Patents Examined by Holly Rickman
  • Patent number: 11319455
    Abstract: Coating compositions including a binder agent are disclosed. The binder agent is formed of a fluorocopolymer and a non-fluorinated film-forming polymer. Methods of coating cables with the coating compositions are also described herein.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: May 3, 2022
    Assignees: General Cable Technologies Corporation, Arkema Inc.
    Inventors: Sathish Kumar Ranganathan, Srinivas Siripurapu, Vijay Mhetar, Ryan M. Andersen, Kurt Arthur Wood
  • Patent number: 11322175
    Abstract: A magnetic recording medium according to one embodiment includes an underlayer and a magnetic layer above the underlayer. The magnetic layer includes a first magnetic material and particulates. A solid protective layer is positioned above the magnetic layer, the protective layer including a second material. At least some of the particulates of the magnetic layer protrude completely through the protective layer. A method for forming a magnetic recording medium according to one embodiment includes forming a magnetic layer above a substrate, the magnetic layer including a first magnetic material and particulates, and forming a solid protective layer above the magnetic layer to a thickness whereby some of the particulates protrude through the protective layer and are exposed along an upper surface of the protective layer.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: May 3, 2022
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 11315710
    Abstract: An R—Fe—B base sintered magnet is provided consisting essentially of R (which is at least two rare earth elements and essentially contains Nd and Pr), M1 which is at least two of Si, Al, Mn, Ni, Cu, Zn, Ga, Ge, Pd, Ag, Cd, In, Sn, Sb, Pt, Au, Hg, Pb, and Bi, M2 which is at least one of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W, boron, and the balance of Fe, and containing an intermetallic compound R2(Fe,(Co))14B as a main phase. The magnet contains an R—Fe(Co)-M1 phase as a grain boundary phase, the R—Fe(Co)-M1 phase contains A phase which is crystalline with crystallites of at least 10 nm formed at grain boundary triple junctions, and B phase which is amorphous and/or nanocrystalline with crystallites of less than 10 nm formed at intergranular grain boundaries and optionally grain boundary triple junctions.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: April 26, 2022
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koichi Hirota, Tetsuya Kume, Masayuki Kamata
  • Patent number: 11308985
    Abstract: Fluoropolyether compounds that can be used as a lubricant, such as for magnetic recording media. The compounds have a terminal group that includes a phenol or benzene. The fluoropolyether compounds reduce the head to media distance while keeping comparable reliability in a hard disk drive compared to current industrial widely used fluoropolyether based lubricants.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: April 19, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Yu Lu, JiPing Yang, Jingyuan Zhuo, Qian Guo, Wen Liu
  • Patent number: 11279664
    Abstract: The present invention relates to a fluorine-containing ether compound represented by Formula (1), R1—R2—CH2—R3—CH2—R4??(1). (In Formula (1), R1 is an end group including an organic group having at least one double bond or triple bond, R2 is a divalent linking group bonded to R1 by etheric oxygen, R3 is a perfluoropolyether chain, R4 is an end group having two or three polar groups with each polar group being bonded to different carbon atoms, and the carbon atoms, to which the polar groups are bonded, being bonded to each other via a linking group including carbon atoms to which the polar groups are not bonded.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: March 22, 2022
    Assignee: SHOWA DENKO K.K.
