Patents by Inventor Yasuo Yamamoto
Yasuo Yamamoto 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: 20140240814Abstract: An electrophoretic particle includes a polymer having at least a reactive compound represented by the following Formula (I) as a polymerizable component, at least on a surface: wherein in Formula (I), Ra represents a hydrogen atom or a methyl group, X represents a substituted or unsubstituted divalent hydrocarbon group, Y represents a substituted or unsubstituted divalent hydrocarbon group, and Z represents a hydrogen atom, or a substituted or unsubstituted monovalent hydrocarbon group.Type: ApplicationFiled: August 22, 2013Publication date: August 28, 2014Applicant: FUJI XEROX CO., LTD.Inventor: Yasuo YAMAMOTO
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Method for manufacturing silver triangular pyramid particles and silver triangular pyramid particles
Patent number: 8790505Abstract: The present invention provides a method for manufacturing silver triangular pyramid particles including: forming an electric field in an electrolytic solution including silver ions and a surfactant to reduce the silver ions into silver triangular pyramid particles.Type: GrantFiled: November 29, 2012Date of Patent: July 29, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Kei Shimotani, Jun Kawahara, Satoshi Tatsuura, Yasuo Yamamoto -
Patent number: 8717282Abstract: White particles for display including at least one of a chain or cyclic polysilane compound having a polysilane structure represented by the following Formula (I) or a halogen-substituted compound thereof: wherein in Formula (I), A represents a phenyl group, B represents an alkyl group or a phenyl group, and n represents an integer of from 5 to 1000.Type: GrantFiled: March 4, 2013Date of Patent: May 6, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Yamamoto, Hiroaki Moriyama
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Patent number: 8704754Abstract: A driving device of a display medium that including first and second particle groups migrating independently due to a first voltage being imparted for a first time period, forming aggregates due to the first voltage being imparted for a second time period, and the aggregates migrating due to a second voltage being imparted. The driving device includes a voltage imparting section that: imparts a third voltage that moves, to a display substrate side, a greater-amount-needed particle group for gradation display, in an amount of a difference between particles of the first particle group and second particle group needed for the display; when the greater-amount-needed particle group has an opposite polarity to the aggregates, imparts a fourth voltage that moves the aggregates needed to the display substrate side; and when the polarities are same, imparts a fifth voltage that moves the aggregates not needed to a rear substrate side.Type: GrantFiled: October 18, 2010Date of Patent: April 22, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshinori Machida, Hiroaki Moriyama, Yasuo Yamamoto
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Publication number: 20140104675Abstract: A particle dispersion for display includes color particles for display that move in response to an electric field and include first color particles and second color particles; and a dispersion medium that disperses the color particles for display, in which the second color particles have a larger particle diameter than a particle diameter of the first color particles and the same charging characteristic as a charging characteristic of the first color particles, and in the color particles for display, a ratio (Cs/Cl) of a charge amount Cs of the first color particles per unit area of display to a charge amount Cl of the second color particles per unit area of display is less than or equal to 5.Type: ApplicationFiled: April 26, 2013Publication date: April 17, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Takashi Morikawa, Naoki Hiji, Yasuo Yamamoto, Daisuke Nakayama, Mieko Seki, Hiroaki Moriyama, Ryota Mizutani, Masaaki Abe, Nami Tokunaga, Chikara Manabe, Jun Cao
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Patent number: 8654070Abstract: Electrophoretic particles including mother particles and a dispersant that covers the surface of the mother particles, the mother particles including a resin and a colorant, and the dispersant having a structure represented by the following Formula (1): wherein in Formula (1), R1 represents a dimethyl siloxane chain that comprises two or more dimethyl siloxane structures that are linked together, the dimethyl siloxane chain being optionally substituted by an organic group; R2 represents a hydrogen atom or a methyl group; Ar1 represents an organic group having an aromatic group; a represents an integer of from 8 to 88; b represents an integer of from 12 to 82; c represents an integer of from 0 to 30; f represents an integer of from 1 to 3; the total of a, b and c is 100; and the ratio of unit (b) in the dispersant having a structure represented by Formula (1) is about 50% by weight or less.Type: GrantFiled: March 15, 2010Date of Patent: February 18, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Nami Tokunaga, Jun Kawahara, Daisuke Nakayama, Yasuo Yamamoto, Hiroaki Moriyama
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Patent number: 8581899Abstract: A display medium includes a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a polymer compound that is a copolymer containing the following constitutional unit (A) and constitutional unit (B), X represents a group containing a silicone chain, Ra1 and Ra2 each independently represent a hydrogen atom or a methyl group, Rb2 represents an organic group containing a substituted or unsubstituted phenyl group, n1 and n2 each represent mol % of the constitutional unit relative to the whole copolymer and satisfy 0<n1<50 and 0<n2<80, respectively, and n represents a natural number of 1 or more and 3 or less.Type: GrantFiled: February 9, 2011Date of Patent: November 12, 2013Assignee: Fuji Serox Co., Ltd.Inventors: Hiroaki Moriyama, Yasuo Yamamoto, Yoshinori Machida, Ryota Mizutani
