Using Mercapto Or Thione Compound Patents (Class 430/445)
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Patent number: 4390613Abstract: There is disclosed a diffusion transfer photographic system wherein development of an exposed photosensitive element with an aqueous alkaline processing composition is effected in the presence of a compound represented by the formula ##STR1## wherein X represents the nonmetallic atoms necessary to form a nucleus which completes a 5- or 6-membered heterocyclic moiety on said structure including substituted rings and fused rings; R is H, an alkali metal or a group which is cleavable in a photographic aqueous alkaline processing composition; and R.sub.1 is either a group which has a pKa of from about 7 to about 14 which is ionizable to an anion whereby the silver salt of the mercaptan (resulting from cleavage or ionization of --SR) is rendered more soluble in the pH range within which R.sub.1 is ionized to an anion than it is below that pH range, or a precursor of such a group.Type: GrantFiled: January 5, 1981Date of Patent: June 28, 1983Assignee: Polaroid CorporationInventors: Avinash C. Mehta, George H. Nawn, Lloyd D. Taylor
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Patent number: 4371610Abstract: A process for development-processing a silver halide black-and-white photographic light-sensitive material without silver stain and fog by the use of a developing solution which contains 0.1 mole/l or more of sulfite and at least one compound represented by the following general formula (I) or (II) ##STR1## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n represents an integer of 1 to 8; and X represents a sulfonic acid group, a sulfonate group, a carboxylic acid group or a carboxylate group.Type: GrantFiled: July 24, 1981Date of Patent: February 1, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Toyoda, Isamu Itoh, Minoru Yamada
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Patent number: 4350752Abstract: Imidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein: J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents hydrogen, alkyl or 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms; andPR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the imidomethyl blocking group.Type: GrantFiled: December 29, 1980Date of Patent: September 21, 1982Assignee: Eastman Kodak CompanyInventors: James A. Reczek, Thomas R. Welter
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Patent number: 4350754Abstract: There are described novel compounds which are represented by the formula ##STR1## wherein R is ##STR2## A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R.sub.1 is H or lower alkyl; R.sub.2 is H or a hydrolyzable group; and R.sub.3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.Type: GrantFiled: June 12, 1981Date of Patent: September 21, 1982Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Anthony J. Puttick
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Patent number: 4346166Abstract: For making families of steady-state heat transfer coefficient curves visible, the invisible residual moisture profile obtained by exposing a moisture photogelatin layer to a gas is immersed, in daylight, in a soluble organic sulfur compound, particularly thioacetamide, and is converted into a silver sulfide line photogram. The method is used, for example, for making visible families of steady-state heat transfer coefficient curves on forced air-cooled electronic assemblies.Type: GrantFiled: February 20, 1981Date of Patent: August 24, 1982Assignee: Siemens AktiengesellschaftInventors: Bernhard Montag, Heinrich Optiz
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Patent number: 4343893Abstract: Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.Type: GrantFiled: July 25, 1980Date of Patent: August 10, 1982Assignee: E. I. Du Pont de Nemours and CompanyInventors: Dennis S. Donald, Ross A. Lee
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Patent number: 4328302Abstract: A lithographic silver halide photographic light-sensitive material is described which scarcely exhibits colored fringe and black pepper, forms halftone dots of good quality whether a fresh or an exhausted developer is used for processing thereof, and which scarcely shows a drop in sensitivity even when a developer contaminated by a fixing solution is used; said material comprises a support and at least one lithographic silver halide emulsion layer, and containing in said emulsion layer or in another hydrophilic colliodal layer which does not contain silver halide emulsion at least one compound represented by formula (I) ##STR1## wherein M represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ; X represents --SO.sub.2 NHR', --COOM', --SO.sub.3 M', --OH or --CONH.sub.2, wherein M' represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym.Type: GrantFiled: February 9, 1981Date of Patent: May 4, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Tatsuo Nishimura, Hiroyuki Mifune, Yoshiharu Fuseya, Yukihide Urata, Tadao Shishido, Yasuo Kasama
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Patent number: 4323643Abstract: A silver halide photographic light-sensitive material is described, comprising at least one silver halide photographic emulsion layer, wherein at least one layer contains a compound represented by formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each represents hydrogen, an aliphatic group, an aromatic group, or a heterocyclic group;R.sup.3 represents hydrogen or an aliphatic group, andX represents a divalent aromatic group.The light-sensitive material provides high-contrast negative images and good dot image quality.Type: GrantFiled: November 6, 1980Date of Patent: April 6, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Shigeo Hirano, Yoshitaka Akimura
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Patent number: 4310621Abstract: New DIR-compounds of the formula ##STR1## are useful in photographic materials and processes.Type: GrantFiled: December 16, 1980Date of Patent: January 12, 1982Assignee: AGFA-Gevaert AktiengesellschaftInventors: Heinrich Odenwalder, Karl Frank, Reinhard Muller
