Patents by Inventor Tetsuya Eguchi
Tetsuya Eguchi 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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Publication number: 20230392032Abstract: A water-based ink for ink-jet printing, including a pigment, water-insoluble crosslinked polymer particles, an organic solvent, and water. The water-insoluble crosslinked polymer particles are constituted of a polymer A having a crosslinked structure, which includes carboxy groups and has an acid value of not less than 45 mgKOH/g and not more than 180 mgKOH/g. The ink includes alkali metal ions in an amount of not less than 15 mol % and not more than 65 mol %, and ammonium ions in an amount of not less than 55 mol % and not more than 145 mol %, both on the basis of a whole molar amount of the carboxy groups of the polymer A.Type: ApplicationFiled: October 26, 2021Publication date: December 7, 2023Applicant: KAO CORPORATIONInventors: Masashi INOUE, Daiki KAWATA, Tetsuya EGUCHI
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Publication number: 20230309815Abstract: A vision testing device and related technique, the vision testing device including a touch screen, sequentially displaying visual targets on the touch screen while displaying a fixation target whose position is fixed on the touch screen, during a period from the beginning to the end of the test, and providing a test result based on whether a testee taps the visual target or not.Type: ApplicationFiled: January 26, 2021Publication date: October 5, 2023Applicant: CREWT MEDICAL SYSTEMS, INC.Inventors: Satoshi INOUE, Shinji KIMURA, Tetsuya EGUCHI
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Patent number: 11072719Abstract: The present invention relates to a pigment water dispersion containing pigment-containing water-insoluble crosslinked polymer A particles, a water-soluble basic compound and water, in which a water-insoluble crosslinked polymer A constituting the particles has a carboxy group and a crosslinked structure containing an ester group derived from a water-insoluble crosslinking agent, a saponification value of the water-insoluble crosslinked polymer A is from 170 to 300 mgKOH/g, and the water-soluble basic compound contains a water-soluble amine compound; a process for producing the pigment water dispersion; a water-based ink for ink-jet printing which contains the pigment water dispersion; and an ink-jet printing method using the water-based ink.Type: GrantFiled: August 9, 2017Date of Patent: July 27, 2021Assignee: KAO CORPORATIONInventors: Tetsuya Eguchi, Hirokazu Hyakuda
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Patent number: 11066564Abstract: The present invention relates to a water-based pigment dispersion containing a polymer dispersant and a pigment, the polymer dispersant being prepared by crosslinking a carboxy group-containing water-insoluble polymer (A) with a water-insoluble polyfunctional epoxy compound, in which carboxy groups of the water-insoluble polymer (A) are at least partially neutralized by an alkali metal compound, and the water-based pigment dispersion satisfies the following conditions 1 to 3. The water-based pigment dispersion of the present invention can exhibit excellent redispersibility capable of suppressing solidification of the pigment or the polymer in ink ejection nozzles and can ensure good storage stability under high-temperature conditions.Type: GrantFiled: October 13, 2017Date of Patent: July 20, 2021Assignee: KAO CORPORATIONInventors: Yusuke Shimizu, Koji Azuma, Hirokazu Hyakuda, Tetsuya Eguchi, Hiroki Kawaguchi
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Patent number: 10738207Abstract: The present invention relates to a water-based pigment dispersion having not only excellent storage stability capable of suppressing solidification of a pigment or the like in ink ejection nozzles, but also excellent ejection properties and fixing properties, while maintaining good water resistance of the pigment dispersion as an advantage attained by using the pigment therein.Type: GrantFiled: December 8, 2016Date of Patent: August 11, 2020Assignee: KAO CORPORATIONInventors: Koji Azuma, Hirokazu Hyakuda, Yusuke Shimizu, Tetsuya Eguchi, Hiroki Kawaguchi
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Publication number: 20190315983Abstract: The present invention relates to a water-based pigment dispersion containing a polymer dispersant and a pigment, the polymer dispersant being prepared by crosslinking a carboxy group-containing water-insoluble polymer (A) with a water-insoluble polyfunctional epoxy compound, in which carboxy groups of the water-insoluble polymer (A) are at least partially neutralized by an alkali metal compound, and the water-based pigment dispersion satisfies the following conditions 1 to 3. The water-based pigment dispersion of the present invention can exhibit excellent redispersibility capable of suppressing solidification of the pigment or the polymer in ink ejection nozzles and can ensure good storage stability under high-temperature conditions.Type: ApplicationFiled: October 13, 2017Publication date: October 17, 2019Applicant: KAO CORPORATIONInventors: Yusuke SHIMIZU, Koji AZUMA, Hirokazu HYAKUDA, Tetsuya EGUCHI, Hiroki KAWAGUCHI
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Publication number: 20190284410Abstract: The present invention relates to a water-based pigment dispersion having not only excellent storage stability capable of suppressing solidification of a pigment or the like in ink ejection nozzles, but also excellent ejection properties and fixing properties, while maintaining good water resistance of the pigment dispersion as an advantage attained by using the pigment therein.Type: ApplicationFiled: December 8, 2016Publication date: September 19, 2019Applicant: KAO CORPORATIONInventors: Koji AZUMA, Hirokazu HYAKUDA, Yusuke SHIMIZU, Tetsuya EGUCHI, Hiroki KAWAGUCHI
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Publication number: 20190169455Abstract: The present invention relates to a pigment water dispersion containing pigment-containing water-insoluble crosslinked polymer A particles, a water-soluble basic compound and water, in which a water-insoluble crosslinked polymer A constituting the particles has a carboxy group and a crosslinked structure containing an ester group derived from a water-insoluble crosslinking agent, a saponification value of the water-insoluble crosslinked polymer A is from 170 to 300 mgKOH/g, and the water-soluble basic compound contains a water-soluble amine compound; a process for producing the pigment water dispersion; a water-based ink for ink-jet printing which contains the pigment water dispersion; and an ink-jet printing method using the water-based ink.Type: ApplicationFiled: August 9, 2017Publication date: June 6, 2019Applicant: KAO CORPORATIONInventors: Tetsuya EGUCHI, Hirokazu HYAKUDA
