Patents by Inventor Yusuke Hasegawa
Yusuke Hasegawa 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: 20170160662Abstract: Provided is a toner containing a toner particle including a binder resin, a wax, and a colorant. The softening point of the toner is at least 80° C. and not more than 140° C. The average circularity of the toner is at least 0.940. The integrated value of stress in the toner at 150° C. which is measured by using a tackiness tester is at least 78 g·m/sec.Type: ApplicationFiled: November 28, 2016Publication date: June 8, 2017Inventors: Yuujirou Nagashima, Yusuke Hasegawa, Tomohisa Sano, Yoshitaka Suzumura, Satoshi Arimura, Kozue Uratani
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Patent number: 9658548Abstract: The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on thType: GrantFiled: August 5, 2016Date of Patent: May 23, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Michihisa Magome, Tadashi Dojo, Yusuke Hasegawa
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Publication number: 20170120829Abstract: An electronic mirror apparatus includes: a display unit having a display screen, a mirror disposed over the screen, a drive mechanism for changing an angle of the mirror, and a controller. The controller is electrically coupled with the display unit, the drive mechanism, an illuminance sensor for monitoring illuminance of light incident from a vehicle's rearward direction, and a camera for shooting a rearward view. The controller, when the display unit is OFF and the vehicle is in a dark environment, monitors the illuminance of the light incident from the rearward direction, based on an output of the sensor. The controller, when the illuminance of the light becomes equal to or larger than a threshold value, instructs the drive mechanism to adjust the angle of the mirror to an antiglare angle and instructs the display unit to display an image that is shot by the camera and regulated in luminance.Type: ApplicationFiled: January 28, 2016Publication date: May 4, 2017Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: YUSUKE HASEGAWA, YUJI MATSUMOTO
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Patent number: 9625841Abstract: A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein a ratio of coverage of the magnetic toner particles' surface by the inorganic fine particles is in a prescribed range for the magnetic toner, the inorganic fine particles contain prescribed metal oxide fine particles, with at least 85 mass % of the metal oxide fine particles being silica fine particles, the coefficient of variation on the coverage ratio A is in a prescribed range, the binder resin contains a styrene resin, in a GPC measurement of a THF-soluble matter in the magnetic toner, a peak molecular weight (Mp) of a main peak is in a prescribed range, and a prescribed fatty acid ester compound is incorporated as a release agent.Type: GrantFiled: July 22, 2016Date of Patent: April 18, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Shuichi Hiroko, Michihisa Magome, Yusuke Hasegawa, Yoshitaka Suzumura
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Patent number: 9625842Abstract: A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the reType: GrantFiled: July 22, 2016Date of Patent: April 18, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Kozue Uratani, Michihisa Magome, Yusuke Hasegawa, Shuichi Hiroko
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Publication number: 20160378003Abstract: Provided is a toner having improved durability. The magnetic toner includes magnetic toner particles each containing a binder resin and a magnetic material, in which a deformation amount when a load of 9.8×10?4 N is applied to one particle of the magnetic toner in a microcompression test is 3.0 ?m or less, in which the magnetic toner has a surface free energy of 5 mJ/m2 or more and 20 mJ/m2 or less, and in which the magnetic toner has a melt viscosity ?? at 100° C. of 5.0×103 Pa·s or more and 1.0×105 Pa·s or less.Type: ApplicationFiled: June 24, 2016Publication date: December 29, 2016Inventors: Satoshi Arimura, Yusuke Hasegawa, Tomohisa Sano, Yoshitaka Suzumura, Kozue Uratani, Yuujirou Nagashima
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Publication number: 20160342100Abstract: The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on thType: ApplicationFiled: August 5, 2016Publication date: November 24, 2016Inventors: Michihisa Magome, Tadashi Dojo, Yusuke Hasegawa
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Publication number: 20160334723Abstract: A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the reType: ApplicationFiled: July 22, 2016Publication date: November 17, 2016Inventors: Kozue Uratani, Michihisa Magome, Yusuke Hasegawa, Shuichi Hiroko
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Publication number: 20160327881Abstract: A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein a ratio of coverage of the magnetic toner particles' surface by the inorganic fine particles is in a prescribed range for the magnetic toner, the inorganic fine particles contain prescribed metal oxide fine particles, with at least 85 mass % of the metal oxide fine particles being silica fine particles, the coefficient of variation on the coverage ratio A is in a prescribed range, the binder resin contains a styrene resin, in a GPC measurement of a THF-soluble matter in the magnetic toner, a peak molecular weight (Mp) of a main peak is in a prescribed range, and a prescribed fatty acid ester compound is incorporated as a release agent.Type: ApplicationFiled: July 22, 2016Publication date: November 10, 2016Inventors: Shuichi Hiroko, Michihisa Magome, Yusuke Hasegawa, Yoshitaka Suzumura
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Patent number: 9454096Abstract: A magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the magnetic toner has a coverage ratio A and a coverage ratio B/coverage ratio A in prType: GrantFiled: December 26, 2012Date of Patent: September 27, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Yusuke Hasegawa, Tadashi Dojo, Michihisa Magome
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Publication number: 20160266509Abstract: The toner has a toner particle that contains a binder resin, a colorant, a release agent, and a crystalline polyester, wherein the release agent contains an ester wax, and the peak top temperature of the maximum endothermic peak of the ester wax as measured with a differential scanning calorimeter is from 65° C. to 85° C., the ester wax satisfies specific conditions and the crystalline polyester satisfies specific conditions, the toner contains from 3.0 parts by mass to 20.0 parts by mass of the crystalline polyester per 100 parts by mass of the binder resin, and the mass ratio of the ester wax to crystalline polyester is from 25/75 to 75/25.Type: ApplicationFiled: February 24, 2016Publication date: September 15, 2016Inventors: Tomohisa Sano, Yusuke Hasegawa, Yoshitaka Suzumura, Yuujirou Nagashima, Kozue Uratani
