Patents Examined by Holly Rickman
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Patent number: 11037591Abstract: A heat-assisted magnetic recording medium includes: a substrate; an underlayer; and a magnetic layer including an alloy having an L10 structure, wherein the underlayer includes, from the substrate side, a bcc underlayer including a substance having a bcc structure, a first oxide layer that is in contact with the bcc underlayer, and a second oxide layer that is in contact with the magnetic layer. The bcc underlayer, the first oxide layer, and the second oxide layer are stacked in the recited order. The first oxide layer and the second oxide layer include magnesium oxide, and the second oxide layer further includes one or more compounds selected from the group consisting of vanadium oxide, vanadium nitride, and vanadium carbide.Type: GrantFiled: June 6, 2019Date of Patent: June 15, 2021Assignee: SHOWA DENKO K.K.Inventors: Lei Zhang, Chen Xu, Takayuki Fukushima, Kazuya Niwa, Tetsuya Kanbe, Hisato Shibata, Takehiro Yamaguchi, Tomoo Shige
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Patent number: 11024441Abstract: The present invention aims to provide and insulated wire having an insulation layer which is excellent in insulation properties and has a low dielectric constant. The insulated wire of the present invention includes a conductor (A) and an insulation layer (B) formed around the periphery of the conductor (A). The insulation layer (B) is formed from a resin composition containing an aromatic polyether ketone resin (I) and a fluororesin (II). The fluororesin (II) is a copolymer of tetrafluoroethylene and a perfluoroethylenic unsaturated compound represented by the following formula (1): CF2?CF—Rf1??(1) wherein Rf1 represents —CF3 or —ORf2, and Rf2 is a C1-C5 perfluoroalkyl group. The aromatic polyether ketone resin (I) and the fluororesin (II) satisfy a melt viscosity ratio (I)/(II) of 0.3 to 5.0.Type: GrantFiled: November 29, 2012Date of Patent: June 1, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Haruhisa Masuda, Yuki Adachi
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Patent number: 11017809Abstract: A magnetic recording medium includes a layer structure including a magnetic layer, a base layer, and a back layer in this order, in which an average thickness tT is tT?5.5 ?m, a dimensional variation ?w in a width direction to tension change in a longitudinal direction is 660 ppm/N??w, and a surface roughness Rabe of the base layer on a side of the back layer is 4.2 nm?Rabe?8.5 nm.Type: GrantFiled: June 27, 2019Date of Patent: May 25, 2021Assignee: Sony CorporationInventors: Minoru Yamaga, Noboru Sekiguchi
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Patent number: 11011200Abstract: This fluorine-containing ether compound is represented by Formula (1). R1—R2—CH2—R3—CH2—R4—R5??(1) (in Formula (1), R1 is an aryl group or an aralkyl group, R2 is a divalent linking group having 0 or 1 polar group, R3 is a perfluoropolyether chain, R4 is a divalent linking group having 2 or 3 polar groups, and R5 is an aryl group or an aralkyl group.Type: GrantFiled: July 3, 2017Date of Patent: May 18, 2021Assignee: SHOWA DENKO K.K.Inventors: Shoko Uetake, Naoya Fukumoto, Daisuke Yagyu, Yuta Yamaguchi, Naoko Ito, Hiroyuki Tomita, Ryuta Miyasaka, Katsumi Murofushi
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Patent number: 10982353Abstract: A yarn comprising a plurality of bicomponent filaments having a first region comprising a first polymer composition and a second region comprising a second polymer composition; the regions being distinct and present in the bicomponent filaments in a sheath-core structure or a side-by-side structure; wherein the first polymer composition comprises aramid polymer containing 0.5 to 20 weight percent homogeneously dispersed discrete carbon particles and the second polymer composition comprises aramid polymer being free of discrete carbon particles and having at least one homogeneously dispersed masking pigment, the yarn having a total content of 0.5 to 5 weight percent discrete carbon particles.Type: GrantFiled: August 4, 2017Date of Patent: April 20, 2021Assignee: DUPONT SAFETY & CONSTRUCTION, INC.Inventors: Mark William Andersen, Mark T. Aronson, Christopher William Newton, Thomas Wayne Steinruck, B Lynne Wiseman, Reiyao Zhu