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Patent number: 9878558Abstract: There is provided a water-based ink for ink-jet printing which is excellent in optical density when printed on any of a high-water absorbing recording medium and a low-water absorbing recording medium, spreading of the dot size on the low-water absorbing recording medium, and rub fastness.Type: GrantFiled: June 4, 2014Date of Patent: January 30, 2018Assignee: KAO CORPORATIONInventors: Tetsuya Eguchi, Ryuma Mizushima
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Patent number: 9388321Abstract: The present invention relates to an ink jet printing method for printing images or characters on a recording medium using a water-based ink, in which the water-based ink includes pigment-containing water-insoluble polymer particles A, water-insoluble polymer particles B, an organic solvent C and water; the water-insoluble polymer particles A includes a water-insoluble polymer (a) containing constitutional units derived from an ionic monomer (a-1), an aromatic ring-containing hydrophobic monomer (a-2) and a specific hydrophilic monomer (a-3), the constitutional unit derived from the hydrophilic monomer (a-3) being present in an amount of from 13 to 45% by mass; the organic solvent C includes one or more organic solvents having a boiling point of 90° C. or higher, and has an average boiling point of 250° C. or lower as a weighted mean value; and the recording medium has a water absorption of from 0 to 10 g/m2 as measured in a pure water contact time of 100 ms.Type: GrantFiled: December 10, 2013Date of Patent: July 12, 2016Assignee: KAO CORPORATIONInventors: Ryuma Mizushima, Tetsuya Eguchi
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Publication number: 20160130453Abstract: There is provided a water-based ink for ink-jet printing which is excellent in optical density when printed on any of a high-water absorbing recording medium and a low-water absorbing recording medium, spreading of the dot size on the low-water absorbing recording medium, and rub fastness.Type: ApplicationFiled: June 4, 2014Publication date: May 12, 2016Applicant: KAO CORPORATIONInventors: Tetsuya EGUCHI, Ryuma MIZUSHIMA
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Publication number: 20150344713Abstract: The present invention relates to an ink jet printing method for printing images or characters on a recording medium using a water-based ink, in which the water-based ink includes pigment-containing water-insoluble polymer particles A, water-insoluble polymer particles B, an organic solvent C and water; the water-insoluble polymer particles A includes a water-insoluble polymer (a) containing constitutional units derived from an ionic monomer (a-1), an aromatic ring-containing hydrophobic monomer (a-2) and a specific hydrophilic monomer (a-3), the constitutional unit derived from the hydrophilic monomer (a-3) being present in an amount of from 13 to 45% by mass; the organic solvent C includes one or more organic solvents having a boiling point of 90° C. or higher, and has an average boiling point of 250° C. or lower as a weighted mean value; and the recording medium has a water absorption of from 0 to 10 g/m2 as measured in a pure water contact time of 100 ms.Type: ApplicationFiled: December 10, 2013Publication date: December 3, 2015Applicant: KAO CORPORATIONInventors: Ryuma MIZUSHIMA, Tetsuya EGUCHI
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Patent number: 8641701Abstract: There is provided a probe type living body tissue removing device comprising a probe unit having a probe formed in a capillary tube shape and an opening hole portion for internally aspirating a living body tissue, and also having a dissection device arranged within the probe and dissecting the living body tissue aspirated into the probe from the opening hole portion of the probe; wherein an aspiration force supplying device for supplying aspiration force to the probe unit, and a dissection driving source supplying device for supplying power or energy for fulfilling a function of the dissection device to the probe unit are connected to the probe unit; and the probe type living body tissue removing device dissects, and aspirates and removes the living body tissue by the dissecting means while the probe is inserted into the living body tissue and the living body tissue is aspirated through the opening hole portion; and a plurality of the opening hole portions of the probe are arranged.Type: GrantFiled: March 6, 2008Date of Patent: February 4, 2014Assignees: Kyoto University, Hoya CorporationInventors: Masanori Hangai, Nagahisa Yoshimura, Masaaki Nakahara, Kazunori Miyata, Tetsuya Eguchi, Yasuhiro Osakabe
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Publication number: 20100106054Abstract: There is provided a probe type living body tissue removing device comprising a probe unit having a probe formed in a capillary tube shape and an opening hole portion for internally aspirating a living body tissue, and also having a dissection device arranged within the probe and dissecting the living body tissue aspirated into the probe from the opening hole portion of the probe; wherein an aspiration force supplying device for supplying aspiration force to the probe unit, and a dissection driving source supplying device for supplying power or energy for fulfilling a function of the dissection device to the probe unit are connected to the probe unit; and the probe type living body tissue removing device dissects, and aspirates and removes the living body tissue by the dissecting means while the probe is inserted into the living body tissue and the living body tissue is aspirated through the opening hole portion; and a plurality of the opening hole portions of the probe are arranged.Type: ApplicationFiled: March 6, 2008Publication date: April 29, 2010Applicants: KYOTO UNIVERSITY, HOYA CORPORATIONInventors: Masanori Hangai, Nagahisa Yoshimura, Masaaki Nakahara, Kazunori Miyata, Tetsuya Eguchi, Yasuhiro Osakabe