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Patent number: 4310622Abstract: A process is described for developing a black-and-white silver halide photosensitive material comprising treating the material with a developing solution containing a sludge preventing compound represented by the formula (I) ##STR1## wherein X represents hydrogen, a hydroxyl group, a lower alkyl group, a lower alkoxy group, a halogen atom, a carboxyl group or a sulfo group, and M.sup.1 and M.sup.2, which may be the same or different, each represents hydrogen, an alkali metal atom, or an ammonium group.Type: GrantFiled: August 1, 1980Date of Patent: January 12, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinzaburo Onda, Eiichi Okutsu, Isamu Itoh, Hiroyuki Mifune
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Patent number: 4272606Abstract: A method of forming an extremely high-contrast negative photographic image which comprises image-wise exposing a photographic light-sensitive material comprising a support having thereon a mono-disperse silver halide emulsion layer containing surface latent image type silver halide grains and also containing a compound represented by the following general formula (1):R.sup.1 NHNHCOR.sup.2 (I)wherein R.sup.1 represents an aryl group, R.sup.2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms, and then processing the exposed light-sensitive material in the presence of a compound having a thioamido moiety in the molecule thereof.Type: GrantFiled: February 1, 1980Date of Patent: June 9, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Shunji Takada, Yoshitaka Akimura, Yoshiharu Fuseya
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Patent number: 4250252Abstract: In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula ##STR1## R.sub.1 =hydrogen or alkyl with 1-3 carbon atoms R.sub.2 =alkyl with up to 22 carbon atoms the group --S--Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.Type: GrantFiled: October 3, 1975Date of Patent: February 10, 1981Assignee: AGFA-Gevaert, A.G.Inventors: Heinrich Odenwalder, Hans Vetter, Walter Puschel, Erwin Ranz
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Patent number: 4234678Abstract: A photographic material having a light-sensitive silver halide emulsion layer coated on a support and containing a compound, useful as a development inhibitor of the formula: ##STR1## wherein X, Y and Z are as herein defined, is described.Type: GrantFiled: November 20, 1978Date of Patent: November 18, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shinji Yoshimoto, Mitsuto Fujiwhara, Shoji Kikuchi, Ryosuke Satoh, Takaya Endo, Satoshi Nakagawa
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Patent number: 4226934Abstract: A light-sensitive photographic material is provided which comprises, coated on a photobase, at least one silver halide emulsion layer, said emulsion layer or a layer adjacent thereto containing a development inhibitor releasing compound of the formula ##STR1## wherein R.sub.1 is substituted phenyl which contains a ballasting alkyl group, R.sub.2 represents the atoms necessary to complete a five or six membered heterocyclic ring system which may be further substituted and R.sub.3 is an aryl or heterocyclic radical, any of which ring systems may be further substituted, the group --S--R.sub.3 being a development inhibiting group.Type: GrantFiled: July 26, 1978Date of Patent: October 7, 1980Assignee: Ciba-Geigy AGInventors: Terence C. Webb, David L. R. Reeves
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Patent number: 4210714Abstract: Process for the preparation of silver images by imagewise exposure of a photographic material comprising at least one light-sensitive silver halide emulsion layer and treatment of the material with a developer composition, wherein the improvement comprises the development is carried out in the presence of 3-mercapto-5-(2-furyl)-1,2,4-triazole. The 3-mercapto-5-(2-furyl)-1,2,4-triazole decreases the fog during development, and when this is the first development in a black-and-white or color reversal process, increases the reversal silver or color density.Type: GrantFiled: March 15, 1978Date of Patent: July 1, 1980Assignee: AGFA-Gevaert, A.G.Inventors: Heinrich Odenwalder, Anita von Konig, Franz Moll, Walter Patzold, Lothar Rosenhahn, Friedhelm Sommer
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Patent number: 4202695Abstract: Fine-grain silver halide emulsions of the Lippmann-type are described which comprise derivatives of heterocyclic mercaptans corresponding to the formulae: ##STR1## wherein: each of Z.sub.1 and Z.sub.2 represents the atoms necessary to complete a 5- or 6-membered heterocyclic ring system,n is 0 or 1,X is --CO-- or --CS--,R is an alkyl group or an aryl group, andY is --CO--, --COO--, --CS--, --SO.sub.2 --, --CON(R.sub.1)-- or --CSN(R.sub.1)--, R.sub.1 being hydrogen, alkyl or aryl.Both in reversal and negative processing sharpness of fine detail is improved and the distortion of image-details is reduced. Upon reversal processing yellow staining is also reduced.Type: GrantFiled: January 30, 1975Date of Patent: May 13, 1980Assignee: AGFA-GEVAERT N.V.Inventors: Herman A. Philippaerts, Robert J. Pollet, Wolfgang Muller-Bardorff, Wilhelm Saleck, Anita von Konig, Walter Gauss, Franz Moll, Theofiel H. Ghys
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Patent number: 4199354Abstract: Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photograhically useful group.Type: GrantFiled: December 20, 1974Date of Patent: April 22, 1980Assignee: Eastman Kodak CompanyInventors: Jerald C. Hinshaw, Paul B. Condit
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Patent number: 4174969Abstract: For controlling in a color photographic material the gradation, graininess, sharpness, edge and interimage effect and thus improving the overall color reproduction thioether DIR compounds of the following formula are particularly useful: ##STR1## in which X is a group that if split off together with the sulfur atom forms a diffusing development inhibiting mercaptan, Y represents --O--, ##STR2## or --S--, Z represents the ring members completing a 6-membered heterocyclic ring, R.sup.1 is an aliphatic, araliphatic or aromatic hydrocarbon group, a heterocyclic group or acyl, and R.sup.2 is the same as R.sup.1 or hydrogen.Type: GrantFiled: April 15, 1977Date of Patent: November 20, 1979Assignee: AGFA-Gevaert, A.G.Inventors: Heinrich Odenwalder, Erwin Ranz