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Patent number: 10971182Abstract: Magnetic powder includes: at least one epsilon-phase iron oxide-based compound selected from the group consisting of ?-Fe2O3 and a compound represented by Formula (1); and a surface treatment layer including a silane compound on at least a part of a surface. The magnetic powder has an average particle diameter of 8 nm to 20 nm. The content ratio of carbon atoms of the silane compound included in the surface treatment layer to iron atoms of the at least one epsilon-phase iron oxide-based compound selected from the group consisting of ?-Fe2O3 and the compound represented by Formula (1) is 0.05% to 0.5% in terms of the number of atoms. A manufacturing method thereof and applications thereof are also provided. In Formula (1), A represents at least one metal element other than Fe and a represents a number that satisfies a relationship of 0<a<2.Type: GrantFiled: May 30, 2018Date of Patent: April 6, 2021Assignee: FUJIFILM CorporationInventor: Takashi Fujimoto
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Patent number: 10964444Abstract: The present invention aims to provide a resin composition which can provide a molded article excellent in insulation and showing a low relative permittivity and which causes no melt fracture even when extrusion-molded at a high shear rate. The resin composition of the present invention includes an aromatic polyether ketone resin (I) and a fluororesin (II). The fluororesin (II) is a copolymer of tetrafluoroethylene and a perfluoro ethylenically unsaturated compound represented by the following formula (1): CF2?CF—Rf1??(1) wherein Rf1 represents —CF3 or —ORf2; and Rf2 represents a C1-C5 perfluoroalkyl group. The aromatic polyether ketone resin (I) and the fluororesin (II) satisfy a melt viscosity ratio (I)/(II) of not lower than 0.001 but lower than 0.3.Type: GrantFiled: July 24, 2014Date of Patent: March 30, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yuki Ueda, Masami Nishiumi, Haruhisa Masuda
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Patent number: 10950365Abstract: An insulated wire includes a conductor, a first insulation coating layer which is provided directly on the conductor and includes a polyamide-imide resin including dispersed inorganic fine particles, and a second insulation coating layer which is provided on the outer circumference of the first insulation coating layer and includes a polyamide-imide resin or a polyimide resin. A minimum winding multiplied diameter that does not cause a crack in the first insulation coating layer when the insulated wire is elongated by 30% by a method in compliance with JISC 3216 “5.1.1” and is wound around a winding bar is greater than 2d but smaller than 4d (where d is a conductor diameter of the insulated wire).Type: GrantFiled: September 5, 2014Date of Patent: March 16, 2021Assignee: HITACHI METALS, LTD.Inventors: Hidehito Hanawa, Hideyuki Kikuchi
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Patent number: 10947644Abstract: Provided are a C-shaped composite fiber, a C-shaped hollow fiber using the same, a fabric including the C-shaped composite fiber and/or the C-shaped hollow fiber, and a manufacturing method of the C-shaped composite fiber, the C-shaped hollow fiber, and/or the fabric, and more particularly, to a C-shaped composite fiber which has excellent strength and elongation together with improved hollowness, so that there is little deformation of the composite fiber and/or the hollow fiber in the manufacturing process thereof, quality degradation of the hollow fiber is minimized in the elution process thereof, a weight reduction process in a fabric state is not required when manufacturing the fabric, and the manufactured fabric has excellent warmth and lightness, a C-shaped hollow fiber using the same, a fabric including the C-shaped composite fiber and/or the C-shaped hollow fiber, and a manufacturing method of the C-shaped composite fiber, the C-shaped hollow fiber, and/or the fabric.Type: GrantFiled: August 1, 2014Date of Patent: March 16, 2021Assignee: TORAY ADVANCED MATERIALS KOREA INC.Inventors: Dong Won Kim, Jin Suk Ma, Hyoun Soo Lee, Mi Nam Choi, Ho Keun Kim, Jae Wook Hong
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Patent number: 10937457Abstract: There is provided a magnetic recording medium of which an average thickness tT is tT?5.6 ?m, a dimensional change amount ?w in a width direction with respect to a change in tension in a longitudinal direction is 660 ppm/N??w, a squareness ratio in a vertical direction is 65% or more, and a width deformation coefficient b during long-term storage in a case where a long-term storage width change amount Y is defined as Y=blog(t) is ?0.06 ?m?b?0.06 ?m.Type: GrantFiled: July 12, 2019Date of Patent: March 2, 2021Assignee: Sony CorporationInventors: Minoru Yamaga, Noboru Sekiguchi, Tooru Sato, Takashi Aizawa
