Patents by Inventor Mitsuto Fujiwhara
Mitsuto Fujiwhara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5051346Abstract: There is disclosed a light-sensitive photographic material which comprises a silver halide emulsion layer containing a first coupler dispersed in oil droplets, a second coupler dispersed in an alkali aqueous solution and a compound capable of releasing a diffusible development inhibiting substance or a precursor thereof.The specified combination of the first and the second couplers with the diffusible DIR coupler according to the present invention provide a good inter image effect whereby color images having excellent color balance are obtained.Type: GrantFiled: August 31, 1990Date of Patent: September 24, 1991Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Takashi Uchida
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Patent number: 5041667Abstract: A process for producing a chlorohenylhydrazine compound is disclosed, which comprises chlorinating at least one hydrogen atom on the phenyl nucleus in a beta-imidated phenylhydrazine compound and subsequently hydrolyzing the chlorinated compound. Said chlorophenylhydrazine compound is useful as starting material for the production of herbicide, insecticide and photographic coupler is produced in high yield and low cost.Type: GrantFiled: June 26, 1986Date of Patent: August 20, 1991Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Tamotsu Kojima
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Patent number: 4968594Abstract: A negative-working silver halide color photographic material is disclosed which has at least one silver halide emulsion layer on a support, said material including a pyrazolotriazole-based magenta coupler and means for forming an unsharp positive image.Type: GrantFiled: June 1, 1989Date of Patent: November 6, 1990Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hiroshi Shimazaki, Mitsuto Fujiwhara
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Patent number: 4871655Abstract: A light-sensitive silver halide color photographic material, comprising at least one photographic constituent layer containing a multi-functional dye which becomes substantially colorless in the presence of the oxidized product of a color developing agent through the reaction with the oxidized product, and becomes substantially colorless in the absence of the oxidized product of the color developing agent during the color-photographic processing step.According to the present invention, a color light-sensitive material containing a multi-functional compound having excellent sharpness, good color reproducibility and further excellent graininess can be obtained.Type: GrantFiled: December 30, 1987Date of Patent: October 3, 1989Assignee: Konica CorporationInventors: Mitsuto Fujiwhara, Takashi Uchida, Toshihiko Kimura
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Patent number: 4690888Abstract: A photosensitive silver halide colored photographic material having (1) ballasted couplers combined with photosensitive silver halide emulsions and (2) colored compounds capable of reacting with oxidized developing agent, wherein the colored compounds are capable of diffusing in the photographic material during developing treatments and have their principal absorption in the main absorption wavelength region of the dye produced by the reaction of the coupler with the developing agent.Type: GrantFiled: September 10, 1985Date of Patent: September 1, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Takao Nimura, Yasumasa Numata, Yasuko Matsubara
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Patent number: 4416980Abstract: High-contrast light-sensitive silver halide photographic material which comprises a support, a silver halide emulsion layer containing silver halide and another hydrophilic colloidal layer coated on the support, at least one of said silver halide emulsion layer and another hydrophilic colloidal layer containing a substantially non-diffusible compound having oxidizing power on a hydroquinone developing agent, and the thickness, in an aqueous solution having the composition described as in the specification kept at 23.degree. C., of said at least one layer being from 1.2-4.5 times that of said layer dried in an atmosphere at 23.degree. C. at a relative humidity of 55%.Type: GrantFiled: September 4, 1980Date of Patent: November 22, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Yutaka Kaneko, Mikio Kawasaki
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Patent number: 4368258Abstract: In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance in dispersed polymer particles in an aqueous polymer latex, the improvement comprises impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is solid state, a water-miscible organic solvent and aqueous polymer latex wherein a polymer of the polymer latex is prepared from ethene monomers and containing at least one hydrophilic group.Type: GrantFiled: March 11, 1981Date of Patent: January 11, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Tsuneo Wada, Naoto Abe, Toyoaki Masukawa, Akio Iijima, Keiji Oishi
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Patent number: 4314023Abstract: A photographic yellow coupler having a general formula selected from the group consisting of (I), (II) and (III) ##STR1## wherein A is a yellow coupler residue defined by removing one hydrogen atom of a active methylene group from a yellow coupler having the active methylene group; Q is a group having a formula selected from the group consisting of ##STR2## and ##STR3## (where X and Y are individually a hydrogen atom or an alkyl, acyl, aryl or aralkyl group; Z is a hydrogen atom or an alkyl, aryl or aralkyl group; and R.sub.1 and R.sub.2 are individually a hydrogen atom or an alkyl, aryl or aralkyl group or both of R.sub.1 and R.sub.2 together may form a benzylidene group or a cycloalkyl group); and Q' is a group of the formula --CH.sub.2 --CH.sub.2 -- or ##STR4## (wherein R.sub.3 is a hydrogen or halogen atom or an alkoxy group; R.sub.4 is a hydrogen or halogen atom, an amino, acylamino, ureido, lower alkyl, alkoxy or hydroxy group; and R.sub.4 and R.sub.5 are individually a lower alkyl group).Type: GrantFiled: November 24, 1980Date of Patent: February 2, 1982Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tamotsu Kojima, Hiroyuki Imamura, Mitsuto Fujiwhara, Wataru Fujimatsu, Takaya Endo
