Patents by Inventor Genichi Furusawa
Genichi Furusawa 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: 7381239Abstract: Disclosed are alloy nano-particles having a fluctuation coefficient of particle size of 20% or less and a fluctuation coefficient of composition of 20% or less. The alloy nano-particles have a low transformation point and hardly aggregate and which can form a flat magnetic film having high coercive force.Type: GrantFiled: June 25, 2004Date of Patent: June 3, 2008Assignee: Fujifilm CorporationInventors: Koukichi Waki, Genichi Furusawa, Yasushi Hattori
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Patent number: 7129032Abstract: The invention provides a black and white photothermographic material including, on at least one surface of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, wherein 50% or more of the total projected area of the photosensitive silver halide grains is occupied by tabular grains having an aspect ratio of 2 or more, and at least one apex portion of each tabular grain has an epitaxial junction. An image forming method is also provided, the method including bringing the photothermographic material into close contact with a fluorescent intensifying screen containing a fluorescent substance, wherein 50% or more of emission light of the fluorescent substance has a wavelength of 350 nm to 420 nm, and applying X-ray exposure. The black and white photothermographic material has high sensitivity and is superior in image storability and raw stock storability.Type: GrantFiled: October 21, 2004Date of Patent: October 31, 2006Assignee: Fuji Photo Film Co., LTDInventors: Takayoshi Mori, Genichi Furusawa, Hiroyuki Mifune
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Patent number: 6902877Abstract: A silver halide photographic emulsion comprising grains, wherein not less than 50% of the number of all the grains are occupied by silver iodebromide or silver bromochloroiodide tabular grains each meeting the requirements (i) to (iii) below: (i) a thickness is less than 0.13 ?m; (ii) an equivalent-circle diameter is not less than 1.0 ?m; and (iii) a silver iodide content in a fringe internal region A between a twin plane and a grain major surface is higher than a silver iodide content in a fringe internal region B between two twin planes.Type: GrantFiled: February 27, 2003Date of Patent: June 7, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoichi Maruyama, Genichi Furusawa
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Publication number: 20050118542Abstract: The invention provides a black and white photothermographic material including, on at least one surface of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, wherein 50% or more of the total projected area of the photosensitive silver halide grains is occupied by tabular grains having an aspect ratio of 2 or more, and at least one apex portion of each tabular grain has an epitaxial junction. An image forming method is also provided, the method including bringing the photothermographic material into close contact with a fluorescent intensifying screen containing a fluorescent substance, wherein 50% or more of emission light of the fluorescent substance has a wavelength of 350 nm to 420 nm, and applying X-ray exposure. The black and white photothermographic material has high sensitivity and is superior in image storability and raw stock storability.Type: ApplicationFiled: October 21, 2004Publication date: June 2, 2005Inventors: Takayoshi Mori, Genichi Furusawa, Hiroyuki Mifune
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Patent number: 6893811Abstract: A silver halide photographic emulsion comprising epitaxial junction type tabular grains. The epitaxial junction type tabular grains each satisfying the following requirements (i) to (iv) occupy 100 to 50% (grain numerical ratio) of all the grains contained in the silver halide photographic emulsion: (i) host tabular grain is a tabular grain of silver iodobromide or silver iodochlorobromide having {111} faces as main planes and two parallel twin planes; (ii) at least one silver halide epitaxial portion is formed, per grain, only on a corner portion of the host tabular grain; (iii) a portion of an external surface of the silver halide epitaxial portion has a face parallel to the main plane of the host tabular grain; and (iv) a portion of an external surface of the silver halide epitaxial portion has a {100} face.Type: GrantFiled: September 16, 2003Date of Patent: May 17, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Makoto Kikuchi, Yoichi Hosoya, Genichi Furusawa
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Publication number: 20050022628Abstract: Disclosed are alloy nano-particles having a fluctuation coefficient of particle size of 20% or less and a fluctuation coefficient of composition of 20% or less. The alloy nano-particles have a low transformation point and hardly aggregate and which can form a flat magnetic film having high coercive force.Type: ApplicationFiled: June 25, 2004Publication date: February 3, 2005Applicant: Fuji Photo Film Co., Ltd.Inventors: Koukichi Waki, Genichi Furusawa, Yasushi Hattori