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Patent number: 10937456Abstract: The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on one surface of a nonmagnetic support and has a backcoat layer containing nonmagnetic powder and binder on the other surface thereof, wherein the thickness of the backcoat layer is less than or equal to 0.20 ?m, the contact angle for 1-bromonaphthalene that is measured on the surface of the backcoat layer falls within a range of 10.0° to 30.0°, and the contact angle for 1-bromonaphthalene that is measured on the surface of the magnetic layer falls within a range of 45.0° to 55.0°.Type: GrantFiled: February 27, 2017Date of Patent: March 2, 2021Assignee: FUJIFILM CorporationInventors: Norihito Kasada, Takuto Kurokawa, Masahito Oyanagi
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Patent number: 10930313Abstract: According to one embodiment, a magnetic recording medium includes: a substrate; and a magnetic recording layer structure formed above the substrate. The magnetic recording layer structure includes five or more magnetic recording layers and four or more nonmagnetic exchange coupling layers, where the magnetic recording layers and the nonmagnetic exchange coupling layers are arranged in an alternating pattern, and where the magnetic recording layers are separated from each other by least one of the nonmagnetic exchange coupling layers. The magnetic recording layer positioned closest to the substrate has each of the following: an average magnetic grain pitch of about 8.3 nm or less, a magnetic anisotropy field (Hk) value of greater than or equal to about 20 kOe, and a thickness that is about 40% of a total thickness of the magnetic recording layer structure.Type: GrantFiled: March 6, 2018Date of Patent: February 23, 2021Assignee: Western Digital Technologies, Inc.Inventor: Yoshihiro Ikeda
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Patent number: 10923148Abstract: There is provided a magnetic recording medium which has a layer structure including a magnetic layer and a base layer, and of which an average thickness tT is tT?5.6 ?m, a dimensional change amount ?w in a width direction with respect to a change in tension in a longitudinal direction is 660 ppm/N??w, a servo pattern is recorded on the magnetic layer, a standard deviation ?PES of a position error signal (PES) value obtained from a servo signal in which the servo pattern is reproduced is ?PES?25 nm, and a maximum value ?1M of a friction coefficient ?1 between a surface on a side of the magnetic layer and an LTO3 head in a case where measurement of the friction coefficient ?1 is performed 250 times is 0.04??1M?0.5.Type: GrantFiled: November 14, 2019Date of Patent: February 16, 2021Assignee: Sony CorporationInventors: Taikei Enomoto, Masaru Terakawa, Minoru Yamaga
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Patent number: 10923147Abstract: Magnetic media including a magnetic recording layer structure of at least six magnetic recording sublayers and at least six non-magnetic exchange control sublayers in an alternating pattern are provided. The magnetic recording layer structure includes a gradient of platinum content across the magnetic recording sublayers such that a top magnetic recording sublayer has a lowest platinum content and a bottom magnetic recording sublayer has a highest platinum content. In one such case, the magnetic media includes a substrate and the magnetic recording layer structure on the substrate. In another case, a method of fabricating such magnetic media is provided.Type: GrantFiled: April 20, 2018Date of Patent: February 16, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Kai Tang, Arien Michael Ghaderi, Tuqiang Li, Chi Ho Lo
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Patent number: 10889917Abstract: A spinneret is used to reduce filament breakage during spinning of multifilament yarn being stretched at a high stretch ratio. The spinneret has a first group of spinning holes with capillaries and a second group of spinning holes with capillaries. The capillaries of the second group of spinning holes have a lower length to diameter (L/D) ratio than the capillaries of the first group of spinning holes. All of the capillaries have the same diameter, which is 100 ?m or less.Type: GrantFiled: October 2, 2012Date of Patent: January 12, 2021Assignee: TEIJIN ARAMID B.V.Inventors: Leonardus Antonius Godfried Busscher, Michiel Jan Adriaan Jaarsveld
