And Electric Field Separation Apparatus Patents (Class 96/3)
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Patent number: 4076529Abstract: Color photographic elements, compositions, diffusion transfer film units and processes are described which employ a nondiffusible p-sulfonamidoaniline or p-sulfonamidophenol which is preferably alkali-cleavable upon oxidation to release a diffusible color-providing moiety.Type: GrantFiled: April 16, 1973Date of Patent: February 28, 1978Assignee: Eastman Kodak CompanyInventors: Lee J. Fleckenstein, John Figueras
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Patent number: 4071366Abstract: Improved diffusion transfer photographic products and processes wherein a distinctive image-receiving sheet comprising a plurality of layers one of which comprises a polymeric material providing quaternary nitrogen groups is integrated with an integral negative-position diffusion transfer film unit.Type: GrantFiled: July 9, 1976Date of Patent: January 31, 1978Assignee: Polaroid CorporationInventors: Gerard J. Bourgeois, Ronald A. Sahatjian
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Patent number: 4069048Abstract: In a diffusion transfer color photographic material including a photosensitive element comprising silver halide emulsion layers having associated therewith dye image forming materials, an image receiving element, and a liquid processing composition for developing the silver halide emulsion layers after image-wise exposure and diffusing the dye images formed into the image receiving element, the dye images formed are stabilized and the formation of stains at blank areas is effectively prevented by incorporating one or more N-.alpha.-sulfoalkylated amino acids into at least one of the photosensitive element, the image receiving element or the liquid processing composition. A process using the same is also disclosed.Type: GrantFiled: February 17, 1976Date of Patent: January 17, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Motohiko Tsubota, Sosuke Hanai, Yasushi Oishi, Hidefumi Sera, Nobuo Yamamoto
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Patent number: 4066457Abstract: A diffusion transfer photographic element containing a lipophilic, non-diffusing color former in a silver halide emulsion layer, or in a layer adjacent thereto, is developed by using a water- and alkali-soluble color developer capable of coupling with the color former to form a diffusible coupled product, the color developer being coated with the silver halide emulsion layer or in any layer of the photographic element or being in an alkaline developing solution.Type: GrantFiled: December 10, 1974Date of Patent: January 3, 1978Assignee: GAF CorporationInventors: Theodore Panasik, Felix Viro, Burton H. Waxman, Robert T. Shannahan
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Patent number: 4066456Abstract: A derivative of paraphenylenediamine, for use as a color developer, having a primary amino group available for oxidative coupling, and a carboxy group bound to the benzene ring to provide the compound with the required stability to enable the compound to be incorporated into a photographic film, the compound being non-diffusible during development of the photographic film in an alkaline processing solution.Type: GrantFiled: December 10, 1974Date of Patent: January 3, 1978Assignee: GAF CorporationInventors: Burton H. Waxman, Michael C. Mourning, Theodore Panasik
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Patent number: 4063950Abstract: A light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.Type: GrantFiled: June 23, 1975Date of Patent: December 20, 1977Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Takaya Endo, Shoji Kikuchi, Ryosuke Satoh
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Patent number: 4061496Abstract: A temporary barrier between reactants in photographic products and especially for color diffusion transfer film units comprises two contiguous layers, one layer comprising a polymeric timing layer and having an activation energy of penetration of the layer by an aqueous alkaline solution of less than 18 kcal/mole and the second layer comprising a coalesced or partially coalesced polymeric latex and having an activation energy for the process of penetration of the layer by an aqueous alkaline solution of greater than 18 kcal/mole.Type: GrantFiled: April 14, 1976Date of Patent: December 6, 1977Assignee: Eastman Kodak CompanyInventors: David Eugene Hannie, Gerald Louis Ducharme
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Patent number: 4061497Abstract: An imaging system and process wherein an element comprising a cobalt complex-developer redox system is catalyzed by cobalt sulfide. The cobalt sulfide can be imagewise produced by exposing a photoreducible cobalt complex in the presence of a thioamide, or it can be uniformly distributed and either masked in an imagewise fashion, or reacted with imagewise distributed color developing agent.Type: GrantFiled: July 14, 1975Date of Patent: December 6, 1977Assignee: Eastman Kodak CompanyInventors: Glenn R. Wilkes, Albert T. Brault
