Patents by Inventor Kuniaki Fujimoto
Kuniaki Fujimoto 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: 11949220Abstract: In a block (10) for a cable of the present disclosure, the block has a shape of a rectangular cuboid in which an upper surface (11) and a bottom surface have square shapes, the block has plural bending through holes (21) between one side surface of the rectangular cuboid and a side surface (12) neighboring the one side surface, arrangement of open ends (22) of the plural through holes in the one side surface of the rectangular cuboid is in a lattice manner, the arrangement of the open ends is in line symmetry with respect to a middle line (31) between an upper side and a bottom side of the one side surface and with respect to a middle line (32) between a lateral side and a lateral side of the one side surface, and arrangement of open ends (22) of the plural through holes in the side surface neighboring the one side surface of the rectangular cuboid is the same as the arrangement of the open ends (22) of the plural through holes in the one side surface of the rectangular cuboid.Type: GrantFiled: September 2, 2019Date of Patent: April 2, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kuniaki Terakawa, Tomohiro Kawano, Tatsuya Fujimoto, Kazunori Katayama, Tomomi Nagao
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Patent number: 11702556Abstract: Provided is an aqueous ink that excels in a hue as a yellow ink, and capable of recording an image that excels both in color developability and light fastness. The aqueous ink is an ink for inkjet, containing a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2).Type: GrantFiled: November 9, 2020Date of Patent: July 18, 2023Assignee: Canon Kabushiki KaishaInventors: Yasuaki Murai, Kuniaki Fujimoto, Saki Tasaki
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Publication number: 20230183502Abstract: Provided is an aqueous ink for ink jet containing a pigment and a resin particle that disperses the pigment. The cumulative 50% particle size of the resin particle in a volume-based particle size distribution is 10 nm or less. The resin particle has a crosslinking structure. The ratio of the cumulative 50% particle size of the pigment in a volume-based particle size distribution to the cumulative 50% particle size of the resin particle in a volume-based particle size distribution is 3.0 times or more to 8.0 times or less. Also, provided are an ink cartridge and an ink jet recording method using this aqueous ink.Type: ApplicationFiled: December 6, 2022Publication date: June 15, 2023Inventors: Tsuyoshi Furuse, Katsuhiro HAYASHI, Kellchl ITO, Takeshi OTA, Kuniaki FUJIMOTO
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Publication number: 20210139723Abstract: Provided is an aqueous ink capable of recording an image having a good hue as a magenta ink. The aqueous ink is an aqueous ink for ink jet including a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2). A proportion (% by mass) of a content of the second coloring material to a total content of the first coloring material and the second coloring material in the aqueous ink is 0.60% by mass or more.Type: ApplicationFiled: November 9, 2020Publication date: May 13, 2021Inventors: Kuniaki Fujimoto, Yasuaki Murai, Saki Tasaki, Hideki Yamakami
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Publication number: 20210139724Abstract: Provided is an aqueous ink that excels in a hue as a yellow ink, and capable of recording an image that excels both in color developability and light fastness. The aqueous ink is an ink for inkjet, containing a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2).Type: ApplicationFiled: November 9, 2020Publication date: May 13, 2021Inventors: Yasuaki Murai, Kuniaki Fujimoto, Saki Tasaki
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Patent number: 10280323Abstract: Provided is an aqueous ink that enables the recording of images having high optical density and excellent toughness and has excellent reliability. An aqueous ink for ink jet includes a pigment, a resin having an anionic group, a salt and a water-soluble organic solvent. The pigment is a self-dispersible pigment in which an anionic group is bonded to the particle surface of carbon black directly or through another atomic group, the resin has a weight-average molecular weight of 20,000 or less, the water-soluble organic solvent includes glycerol and an additional solvent other than glycerol, and the content (% by mass) of the additional solvent relative to the content (% by mass) of glycerol in terms of mass ratio is 0.6 times or less.Type: GrantFiled: March 6, 2018Date of Patent: May 7, 2019Assignee: Canon Kabushiki KaishaInventors: Kuniaki Fujimoto, Kenji Moribe, Kenichi Shiiba, Yuki Nishino
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Patent number: 10259960Abstract: An ink jet aqueous ink includes a pigment and a water-soluble organic solvent. The pigment includes a self-dispersible pigment having a carboxylic acid group directly bonded to a particle surface of carbon black having a DBP oil absorption of 120 mL/100 g or more to 150 mL/100 g or less, and has a surface charge amount of 0.20 mmol/g or more to 0.25 mmol/g or less, the water-soluble organic solvent contains a first water-soluble organic solvent having a relative dielectric constant of 28.0 or more at a temperature of 25° C., and a ratio of a content of the first water-soluble organic solvent to a total content of the water-soluble organic solvent is 50.0 mass % or more to 60.0 mass % or less.Type: GrantFiled: September 29, 2016Date of Patent: April 16, 2019Assignee: Canon Kabushiki KaishaInventors: Kuniaki Fujimoto, Masashi Tsujimura, Shuhei Takiguchi
