Patents by Inventor Satoshi Hoshi
Satoshi Hoshi 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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Silver halide light-sensitive material comprising support, hardening layer and light-sensitive layer
Patent number: 6132925Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer in order. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. The hardening layer contains a mixture of a polymer (A) and a polymer (B). The mixture contains the polymer (A) in an amount of 5 to 70 wt. % and the polymer (B) in an amount of 30 to 95 wt. %. The polymer (A) comprises repeating units of (A1) in an amount of not less than 95 mol %. The polymer (B) comprises repeating units of (B1) in an amount of 10 to 90 mol % and repeating units of (B2) in an amount of 10 to 90 mol %.Type: GrantFiled: February 29, 2000Date of Patent: October 17, 2000Assignee: Fuji Photo Film Co., Ltd.Inventor: Satoshi Hoshi -
Silver halide light-sensitive material comprising support, hardening layer and light-sensitive layer
Patent number: 5998086Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound and a hydrophobic polymer. The light-sensitive layer contains silver halide and a water-soluble polymer. The water-soluble polymer forms a water-soluble phase. The silver halide is dispersed in the water-soluble phase. The hardening layer or the light-sensitive layer contains a reducing agent. The light-sensitive layer further contains a water-insoluble polymer. The water-soluble polymer has a glass transition temperature of not higher than 0.degree. C. The water-insoluble polymer forms a water-insoluble phase. The water-insoluble phase is separated from the water-soluble phase.Type: GrantFiled: August 19, 1998Date of Patent: December 7, 1999Assignee: Fuji Photo Film Co., Ltd.Inventor: Satoshi Hoshi -
Silver halide light-sensitive material comprising support, hardening layer and light-sensitive layer
Patent number: 5882838Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound or an ethylenically unsaturated cross-linkable polymer. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or the light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 50 mol %: ##STR1## in which each of n1 and n2 is an integer of 10 to 5,000; each of R.sup.1 and R.sup.2 is hydrogen, an alkyl group or an aryl group; X is --O--R.sup.4 --O-- or --NR.sup.5 --; R.sup.4 is an alkylene group, an alkyleneoxyalkylene group, an arylene group or an aralkylene group; R.sup.Type: GrantFiled: October 3, 1997Date of Patent: March 16, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Hoshi, Hiroyuki Nagase -
Patent number: 5856062Abstract: A light-sensitive material comprises a light-sensitive hardening layer provided on a support. The light-sensitive hardening layer contains silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound or an ethylenically unsaturated cross-linkable polymer. The light-sensitive hardening layer further contains a coupling agent in an amount of 0.01 to 15 wt. %.Type: GrantFiled: April 18, 1996Date of Patent: January 5, 1999Assignee: Fuji Photo Film Co., Ltd.Inventor: Satoshi Hoshi
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Silver halide light-sensitive material comprising support, hardening layer and light-sensitive layer
Patent number: 5843619Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound and a hydrophobic polymer having an acidic group. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or a light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 10 mol %: ##STR1## in which each of R.sup.1 and R.sup.2 independently is hydrogen, an aliphatic group or an aromatic group.Type: GrantFiled: September 19, 1997Date of Patent: December 1, 1998Assignee: Fuji Photo Film Co., Ltd.Inventor: Satoshi Hoshi -
Patent number: 5830630Abstract: A light-sensitive sheet comprises an aluminum alloy support and a light-sensitive layer. The aluminum alloy support contains grains of secondary phase. The maximum grain size of the grains of secondary phase essentially is less than 5 .mu.m. Silver halide light-sensitive materials having the aluminum alloy support are also disclosed.Type: GrantFiled: October 23, 1996Date of Patent: November 3, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Hoshi, Hirokazu Sakaki, Yoshinori Hotta
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Patent number: 5521039Abstract: An electrophotographic photosensitive material comprising a conductive support having thereon (a) a layer containing a charge transporting compound and a charge generating compound or (b) a combination of a layer containing a charge transporting compound and a layer containing a charge generating compound, wherein a novel disazo compound is contained as the charge generating compound, and a printing plate for electrophotographic process, which is prepared by subjecting an electrophotographic photosensitive material comprising a conductive support having thereon a photoconductive layer containing at least a charge generating material, a charge transporting material and a binder resin to an imagewise exposure and a development to form a toner image, and by removing a non-image area of the photoconductive layer other than the toner image area thereof, wherein at least one charge generating material is a novel disazo compound.Type: GrantFiled: November 30, 1994Date of Patent: May 28, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Hoshi, Naonori Makino, Katsuji Kitatani
