Patents by Inventor Tadao Shishido
Tadao Shishido 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: 4334010Abstract: A silver halide photographic light-sensitive element is described comprising a support having thereon at least one silver halide emulsion layer, wherein at least one compound represented by formula (I) is incorporated in the silver halide emulsion layer or in another hydrophilic colloid layer: ##STR1## wherein X represents a hydroxy group or a group represented by ##STR2## wherein R.sup.2 and R.sup.3 (which may be the same or different) each reprsents hydrogen, an alkyl group, or an aryl group; R.sup.1 represents a sulfur-containing saturated heterocyclic group or a group represented by -A-S-B, wherein A represents an alkylene group and B represents hydrogen, an alkyl group, or an aryl group; and Z represents an atomic group forming a 5-membered or 6-membered unsubstituted or substituted carbocyclic ring.In the silver halide photographic light-sensitive element, the so-called "latent image fading" phenomenon is prevented without accompanying degradation of other photograhic properties.Type: GrantFiled: July 17, 1981Date of Patent: June 8, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Shoji Ishiguro, Tadao Shishido, Yoshiharu Fuseya, Teruaki Tsujikawa
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Patent number: 4334014Abstract: A silver halide photographic light-sensitive element is described containing a cephalosporin compound in its silver halide emulsion layer of substantially the surface latent image type, or in its hydrophilic colloid layer. This light-sensitive element is prevented in the latent image fading.Type: GrantFiled: March 18, 1981Date of Patent: June 8, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Tadao Shishido, Shoji Ishiguro, Jisaburo Ueyanagi
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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: 4309500Abstract: A silver halide color photographic light-sensitive material which contains at least one compound represented by the following general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom or an aliphatic group; R.sup.5 represents an aliphatic group or an aromatic group, R.sup.6 and R.sup.7, which may be the same or different, each represents a cyano group, a --COR.sup.8 group, a --COOR.sup.8 group or a --SO.sub.2 R.sup.9 group; and R.sup.8 represents an aliphatic group and R.sup.9 represents an aliphatic group or an aromatic group. The silver halide color photographic light-sensitive material has improved color reproduction which is not affected by differences in the ultraviolet light absorption characteristics of the camera lens.Type: GrantFiled: May 21, 1979Date of Patent: January 5, 1982Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadao Shishido
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Patent number: 4266018Abstract: A silver halide photographic emulsion chemically sensitized by a sulfur compound of the formula: ##STR1## wherein R.sub.1 represents a 5-membered or 6-membered heterocyclic ring containing a nitrogen atom; R.sub.2 represents a hydrogen atom, a lower alkyl group, an allyl group, an aryl group, or an aralkyl group; and R.sub.3 has the same definition as R.sub.1 or R.sub.2 ; or R.sub.2 and R.sub.3 may join to form a heterocyclic ring; is disclosed.Type: GrantFiled: September 25, 1979Date of Patent: May 5, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Shoji Ishiguro, Tadao Shishido, Takeo Sakai, Noboru Sasaki, Joji Nagaoka, Minoru Matsuki
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Patent number: 4264710Abstract: A photopolymerizable composition is described comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond, (2) a photopolymerization initiator, and (3) a post-exposure polymerization inhibitor compound including a thioureylene group, such as a compound selected from the group consisting of thiourea and thiourea derivatives represented by the general formula (I), thiosemicarbazide and thiosemicarbazide derivatives represented by the general formula (II), and thiosemicarbazone derivatives represented by the general formula (III): ##STR1## wherein: R.sup.1 and R.sup.2, which may be the same or different each represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a substituted alkyl group having from 1 to 6 carbon atoms, a phenyl group, a naphthyl group, a substituted phenyl group or a monovalent group derived from an O-, S- or N-containing 5- or 6-member heterocyclic nucleus,R.sup.Type: GrantFiled: April 2, 1980Date of Patent: April 28, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Syunichi Kondoh, Takeshi Takayama, Akira Umehara, Tadao Shishido, Isamu Itoh
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Patent number: 4232114Abstract: A color photographic light-sensitive element having (1) reduced fog, (2) low reduction in sensitivity and (3) good yellow dye image light fastness, and comprising a support having thereon at least one silver halide photographic emulsion and optionally one or more non-light-sensitive subsidiary layers, wherein a blue-sensitive silver halide photographic emulsion layer and/or a non-light-sensitive layer adjacent thereto contains at least one asymmetrical hydroquinone compound selected from the group consisting of 2-methyl-5-tert-octylhydroquinone, 2-tert-butyl-5-tert- amylhydroquinone, 2-tert-butyl-5-tert-hexylhydroquinone, 2-methyl-5-tert-hexylhydroquinone, 2-methyl-5-tert-amylhydroquinone, 2-methyl-5-(1'-methylcyclohexyl)hydroquinone and precursors thereof wherein either or both hydroxyl groups are modified with an acyl group represented by the formulae: ##STR1## wherein R represents an alkyl group.Type: GrantFiled: September 1, 1978Date of Patent: November 4, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiichi Adachi, Tadao Shishido, Akio Mitsui
