Patents by Inventor Takayoshi Kamio

Takayoshi Kamio 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).

  • Patent number: 6458194
    Abstract: A dye compound excellent in transfer property and color fastness against light, a yellow dye excellent in light absorption property, a yellow dye compound for thermal transfer dye donating material excellent in solubility and a dye compound which can be synthesized with ease from readily-available source materials are provided. A dye compound of the present invention is expressed by the general formula (1): or a salt thereof, wherein R1, R2, R3 and R4 independently represent a hydrogen atom or a substituent.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: October 1, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Mikoshiba, Takayoshi Kamio
  • Patent number: 6444020
    Abstract: Disclosed are an azo dye having the following formula (1), an ink-jet ink comprising the aforesaid azo dye, an ink-jet recording method using the aforesaid ink-jet ink, and a thermal transfer recording material comprising the aforesaid azo dye: wherein Z represents an atomic group which forms, together with a nitrogen atom, a five-, six- or seven-membered ring, R1 represents a hydrogen atom, an oxy radical, an aliphatic group, an aliphatic oxy group, an acyl group, an aliphatic oxycarbonyl group, an aryloxycarbonyl group or an acyloxy group, R2, R3, R4 and R5, which may be the same or different, each represents an alkyl group, or R2 and R3 and/or R4 and R5 may be combined with each other to form a ring, and Dye represents a dye moiety group necessary for forming an azo dye.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: September 3, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Takayoshi Kamio
  • Patent number: 6399712
    Abstract: A polymer compound is provided comprising at least one of the monomer units represented by the following formula (A) or formula (B): wherein R11 and R21 each represents a hydrogen atom, an oxy radical group, an alkyl group, an alkenyl group, an alkoxy group or an acyl group; R12 and R22 each represents a hydrogen atom or an alkyl group; Y1 and Y2 each represents ←CONR4—, ←COO— or ←CH(OH)CH2O—; X− represents a chlorine ion, a bromine ion, an iodine ion or a hydroxy ion; Z represents an atom group which together with the nitrogen atom forms a 5- to 7-membered heteroring; R13 and R23 each represents a hydrogen atom, a methyl group, an ethyl group or a halogen atom; R4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and ← represents a bond to the main chain side of the polymer.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: June 4, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Takayoshi Kamio
  • Patent number: 6232469
    Abstract: A novel 4-acylamino-2,2,6,6-tetramethylpiperidine derivatives and antioxidants comprising the same. The 4-acylamino-2,2,6,6-tetramethylpiperidine derivatives are represented by formula (A): wherein R1 represents a hydrogen atom, a hydroxyl group, an oxyradical group, an aliphatic group, an acyl group, an aliphatic oxy group or an acyloxy group; and R2 represents an aliphatic group having at least 3 carbon atoms and at least two hydroxyl groups.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: May 15, 2001
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Takayoshi Kamio
  • Patent number: 6200370
    Abstract: A jet printing ink contains an azo dye of the formula (I): wherein X1 is ═N— or ═CR4—; Y1 is —N═ or —CR5═; Z1 is —S—, —NR6— or —N═CR7— in which the right end of each group connects to Y1; the benzene ring A can have a substituent; each of R1, R2 and R6 is hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, or an aryl group (each group possibly has one or more substituens); each of R3, R4, R5 and R7 is hydrogen, a halogen atom, cyano, hydroxyl, nitro, carboxyl, sulfo, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group, an alkylthio group, an acyl group, an acyloxy group, an alkoxycarbonyl group, an alkylamino group, an arylamino group, or an alkylsufonyl group; or a set of R1 and R2, R1 and the substituent of the benzene ring A, R2 and the substituent of the benzene ring A, R3 and R4, R4 and R5, or R5 and R6 can be combined to form a heterocyclic or aromatic ring
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: March 13, 2001
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiki Fujiwara, Takayoshi Kamio
  • Patent number: 6124084
    Abstract: A silver halide photographic light-sensitive material comprising a support having provided thereon a layer containing at least one cyan dye image forming compound represented by the following formula (1):(Dye-X).sub.1 --Y (1)wherein Dye, X, Y and q are as defined in the specification. The silver halide photographic light-sensitive material containing the cyan dye image forming compound according to the present invention provides a cyan color image excellent in fastness to light, humidity and heat.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: September 26, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiichi Tateishi, Takayoshi Kamio, Tetsu Kamosaki, Yasuhiro Ishiwata, Hideaki Naruse
  • Patent number: 6010819
    Abstract: A method for improving light fastness of an image, which comprises releasing or forming an image forming dye or a precursor thereof corresponding or counter-corresponding to silver development and allowing an image formed by transferring said image forming dye or precursor thereof to coexist with a compound represented by general formula (I) in an image forming material ##STR1## The symbols in formula (I) are defined in the description. Also disclosed is an image forming material for use in the method.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: January 4, 2000
    Assignee: Fuji Photo Film., Ltd.