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Patent number: 6730466Abstract: A silver halide photographic emulsion comprises silver iodochlorobromide tabular grains each having (111) faces as main planes thereof. 70% or more of the total projected area of all the grains contained in the emulsion is occupied by grains each meeting conditions (i) to (iv): (i) a hexagonal tabular grain whose ratio of the length of an edge having the maximum length with respect to the length of an edge having the minimum length, is 2 or less; (ii) an epitaxial junction portion having a silver chloride content of 5 mol % or more and 25 mol % or less, is provided on at least one apex portion of the hexagon; (iii) a silver chloride content thereof is 0.5 mol % or more and 6 mol % or less; and (iv) a silver iodide content thereof is 0.5 mol % or more and 10 mol % or less.Type: GrantFiled: January 3, 2002Date of Patent: May 4, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Ihama, Genichi Furusawa
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Patent number: 6727054Abstract: A silver halide photographic emulsion is disclosed, comprising silver chloroiodide grains or silver chloroiodobromide grains, having 90 mol % or more of a silver chloride content, wherein the silver chloroiodide grains or silver chloroiodobromide grains have a layer having a silver iodide content of decreasing in the depth direction from the grain surface.Type: GrantFiled: March 28, 2002Date of Patent: April 27, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Aiba, Osamu Yonekura, Genichi Furusawa, Naoto Ohshima
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Publication number: 20040067459Abstract: A silver halide photographic emulsion comprising epitaxial junction type tabular grains.Type: ApplicationFiled: September 16, 2003Publication date: April 8, 2004Applicant: FUJI PHOTO FILM., LTD.Inventors: Makoto Kikuchi, Yoichi Hosoya, Genichi Furusawa
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Publication number: 20030194665Abstract: A silver halide photographic emulsion comprising grains, wherein not less than 50% of the number of all the grains are occupied by silver iodebromide or silver bromochloroiodide tabular grains each meeting the requirements (i) to (iii) below:Type: ApplicationFiled: February 27, 2003Publication date: October 16, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yoichi Maruyama, Genichi Furusawa
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Patent number: 6632595Abstract: A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains meeting the requirements (i) to (iii): (i) a silver iodobromide or silver iodochlorobromide tabular grain having (111) faces as main planes and having two parallel twin planes; (ii) a thickness of 0.12 &mgr;m or less; and (iii) the tabular grains have a grain fringe portion meeting the requirements: (a) the grain fringe portion has a phase of high silver iodide content in either of an upper region and a lower region than a region sandwiched between the two twin planes, and (b) “A”, which represents the maximum local silver iodide content (mol %) in the phase of high silver iodide content, satisfies the relationship: A−6.0≧B, wherein “B” represents local silver iodide content (mol %) in an opposite part to the phase of high silver iodide content.Type: GrantFiled: March 12, 2002Date of Patent: October 14, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Makoto Kikuchi, Genichi Furusawa
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Patent number: 6607874Abstract: A silver halide photographic emulsion, wherein at least 70% of the total projected area of silver halide grains contained therein is occupied by silver bromochloroiodide hexagonal epitaxial tabular grains each having (111) faces as main planes and an epitaxial protrusion portion, wherein the epitaxial protrusion portion exists on at least one apex portion of the hexagon, and, when an average silver chloride content of the epitaxial protrusion portions of all the grains having the epitaxial protrusion portion is expressed as CL mol %, a silver chloride content of each epitaxial protrusion portion of each grain falls within the range of 0.7 CL to 1.3 CL.Type: GrantFiled: September 19, 2001Date of Patent: August 19, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Ihama, Genichi Furusawa
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Publication number: 20030104325Abstract: A silver halide photographic emulsion is disclosed, comprising silver chloroiodide grains or silver chloroiodobromide grains, having 90 mol % or more of a silver chloride content, wherein the silver chloroiodide grains or silver chloroiodobromide grains have a layer having a silver iodide content of decreasing in the depth direction from the grain surface.Type: ApplicationFiled: March 28, 2002Publication date: June 5, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Satoshi Aiba, Osamu Yonekura, Genichi Furusawa, Naoto Ohshima
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Publication number: 20030013051Abstract: A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains meeting the requirements (i) to (iii):Type: ApplicationFiled: March 12, 2002Publication date: January 16, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Makoto Kikuchi, Genichi Furusawa