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Patent number: 4060417Abstract: A silver ion scavenger layer is employed between adjacent silver halide strata to enhance color separation in multicolor photographic images prepared by processes which utilize the imagewise distribution of silver ions and/or soluble silver complex made available during development to liberate a corresponding imagewise distribution of dye or dye intermediate from a color-providing compound.Type: GrantFiled: May 5, 1975Date of Patent: November 29, 1977Assignee: Polaroid CorporationInventors: Ronald F. W. Cieciuch, Roberta R. Luhowy, Frank A. Meneghini, Howard G. Rogers
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Patent number: 4060418Abstract: Compounds of the formula: ##STR1## wherein R is halogen or trifluoromethyl, n is 0 to 5, and CD is the residue of a paraphenylenediamine color developer having a primary amino group available for oxidative coupling, the phenoxycarbonyl group being attached to the primary nitrogen atom of the paraphenylenediamine color developer, are used in a receiving sheet of a diffusion transfer photographic element for coupling with a color former to form a stable dye.Type: GrantFiled: February 13, 1976Date of Patent: November 29, 1977Assignee: GAF CorporationInventors: Burton H. Waxman, Michael C. Mourning
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Patent number: 4057425Abstract: This application is concerned with dye developer diffusion transfer color processes and discloses the incorporation of certain 2-substituted benzimidazoles, e.g., 2-phenyl-benzimidazole, in a dye developer photosensitive element to provide improved temperature latitude.Type: GrantFiled: July 16, 1975Date of Patent: November 8, 1977Assignee: Polaroid CorporationInventors: Ronald F. Lambert, Howard G. Rogers
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Patent number: 4056394Abstract: A temporary barrier between reactants in photographic products and especially for color diffusion transfer film unit comprises a polymeric layer of at least partially coalesced latex, said layer having an activation energy of penetration by an aqueous alkaline solution of greater than 18 kcal/mole.Type: GrantFiled: April 14, 1976Date of Patent: November 1, 1977Assignee: Eastman Kodak CompanyInventor: David Eugene Hannie
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Patent number: 4056392Abstract: This invention is directed to an additive color diffusion transfer film unit which comprises, in order, an additive multicolor screen, a silver precipitating layer, a layer of chitin having a copper salt disposed therein, and a photosensitive silver halide layer.Type: GrantFiled: June 17, 1976Date of Patent: November 1, 1977Assignee: Polaroid CorporationInventor: Kenneth G. Scott
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Patent number: 4056539Abstract: This invention relates to indole (na) phthalide indicator dyes substituted with a particular class of hydrogen bonding groups, such as, perhaloalkyl carbinols. These dyes are useful as optical filter agents in photographic processes to protect a selectivity exposed photosensitive material from further exposure during processing in the presence of incident light.Type: GrantFiled: March 22, 1976Date of Patent: November 1, 1977Assignee: Polaroid CorporationInventor: Richard B. Greenwald
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Patent number: 4055428Abstract: A color photographic material for, in particular, a color diffusion transfer process having at least one silver halide emulsion layer having associated therewith a dye releasing redox compound shown by the formula ##STR1## wherein G represents a hydroxyl group or a group yielding a hydroxyl group by hydrolysis, Col represents a dye or a group yielding a dye by hydrolysis, R represents an alkyl group or an aromatic group, X represents a substituent comprising an electron donating group or substituents, which may be same or different, at least one of which comprises an electron donating group, and n is 1, 2, or 3, where X moieties may form a condensed ring (excluding an aromatic hydrocarbon ring) with each other or with OR, wherein the total carbon number of Xn and R is more than 8.Type: GrantFiled: March 26, 1976Date of Patent: October 25, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Koyama, Yukio Maekawa, Masami Miyakawa
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Patent number: 4054722Abstract: A material for a color diffusion transfer photographic process, which possesses neutralizing means comprising the combination of a layer containing a polymer having a repeating unit represented by the following general formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom, an aliphatic hydrocarbon residue having 1 to 6 carbon atoms or an aryl group, and X represents an n+1 valent aliphatic hydrocarbon residue having 2 to 8 carbon atoms or an n+1 valent residue of the formula --A-O--.sub.m A, wherein A represents an aliphatic hydrocarbon residue having 2 to 4 carbon atoms, and m and n each represents an integer of 1 to 5, and an acidic polymer layer.Type: GrantFiled: June 23, 1976Date of Patent: October 18, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Yoshida, Shinji Sakaguchi