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Patent number: 8531757Abstract: A display medium includes a light control layer, wherein the light control layer includes mobile fine particles developing a color in a dispersion state and hetero-particles having characteristics different from those of the mobile fine particles. A display method includes at least one of the following steps: a step of displaying black color by allowing the mobile fine particles capable of developing a color in a dispersion state to aggregate; a step of displaying a color by allowing the mobile fine particles to disperse; or a step of displaying white color by reflection of the hetero-particles having characteristics different from those of the mobile fine particles.Type: GrantFiled: November 28, 2005Date of Patent: September 10, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Hiroaki Moriyama, Yasuo Yamamoto, Takayuki Takeuchi, Rie Ishii, Jun Kawahara
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Patent number: 8526100Abstract: The invention provides a display method for displaying an image by deposition of metal fine particles. The display method includes at least depositing metal fine particles, from an electrolytic solution that has at least a metal ion of the metal particles and that is provided between a pair of substrates having at least one translucent substrate, onto a surface of any one of the pair of substrates by imparting one stimulus. A concentration of the metal ion of the metal fine particles in the electrolytic solution after imparting the stimulus is about 200 mmol/l or less. The invention further provides a display device which uses the display method.Type: GrantFiled: May 12, 2011Date of Patent: September 3, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Jun Kawahara, Satoshi Tatsuura, Kei Shimotani, Yasuo Yamamoto
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Patent number: 8477404Abstract: A display medium includes: a pair of substrates having electrodes and disposed to form a space therebetween, at least one of the substrates transmitting light; a dispersion medium enclosed between the substrates; a group of particles that is dispersed in the dispersion medium and that moves in the dispersion medium according to an electric field applied between the substrates; and a treatment layer provided on at least one of surfaces of the substrates that oppose each other, the treatment layer being formed by treating the at least one of surfaces of the substrates that oppose each other with a polymer compound having a silicone chain.Type: GrantFiled: March 5, 2009Date of Patent: July 2, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Hiroaki Moriyama, Yoshinori Machida, Yasuo Yamamoto, Ryojiro Akashi, Akira Imai
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Patent number: 8404881Abstract: White particles for display including at least one of a chain or cyclic polysilane compound having a polysilane structure represented by the following Formula (I) or a halogen-substituted compound thereof: wherein in Formula (I), A represents a phenyl group, B represents an alkyl group or a phenyl group, and n represents an integer of from 5 to 1000.Type: GrantFiled: September 2, 2009Date of Patent: March 26, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Yamamoto, Hiroaki Moriyama
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Patent number: 8331015Abstract: A display medium including a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a copolymer containing the following constitutional unit (A) and constitutional unit (B), wherein X represents a group containing a silicone chain, Ra1 and Ra2 each independently represent a hydrogen atom or a methyl group, Rb2 represents an organic group containing a fluorine atom, n1 and n2 each represent mol% of the constitutional unit relative to the whole copolymer and satisfy 0<n1<50 and 0<n2<50, respectively, and n represents a natural number of 1 or more and 3 or less.Type: GrantFiled: January 27, 2011Date of Patent: December 11, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Hiroaki Moriyama, Yasuo Yamamoto, Yoshinori Machida, Ryota Mizutani
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Patent number: 8286923Abstract: A holding tool for an elongated member includes a connecting member to be attached to an attachment member, a first holding part for holding the elongated member comparatively tightly, and a second holding part for holding the elongated member with a prescribed space therearound. A gap is formed between the first and second holding parts so that the elongated member can move from the first holding part to the second holding part.Type: GrantFiled: August 16, 2005Date of Patent: October 16, 2012Assignee: Nifco Inc.Inventors: Yuji Kobayashi, Yasuo Yamamoto
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Patent number: 8200536Abstract: The present invention provides an image display medium comprising a pair of substrates facing each other; and a particle group comprising two or more types of particles sealed in a space between the substrates, at least one of the two or more types of particles being positively chargeable by an external stimulus and at least one other of the two or more types of particles being negatively chargeable by an external stimulus, and the positively chargeable and negatively chargeable particles having, respectively, colors different from each other, wherein the positively chargeable and negatively chargeable particles have particle size distributions satisfying 0.4<Ds/Dl<0.9. Ds represents the particle size distribution of at least one type of particles charged with one polarity and Dl represents that of at least one other type of particles charged with the other polarity.Type: GrantFiled: June 17, 2004Date of Patent: June 12, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Yamamoto, Satoshi Hiraoka, Hidehiko Soyama, Takeshi Matsunaga
