Patents by Inventor Nobuyuki Takizawa
Nobuyuki Takizawa 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: 11992305Abstract: A magnetic resonance imaging apparatus captures a morphology image and a function image that are captured with respect to an equal imaging region of an object under examination. Processing for deforming the morphology image is performed using a deformation parameter and moving positions of structural objects included in the morphology image to respective positions of structural objects of a previously determined standard morphology. Then, the function image is deformed using a value of the deformation parameter used in deforming the morphology image to cause a position of a region included in the function image to coincide with a position of a corresponding region of the standard morphology or by using the standard morphology in an opposite direction using the value of the deformation parameter to cause a position of a region of the structural object thereof to coincide with a position of a corresponding region included in the function image.Type: GrantFiled: April 14, 2021Date of Patent: May 28, 2024Assignee: FUJIFILM HEALTHCARE CORPORATIONInventors: Yasuo Kawata, Masahiro Takizawa, Nobuyuki Yoshizawa
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Publication number: 20240111009Abstract: Preventing blood flow artifacts from being increased in an imaging plane allows reduction of the blood flow artifacts in the cross section subsequently excited. In the imaging using a spin-echo (SE) pulse sequence, an excitation width of a 90° pulse is extended from an imaging plane to one side. This one side indicates a downstream side of the blood flow with respect to a vessel of interest. In imaging multiple slices, the order of measuring the multiple imaging slices is set along the direction in which the width is extended.Type: ApplicationFiled: September 15, 2023Publication date: April 4, 2024Inventors: Kazuho Kamba, Masahiro Takizawa, Taisei Ueda, Nobuyuki Yoshizawa, Atsushi Kuratani, Kosuke Ito
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Publication number: 20200407580Abstract: The present invention relates to an ink that is cured by irradiation with an active energy ray and contains not less than 8.5% by mass and not more than 65% by mass of a water-based medium, not less than 30% by mass of a water-soluble active energy ray-polymerizable monomer (i) and a pigment that is dispersed in the ink with a polymer dispersant (a); a process for producing the ink; and an ink-jet printing method using the ink.Type: ApplicationFiled: March 20, 2018Publication date: December 31, 2020Applicant: KAO CORPORATIONInventors: Tomohide YOSHIDA, Nobuyuki TAKIZAWA
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Patent number: 8222334Abstract: The present invention relates to a water-based ink for ink-jet printing which not only satisfies a high optical density but also exhibits an excellent high lighter-fastness; a water dispersion used for the water-based ink; and a method for producing a print using the water-based ink. There are provided a water dispersion for ink-jet printing comprising (i) (A-1) polymer particles containing a colorant, (B) polymer particles and (C) the water-insoluble organic compound, or (ii) (A-2) self-dispersible pigment, (B) polymer particles and (C) the water-insoluble organic compound; a water-based ink containing the water dispersion; and a method for producing a print using the water-based ink.Type: GrantFiled: February 28, 2011Date of Patent: July 17, 2012Assignee: Kao CorporationInventors: Yasuhiro Doi, Yasushi Ito, Nobuyuki Takizawa, Shigeki Nagashima
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Patent number: 8222318Abstract: The present invention relates to (1) a process for producing a water dispersion for ink-jet printing containing colorant-containing polymer particles which includes a step I of obtaining a dispersion of colorant-containing polymer particles; a step II of obtaining a water dispersion of the colorant-containing polymer particles from the dispersion obtained in the step I; a step III of mixing the water dispersion obtained in the step II with an organic solvent (B) to suitably control a relative dielectric constant of a mixed solvent in the resultant dispersion, thereby precipitating the colorant-containing polymer particles; and a step IV of separating precipitates obtained in the step III from the dispersion and re-dispersing the precipitates in a water-based solvent; (2) a water-based ink for ink-jet printing which is excellent in ejection stability and optical density; (3) a process for purifying a water dispersion for ink-jet printing; and (4) a process for producing a dispersion containing groups of fine pType: GrantFiled: December 13, 2007Date of Patent: July 17, 2012Assignee: Kao CorporationInventors: Ryuma Mizushima, Nobuyuki Takizawa