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Patent number: 4053312Abstract: Color photographic elements, diffusion transfer film units and processes are described which employ nondiffusible o-sulfonamidonaphthols which are alkali-cleavable upon oxidation to release a diffusible color-providing moiety.Type: GrantFiled: September 4, 1974Date of Patent: October 11, 1977Assignee: Eastman Kodak CompanyInventor: Lee J. Fleckenstein
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Patent number: 4052214Abstract: A color photographic light-sensitive material, which comprises a transparent support having thereon at least one emulsion layer unit containing the following three layers and capable of simultaneously providing, as a result of exposure and development, both a diffusible dye with a positive image distribution and a non-diffusible dye with a negative image distribution:1. a hydrophilic colloidal layer containing a ballasted coupler capable of reacting with an oxidation product of an aromatic primary amine color developing agent to form a diffusible dye, and a spontaneously developable, slightly soluble silver salt dispersion,2. a first negative type light-sensitive silver halide emulsion layer provided adjacent the colloidal layer (1) and containing a ballasted compound capable of reacting with an oxidation product of an aromatic primary amine color developing agent to release a diffusible development inhibitor inhibiting the development of the silver salt in the above-described colloidal layer (1), and3.Type: GrantFiled: August 26, 1975Date of Patent: October 4, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasushi Oishi, Yoshinobu Yoshida
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Patent number: 4047953Abstract: The use of a 4-thiohydantoine in combination with an image-wise exposed diffusion transfer element comprising a negative silver halide emulsion layer and an associated physical development layer containing cadmium sulfide nuclei and an associated initially immobile dye-providing substance provides improved diffusion transfer dye images.Type: GrantFiled: April 28, 1976Date of Patent: September 13, 1977Assignee: Eastman Kodak CompanyInventor: Maurice Edgar Pfaff
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Patent number: 4047952Abstract: The use of a soluble, reducible silver salt in combination with an imagewise exposed diffusion transfer photographic element comprising a negative silver halide emulsion and an associated physical development nuclei layer provides a resultant photographic image having intensified maximum density areas with little or no effect on minimum density areas.Type: GrantFiled: April 28, 1976Date of Patent: September 13, 1977Assignee: Eastman Kodak CompanyInventor: Maurice Edgar Pfaff
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Patent number: 4046574Abstract: A color photographic material having a silver halide emulsion layer and containing a thioether compound which is reactable on chromogenic development thereby releasing a diffusible substance which inhibits the development of the silver halide.The thioether compound is a homophthalimide containing a removable mercapto group containing moiety in the 4-position and its nitrogen in the 2-position atom being a tertiary nitrogen.Type: GrantFiled: January 20, 1976Date of Patent: September 6, 1977Assignee: AGFA-Gevaert, AktiengesellschaftInventors: Heinrich Odenwalder, Erwin Ranz, Walter Puschel, Hans Vetter
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Patent number: 4040830Abstract: Integral negative-positive diffusion transfer reflection prints are provided with a non-planar, e.g., lenticular, surface through which the transfer image is viewed.Type: GrantFiled: August 27, 1975Date of Patent: August 9, 1977Assignee: Polaroid CorporationInventor: Howard G. Rogers
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Patent number: 4038082Abstract: An image-receiving element for color diffusion transfer photography for use with a photographic element containing at least one silver halide emulsion layer having incorporated therein a dye image forming material that is soluble in alkaline solution and becomes diffusible upon development of the silver halide emulsion layer with an alkaline processing solution, and to which the dye image forming material is imagewise transferred when the alkaline processing solution is spread between the image-receiving element and the photographic element; in which the image-receiving element comprises a support having at least one hydrophilic colloid layer thereon, at least one layer of the image-receiving element containing an alkaline solution-soluble hydrophilic synthetic polymer and a polymethylol compound.Type: GrantFiled: August 30, 1974Date of Patent: July 26, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Yoshida, Nobuo Yamamoto