    Inventors: Hiroshi Arakatsu, Nobuo Seto, Yoshisada Nakamura, Hironori Hiyoshi, Hiroyuki Watanabe, Takayoshi Kamio
  • Patent number: 5731140
    Abstract: A pyrazolylazophenol dye exhibiting excellent spectral characteristics and having high fastness to light, heat, air or chemicals, and a color light-sensitive material containing an image forming compound comprising the dye, which releases a magenta dye exhibiting excellent spectral characteristics and having high fastness to light, heat, air or chemicals.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: March 24, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takayoshi Kamio, Nobuo Seto, Hironori Hiyoshi
  • Patent number: 5643709
    Abstract: A thermal transfer recording material capable of giving a color image having an excellent color reproducibility as well as good light fastness and free from fading, bleeding and contamination of an article contacted is provided. The thermal transfer recording material comprises a thermal transfer dye donating material containing the specified thermally migratable, dissociative heteryl azo dye of phenol or naphthol type and an image receiving material for thermal transfer printing, containing at least one of basic materials and mordants as a dye receiving compound.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: July 1, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takayoshi Kamio, Yasuhiro Ishiwata, Tomomi Tateishi
  • Patent number: 5449598
    Abstract: A silver halide color photographic material is disclosed, which comprises a support having provided thereon at least one hydrophilic colloidal layer, wherein the hydrophilic colloidal layer contains a novel coupler compound having a high dye forming rate and a high color density represented by general formula (I):(R.sup.1 COCHXCONR.sup.2 R.sup.3)--(CONHSO.sub.2 R.sup.4).sub.n(I)wherein R.sup.1 represents an alkyl group, an aryl group, a heterocyclic group, --NR.sup.5 R.sup.6 or --OR.sup.7 ; R.sup.2 and R.sup.3 each independently represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sup.4 represents an alkyl group, aryl group, heterocyclic group or --NR.sup.8 R.sup.9 ; R.sup.5, R.sup.6, R.sup.8 and R.sup.9 each independently represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sup.7 represents an alkyl group, an aryl group or a heterocyclic group; X represents a group capable of being released as an anion (X.sup.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: September 12, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naoki Saito, Seiji Ichijima, Masuji Motoki, Takayoshi Kamio, Keiji Mihayashi
  • Patent number: 5338654
    Abstract: A silver halide color photographic material containing at least one coupler compound of the formula (1) in at least one hydrophilic colloid layer which is provided on a support:R.sup.1 OCOCHXCONR.sup.2 R.sup.3 (1)where R.sup.1 represents a branched alkyl group including a cyclic alkyl group and a cyclic alkyl-substituted alkyl group, an aryl group or a heterocyclic group; R.sup.2 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sup.3 represents an alkyl group, an aryl group or a heterocyclic group; X represents a group which splits off from the coupler compound when the coupler compound is reacted with an oxidation product of an aromatic primary amine developing agent; and R.sup.2 and R.sup.3 may be bonded to each other to form a ring. The coupler has a high dye-forming rate to give a dye having a high color density and a high color fastness. The material has improved sharpness and color fastness and an elevated sensitivity.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: August 16, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naoki Saito, Takayoshi Kamio, Seiji Ichijima, Keiji Mihayashi
  • Patent number: 5306609
    Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the silver halide color photographic material comprises i) a nondiffusive coupler represented by the general formula (I) or (II): ##STR1## and ii) an acyl acetamide coupler comprising, as an acyl group, a group represented by the general formula (A) ##STR2## The silver halide color photographic material provides a high color density and exhibits a small fluctuation of photographic performance during preservation thereof and improved color image fastness and color reproducibility.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: April 26, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Takayoshi Kamio
  • Patent number: 5302503
    Abstract: A silver halide color photographic light-sensitive material includes a support and at least one hydrophilic colloid layer formed on the support. The hydrophilic layer contains a coupler compound which is represented by formula (I) below and has a high dye formation rate and a high color forming density. This silver halide color photographic light-sensitive material can achieve an improved sharpness and a high sensitivity:A--(SO.sub.2 NHCONR.sup.1 R.sup.2).sub.n Formula (I)(wherein A represents a coupler moiety, each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group, and n represents an integer of 1 or more, if n being an integer of 2 or more, respective R.sup.1 's and R.sup.2 's being able to be the same or different, and A and R.sup.1, A and R.sup.2, or R.sup.1 and R.sup.2 being able to combine to form a ring.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: April 12, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naoki Saito, Keiji Mihayashi, Takayoshi Kamio
  • Patent number: 5266456
    Abstract: Disclosed is a silver halide color photographic material containing a silver halide emulsion having a high silver iodide content and containing a novel yellow colored cyan coupler. The material has a high sensitivity, a good graininess, an excellent color reproducibility and a sufficient sharpness. The material has at least one light-sensitive emulsion layer on a support and is characterized in that it contains at least one yellow colored cyan coupler, that the emulsion layer contains chemically sensitized silver halide grains, and that the chemically sensitized silver halide grain in the emulsion has a silver iodobromide phase with a silver iodide content of from 15 to 45 mol % as a distinctly layered structure and has a silver iodide content of more than 7 mol % based on the whole grain.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: November 30, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Takayoshi Kamio