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Patent number: 9423710Abstract: The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particle' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on theType: GrantFiled: December 26, 2012Date of Patent: August 23, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Michihisa Magome, Tadashi Dojo, Yusuke Hasegawa
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Patent number: 9423711Abstract: A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the reType: GrantFiled: January 31, 2013Date of Patent: August 23, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Kozue Uratani, Michihisa Magome, Yusuke Hasegawa, Shuichi Hiroko
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Patent number: 9417542Abstract: A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein a ratio of coverage of the magnetic toner particles' surface by the inorganic fine particles is in a prescribed range for the magnetic toner, the inorganic fine particles contain prescribed metal oxide fine particles, with at least 85 mass % of the metal oxide fine particles being silica fine particles, the coefficient of variation on the coverage ratio A is in a prescribed range, the binder resin contains a styrene resin, in a GPC measurement of a THF-soluble matter in the magnetic toner, a peak molecular weight (Mp) of a main peak is in a prescribed range, and a prescribed fatty acid ester compound is incorporated as a release agent.Type: GrantFiled: December 26, 2012Date of Patent: August 16, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Shuichi Hiroko, Michihisa Magome, Yusuke Hasegawa, Yoshitaka Suzumura
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Patent number: 9372424Abstract: A magnetic toner contains magnetic toner particles and silica fine particles. The magnetic toner has a thermal conductivity in the range of 0.230 to 0.270 W/(m·K). Primary particles of the silica fine particles have a number-average particle diameter (D1) in the range of 5 to 20 nm. The coverage X1 of the magnetic toner surface by the silica fine particles ranges from 40% to 75% by area as determined using an X-ray photoelectron spectrometer (ESCA). The diffusion index (X1/X2) satisfies the following formula: Diffusion index??0.0042×X1+0.62 wherein X2 denotes the theoretical coverage of the magnetic toner surface by the silica fine particles.Type: GrantFiled: December 11, 2014Date of Patent: June 21, 2016Assignee: Canon Kabushiki KaishaInventors: Takashi Matsui, Yusuke Hasegawa, Shuichi Hiroko, Yoshitaka Suzumura, Atsuhiko Ohmori, Keisuke Tanaka
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Patent number: 9244371Abstract: A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, as described in the specification. The coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and the coverage ratio by the inorganic fine particles fixed to the magnetic toner particles' surface reside in a prescribed relationship, the binder resin contains a polyester resin, the release agent contains an ester compound, and an endothermic peak for the magnetic toner has a prescribed value.Type: GrantFiled: December 26, 2012Date of Patent: January 26, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Yoshitaka Suzumura, Yusuke Hasegawa, Michihisa Magome, Kozue Uratani
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Patent number: 9239528Abstract: A toner comprising toner particles which comprise a binder resin and a colorant, and also inorganic fine particles as external additives, wherein the inorganic fine particles are silica fine particles and a group 2 element titanate fine particles, the inorganic fine particles have specific particle diameters, the silica fine particles have a coverage ratio X1 on the surfaces of the toner particles, which is not less than 40.0 surface area % and not more than 75.0 surface area %, when the theoretical coverage ratio by the silica fine particles is X2, the diffusion index defined as “diffusion index=X1/X2” satisfies the condition: diffusion index??0.0042×X1+0.62, and the external additives have an embedding ratio on the toner particles, which satisfies a specific range.Type: GrantFiled: June 13, 2014Date of Patent: January 19, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Yusuke Hasegawa, Takashi Matsui, Shuichi Hiroko, Yoshitaka Suzumura, Atsuhiko Ohmori, Keisuke Tanaka
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Patent number: 9235151Abstract: A magnetic toner containing: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles, as described in the specification, present on the surface of the magnetic toner particles. A coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles, as described in the specification, and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles each of which is fixed to the magnetic toner particles' surface, as described in the specification, have prescribed values and a prescribed relationship in the magnetic toner. The alumina fine particles and/or titania fine particles are present on the surface of the magnetic toner particles as described in the specification.Type: GrantFiled: January 31, 2013Date of Patent: January 12, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Keisuke Tanaka, Michihisa Magome, Yusuke Hasegawa, Tomohisa Sano
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Patent number: 9217943Abstract: The magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles. The coverage ratio of the magnetic toner particle surface by the inorganic fine particles resides in a prescribed range for this magnetic toner; the binder resin is a styrene resin; the weight-average molecular weight and radius of gyration of the magnetic toner reside in a prescribed relationship; and the viscosity of the magnetic toner at 110° C. resides in a prescribed range.Type: GrantFiled: December 26, 2012Date of Patent: December 22, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Takashi Matsui, Yusuke Hasegawa, Shotaro Nomura, Michihisa Magome
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Patent number: 9213251Abstract: The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise strontium titanate fine particles and metal oxide fine particles, and the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the magnetic toner has a characteristic state of coverage, by the inorganic fine particles, of the magnetic toner particle surface, and the ratio [D4/D1] of the weight-average particle diameter (D4) to the number-average particle diameter (D1) is in a prescribed range.Type: GrantFiled: January 31, 2013Date of Patent: December 15, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Atsuhiko Ohmori, Michihisa Magome, Yusuke Hasegawa, Keisuke Tanaka