    Inventors: Daisuke Yagyu, Yuta Yamaguchi, Naoya Fukumoto, Tsuyoshi Kato, Shoko Uetake, Hiroyuki Tomita, Ryuuta Miyasaka, Naoko Ito, Ichiro Ota, Katsumi Murofushi
  • Patent number: 11279800
    Abstract: The present invention concerns yarn comprising polymer, the polymer comprising imidazole groups, the yarn having a sulfur content of 0.01 to 3.0 percent by weight, based on weight of the yarn, the yarn having a tenacity of 30 cN/dtex (33.3 gpd) or higher.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 22, 2022
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Christopher William Newton, David J. Rodini, Joseph Lenning Lowery, Steven R. Allen, Vlodek Gabara
  • Patent number: 11276428
    Abstract: A magnetic recording medium is provided that includes a recording layer structure including a first magnetic recording layer, a second magnetic recording layer, a third magnetic recording layer, a fourth magnetic recording layer, and a plurality of nonmagnetic exchange coupling layers. The first magnetic recording layer is closest to a substrate and the fourth magnetic recording layer is farthest from the substrate. An amount of Co in the first magnetic recording layer is greater than or equal to the amount of Co in the second magnetic recording layer, the third magnetic recording layer, and the fourth magnetic recording layer.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: March 15, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventor: Yoshihiro Ikeda
  • Patent number: 11270727
    Abstract: In the magnetic tape cartridge, a tape has a tape thickness of 5.3 ?m or less, and a difference Winner?Wouter between a tape width Winner at a position of 50 m±1 m from a tape inner end and a tape width Wouter at a position of 50 m±1 m from a tape outer end is 4.1 ?m to 19.9 ?m as a value measured on 100th day from a date of magnetic tape cartridge manufacture, and a difference Ginner?Gouter between a servo band interval Ginner in a range of 49 m to 51 m from the tape inner end and a servo band interval Gouter in a range of 49 m to 51 m from the tape outer end is ?3.9 ?m to 0.0 ?m as a value measured on 100th day from the date of magnetic tape cartridge manufacture.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: March 8, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yuto Murata, Norihito Kasada, Yusuke Kagawa
  • Patent number: 11270729
    Abstract: A tape-shaped magnetic recording medium includes a base, a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder, and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder. In the magnetic recording medium, the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an average aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force Hc1 in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy the relation of Hc2/Hc1?0.8, the nonmagnetic layer has an average thickness of not more than 1.1 ?m, and the nonmagnetic powder has an average particle volume of not more than 2.0×10?5 ?m3.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: March 8, 2022
    Assignee: Sony Corporation
    Inventors: Masaru Terakawa, Minoru Yamaga, Katsunori Maeshima
  • Patent number: 11270726
    Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder, in which the ferromagnetic powder is an ?-iron oxide powder having an average particle size of 5.0 nm to 16.0 nm, a coercivity Hc in a vertical direction is 1,884 Oe to 3,141 Oe, a ten-point average roughness Rz of a surface of the magnetic layer is 35.0 nm to 45.0 nm, and a ratio Rp/Rz of a maximum peak height Rp of the surface of the magnetic layer to the Rz is 0.25 to 1.00.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: March 8, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Kenji Naoi
  • Patent number: 11257518
    Abstract: Provided is a magnetic tape cartridge of a single reel type in which a magnetic tape is wound around a reel, in which the magnetic tape includes a non-magnetic support and a magnetic layer containing a ferromagnetic powder, and has a tape thickness of 5.3 ?m or less, the magnetic layer includes a plurality of servo bands, and a difference (Ginner?Gouter) between a servo band interval Ginner in a range of 49 m to 51 m from a tape inner end and a servo band interval Gouter in a range of 49 m to 51 m from a tape outer end is ?3.9 ?m to ?1.1 ?m as a value measured on 100th day from a date of magnetic tape cartridge manufacture.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: February 22, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yuto Murata, Norihito Kasada, Yusuke Kagawa
  • Patent number: 11250881
    Abstract: The magnetic recording medium includes a non-magnetic support; a magnetic layer including a ferromagnetic powder on one surface of the non-magnetic support; and a back coating layer including a non-magnetic powder on the other surface of the non-magnetic support, in which a difference (Safter?Sbefore) between a spacing Safter measured by optical interferometry regarding a surface of the back coating layer after ethanol cleaning and a spacing Sbefore measured by optical interferometry regarding the surface of the back coating layer before ethanol cleaning is greater than 0 nm and equal to or smaller than 15.0 nm, and the non-magnetic support is an aromatic polyester support having a moisture absorption of 0.3% or less.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: February 15, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 11244782
    Abstract: An amorphous alloy magnetic core including a layered body in which amorphous alloy thin strips are layered one on another, the layered body having one end face and another end face in a width direction of the amorphous alloy thin strips, an inner peripheral surface and an outer peripheral surface orthogonal to a layering direction of the amorphous alloy thin strips, and a hole passing through from a part of the one end face as a starting point, the width direction corresponding to a depth direction of the hole.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: February 8, 2022
    Assignee: HITACHI METALS, LTD.