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Patent number: 4216284Abstract: A color photographic light-sensitive material which comprises a support having coated thereon at least one light-sensitive silver halide emulsion layer containing a yellow dye-forming coupler, at least one light-sensitive silver halide emulsion layer containing a cyan dye-forming coupler, at least one light-sensitive silver halide emulsion layer containing a magenta dye-forming coupler and at least one light-sensitive silver halide emulsion layer containing at least one non-diffusible silver bleach inhibitor selected from the group consisting of a nitrogen-containing heterocyclic compound having a thioether bond and a heterocyclic compound containing one or more nitrogen atoms which combine with a group containing 11 or more carbon atoms to form a quaternary salt, in combination with one or more heterocyclic thione compounds having a thione group which is not capable of forming a mercaptan.Type: GrantFiled: September 29, 1977Date of Patent: August 5, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadao Sakai, Masayoshi Kawai, Tadao Shishido
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Patent number: 4200464Abstract: Silver halide color photographic sensitive materials which contain at least one compound represented by the following formulae (I) or (II): ##STR1## wherein R represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms and R.sub.1 and R.sub.2 each represents an alkyl group having 1 to 20 carbon atoms, wherein R.sub.1 and R.sub.2 may be the same as or different from each other, and the sum total of carbon atoms of R.sub.1 and R.sub.2 is 5 or more.Type: GrantFiled: February 10, 1978Date of Patent: April 29, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadao Shishido, Naoki Arai
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Patent number: 4199360Abstract: A method of spectrally sensitizing a photographic light-sensitive emulsion where a water-soluble solution, prepared by dissolving a methine dye having at least one water-soluble group in water in the presence of a "Red Shift Compound", as hereinafter defined, is added to a photographic light-sensitive emulsion to provide a photographic light-sensitive emulsion spectrally sensitized with increased sensitizing efficiency and with reduced fog. The disadvantages caused by the use of high organic solvent contents are avoided and photographic light-sensitive emulsions suitable for high-speed coating are obtained.Type: GrantFiled: July 21, 1978Date of Patent: April 22, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Masanao Hinata, Yuji Mihara, Tadao Shishido, Keiichi Adachi
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Patent number: 4170480Abstract: A thermally developable light-sensitive material comprising a support having therein or in at least one layer thereon (a) an organic silver salt, (b) a photocatalyst, and (c) a reducing agent, and additionally (d) at least one 1,2,4-triazole compound.Type: GrantFiled: September 7, 1977Date of Patent: October 9, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinpei Ikenoue, Takao Masuda, Harumi Katsuyama, Nobuyoshi Sekikawa, Tadao Shishido, Nobuo Sakai
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Patent number: 4166742Abstract: A silver halide photographic light-sensitive material containing at least one negative image silver halide photographic emulsion layer comprising silver halide grains that have an average grain size of not more than about 0.7 .mu. and are substantially of the surface latent image type and containing a binder in an amount of not more than about 250 g per mol of silver halide, and containing a compound represented by the following general formula (I):r.sup.1 nhnhcor.sup.2 (i)wherein R.sup.1 represents an aryl group; and R.sup.2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms; in at least one of the hydrophilic colloid layers, and a compound represented by the following general formula (II) or (III): ##STR1## wherein Y represents a sulfur atom, a selenium atom, an oxygen atom, a nitrogen atom or a divalent residue; --NR.sup.4 --, wherein R.sup.Type: GrantFiled: October 13, 1977Date of Patent: September 4, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Shunji Takada, Yoshitaka Akimura, Tadao Shishido
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Patent number: 4144071Abstract: A silver halide photographic light-sensitive material having improved image quality which comprises at least one hydrophilic colloid layer containing at least one reducing compound, preferably having an oxidation potential less than about 1.Type: GrantFiled: February 28, 1977Date of Patent: March 13, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Toshiaki Aono, Takeshi Hirose, Tadao Shishido
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Patent number: 4138266Abstract: A method of spectrally sensitizing a photographic light-sensitive emulsion where a water-soluble solution, prepared by dissolving a methine dye having at least one water-soluble group in water in the presence of a "Red Shift Compound", as hereinafter defined, is added to a photographic light-sensitive emulsion to provide a photographic light-sensitive emulsion spectrally sensitized with increased sensitizing efficiency and with reduced fog. The disadvantages caused by the use of high organic solvent contents are avoided and photographic light-sensitive emulsions suitable for high-speed coating are obtained.Type: GrantFiled: February 3, 1977Date of Patent: February 6, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Masanao Hinata, Yuji Mihara, Tadao Shishido, Keiichi Adachi