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Patent number: 8188073Abstract: The present invention relates to a compound, useful as a mineralocorticoid receptor-modulating agent, of the following formula [I]: wherein Ring A is a benzene ring optionally having a substituent(s) other than R1 etc, R1 is a group of the formula: RaSO2NH— etc, Ra is an alkyl group etc, R2 and R3 are each a hydrogen atom, a phenyl group, an optionally substituted alkyl group etc, X is an oxygen atom etc, Y is a group of the formula: —C(?O)— etc, Ar is an optionally substituted aryl group or an optionally substituted heteroaryl group, Q is a single bond, an alkylene group etc, or a pharmaceutically acceptable salt thereof.Type: GrantFiled: June 24, 2011Date of Patent: May 29, 2012Assignee: Mitsubishi Tanabe Pharma CorporationInventors: Toru Iijima, Yasuo Yamamoto, Hidenori Akatsuka, Takayuki Kawaguchi
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Patent number: 8189288Abstract: In a method for manufacturing a rotor hub for use in a spindle motor, free-cutting stainless steel is used as a material of the rotor hub. A slug of free-cutting stainless steel is subjected to a plastic working to form a disk mounting portion and a cylindrical surface positioned radially inwardly of the disk mounting portion. Then, a cylindrical disk fitting surface is formed by machining substantially the entirety of the cylindrical surface. The rotor hub contains A-type inclusions appearing in a cross section taken along a center axis of the disk mounting portion. The A-type inclusions are oriented in directions different than the center axis.Type: GrantFiled: October 23, 2008Date of Patent: May 29, 2012Assignees: Nidec Corporation, Tokusen Kogyo Co., Ltd.Inventors: Toshiaki Miyauchi, Yasuo Yamamoto
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Publication number: 20120068990Abstract: A display medium includes a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a polymer compound that is a copolymer containing the following constitutional unit (A) and constitutional unit (B): In the constitutional units (A) and (B), X represents a group containing a silicone chain, Ra1 and Ra2 each independently represent a hydrogen atom or a methyl group, Rb2 represents an organic group containing a substituted or unsubstituted phenyl group, n1 and n2 each represent mold of the constitutional unit relative to the whole copolymer and satisfy 0<n1<50 and 0<n2<80, respectively, and n represents a natural number of 1 or more and 3 or less.Type: ApplicationFiled: February 9, 2011Publication date: March 22, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Hiroaki MORIYAMA, Yasuo YAMAMOTO, Yoshinori MACHIDA, Ryota MIZUTANI
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Publication number: 20120069423Abstract: A display medium includes a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a polymer compound that is a copolymer containing the following constitutional unit (A) and constitutional unit (B): In the constitutional units (A) and (B), X represents a group containing a silicone chain, Ra1 and Ra2 each independently represent a hydrogen atom or a methyl group, Rb2 represents an organic group containing a fluorine atom, n1 and n2 each represent mol % of the constitutional unit relative to the whole copolymer and satisfy 0<n1<50 and 0<n2<50, respectively, and n represents a natural number of 1 or more and 3 or less.Type: ApplicationFiled: January 27, 2011Publication date: March 22, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Hiroaki MORIYAMA, Yasuo YAMAMOTO, Yoshinori MACHIDA, Ryota MIZUTANI
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Patent number: 8094365Abstract: White particles for display including first white particles that move in response to an electric field and second white particles that do not move in response to an electric field, the second white particles having a volume average particle size that is less than that of the first white particles, and a ratio of the numerical amount of the first white particles/the second white particles (L/S) satisfying the following relationship: 1/(5.1×107)?L/S?1/(2.8×104).Type: GrantFiled: September 2, 2009Date of Patent: January 10, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Yamamoto, Hiroaki Moriyama, Yoshinori Yamaguchi
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Publication number: 20110298835Abstract: A driving device of a display medium that including first and second particle groups migrating independently due to a first voltage being imparted for a first time period, forming aggregates due to the first voltage being imparted for a second time period, and the aggregates migrating due to a second voltage being imparted. The driving device includes a voltage imparting section that: imparts a third voltage that moves, to a display substrate side, a greater-amount-needed particle group for gradation display, in an amount of a difference between particles of the first particle group and second particle group needed for the display; when the greater-amount-needed particle group has an opposite polarity to the aggregates, imparts a fourth voltage that moves the aggregates needed to the display substrate side; and when the polarities are same, imparts a fifth voltage that moves the aggregates not needed to a rear substrate side.Type: ApplicationFiled: October 18, 2010Publication date: December 8, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Yoshinori MACHIDA, Hiroaki MORIYAMA, Yasuo YAMAMOTO