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Patent number: 5518846Abstract: A novel electrophotographic photoreceptor is provided, comprising on an electrically conductive support a light-sensitive layer containing at least one acetylene disazo compound represented by the general formula (I):Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--Ar.sup.2 N.dbd.N--Cp (I)wherein Ar.sup.1 and Ar.sup.2 each represents an unsubstituted or substituted arylene group, divalent condensed polycyclic aromatic group or divalent aromatic heterocyclic group, with the proviso that Ar.sup.1 and Ar.sup.2 are not phenylene groups at the same time; and Cp represents a coupler residue.Type: GrantFiled: May 1, 1991Date of Patent: May 21, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Hoshi, Naonori Makino, Katsuji Kitatani
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Patent number: 5393651Abstract: A silver halide light-sensitive material is disclosed. The light-sensitive material comprises an aluminum support, an anodic oxide layer and a light-sensitive polymerizable layer in the order. The light-sensitive polymerizable layer contains silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound or a cross-linkable polymer. According to the present invention, an intervening layer is further provided between the anodic oxide layer and the light-sensitive polymerizable layer. The intervening layer contains a compound having a metal cation or a metal oxide anion. The metal cation or the metal oxide anion has a standard electrode potential of 0 V or more.Type: GrantFiled: July 8, 1994Date of Patent: February 28, 1995Assignee: Fuji Photo Film Co., Ltd.Inventor: Satoshi Hoshi
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Patent number: 5106712Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge carrier-transporting compound and a charge carrier-generating compound or a charge carrier-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said charge carrier-generating compound there is contained a novel bisazo compound represented by the general formula (1-A), (1-B) or (1-C):Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--.sub.n Ar.sup.2 --N.dbd.N--Cp (1-A)wherein Ar.sup.1 and Ar.sup.2 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent heterocyclic aromatic group; Cp represents a coupler residue; and n represents an integer 2 or 3;Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--Ar.sup.2 --C.tbd.C--Ar.sup.3 --C.tbd.C--Ar.sup.4 --N.dbd.N--Cp (1-B)wherein Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.Type: GrantFiled: July 6, 1990Date of Patent: April 21, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Naonori Makino, Satoshi Hoshi
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Patent number: 5093219Abstract: A novel electrophotographic photoreceptor is provided comprising a light-sensitive layer containing at least one of acetylene compounds represented by general formula (I) provided on an electrically conductive support:Ar.sup.1 C.tbd.C--AR.sup.3 --C.tbd.C--AR.sup.2 (I)wherein Ar.sup.1 and Ar.sup.2 each represents an aromatic carbon ring or aromatic heterocyclic group; and Ar.sup.3 represents an arylene group, divalent condensed polycyclic aromatic group or divalent aromatic heterocyclic group.Type: GrantFiled: August 17, 1990Date of Patent: March 3, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Katsugi Kitatani
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Patent number: 5073465Abstract: An novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, wherein said charge-generating compound is a trisazo compound represented by the general formula (1): ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5 and Ar.sup.6 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent group derived from a monocyclic or condensed polycyclic heterocyclic aromatic group, each of which may have one or more substituents; C.sub.p respresents a coupler residual group; and n represents 1 or 2.Type: GrantFiled: May 18, 1990Date of Patent: December 17, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Shigeru Ohno, Katsuji Kitatani
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Patent number: 5053302Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said electric charge-generating compound there is contained an azo compound containing an organic residue represented by general formula (1): ##STR1## wherein Ar.sup.2 represents a divalent aromatic hydrocarbon or aromatic heterocyclic group; Ar.sup.3 represents an aromatic hydrocarbon group or aromatic heterocyclic group; and Q represents a hydrogen atom, halogen atom, alkyl group, trifluoromethyl group, nitro group, cyano group or alkoxy group. In a preferred embodiment, the azo compound is represented by the general formula (2): ##STR2## wherein Ar.sup.1 represents an aromatic hydrocarbon group or aromatic heterocyclic group which may be connected thereto via a connecting group; Ar.sup.2 and Ar.sup.Type: GrantFiled: May 15, 1990Date of Patent: October 1, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Katsuji Kitatani