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Patent number: 4036643Abstract: Lipophilic non-diffusing color formers yielding diffusing dyes are employed in color transfer systems to provide improved diffusion and better quality of color. The color formers are two-equivalent couplers having in the coupling position acyloxy, or sulfonyloxy groups which complete a lactone or sultone ring, respectively, and are stable to hydrolysis under alkaline development conditions. Color-providing material is created by a reaction which opens the lactone or sultone intramolecular ring after the non-diffusing color former reacts with the oxidized color developer molecule. Examples are given of intramolecular 2-equivalent couplers which react with the developer to give yellow, magenta and cyan dyes. The 2-equivalent color formers are unique since they have an intramolecular lactone or sultone ring which opens under oxidative coupling conditions to yield the diffusible yellow, magenta and cyan dyes.Type: GrantFiled: November 1, 1974Date of Patent: July 19, 1977Assignee: GAF CorporationInventors: Felix Viro, Michael C. Mourning
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Patent number: 4033770Abstract: Process and material for the production and use of pressure sensitive and for heat sensitive and/or solvent sensitive decalcomanias, formed according to the principles of the silver complex diffusion transfer process.Type: GrantFiled: April 4, 1975Date of Patent: July 5, 1977Assignee: AGFA-GEVAERT N.V.Inventors: Louis Maria De Haes, Leon Louis Vermeulen, Hugo Karel Gevers, Walter Frans De Winter
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Patent number: 4032349Abstract: A color diffusion transfer photographic material which comprises: (a) a light-sensitive element containing at least one silver halide emulsion layer having a dye image-providing material associated therewith; (b) an image-receiving element capable of imagewise fixing the dye image-providing material as a result of exposure and development of the silver halide emulsion layer; and (c) a processing composition capable of causing development of the silver halide emulsion layer and containing a mercapto compound having a molecular weight of about 230 or higher; with at least one of the light-sensitive element, the image-receiving element and the processing composition containing a developing agent for the silver halide.Type: GrantFiled: June 25, 1975Date of Patent: June 28, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiki Sakanoue, Motohiko Tsubota, Yoshiharu Fuseya, Keiichi Adachi, Tadao Shishido
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Patent number: 4030920Abstract: Improved dye densities are obtained in color image transfer assemblages employing internal image emulsions, ballasted redox dye releasers and an alkaline processing composition containing a saturated, aliphatic or alicyclic glycol having from 3 to 10 carbon atoms or a saturated, aliphatic or alicyclic amino alcohol having from 2 to 10 carbon atoms.Type: GrantFiled: April 12, 1976Date of Patent: June 21, 1977Assignee: Eastman Kodak CompanyInventors: Arthur David Kuh, Paul Brainard Condit
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Patent number: 4030925Abstract: A radiation-sensitive composition is disclosed including silver halide grains capable of forming an internal latent image and an acylhydrazinophenylthiourea nucleating agent. This composition can be used as a coating on a support to form a photographic element.Type: GrantFiled: June 29, 1976Date of Patent: June 21, 1977Assignee: Eastman Kodak CompanyInventors: Ronald E. Leone, Wayne W. Weber, II, Donald P. Wrathall
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Patent number: 4029503Abstract: A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.Type: GrantFiled: May 7, 1975Date of Patent: June 14, 1977Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Ryosuke Sato
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Photographic image transfer elements containing neutralizing layers comprising particulate materials
Patent number: 4029504Abstract: A neutralizing layer containing particulate diatomaceous earth, exploded volcanic rock or hydrous calcium silicate is described for use in color diffusion transfer film units, dye image-receiving elements and cover sheets.Type: GrantFiled: April 14, 1976Date of Patent: June 14, 1977Assignee: Eastman Kodak CompanyInventors: George Richard Secrist, Richard Warren Berls, Brooke Pershing Schlegel -
Patent number: 4029849Abstract: Timing layer for color diffusion transfer assemblages comprises a mixture of cellulose acetate and a maleic anhydride copolymer with 2 to 20% by weight of the mixture being said copolymer.Type: GrantFiled: September 7, 1976Date of Patent: June 14, 1977Assignee: Eastman Kodak CompanyInventor: Edward P. Abel
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Patent number: 4028103Abstract: Improvements in the physical characteristics of a photographic assemblage, especially an integral transfer element, are obtained by employing an alkali metal salt in the alkaline processing composition used to process the assemblage. The anion of the salt has a solubility in relation to that of sulfate such that after processing in the presence of calcium and sulfate ions, calcium will combine with said anion in preference to sulfate at any given pH. Especially preferred salts are alkali metal fluorides or oxalates.Type: GrantFiled: April 12, 1976Date of Patent: June 7, 1977Assignee: Eastman Kodak CompanyInventor: David Eugene Hannie