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Publication number: 20180258299Abstract: Provided is an aqueous ink that enables the recording of images having high optical density and excellent toughness and has excellent reliability. An aqueous ink for ink jet includes a pigment, a resin having an anionic group, a salt and a water-soluble organic solvent. The pigment is a self-dispersible pigment in which an anionic group is bonded to the particle surface of carbon black directly or through another atomic group, the resin has a weight-average molecular weight of 20,000 or less, the water-soluble organic solvent includes glycerol and an additional solvent other than glycerol, and the content (% by mass) of the additional solvent relative to the content (% by mass) of glycerol in terms of mass ratio is 0.6 times or less.Type: ApplicationFiled: March 6, 2018Publication date: September 13, 2018Inventors: Kuniaki Fujimoto, Kenji Moribe, Kenichi Shiiba, Yuki Nishino
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Publication number: 20170107387Abstract: An ink jet aqueous ink includes a pigment and a water-soluble organic solvent. The pigment includes a self-dispersible pigment having a carboxylic acid group directly bonded to a particle surface of carbon black having a DBP oil absorption of 120 mL/100 g or more to 150 mL/100 g or less, and has a surface charge amount of 0.20 mmol/g or more to 0.25 mmol/g or less, the water-soluble organic solvent contains a first water-soluble organic solvent having a relative dielectric constant of 28.0 or more at a temperature of 25° C., and a ratio of a content of the first water-soluble organic solvent to a total content of the water-soluble organic solvent is 50.0 mass % or more to 60.0 mass % or less.Type: ApplicationFiled: September 29, 2016Publication date: April 20, 2017Inventors: Kuniaki Fujimoto, Masashi Tsujimura, Shuhei Takiguchi
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Patent number: 9238741Abstract: An aqueous ink for ink jet contains a self-dispersible pigment in which a first functional group including a phosphonic acid group and a second functional group including at least one of a carboxylic acid group and a sulfonic acid group are bonded to a particle surface, wherein a surface charge amount derived from the phosphonic acid group included in the above-described first functional group is 0.3 micromoles/m2 or more, a total surface charge amount derived from the carboxylic acid group and the sulfonic acid group included in the above-described second functional group is 1.0 micromoles/m2 or more, and a total surface charge amount derived from anionic groups included in the above-described first functional group and the above-described second functional group is 2.0 micromoles/m2 or more and 8.0 micromoles/m2 or less.Type: GrantFiled: May 7, 2013Date of Patent: January 19, 2016Assignee: Canon Kabushiki KaishaInventors: Kenji Moribe, Arihiro Saito, Yuki Nishino, Kuniaki Fujimoto, Satoshi Kudo
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Patent number: 8814341Abstract: Provided is an ink capable of recording an image that is excellent in ozone resistance, hardly causes blurring or color change even in a high-humidity environment, and is excellent in humidity resistance. The ink includes a coloring material and a lithium ion. The coloring material includes a compound represented by the following general formula (I) and a content of the lithium ion in the ink is 3.5 times or more in terms of molar ratio with respect to a content of the compound represented by the general formula (I).Type: GrantFiled: May 10, 2013Date of Patent: August 26, 2014Assignee: Canon Kabushiki KaishaInventors: Ryosuke Nagao, Jun Yoshizawa, Hideki Yamakami, Kuniaki Fujimoto, Yukako Tamanuki, Otome Yamashita, Minako Kawabe, Junichi Sakai, Satoshi Kudo
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Publication number: 20140168314Abstract: An aqueous ink for ink jet contains a self-dispersible pigment in which a first functional group including a phosphonic acid group and a second functional group including at least one of a carboxylic acid group and a sulfonic acid group are bonded to a particle surface, wherein a surface charge amount derived from the phosphonic acid group included in the above-described first functional group is 0.3 micromoles/m2 or more, a total surface charge amount derived from the carboxylic acid group and the sulfonic acid group included in the above-described second functional group is 1.0 micromoles/m2 or more, and a total surface charge amount derived from anionic groups included in the above-described first functional group and the above-described second functional group is 2.0 micromoles/m2 or more and 8.0 micromoles/m2 or less.Type: ApplicationFiled: May 7, 2013Publication date: June 19, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Moribe, Arihiro Saito, Yuki Nishino, Kuniaki Fujimoto, Satoshi Kudo
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Publication number: 20130335490Abstract: Provided is an ink capable of recording an image that is excellent in ozone resistance, hardly causes blurring or color change even in a high-humidity environment, and is excellent in humidity resistance. The ink includes a coloring material and a lithium ion. The coloring material includes a compound represented by the following general formula (I) and a content of the lithium ion in the ink is 3.5 times or more in terms of molar ratio with respect to a content of the compound represented by the general formula (I).Type: ApplicationFiled: May 10, 2013Publication date: December 19, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Ryosuke Nagao, Jun Yoshizawa, Hideki Yamakami, Kuniaki Fujimoto, Yukako Tamanuki, Otome Yamashita, Minako Kawabe, Junichi Sakai, Satoshi Kudo