  • Patent number: 5214141
    Abstract: The present invention relates to an azomethine compound represented by formula (I): ##STR1## wherein X represents a 5- or 6-membered cyclic amino group, R represents an aromatic group, and Ar represents an aromatic group having an aliphatic amino group in the para-position. The azomethine compounds disclosed are useful yellow dyes for photography, for various optical filters, for ink jet, for heat transfer printing, and for printing.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: May 25, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masuji Motoki, Naoki Saito, Takayoshi Kamio, Mitsugu Tanaka, Seiji Ichijima
  • Patent number: 5213958
    Abstract: A silver halide color photographic photosensitive material comprising a yellow image forming photographic coupler, which is capable of forming images having excellent color reproduction and image fastness, and which has a high reactivity with an oxidized form of a developing agent. The aforementioned object has been realized by means of a silver halide color photographic photosensitive material containing a coupler represented by general formula (I): ##STR1## wherein X represents an organic residual group which is required, together with the nitrogen atom, to form a nitrogen containing heterocyclic ring, Y represents an aromatic group or a heterocyclic group, and Z represents a group which is eliminated when the coupler represented by said general formula reacts with the oxidized form of a developing agent.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: May 25, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masuji Motoki, Seiji Ichijima, Naoki Saito, Takayoshi Kamio, Keiji Mihayashi
  • Patent number: 5112730
    Abstract: A silver halide color photographic material comprises a support having thereon at least one silver halide emulsion layer and at least one cyan coupler which can release a water-soluble compound residual group which contains a 2-acyaminophenylazo group or 2-sulfonamidophenylazo group via a coupling reaction with an oxidation product of a primary aromatic amine developing agent.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: May 12, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Atsuhiro Ohkawa, Takayoshi Kamio, Masuzi Motoki, Keiji Mihayashi
  • Patent number: 4910128
    Abstract: A silver halide color photographic material comprising as a cyan-dye-forming coupler a compound represented by of formula (I) ##STR1## wherein R.sub.1 represents a ballast group imparting diffusion fastness to the coupler of formula (I) and a cyan dye formed from said coupler; X represents a hydrogen atom or a group represented by --R, --OR, --SR, ##STR2## --COR, --COOR, --SO.sub.2 R, --SO.sub.2 OR, ##STR3## or --OCOR; Y represents a halogen atom, a cyano group, a trifluoromethyl group, a nitro group, or a group represented by --R, --OR, --SR, --COR, --COOR, --SO.sub.2 R, --SO.sub.2 OR, ##STR4## m and n each represents an integer of 1 to 5, and when m or n is more than 1, the X or Y, respectively, are the same or different; R represents an aliphatic group, an aromatic group, or a heterocyclic group, and R' and R" each represents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group; with the proviso that the total number of carbon atoms in the substituent (X).sub.m is 4 or more.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: March 20, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takayoshi Kamio, Katsuyoshi Yamakawa, Hidetoshi Kobayashi, Isamu Itoh
  • Patent number: 4774172
    Abstract: Silver halide color photographic materials are described, which comprise at least one silver halide emulsion layer coated on a support and which are characterized by the incorporation of a pyrazoloazole type coupler of the following general formula (I) into the silver halide emulsion layer(s) or the adjacent layer(s) thereto: ##STR1## wherein Za and Zb each may represent ##STR2## R.sup.1 and R.sup.2 each may represent a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being removed upon a coupling reaction with an oxidized form of an aromatic primary amine type developing agent; when Za.dbd.Zb is a carbon-carbon double bond, this may be a part of the aromatic ring in the formula: with the proviso that at least one of R.sup.1 and R.sup.2 is a group represented by general formulae (II) or (III): ##STR3## wherein R.sup.3 represents a hydrogen atom or a substituted or unsubstituted alkyl group; R.sup.4 represents a hydrogen atom or a substituent; R.sup.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: September 27, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Kawagishi, Takayoshi Kamio, Keizo Kimura, Tadahisa Sato, Nobuo Furutachi
  • Patent number: 4587210
    Abstract: A color photographic silver halide light-sensitive material is described, characterized by containing at least one of the compounds represented by the general formula (I) and their precursors. ##STR1## wherein R represents ##STR2## (wherein R.sub.1 and R.sub.2 are each a hydrogen atom or an alkyl group and may combine with R.sub.3 to form a ring having 5 to 10 carbon atoms, provided that R.sub.1 and R.sub.2 are not hydrogen atoms at the same time, R.sub.3 is a substituted or unsubstituted aryl group, and n is an integer of 1 to 4), and R' has 1 to 20 carbon atoms and represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituent defined by R as defined above). This light-sensitive material provides color images which are stabilized, i.e., freed of fading and the discoloration of the white ground.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: May 6, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Michio Ono, Masakazu Morigaki, Takayoshi Kamio, Kozo Aoki, Kazuhiko Furuya