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Patent number: 4138259Abstract: A color photographic silver halide light-sensitive material capable of providing color images having excellent fastness and free from discoloration at the non-image areas comprising a support having thereon a silver halide photographic emulsion layer having a dye image providing material associated therewith and with the light-sensitive material containing at least one compound represented by the following general formula (I) or a precursor thereof: ##STR1## wherein R and R', which may be the same or different, each represents ##STR2## and at least one phenolic compound having an ether bond at the 4-position thereof.Type: GrantFiled: October 28, 1977Date of Patent: February 6, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiichi Adachi, Tadao Shishido, Hiroshi Hara, Shigeo Hirano
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Patent number: 4113495Abstract: A color photographic light-sensitive material containing a coupler therein and, in at least one photographic layer, a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or an --X--Y group wherein X represents a carbonyl group or a sulfonyl group, and Y represents a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, an aryl group, an aralkyl group, an alkoxy group containing a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, an aryloxy group, an aralkoxy group, a straight chain, branched chain or cyclic alkoxycarbonyl group having 2 to 20 carbon atoms, an aryloxycarbonyl group or an aralkoxycarbonyl group; and R.sub.2, R.sub.3 and R.sub.Type: GrantFiled: June 13, 1977Date of Patent: September 12, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadao Shishido, Hiroshi Hara, Atsuaki Arai
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Patent number: 4113488Abstract: A method for improving the light fastness of a magenta color image in a silver halide color photograph which comprises incorporating into a layer containing a magenta color image, which is formed upon reaction of a magenta coupler and an oxidation product of an aromatic primary amine color developing agent, at least one light fastness improving phenolic compound and at least one synergistic light fastness improving agent selected from a sulfide or sulfoxide compound represented by the following general formula (V):x--b--y (v)wherein B represents --S-- or --SO--; X and Y, which may be the same or different, each represents --(CH.sub.2).sub.n --R.sub.1, ##STR1## or ##STR2## and R.sub.1 represents --COOR.sub.3, ##STR3## --OR.sub.6, --O--COR.sub.6, --NHSO.sub.2 R.sub.6, ##STR4## --NHCOR.sub.6, a cyano group, an aryl group or a hydroxy group; R.sub.2 represents an alkyl group of 1 to 30 carbon atoms, an aryl group, an aralkyl group, a hydroxy group, a cyano group or --COOR.sub.3 ; R.sub.3 R.sub.4, R.sub.5 and R.Type: GrantFiled: May 13, 1976Date of Patent: September 12, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Yamada, Tadao Shishido, Atsuaki Arai
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Patent number: 4105452Abstract: A multi-layered color photographic light-sensitive material which comprises a support having thereon at least two light-sensitive silver halide emulsion layers which provide images having substantially different hues, with the light-sensitive material including 2-equivalent couplers and/or 4-equivalent anilinopyrazolone couplers and at least one of the light-sensitive silver halide emulsion layers or a colloidal layer of the light-sensitive material containing a hydroquinone derivative or a hydroquinone precursor substituted with a heterocyclic monothio group and an aliphatic monothio group, an aryl monothio group, an aliphatic oxy group, an aryloxy group or a heterocyclic oxy group and having a ballasting group containing 8 or more carbon atoms.Type: GrantFiled: April 2, 1976Date of Patent: August 8, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Toshiaki Aono, Seiiti Kubodera, Takeshi Hirose, Reiichi Ohi, Tadao Shishido
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Patent number: 4095984Abstract: A photographic coupler capable of releasing a development inhibitor upon reaction with an oxidation product of a color developing agent and represented by the following general formula (I) or (II) ##STR1## wherein A represents a coupler residue; Z represents a sulfur atom, a selenium atom or an oxygen atom; R.sup.1 represents an aliphatic group; R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom, an aliphatic group, an alkoxy group, a hydroxy group, or an aromatic group, and R.sup.2 and R.sup.3 can combine and represent the atoms necessary to form a benzene ring or a naphthalene ring, ##STR2## wherein A represents a coupler residue; R.sup.4 represents an aliphatic group or an aromatic group; and R.sup.5 and R.sup.6 which may be the same or different, each represents a hydrogen atom, an aliphatic group or an aromatic group; and silver halide photographic elements containing these photographic couplers.Type: GrantFiled: December 29, 1976Date of Patent: June 20, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Tohru Sueyoshi, Nobuo Furtachi, Akio Okumura, Tadao Shishido
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Patent number: 4094683Abstract: A direct positive silver halide light-sensitive material capable of forming direct positive images comprising a support having coated thereon at least one internal image type silver halide emulsion layer, wherein at least one hydrophilic colloid layer contains a heterocyclic quaternary salt compound represented by formula (I) in an amount necessary to provide the silver halide photographic emulsion with a fogging function. ##STR1## wherein Z is an atomic group necessary for completing a 5- or 6-membered heterocyclic nucleus, R.sub.1 is an aliphatic group, R.sub.2 is a hydrazonoalkyl group, X.crclbar. is an anion, and n is 1 or 2.Type: GrantFiled: June 28, 1976Date of Patent: June 13, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuyuki Tsujino, Akira Ogawa, Tadao Shishido, Keiichi Adachi