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Patent number: 5019474Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said electric charge-generating compound there is contained a tetrakisazo compound represented by the general formula (1): ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5, Ar.sup.6 and Ar.sup.7 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent heterocyclic aromatic group; and Cp represents a coupler residue.Type: GrantFiled: April 4, 1990Date of Patent: May 28, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Shigeru Ohno, Satoshi Hoshi, Katsuji Kitatani
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Patent number: 4985324Abstract: An electrophotographic photoreceptor comprising an electroconductive support having thereon a layer containing a charge carrier-transporting compound and a charge carrier-generating compound or having thereon a layer containing a charge carrier-transporting compound and a layer containing a charge carrier-generating compound, wherein the photoreceptor contains a tetrakisazo compound of the following formula (I) as the charge carrier-generating compound: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4, Ar.sub.5 and Ar.sub.6, which may be the same or different, each represents an arylene group, a divalent condensed polycyclic aromatic group or a divalent heterocyclic aromatic group;A represents ##STR2## X represents an atomic group necessary to form an aromatic ring or heterocyclic ring condensed with the benzene ring of the formula having the hydroxyl group and Y bonded thereto;Y represents ##STR3## R.sup.1 represents an alkyl group or a phenyl group; R.sup.Type: GrantFiled: October 16, 1989Date of Patent: January 15, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsuji Kitatani, Naonori Makino, Satoshi Hoshi, Hideo Sato, Shigeru Ohno
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Patent number: 4977051Abstract: An electrophotographic photoreceptor is disclosed, which comprises an electrically conductive support having thereon a layer which contains a charge carrier transporting compound and a charge carrier generating compound, or a layer which contains charge carrier transporting compound and a layer which contains a charge generating compound, wherein at least one type of tris-azo compound represented by formula (I) is included as a charge carrier generating compound: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and A are as defined in the specification.Type: GrantFiled: November 8, 1989Date of Patent: December 11, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Ohno, Katsuji Kitatani, Naonori Makino, Satoshi Hoshi, Hideo Sato
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Patent number: 4948688Abstract: An electrophotographic photoreceptor comprising: (1) an electrophotographic photosensitive layer which comprises a charge carrier transporting compound and a charge carrier generating compound, or (2) an electrophotographic photosensitive layer which comprises a charge carrier transporting compound layer and a charge carrier generating compound layer, on an electrically conductive support, wherein said charge carrier generating compound is a bis-azo compound represented by formula (I): ##STR1## wherein, Ar.sup.1, Ar.sup.2, Ar.sup.5 and Ar.sup.6 represent aryl groups, Ar.sup.3 and Ar.sup.4 represent arylene groups, and R.sup.1 represents a hydrogen atom or an SO.sub.3 Na group.Type: GrantFiled: April 3, 1989Date of Patent: August 14, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsuji Kitatani, Satoshi Hoshi
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Patent number: 4882249Abstract: Disclosed are a photoconductive composition containing a new tetrakisazo compound of the following formula (1) and an electrophotographic photoreceptor having a photosensitive layer which contains the tetrakisazo compound of the formula (1): ##STR1## wherein R.sup.11, R.sup.12, A, Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5, and Ar.sup.6 are defined hereinbefore. The electrophotographic photoreceptor has both high sensitivity and high durability, and the sensitivity thereof is barely lowered even after repeated use.Type: GrantFiled: September 12, 1988Date of Patent: November 21, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Satoshi Hoshi
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Patent number: 4871637Abstract: Disclosed are a photoconductive composition containing a new bisazo compound of the following formula (1) and an electrophotographic photoreceptor having a photosensitive layer which contains the bisazo compound of the formula (1): ##STR1## wherein Z, B.sub.1, B.sub.2, A, and L are defined hereinafter. The electrophotographic photoreceptor has both high sensitivity and high durability, and the sensitivity thereof is barely lowered even after repeated use.Type: GrantFiled: September 19, 1988Date of Patent: October 3, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Satoshi Hoshi