Patents by Inventor Kazunori Hasebe
Kazunori Hasebe 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: 4892803Abstract: A color image-forming process which comprises developing, after imagewise exposure, a color photographic paper having at least one light-sensitive layer containing a core/shell surface latent image type monodispersed silver halide emulsion containing substantially no silver iodide, having a silver chloride content of up to 80 mol %, and having a silver bromide content in the shell portion lower than in the core portion with a color developer containing substantially no benzyl alcohol.When the color photographic paper described above is processed, color images having less fog can be obtained with high color density in a short time without using benzyl alcohol as a development accelerator, with the benzyl alcohol causing a pollution problem.Type: GrantFiled: September 23, 1987Date of Patent: January 9, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Kokichi Waki, Kazunori Hasebe, Masahiro Asami
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Patent number: 4865962Abstract: A photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, characterized in that the emulsion layer contains silver chlorobromide prepared in such a manner that silver halide regular crystal grains, having no twinning crystal plane and containing 50 mol % or more of silver chloride, are used as host grains, an organic compound is adsorbed on a surface of each of the host grains, and sulfur-plus-gold sensitization is performed, either during or after halide conversion in the presence of a bromide.Type: GrantFiled: December 28, 1987Date of Patent: September 12, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hasebe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa, Kei Sakanoue, Akira Abe
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Patent number: 4820624Abstract: A corner development type silver halide photographic emulsion is disclosed, wherein the silver halide crystals in the silver halide emulsion are cubic or tetradecahedral grains having at least substantial (100) planes and the emulsion is controlled so that at least 70% of developed silver halide crystals (grains), which are observed on applying a light exposure of 1/50 second to the emulsion under the light-exposure condition corresponding to (maximum density --minimum density).times.3/4 of the silver image in the characteristic curve of the emulsion obtained by the developer, developing under the development condition which are used for processing a photographic light-sensitive material formed by coating the emulsion on a support, and stopping the development with an aqueous solution of 5% glacial acetic acid just after the initiation of the development, are developed at the corners of the cubic or tetradecahedral crystals or at the vicinity of the corners.Type: GrantFiled: December 28, 1987Date of Patent: April 11, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hasebe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa
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Patent number: 4818673Abstract: A method for processing a silver halide color photographic material is disclosed, which comprises processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer comprising silver chloride or silver chlorobromide containing at least 80 mol % of silver chloride with a color developing solution and thereafter processing the material with a bleach-fixing solution, wherein the bleach-fixing solution contains a ferric complex salt of an organic acid and from about 1.times.10.sup.-2 to about 2 mol of bromide ions and/or from about 5.times.10.sup.-4 to about 5.times.10.sup.-2 mol of iodide ions per liter.The method for processing a silver halide color photographic material according to the present invention is excellent in desilvering ability, and enables rapid processing to be conducted.Type: GrantFiled: August 5, 1987Date of Patent: April 4, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinji Ueda, Kazunori Hasebe, Junya Nakajima
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Patent number: 4803152Abstract: A photogrphic light-sensitive material comparing a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer comprises a silver chlorobromide emulsion which is substantially free of iodide and has a chloride content which satisfies the following relationship (I) between a mean mole % of silver chloride in grain group (A), in which the grains have sizes not less than the median size in the grain size distribution, and a mean mole % of silver chloride in grain group (B) in which the grains have sizes less than the median size, whereby excellent gradation and wide exposure latitude are achieved, and there is a small dependence on the development conditions.Relationship (I): 1.ltoreq.[Mean mol % of silver chloride in grain group (A)]-[Mean mol % of silver chloride in grain group (B)].ltoreq.99.Type: GrantFiled: June 5, 1987Date of Patent: February 7, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuhito Momoki, Kazunori Hasebe
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Patent number: 4745047Abstract: A color image-forming process is disclosed, which comprises imagewise exposing a silver halide photographic material comprising a reflective support having provided thereon at least one light-sensitive silver halide emulsion layer constituted by at least two kinds of monodispersed silver halide grains containing substantially no silver iodide and substantially deffering from each other in mean grain size, and developing the exposed photographic material for a developing time of within 2 minutes and 30 seconds using a color developer containing substantially no benzyl alcohol.Type: GrantFiled: January 27, 1987Date of Patent: May 17, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiro Asami, Kazunori Hasebe