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Patent number: 4289847Abstract: The present invention relates to a method of forming a dye image which involves processing a light-sensitive silver halide photographic image, after its imagewise exposure, in the presence of a novel yellow coupler as depicted in the formula below and an aromatic primary amine color developing agent ##STR1## wherein R.sub.1 represents cyano, alkyl carbonyl, phenylalkyl carbonyl, phenoxy alkyl carbonyl, phenylthio alkyl carbonyl, arylcarbonyl, alkyl phenyl carbonyl, alkoxy phenyl carbonyl, R.sub.2, R.sub.3, R.sub.4, R.sub.5 independently are hydrogen, halogen, alkyl, alkoxy, aryloxy, alkylacyloxy, arylacyloxy, acylamino, N-alkyl carbamoyl, N-phenylcarbamoyl, alkylsulfonamido, arylsulfonamido, N-alkyl sulfamoyl, N-phenylsulfamoyl, or imido, R.sub.6 represents cycloalkyl, alkenyl, naphthyl, thienyl, benzothienyl, furyl, or pyranyl, or a group of the formula (II): ##STR2## wherein R.sub.7, R.sub.9 and R.sub.11 are each hydrogen or alkyl, the sum of the carbon atoms in R.sub.7, R.sub.9 and R.sub.Type: GrantFiled: July 21, 1980Date of Patent: September 15, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Wataru Ishikawa, Mitsuto Fujiwhara, Tamotsu Kojima, Takaya Endo, Katsunori Kato
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Patent number: 4275148Abstract: A color photographic material comprising a light-sensitive silver halide emulsion layer coated on a support containing a magenta coupler represented by general formual [I] or [II]: ##STR1## wherein, R.sub.1 represents a hydrogen atom, an alkyl, aryl or 5 or 6-membered heterocyclic group, R.sub.2 represents a hydrogen atom, an alkyl, aryl, 5 or 6-membered heterocyclic, amino, sulfamoyl or carbamoyl group, R.sub.3 represents an alkyl, aryl or 5 or 6-membered heterocyclic group having from 12 to 35 carbon atoms, R.sub.4 represents an alkyl group having from 2 to 8 carbon atoms or a phenyl group, and R.sub.5 represents an alkyl group having from 2 to 8 carbon atoms.Type: GrantFiled: November 28, 1978Date of Patent: June 23, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tamotsu Kojima, Mitsuto Fujiwhara, Takaya Endo, Akio Iijima
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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: 4233400Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of 0.05 to 1.5.mu. and a tetrazolium compound and a method of processing thereof.Type: GrantFiled: March 2, 1979Date of Patent: November 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Yutaka Kaneko, Mikio Kawasaki
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Patent number: 4210715Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon which contains silver halide grains having an average grain size of 0.05 to 1.5.mu., a tetrazolium compound and a sensitizing dye.Type: GrantFiled: March 2, 1979Date of Patent: July 1, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Yutaka Kaneko, Mikio Kawasaki
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Patent number: 4207111Abstract: A color photosensitive material having a support and a silver halide photosensitive layer which material includes a coupler represented by the following formulas (IV), (V) or (VI) having therein a group represented by formula (I), said coupler being capable of forming an azomethine dye on coupling with the oxidation product of an aromatic primary amine developer: ##STR1## wherein the substituents on the above formulas is herein defined, is described, said couplers capable of giving improved light fastness.Type: GrantFiled: December 27, 1977Date of Patent: June 10, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Takashi Sasaki, Takashi Uchida
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Patent number: 4203767Abstract: In a process for providing a color image which comprises imagewise exposing a multilayered light-sensitive photographic material comprising a support and a light-sensitive silver halide emulsion layer not having a coupler incorporated therein and thereafter developing said exposed photographic material with a coupler-containing color developer, the speed and color density of the image are improved by incorporating into the light-sensitive silver halide emulsion layer or the layer contiguous therewith oil particles of a high boiling solvent such as phthalate, phosphate, amide and alcohol type solvents.Type: GrantFiled: November 9, 1977Date of Patent: May 20, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Yutaka Kaneko, Toyoaki Masukawa, Mikio Kawasaki
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Patent number: 4200466Abstract: A light-sensitive silver halide photographic material comprising a m-aminophenol type coupler of the structure particularly defined therein is disclosed, which can successfully yield an excellent image stable against oxidation.Type: GrantFiled: February 1, 1978Date of Patent: April 29, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Mikio Kawasaki, Toyoaki Masukawa, Yutaka Kaneko
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Patent number: 4192681Abstract: An improved process for forming an amplified dye image on an image-wise, exposed light-sensitive silver halide photographic material is described, which, after developing, is processed with an amplifying solution the improvement being in that (a) the coupler is in stoichiometric excess of at least 50% relative to the amount of silver halide, (b) the dry thickness ratio of the hydrophilic colloid layer to the silver halide emulsion layer is 1 to 10 and (c) the amplifying solution contains hydrogen peroxide.Type: GrantFiled: October 1, 1976Date of Patent: March 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Mikio Kawasaki, Toyoaki Masukawa, Yutaka Kaneko
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Patent number: 4189321Abstract: A process for forming color photographic images using magenta couplers which afford excellent resistance to formalin, is described.Type: GrantFiled: August 24, 1978Date of Patent: February 19, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tamotsu Kojima, Mitsuto Fujiwhara, Takaya Endo, Osamu Ezawa
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Patent number: 4175966Abstract: A light-sensitive silver halide photographic material containing a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent in a hydrophilic colloidal layer is processed, after light exposure, with a developer containing the said hydroquinone developing agent to form a high-contrast silver image.Type: GrantFiled: October 4, 1978Date of Patent: November 27, 1979Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Yutaka Kaneko, Mikio Kawasaki
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Patent number: 4159910Abstract: The present invention is related to a color photosensitive material which has a support and a silver halide photosensitive layer and contains a specific compound which acts as a fading inhibitor and also prevents Y-staining.Type: GrantFiled: August 8, 1977Date of Patent: July 3, 1979Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Takashi Sasaki, Takashi Uchida