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Publication number: 20110152442Abstract: The present invention relates to a water-based ink for ink-jet printing which not only satisfies a high optical density but also exhibits an excellent high lighter-fastness; a water dispersion used for the water-based ink; and a method for producing a print using the water-based ink. There are provided a water dispersion for ink-jet printing comprising (i) (A-1) polymer particles containing a colorant, (B) polymer particles and (C) the water-insoluble organic compound, or (ii) (A-2) self-dispersible pigment, (B) polymer particles and (C) the water-insoluble organic compound; a water-based ink containing the water dispersion; and a method for producing a print using the water-based ink.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Applicant: KAO CORPORATIONInventors: Yasuhiro Doi, Yasushi Ito, Nobuyuki Takizawa, Shigeki Nagashima
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Patent number: 7741386Abstract: A water dispersion for inkjet printing which contains polymer particles containing a colorant. The polymer constituting the polymer particles is produced by the copolymerization of a monomer mixture in the presence of a-methylstyrene dimer. The water dispersion for inkjet printing and a water-based ink for inkjet printing containing the water dispersion exhibit excellent jetting properties and a high optical density.Type: GrantFiled: October 27, 2005Date of Patent: June 22, 2010Assignee: Kao CorporationInventors: Akira Umada, Koji Azuma, Nobushige Tanaka, Nobuyuki Takizawa, Takehiro Tsutsumi
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Patent number: 7666924Abstract: A polymeric dispersant containing a vinyl polymer having a constitutional unit represented by the following formula 1: wherein R1 is a hydrogen atom or a methyl group, R2 and R4 may be the same or different and are each independently an alkylene group having from 2 to 18 carbon atoms or an arylene group having from 6 to 18 carbon atoms, R3 is an alkylene group having from 4 to 18 carbon atoms or an arylene group having from 6 to 18 carbon atoms, M1 and M2 may be the same or different and are each independently a hydrogen atom or a cation, k and m may be the same or different and are each independently a number from 0 to 20, and L is a number from 1 to 20, with the proviso that L is 2 or more when k is zero. The polymeric dispersant is used for the production of a water dispersion for ink-jet printing. The water dispersion for ink-jet printing is used for the production of a water-based ink for ink-jet printing.Type: GrantFiled: June 10, 2005Date of Patent: February 23, 2010Assignee: KAO CorporationInventors: Nobuyuki Takizawa, Shigeki Nagashima, Takehiro Tsutsumi
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Publication number: 20100036048Abstract: The present invention relates to (1) a process for producing a water dispersion for ink-jet printing containing colorant-containing polymer particles which includes a step I of obtaining a dispersion of colorant-containing polymer particles; a step II of obtaining a water dispersion of the colorant-containing polymer particles from the dispersion obtained in the step I; a step III of mixing the water dispersion obtained in the step II with an organic solvent (B) to suitably control a relative dielectric constant of a mixed solvent in the resultant dispersion, thereby precipitating the colorant-containing polymer particles; and a step IV of separating precipitates obtained in the step III from the dispersion and re-dispersing the precipitates in a water-based solvent; (2) a water-based ink for ink-jet printing which is excellent in ejection stability and optical density; (3) a process for purifying a water dispersion for ink-jet printing; and (4) a process for producing a dispersion containing groups of fine pType: ApplicationFiled: December 13, 2007Publication date: February 11, 2010Inventors: Ryuma Mizushima, Nobuyuki Takizawa
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Publication number: 20090023854Abstract: A water dispersion for inkjet printing, which contains water-insoluble polymer particles containing a colorant. The content of the water-insoluble polymer in the water dispersion is from 1 to 7% by weight, and the surface tension of the water dispersion is 60 mN/m or higher at 20° C. A water-based ink for inkjet printing which contains the water dispersion produces printed images with a high optical density and a good color-to-color bleed resistance.Type: ApplicationFiled: November 1, 2005Publication date: January 22, 2009Applicant: KAO CORPORATIONInventors: Nobuyuki Takizawa, Akira Umada, Nobushige Tanaka, Takehiro Tsutsumi