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Patent number: 4626498Abstract: A color reversal photographic light-sensitive material is described having at least one light-sensitive silver halide emulsion layer, wherein at least one of said emulsion layer and a layer adjacent thereto contains a silver halide emulsion of silver halide grains containing internal fog centers.Type: GrantFiled: May 21, 1984Date of Patent: December 2, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Sadanobu Shuto, Yasuhiro Hayashi, Munehisa Fujita, Kazunori Hasebe
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Patent number: 4608334Abstract: A silver halide color light-sensitive material having improved graininess is described, comprising a support having provided thereon at least two emulsion layers that are sensitive to the same color light but have different sensitivities, wherein a light-insensitive intermediate layer comprising gelatin is provided between any two of said emulsion layers that are adjacent to each other and the higher sensitivity emulsion layer of said two layers has a smaller silver/coupler molar ratio than that of the lower sensitivity emulsion layer of said two emulsion layers.Type: GrantFiled: September 12, 1985Date of Patent: August 26, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Sadanobu Shuto, Munehisa Fujita, Kazunori Hasebe
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Patent number: 4568635Abstract: A silver halide light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed. The emulsion layer contains a silver halide prepared in the presence of a tetrasubstituted thiourea as a silver halide solvent and was hardened with a hardener containing a vinylsulfonyl group. Combined use of the tetrasubstituted thiourea and the hardener of the above-described kinds increases the storability of the light-sensitive material.Type: GrantFiled: January 27, 1984Date of Patent: February 4, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Yamagami, Kazunori Hasebe, Naoyasu Deguchi, Koki Nakamura, Hiroyuki Mifune
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Patent number: 4554245Abstract: A color reversal photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer, an organic compound and colloid grains of a metal or metal sulfide or silver halide grains the surface of which is previously fogged. The silver halide emulsion layer includes fine grains of silver halide particles having a particle size of 0.3.mu. or less. The fine grain particles are present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver halide grains in the emulsion. The silver halide emulsion also includes coarse grains having a particle size of more than 0.3.mu.. The organic compound has a solubility product constant of 10.sup.-14 or less when forming a salt with a silver ion.Type: GrantFiled: January 30, 1984Date of Patent: November 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuhiro Hayashi, Naoyasu Deguchi, Hiroyuki Yamagami, Kensuke Goda, Kazunori Hasebe
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Patent number: 4388401Abstract: A multilayer color reversal light-sensitive material is described, which can provide dye images having improved sharpness and graininess without a drop in color reproducibility, by employing a specific arrangement and construction of emulsion layers in its multi-layer structure, viz., a material comprising a support, a yellow filter layer, a group of green-sensitive emulsion layers, and a group of red-sensitive emulsion layers, wherein said emulsion layer groups are positioned nearer to the support than the yellow filter layer, each of the emulsion layer groups comprises at least two adjacent layers including a high-sensitivity silver halide emulsion layer containing silver halide grains having an average size of from 0.6.mu. to 2.0.mu. and a low-sensitivity silver halide emulsion layer containing silver halide grains having an average grain size of from 0.1.mu. to 0.5.mu.Type: GrantFiled: December 29, 1981Date of Patent: June 14, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hasebe, Yoshisato Minagawa
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Patent number: 4155763Abstract: A method for processing a silver halide color photographic light-sensitive material which comprises developing an image-wise exposed silver halide color light-sensitive material in the presence of (a) an aromatic primary amine color developing agent, (b) hydroxylamine or a hydroxylamine derivative, and (c) a 1-aryl-3-pyrazolidone derivative containing two substituent groups at the 4-position thereof.Type: GrantFiled: September 7, 1977Date of Patent: May 22, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hasebe, Shinzo Kishimoto, Tsutomu Hamaoka, Masakazu Morigaki, Yosuke Nakajima
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Patent number: 4095982Abstract: A development method which comprises developing a silver halide photographic ligh-sensitive material in the presence of a compound represented by the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represent a hydrogen atom, alklyl group, alkenyl group, aralkyl group or aryl group, X represents an anion, and P is 1 or 2.Type: GrantFiled: October 19, 1976Date of Patent: June 20, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Masakazu Yoneyama, Isao Shimamura, Shinzo Kishimoto, Kazunori Hasebe