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Patent number: 4025343Abstract: Novel image-receiving elements for obtaining photographic images in silver which comprise a support carrying, as a silver precipitating layer, a layer of inorganic stannic oxide polymer (tin hydrosol) having a noble metal reduced thereon.Type: GrantFiled: January 14, 1976Date of Patent: May 24, 1977Assignee: Polaroid CorporationInventor: Boris Levy
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Patent number: 4025682Abstract: Integral negative-positive patterns viewable without separation of the negative-positive components. Essential elements of such film units comprise a photosensitive system which after exposure and processing can provide a diffusion transfer image pattern, an image pattern receiving system and a reflection system integrated with the elements of the product so that after exposure and processing, the image pattern can be viewed as a reflection print. The image receiving system of the products of the present invention comprise a transparent support or dimensionally stable layer through which the image pattern can be viewed and the transparent support or layer is characterized in that a distinctive UV light absorption capability is integrated therewith.Type: GrantFiled: August 7, 1975Date of Patent: May 24, 1977Assignee: Polaroid CorporationInventors: Ronald F. W. Cieciuch, Herbert N. Schlein
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Patent number: 4021241Abstract: The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive element adapted to provide, by diffusion transfer photographic processing, selective dyde image recordation of incident actinic radiation as a function of the point-to-point degree of photosensitive element exposure, which film unit includes a plurality of essential layers including a photosensitive silver halide layer having associated therewith dye image-forming material which is diffusible during processing as a function of the point-to-point degree of silver halide layer exposure to incident actinic radiation and a layer adapted to receive image-forming material diffusing thereto; means for applying an aqueous composition therebetween, said composition comprising 0.1-10%, by weight, of a viscosity increasing polymer comprising carboxymethyl hydroxyethyl cellulose. Optionally, said composition also includes titanium dioxide in a ratio of 1 to 10 g.Type: GrantFiled: March 10, 1976Date of Patent: May 3, 1977Assignee: Polaroid CorporationInventor: Richard W. Young
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Patent number: 4018610Abstract: A spectrally sensitized silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye represented by the following general formula (I): ##STR1## wherein Z.sup.1 and Z.sup.2 each represents an atomic group necessary for completing a benzimidazole nucleus, an oxazole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus excepting that both of Z.sup.1 and Z.sup.2 do not simultaneously represent an atomic group necessary for completing an oxazole nucleus, a benzoxazole nucleus or a naphthoxazole nucleus; R.sup.1 and R.sup.2 each represents an aliphatic group which may be substituted and the carbon chain of which may be interrupted with an oxygen atom or a sulfur atom; R.sup.0 represents a hydrogen atom, an alkyl group or an aralkyl group; X.sub.(1).sup.Type: GrantFiled: July 28, 1975Date of Patent: April 19, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Masanao Hinata, Haruo Takei, Akira Sato, Tadashi Ikeda
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Patent number: 4015989Abstract: A color photographic light-sensitive material which comprises a support having thereon at least one emulsion layer unit comprising;A. a hydrophilic colloid layer containing spontaneously developable silver halide grains which are associated with a coupler capable of reacting with an oxidation product of an aromatic primary amino color developing agent to provide a dye and which are rendered substantially light-insensitive with a desensitizer, andB. an adjacent negative type light-sensitive silver halide emulsion layer associated with a compound capable of reacting with an oxidation product of an aromatic primary amino color developer to release a diffusible development inhibitor.Type: GrantFiled: January 30, 1975Date of Patent: April 5, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasushi Oishi, Masanao Hinata