    Inventors: Hitoshi Kodama, Kengo Takahashi, Daichi Azuma
  • Patent number: 11244701
    Abstract: Provided is hexagonal strontium ferrite powder for magnetic recording, in which an activation volume is 800 to 1,500 nm3, a content of rare earth atom with respect to 100 atom % of iron atom is 0.5 to 5.0 atom %, and a rare earth atom surface portion uneven distribution is provided.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: February 8, 2022
    Assignee: FUJIFILM Cornoration
    Inventors: Kenji Naoi, Masashi Shirata
  • Patent number: 11244700
    Abstract: A magnetic recording medium includes a substrate, an underlayer provided on the substrate, and a magnetic layer provided on the underlayer and having a L10 structure and a (001) orientation. The magnetic layer has a granular structure in which an organic compound having a methylene skeleton or a methine skeleton is arranged at grain boundaries of magnetic grains.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: February 8, 2022
    Assignee: SHOWA DENKO K.K.
    Inventors: Katsumi Murofushi, Yoshitaka Ishibashi, Takayuki Fukushima, Kazuya Niwa, Lei Zhang, Yuji Murakami, Hisato Shibata, Takehiro Yamaguchi, Chen Xu, Tetsuya Kanbe, Tomoo Shige
  • Patent number: 11236446
    Abstract: Provided is a commingled yarn having a dispersing property and having a smaller amount of voids, a method for manufacturing the commingled yarn, and a weave fabric using the commingled yarn. The commingled yarn comprises a continuous thermoplastic resin fiber, a continuous reinforcing fiber, and a surface treatment agent and/or sizing agent, comprises the surface treatment agent and/or sizing agent in a content of 2.0% by weight or more, relative to a total amount of the continuous thermoplastic resin fiber and the continuous reinforcing fiber, and has a dispersibility of the continuous thermoplastic resin fiber and the continuous reinforcing fiber of 70% or larger.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: February 1, 2022
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Asami Nakai, Akio Ootani, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto, Jun Mitadera
  • Patent number: 11230797
    Abstract: The invention relates to a multifilament yarn containing n filaments, wherein the filaments are obtained by spinning an ultra-high molecular weight polyethylene (UHMWPE), said yarn having a tenacity (Ten) as expressed in cN/dtex of Ten(cN/dtex)=f×n?0.05×dpf?0.15, wherein Ten is at least 39 cN/dtex, n is at least 25, f is a factor of at least 58 and dpf is the dtex per filament.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: January 25, 2022
    Assignee: DSM IP ASSETS B.V.
    Inventors: Jacobus Johannes Mencke, Johannes Hendrikus Marie Heijnen, Harm Van Der Werff
  • Patent number: 11202739
    Abstract: The present invention relates to red effect pigments including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one of metal oxide, metal hydroxide or metal oxide hydrate, the metal ions of the metal oxide, metal hydroxide and/or metal oxide hydrate comprise at least two different metal ions selected from the group of metals consisting of Fe, Sn, Ti and Zr, and to a process for production thereof and to the use of the red effect pigments.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 21, 2021
    Inventors: Michael Grüner, Günter Kaupp, Ralph Schneider
  • Patent number: 11189406
    Abstract: Magnetic powder includes: an epsilon-phase iron oxide-based compound selected from ?-Fe2O3 or a compound represented by Formula (1). The magnetic powder has an average particle diameter of 8 nm to 25 nm, a ratio of Hc to Hc? of from 0.6 to 1.0, and Hc? satisfying Expression (II). Hc? represents a magnetic field at which a value of Expression (I) becomes zero in a magnetic field-magnetization curve obtained by performing measurement at a maximum applied magnetic field of 359 kA/m, a temperature of 296 K, and a magnetic field sweeping speed of 1.994 kA/m/s. M represents magnetization and H represents applied magnetic field. Hc represents a magnetic field at which magnetization becomes zero in the magnetic field-magnetization curve. 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: Grant
    Filed: May 31, 2018
    Date of Patent: November 30, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Takashi Fujimoto
  • Patent number: 11138997
    Abstract: A multilayer exchange spring recording media consist of a magnetically hard magnetic storage layer strongly exchange coupled to a softer nucleation host. The strong exchange coupling can be through a coupling layer or direct. The hard magnetic storage layer has a strong perpendicular anisotropy. The nucleation host consists of one or more ferromagnetic coupled layers. For a multilayer nucleation host the anisotropy increases from layer to layer. The anisotropy in the softest layer of the nucleation host can be two times smaller than that of the hard magnetic storage layer. The lateral exchange between the grains is small. The nucleation host decreases the coercive field significantly while keeping the energy barrier of the hard layer almost unchanged. The coercive field of the total structure depends on one over number of layers in the nucleation host. The invention proposes a recording media that overcomes the writeability problem of perpendicular recording media.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: October 5, 2021
    Inventor: Dieter Suess