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Publication number: 20020150847Abstract: A silver halide photographic emulsion comprises silver iodochlorobromide tabular grains each having (111) faces as main planes thereof. 70% or more of the total projected area of all the grains contained in the emulsion is occupied by grains each meeting conditions (i) to (iv): (i) a hexagonal tabular grain whose ratio of the length of an edge having the maximum length with respect to the length of an edge having the minimum length, is 2 or less; (ii) an epitaxial junction portion having a silver chloride content of 5 mol % or more and 25 mol % or less, is provided on at least one apex portion of the hexagon; (iii) a silver chloride content thereof is 0.5 mol % or more and 6 mol % or less; and (iv) a silver iodide content thereof is 0.5 mol % or more and 10 mol % or less.Type: ApplicationFiled: January 3, 2002Publication date: October 17, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Mikio Ihama, Genichi Furusawa
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Publication number: 20020061482Abstract: A silver halide photographic emulsion, wherein at least 70% of the total projected area of silver halide grains contained therein is occupied by silver bromochloroiodide hexagonal epitaxial tabular grains each having (111) faces as main planes and an epitaxial protrusion portion, wherein the epitaxial protrusion portion exists on at least one apex portion of the hexagon, and, when an average silver chloride content of the epitaxial protrusion portions of all the grains having the epitaxial protrusion portion is expressed as CL mol %, a silver chloride content of each epitaxial protrusion portion of each grain falls within the range of 0.7 CL to 1.3 CL.Type: ApplicationFiled: September 19, 2001Publication date: May 23, 2002Inventors: Mikio Ihama, Genichi Furusawa
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Patent number: 5380624Abstract: A novel process is provided for processing a silver halide color photographic material with a color developing solution containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material contains at least one of anti-bacterial agents represented by the general formulas (I), (II), (III), (IV) and (V) and that the processing is effected while said color developing solution is supplied in an amount of 20 to 120 ml per 1 m.sup.2 of said silver halide color photographic material.Type: GrantFiled: September 27, 1993Date of Patent: January 10, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuaki Yoshida, Takatoshi Ishikawa, Yoshihiro Fujita, Genichi Furusawa
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Patent number: 5120637Abstract: A silver halide color photographic material having excellent color reproducibility and image storage stability, which comprises a support having thereon at least one silver halide photographic emulsion layer containing an emulsified dispersion of oleophilic fine particles obtained by dispersing a mixture solution containing at least one cyan coupler represented by formulae (I) or (II) and at least one water-insoluble and organic solvent-soluble polymer; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents hydrogen, an aliphatic group, an aromatic group, a heterocyclic group, an aromatic amino group, a heterocyclic amino group, an aliphatic amino group, an acylamino group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, a ureido group, an aliphatic oxycarbonyl group, an aromatic oxycarbonyl group, an aliphatic oxycarbonylamino group, an aromatic oxycarbonylamino group, a carboxy group, or a cyano group; and X.sub.1 and X.sub.Type: GrantFiled: February 2, 1989Date of Patent: June 9, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Genichi Furusawa, Katsuyoshi Yamakawa
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Patent number: 5110714Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent. In the method a silver halide color photographic material having at least one of the layers of which comprises a silver halide emulsion of high chloride containing 80 mol % or over of silver chloride, and containing at least one coupler having relative coupling rate of 0.05 or over in each color-sensitive layer is processed, after exposure to light, with a color developer containing a specified amount of chloride ions and bromide ions.Type: GrantFiled: October 3, 1989Date of Patent: May 5, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Genichi Furusawa, Yasuhiro Yoshioka, Yasufumi Nakai
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Patent number: 5091297Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide red-sensitive emulsion layer containing at least one cyan coupler represented by formula (I) or (II) ##STR1## wherein Za represents ##STR2## Zb represents ##STR3## Zc represents ##STR4## Y represents a hydrogen atom or a blocking group; X represents a hydrogen atom or a group which releases upon a reaction with an oxidation product or an aromatic primary amine color developing agent; R.sub.11 represents a group which is substantially not released upon reaction with an oxidation product of an aromatic primary amine color developing agent; R.sub.12 represents a hydrogen atom or a substitutent; or R.sub.11, or R.sub.12 or X may form a dimer, oligomer or polymer.The silver halide color photographic material containing the novel cyan coupler is excellent in color reproducibility and image preservability.Type: GrantFiled: June 5, 1990Date of Patent: February 25, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroo Fukunaga, Nobuo Furutachi, Genichi Furusawa