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Patent number: 4014700Abstract: A yellow dye developer having improved photographic properties represented by the formula (I) ##STR1## wherein X represents a hydrogen atom, a halogen atom, a nitro group, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, an acylamino group having 1 to 4 carbon atoms; Z represents an atomic group necessary for completing a furan ring or a benzofuran ring; Y represents a hydroxyl group, an acyloxy group having 1 to 4 carbon atoms, or an alkoxyacyloxy group having 2 to 4 carbon atoms; Ar represents an aromatic ring; R.sub.1 represents a hydrogen atom, a halogen atom, an acyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 5 carbon atoms; R.sub.2 represents a hydroxyl group, an acyloxy group having 1 to 4 carbon atoms, or an alkoxyacyloxy group having 2 to 4 carbon atoms with the R.sub.2 group being at the ortho-position to the azo group; m and n each is an integer of 1 to 4; and at least one of X, Z, Ar and R.sub.Type: GrantFiled: November 22, 1974Date of Patent: March 29, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinsaku Fujita, Yukio Maekawa, Kazuya Sano, Seiki Sakanoue
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Patent number: 4013635Abstract: Cyan azo dye-providing compounds having the formula ##STR1## wherein Car represents a carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye from said compound;X represents a bivalent linking group;R represents hydrogen or alkyl;J represents sulfonyl or carbonyl;M and q each represent an integer having a value of 0 or 1;Q represents hydroxy or acylamino;G represents a hydroxy radical, a salt thereof, or a hydrolyzable acyloxy group;D represents halogen, cyano, nitro, trifluoromethyl, alkyl, alkoxy, carboxy, a carboxylic acid ester, fluorosulfonyl, trifluoromethylsulfonyl, --SO.sub.3 --phenyl radical, sulfo, a sulfamoyl radical, a carbamoyl radical, an alkyl- or alkylsulfonyl radical, or a phenylsulfonyl radical;E represents hydrogen, halogen, nitro, cyano, or trifluoromethyl; andM represents sulfo, cyano, fluorosulfonyl, halogen, a -SO.sub.Type: GrantFiled: February 26, 1975Date of Patent: March 22, 1977Assignee: Eastman Kodak CompanyInventors: Richard A. Landholm, Jan R. Haase, James J. Krutak, Sr.
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Patent number: 4009029Abstract: Photographic elements are disclosed which contain a blocked development restrainer which is designed to provide timely release of a development restrainer when the photographic element is processed with an alkaline processing composition. The photographic elements are especially useful in image-transfer film units where the blocked development restrainers will permit initial development to occur and, upon cleavage, will substantially restrain further development.Type: GrantFiled: June 20, 1975Date of Patent: February 22, 1977Assignee: Eastman Kodak CompanyInventors: Howell Allen Hammond, Wilbert Jeptha Humphlett, Ilmari Fritiof Salminen
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Patent number: 4009031Abstract: Coating a solution comprising a hydrophilic colloid and ammonia over a receiving layer comprising polyvinylpyridine in an image-receiving element of a photographic film unit significantly reduces haze and facilitates the separation of the image-receiving element from the remainder of the film unit subsequent to diffusion transfer processing.Type: GrantFiled: June 6, 1975Date of Patent: February 22, 1977Assignee: Polaroid CorporationInventors: David P. Carlson, Thomas R. Keenan, Douglas L. Marks
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Patent number: 4009030Abstract: Timing layer for color diffusion transfer assemblages comprises a mixture of cellulose acetate and a maleic anhydride copolymer with 2 to 20% by weight of the mixture being said copolymer.Type: GrantFiled: November 5, 1974Date of Patent: February 22, 1977Assignee: Eastman Kodak CompanyInventor: Edward P. Abel
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Patent number: 4003744Abstract: The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive element adapted to provide, by diffusion transfer photographic processing, selective dye image recordation of incident actinic radiation as a function of the point-to-point degree of photosensitive element exposure, which film unit includes a plurality of photosensitive units each exhibiting a predetermined gamma of substantially the same value and within a range of 1.1 to 1.Type: GrantFiled: August 2, 1974Date of Patent: January 18, 1977Assignee: Polaroid CorporationInventor: Peter O. Kliem
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Patent number: 4002477Abstract: An improvement is provided in processes wherein an oxidation-reduction reaction is utilized to form an image. In one aspect of this invention, the improvement comprises employing an oxidizing agent and a reducing agent which undergo imagewise redox reaction in the presence of catalytic material, the oxidizing agent and the reducing agent being so chosen that the reaction products are noncatalytic for the oxidation-reduction reaction. In another aspect of this invention, a substitution inert metal complex is utilized as the oxidant in oxidation-reduction image-forming processes. In a specific aspect, image-transfer film units and processes of forming image records in image-transfer film units are disclosed wherein an inert transition metal complex and a reducing agent, which undergo redox reaction in the presence of a catalytic material, are present during processing of said film unit.Type: GrantFiled: August 22, 1975Date of Patent: January 11, 1977Assignee: Eastman Kodak CompanyInventor: Vernon Leon Bissonette