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Publication number: 20080097015Abstract: The present invention relates to a water-based ink for ink-jet printing which not only satisfies a high optical density but also exhibits an excellent high lighter-fastness; a water dispersion used for the water-based ink; and a method for producing a print using the water-based ink. There are provided a water dispersion for ink-jet printing comprising (i) (A-1) polymer particles containing a colorant, (B) polymer particles and (C) the water-insoluble organic compound, or (ii) (A-2) self-dispersible pigment, (B) polymer particles and (C) the water-insoluble organic compound; a water-based ink containing the water dispersion; and a method for producing a print using the water-based ink.Type: ApplicationFiled: October 6, 2005Publication date: April 24, 2008Applicant: Kao CorporationInventors: Yasuhiro Doi, Yasushi Ito, Nobuyuki Takizawa, Shigeki Nagashima
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Patent number: 7351754Abstract: A water-based ink comprising a colorant and a water-insoluble polymer having at least two hydroxyl groups at its end; a water-based ink comprising a water-insoluble polymer having an ionic group at its end and a pigment; and a process for preparing a water-based ink, comprising dissolving a water-insoluble polymer having an ionic group at its end or at least two hydroxyl groups at its end in an organic solvent; adding a pigment, water and a neutralizing agent, and optionally a surfactant to the resulting solution; kneading the mixture to form a paste; diluting the paste with water as occasion demands; and distilling off the organic solvent to make it into a water-based system. The water-based ink can be suitably used for printers for inkjet printing.Type: GrantFiled: June 25, 2003Date of Patent: April 1, 2008Assignee: Kao CorporationInventors: Yukihiro Nakano, Nobuyuki Takizawa
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Patent number: 7345099Abstract: The present invention relates to an aqueous ink for ink jet printer recording including a water dispersion of water-insoluble vinyl polymer particles containing carbon black, wherein the carbon black has a volatile content of 5% or less at 950° C. and includes at least two kinds of carbon black differing from each other in at least one of a primary particle diameter, a specific surface area and a DBP absorption amount.Type: GrantFiled: June 29, 2004Date of Patent: March 18, 2008Assignee: Kao CorporationInventors: Nobuyuki Takizawa, Takehiro Tsutsumi, Shigeki Nagashima
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Publication number: 20070289485Abstract: A water dispersion for inkjet printing which contains polymer particles containing a colorant. The polymer constituting the polymer particles is produced by the copolymerization of a monomer mixture in the presence of a-methylstyrene dimer. The water dispersion for inkjet printing and a water-based ink for inkjet printing containing the water dispersion exhibit excellent jetting properties and a high optical density.Type: ApplicationFiled: October 27, 2005Publication date: December 20, 2007Inventors: Akira Umada, Koji Azuma, Nobushige Tanaka, Nobuyuki Takizawa, Takehiro Tsutsumi
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Patent number: 7121659Abstract: The present invention relates to an aqueous ink for ink jet recording and a water dispersion for ink jet recording, including water-insoluble vinyl polymer particles containing a colorant, the water-insoluble vinyl polymer being a water-insoluble vinyl polymer obtained by polymerizing a monomer mixture of: (A) a monomer represented by the formula (I): wherein R1 represents a hydrogen atom or a lower alkyl group, R2 represents an alkylene group having 2 to 18 carbon atoms or an alkylene group having 2 to 4 carbon atoms in which a phenyl group is substituted for a hydrogen atom thereof, n denotes a number from 2 to 30 and R3 represents a straight or branched alkyl group having 8 to 30 carbon atoms; (B) a monomer containing a salt-forming monomer; and (C) a hydrophobic monomer.Type: GrantFiled: June 25, 2004Date of Patent: October 17, 2006Assignee: Kao CorporationInventors: Shigeki Nagashima, Nobuyuki Takizawa
