent image layer of silver precipitating nuclei. Finally, the fogged medium is placed in a monobath comprising a weak silver-halide reducing agent and a rapid-acting silver-halide solvent for partial chemical development and substantial physical development. The resulting product displays areas of low reflectivity, which correspond to the transmissive areas of the master, in a reflective field.Type: GrantFiled: June 4, 1980Date of Patent: December 8, 1981Assignee: Drexler Technology CorporationInventors: Eric W. Bouldin, Jerome Drexler
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Patent number: 4284716Abstract: A broadband laser recording and data storage medium for direct read after writing, formed from a photosensitive silver-halide emulsion in four steps. First, a non-saturating actinic radiation exposure is used to create latent images. A normal photographic development is used to produce a medium of gray neutral density. The surface of the remaining silver halide is fogged in a water or alcohol based solution to create a very thin layer of silver precipitating nuclei on the surface. Finally, a single-step, negative silver diffusion transfer process is used to dissolve the unexposed and undeveloped silver halide, forming silver ion complexes.Type: GrantFiled: April 14, 1980Date of Patent: August 18, 1981Assignee: Drexler Technology CorporationInventors: Jerome Drexler, Eric W. Bouldin
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Patent number: 4278756Abstract: A reflective laser recording and data storage medium, for direct reading after writing, formed from a photosensitive silver-halide emulsion wherein a surface latent image exposure on the recording area forms a depthwise gradient of silver nuclei. A single step negative silver diffusion transfer process is used to develop silver nuclei of the latent image and dissolve unexposed silver halide elsewhere, forming silver ion complexes. These complexes are transported by diffusion transfer to the developing silver nuclei sites where silver is precipitated and adsorbed to form a high concentration of non-filamentary particles at a surface of a low melting temperature dielectric matrix which is highly reflective of light and electrically non-conducting.Type: GrantFiled: July 6, 1979Date of Patent: July 14, 1981Assignee: Drexler Technology CorporationInventors: Eric W. Bouldin, Jerome Drexler
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Patent number: 4278758Abstract: A method for making a reflective data storage medium by creating a volume concentration gradient of silver precipitating nuclei on one surface of a silver halide emulsion coated photoplate. This volume concentration is then built up by a silver diffusion transfer negative development using primarily solution physical development until the surface becomes reflective. Lastly, a thermal annealing step is used to increase reflectivity, recording sensitivity and produce a more uniform contrast ratio.Type: GrantFiled: September 6, 1979Date of Patent: July 14, 1981Assignee: Drexler Technology CorporationInventors: Jerome Drexler, Eric W. Bouldin
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Patent number: 4269917Abstract: A reflective laser recording and data storage medium, for direct reading after writing, formed from a photosensitive silver-halide emulsion wherein a surface latent image exposure on the recording area forms a depthwise gradient of silver nuclei. A single step negative silver diffusion transfer process is used to develop silver nuclei of the latent image and dissolve unexposed silver halide elsewhere, forming silver ion complexes. These complexes are transported by diffusion transfer to the developing silver nuclei sites where silver is precipitated and adsorbed to form a high concentration of non-filamentary particles at a surface of a low melting temperature dielectric colloid matrix which is highly reflective of light and electrically non-conducting.Type: GrantFiled: July 14, 1980Date of Patent: May 26, 1981Assignee: Drexler Technology CorporationInventors: Jerome Drexler, Eric W. Bouldin
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Patent number: 4254214Abstract: A photographic material for recording non-silver images at high sensitivity using a small amount of silver halide, comprising a support, a layer, formed thereon, of a monovalent or divalent copper salt or complex and a hydrophilic binder, and a layer of silver halide formed on the layer containing the copper salt or complex either by vacuum-deposition or sputtering, or by coating a silver halide emulsion. Non-silver images are formed by exposing the photographic material imagewise, and developing the silver halide layer and the copper compound layer either successively with different developer solutions, or continuously in one developer solution. The silver developed acts as a catalyst for the development of the copper compound.Type: GrantFiled: May 30, 1978Date of Patent: March 3, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Keizi Takeda, Kenji Matsumoto, Masayoshi Nagata
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Patent number: 4251623Abstract: Tellurium images are formed by the decomposition of tellurium (II) coordination complexes in the presence of a catalyst. The complexes are characterized in that at least one of the four coordination positions of the tellurium (II) is occupied by a sulfur containing ligand. Preferred ligands that can be coordinated with tellurium are sulfur containing bidentate anionic ligands. Complexes formed using these preferred ligands are more hydrolytically stable than other tellurium (II) complexes having sulfur containing ligands and yet are still capable of providing catalytic amplification.Type: GrantFiled: June 21, 1979Date of Patent: February 17, 1981Assignee: Eastman Kodak CompanyInventor: Henry J. Gysling