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Patent number: 10096333Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer further comprises carbon black, and a state in which the carbon black is present, as observed in a reflection electron image of a surface of the magnetic layer obtained by a scanning electron microscope, satisfies condition 1 and condition 2 below: condition 1: a number of carbon black particles with a particle size of greater than or equal to 140 nm is greater than or equal to 30 per 1,000 ?m2 of area; and condition 2: a number of carbon black particles with a particle size of greater than or equal to 220 nm is less than or equal to 10 per 1,000 ?m2 of area.Type: GrantFiled: June 30, 2015Date of Patent: October 9, 2018Assignee: FUJIFILM CorporationInventors: Yoshinori Tamada, Masahide Sato, Kazufumi Omura
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Patent number: 10079036Abstract: A magnetic recording medium 11 in which the outermost surface of a protective layer 3 on a lubricant layer 4 side contains carbon and nitrogen of 10 atomic % to 90 atomic %, the lubricant layer 4 is formed by being in contact with the outermost surface, and contains a compound A of Formula (1) and a compound B of Formula (2), a mass ratio (A/B) of the compound A with respect to the compound B is 0.2 to 0.3, the average molecular weights of the compounds A and B are 1,500 to 2,000 and 1,300 to 2,400, respectively, and the average film thickness is 0.5 nm to 2 nm. R1-C6H4OCH2CH(OH)CH2OCH2—R2-CH2OCH2CH(OH)CH2OH ??(1) (R1 is an alkoxy group having 1 to 4 carbon atoms. R2 is —CF2O(CF2CF2O)x(CF2O)yCF2—).Type: GrantFiled: July 6, 2016Date of Patent: September 18, 2018Assignee: SHOWA DENKO K.K.Inventors: Satoru Nakamura, Taining Hung, Evance Kuo, Daizo Endo
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Patent number: 10074396Abstract: In a magnetic recording medium of the present invention, an outermost surface of a protective layer 3 on a lubricant layer 4 side contains carbon and nitrogen in a range of 50 atomic % to 90 atomic %, and the lubricant layer 4 is formed by being in contact with the outermost surface, contains compounds A to C represented in the below general formulas (1) to (3) described below, and has a film thickness of 0.5 nm to 2 nm.Type: GrantFiled: September 14, 2016Date of Patent: September 11, 2018Assignee: SHOWA DENKO K.K.Inventors: Eishin Yamakawa, Katsuaki To, Saeko Hayase
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Patent number: 10068603Abstract: A magnetic recording medium includes a nonmagnetic substrate and at least a magnetic layer, a protective layer, and a lubricating layer provided on the nonmagnetic substrate. The magnetic recording medium is characterized in that the lubricating layer is formed of a lubricating agent represented by general formulas (1), (2) or (3), in which substituents R1, R2, R3, and R4 in the lubricating agent represent organic groups, at least one of the substituents R1 and R2 at the end part of the lubricating agent and the substituents R3 and R4 contain a plurality of functional groups, and the shortest distance between the functional groups is a distance of three or more atoms, preferably five atoms. The magnetic recording medium may be used for a heat assisted recording method in which the temperature of the magnetic layer reaches 150° C. to 200° C.Type: GrantFiled: September 12, 2008Date of Patent: September 4, 2018Assignee: FUJI ELECTRIC CO., LTD.Inventors: Kunihiro Imai, Takako Matsumoto, Takeshi Watanabe, Akira Furuta, Kazuhiro Kusakawa, Masami Kuroda
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Patent number: 10056102Abstract: According to one embodiment, a magnetic recording medium including a substrate and a magnetic recording layer formed on the substrate and including a plurality of projections is obtained. The array of the plurality of projections includes a plurality of domains in which the projections are regularly arranged, and a boundary region between the domains, in which the projections are irregularly arranged. The boundary region is formed along a perpendicular bisector of a line connecting the barycenters of adjacent projections.Type: GrantFiled: November 24, 2015Date of Patent: August 21, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Kaori Kimura, Kazutaka Takizawa, Akira Watanabe, Takeshi Iwasaki, Akihiko Takeo