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Publication number: 20050282932Abstract: A polymeric dispersant containing a vinyl polymer having a constitutional unit represented by the following formula 1: wherein R1 is a hydrogen atom or a methyl group, R2 and R4 may be the same or different and are each independently an alkylene group having from 2 to 18 carbon atoms or an arylene group having from 6 to 18 carbon atoms, R3 is an alkylene group having from 4 to 18 carbon atoms or an arylene group having from 6 to 18 carbon atoms, M1 and M2 may be the same or different and are each independently a hydrogen atom or a cation, k and m may be the same or different and are each independently a number from 0 to 20, and L is a number from 1 to 20, with the proviso that L is 2 or more when k is zero. The polymeric dispersant is used for the production of a water dispersion for ink-jet printing. The water dispersion for ink-jet printing is used for the production of a water-based ink for ink-jet printing.Type: ApplicationFiled: June 10, 2005Publication date: December 22, 2005Applicant: KAO CORPORATIONInventors: Nobuyuki Takizawa, Shigeki Nagashima, Takehiro Tsutsumi
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Publication number: 20050027036Abstract: The present invention relates to an aqueous ink for ink jet printer recording including a water dispersion of water-insoluble vinyl polymer particles containing carbon black, wherein the carbon black has a volatile content of 5% or less at 950° C. and includes at least two kinds of carbon black differing from each other in at least one of a primary particle diameter, a specific surface area and a DBP absorption amount.Type: ApplicationFiled: June 29, 2004Publication date: February 3, 2005Applicant: Kao CorporationInventors: Nobuyuki Takizawa, Takehiro Tsutsumi, Shigeki Nagashima
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Publication number: 20050012797Abstract: The present invention relates to an aqueous ink for ink jet recording and a water dispersion for ink jet recording, comprising water-insoluble vinyl polymer particles containing a colorant, the water-insoluble vinyl polymer being a water-insoluble vinyl polymer obtained by polymerizing a monomer mixture of: (A) a monomer represented by the formula (I): ?wherein R1 represents a hydrogen atom or a lower alkyl group, R2 represents an alkylene group having 2 to 18 carbon atoms or an alkylene group having 2 to 4 carbon atoms in which a phenyl group is substituted for a hydrogen atom thereof, n denotes a number from 2 to 30 and R3 represents a straight or branched alkyl group having 8 to 30 carbon atoms; (B) a monomer containing a salt-forming monomer; and (C) a hydrophobic monomer.Type: ApplicationFiled: June 25, 2004Publication date: January 20, 2005Applicant: KAO CORPORATIONInventors: Shigeki Nagashima, Nobuyuki Takizawa
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Publication number: 20040059019Abstract: A water-based ink comprising a colorant and a water-insoluble polymer having at least two hydroxyl groups at its end; a water-based ink comprising a water-insoluble polymer having an ionic group at its end and a pigment; and a process for preparing a water-based ink, comprising dissolving a water-insoluble polymer having an ionic group at its end or at least two hydroxyl groups at its end in an organic solvent; adding a pigment, water and a neutralizing agent, and optionally a surfactant to the resulting solution; kneading the mixture to form a paste; diluting the paste with water as occasion demands; and distilling off the organic solvent to make it into a water-based system. The water-based ink can be suitably used for printers for inkjet printing.Type: ApplicationFiled: June 25, 2003Publication date: March 25, 2004Applicant: KAO CORPORATIONInventors: Yukihiro Nakano, Nobuyuki Takizawa
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Patent number: 5004857Abstract: A method for continuously producing a liquid low molecular weight polymer of conjugated diolefin having a number average molecular weight of 300 to 10000. The method comprises the step of continuously polymerizing or copolymerizing conjugated diolefin in an inert hydrocarbon solvent at a temperature of 40.degree. to 70.degree. C. with maintaining the quantity of dissolved oxygen in the reaction system at 1 ppm or below and in the presence of a polymerization catalyst of an organic sodium compound and a chain transfer agent of an alkylaryl compound.Type: GrantFiled: November 3, 1988Date of Patent: April 2, 1991Assignee: Nippon Petrochemicals Company, LimitedInventors: Shoji Iida, Kazuo Miyazaki, Nobuyuki Takizawa