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Patent number: 3999991Abstract: A dye developer for silver halide photography comprising both a dye moiety represented by the following general formula (I): ##STR1## wherein R represents a halogen atom or an alkyl group containing 1 to 4 carbon atoms; k is an integer of from 0 to 4; A represents an acyl group containing 1 to 4 carbon atoms or an alkoxyacyl group containing from 2 to 4 carbon atoms; Ar represents an aromatic nucleus; X represents a halogen atom, an alkyl group, an alkoxy group, an acyl group or an acyloxy group, each containing 1 to 4 carbon atoms and l is an integer of from 0 to 4; and a polyhydric phenol moiety having silver halide developing activity.Type: GrantFiled: November 8, 1974Date of Patent: December 28, 1976Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinsaku Fujita, Seiki Sakanoue
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Patent number: 3998640Abstract: Heterocyclic N-oxides are useful as oxidants in photographic elements or film units.Type: GrantFiled: June 5, 1973Date of Patent: December 21, 1976Assignee: Eastman Kodak CompanyInventors: Samuel J. Ciurca, Albert T. Brault
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Patent number: 3998637Abstract: Positive color diffusion transfer images are produced by a process that employs light-sensitive photographic elements containing dye-releasing redox agents. The dye-releasing redox agents may be a sulfonamido compound or a hydroquinone derivative which are capable of cleaving to release a diffusible color-providing moiety. A preferred process involves the use of black-and-white developer compositions and comprises1. developing only a negative silver image in the imagewise exposed areas of the photographic element;2. fogging the residual silver halide;3. developing the residual silver halide in the fogged element to silver and concurrently releasing a diffusible dye or dye precurser in the non-image, fogged silver halide areas; and4. at least a portion of the diffusible dye or dye precurser compound diffusing to a dye image-receiving layer.Type: GrantFiled: August 1, 1975Date of Patent: December 21, 1976Assignee: Eastman Kodak CompanyInventors: William Henry Faul, Harry David Franchino
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Patent number: 3996050Abstract: This invention relates to photographic film structures for forming color transfer images viewable by reflected light without separation of the photosensitive and image-receiving components and to diffusion transfer processes employing these unitary film units wherein a dye is initially positioned in the image-receiving component to offset the color stain that tends to form in the highlights of the transfer image during aging. Any dye or mixture of dyes may be employed which are capable of absorbing visible light in a wavelength range complementary to the wavelength range absorbed by the color stain and are used in a concentration such that the highlights, i.e., D.sub.min areas of the transfer image, appear substantially white after aging, as observed by the eye. In a preferred embodiment, the dye employed is a dye developer.Type: GrantFiled: December 26, 1974Date of Patent: December 7, 1976Assignee: Polaroid CorporationInventor: Edwin H. Land
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Patent number: RE29148Abstract: A color photographic diffusion transfer process in which a color photographic material having at least one silver halide emulsion layer and a layer adjacent to said silver halide emulsion layer, said layer containing a dye developer, is image-wise exposed, brought into superposed position with an image-receiving element, and then treated with an alkaline processing solution to immobilize the dye developer at the exposed portions of the silver halide emulsion layer and diffusion-transfer the dye developer at the nonexposed portions of the silver halide emulsion layer to the image-receiving element, with the alkali processing being conducted in the presence of 6,6',7,7' -tetrahydroxy-4,4,4',4'-tetramethyl-bis-2,2'-.Iadd.spirochroman. .Iaddend..[.spirocumarone.].Type: GrantFiled: September 17, 1975Date of Patent: March 8, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshinobu Yoshida, Atsuaki Arai
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Patent number: T957002Abstract: a photographic element is disclosed which includes a support having as a coating thereon a radiation-sensitive layer capable of selectively releasing protons in exposed areas. In direct contact with the radiation-sensitive layer is an image-forming dye capable of shifting between a mobile and an immobile form in an aqueous medium upon protonation of a carboxy or amine substituent. The portion of the dye remaining mobile after imagewise protonation can be transferred to a receiver sheet to form a viewable dye image.Type: GrantFiled: November 4, 1976Date of Patent: April 5, 1977Inventor: James W. Meyer