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Ink jet ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus
Patent number: 7618484Abstract: The present invention provides an ink jet ink having a magenta color which gives an image excellent in magenta color tone and also excellent in image fastness (lightfastness and gas resistance). The ink jet ink includes a first coloring material that is an anthrapyridone compound having a structure represented by general formula (I) and/or general formula (II) and a second coloring material that is an azo compound having a structure represented by general formula (III), wherein the mass ratio of the content of the first coloring material to the content of the second coloring material is from 2.5 or more to 10.0 or less.Type: GrantFiled: April 22, 2008Date of Patent: November 17, 2009Assignee: Canon Kabushiki KaishaInventors: Kuniaki Fujimoto, Jun Yoshizawa, Minako Kawabe, Daiji Okamura -
Patent number: 7566362Abstract: An ink containing at least two coloring materials of a first coloring material and a second coloring material, wherein the first coloring material is a compound represented by the general formula (I), and the second coloring material is a compound represented by the general formula (II):Type: GrantFiled: July 15, 2008Date of Patent: July 28, 2009Assignee: Canon Kabushiki KaishaInventors: Otome Mori, Kuniaki Fujimoto, Yojiro Kojima, Jun Yoshizawa, Daiji Okamura
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Patent number: 7504488Abstract: The present invention is a dye represented by the following general formula (1), a method of producing the dye and an ink containing the dye, wherein R1 represents a hydrogen atom, an alkyl group that may be substituted, an aryl group that may be substituted or an aralkyl group that may be substituted; R2 represents an alkyl group that may be substituted, a cycloalkyl group that may be substituted or an aralkyl group that may be substituted; R3 represents an alkyl group that may be substituted, an aryl group that may be substituted or an aralkyl group that may be substituted; X1 through X3 independently represent a hydrogen atom or any substituent; and M represents a counter ion.Type: GrantFiled: May 15, 2007Date of Patent: March 17, 2009Assignee: Canon Kabushiki KaishaInventors: Takayuki Toyoda, Yasuaki Murai, Waka Hasegawa, Masashi Hirose, Kuniaki Fujimoto, Takeshi Miyazaki
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Publication number: 20090047430Abstract: An ink containing at least two coloring materials of a first coloring material and a second coloring material, wherein the first coloring material is a compound represented by the general formula (I), and the second coloring material is a compound represented by the general formula (II):Type: ApplicationFiled: July 15, 2008Publication date: February 19, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Otome Mori, Kuniaki Fujimoto, Yojiro Kojima, Jun Yoshizawa, Daiji Okamura
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INK JET INK, INK JET RECORDING METHOD, INK CARTRIDGE, RECORDING UNIT AND INK JET RECORDING APPARATUS
Publication number: 20080274284Abstract: The present invention provides an ink jet ink having a magenta color which gives an image excellent in magenta color tone and also excellent in image fastness (lightfastness and gas resistance). The ink jet ink includes a first coloring material that is an anthrapyridone compound having a structure represented by general formula (I) and/or general formula (II) and a second coloring material that is an azo compound having a structure represented by general formula (III), wherein the mass ratio of the content of the first coloring material to the content of the second coloring material is from 2.5 or more to 10.0 or less.Type: ApplicationFiled: April 22, 2008Publication date: November 6, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Kuniaki Fujimoto, Jun Yoshizawa, Minako Kawabe, Daiji Okamura -
Patent number: 7445325Abstract: The present invention aims to provide an ink tank which can elongate the lifetime of ink jet recording apparatus and further stores therein an ink which can achieve superior image characteristics such as image fastness. The present invention provides an ink tank which includes an ink storage portion storing an aqueous ink therein, having fine channels which retain the aqueous ink by capillary force, wherein the aqueous ink includes at least water and a water-soluble coloring material, and further includes a compound satisfying specific requirements.Type: GrantFiled: January 31, 2006Date of Patent: November 4, 2008Assignee: Canon Kabushiki KaishaInventors: Yoshihide Aikawa, Kuniaki Fujimoto, Sadayuki Sugama
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Publication number: 20070277701Abstract: The present invention is a dye represented by the following general formula (1), a method of producing the dye and an ink containing the dye, wherein R1 represents a hydrogen atom, an alkyl group that may be substituted, an aryl group that may be substituted or an aralkyl group that may be substituted; R2 represents an alkyl group that may be substituted, a cycloalkyl group that may be substituted or an aralkyl group that may be substituted; R3 represents an alkyl group that may be substituted, an aryl group that may be substituted or an aralkyl group that may be substituted; X1 through X3 independently represent a hydrogen atom or any substituent; and M represents a counter ion.Type: ApplicationFiled: May 15, 2007Publication date: December 6, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Takayuki Toyoda, Yasuaki Murai, Waka Hasegawa, Masashi Hirose, Kuniaki Fujimoto, Takeshi Miyazaki