Patents Examined by Holly C Rickman
  • Patent number: 10906908
    Abstract: A lubricating agent including an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B), wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms and the difference between the pKa value of the Bronsted acid in water and the pKa value of the Bronsted base in water is 12 or more.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: February 2, 2021
    Assignee: DEXERIALS CORPORATION
    Inventors: Hirofumi Kondo, Kouki Hatsuda, Nobuo Tano, Makiya Ito, Kyungsung Yun, Masayoshi Watanabe
  • Patent number: 10896693
    Abstract: A stack comprises a substrate, a magnetic recording layer, and a negative thermal expansion layer disposed between the substrate and the magnetic recording layer. The negative thermal expansion layer is configured to reduce thermal profile changes of a surface of the stack opposite the substrate during a heat assisted magnetic recording write operation.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 19, 2021
    Assignee: Seagate Technology LLC
    Inventors: Lihong Zhang, Xiong Liu, Hongbo Wang, Xinwei Li
  • Patent number: 10896692
    Abstract: 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, and 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°.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 19, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Takuto Kurokawa, Norihito Kasada, Masahito Oyanagi
  • Patent number: 10882923
    Abstract: There are provided low-substituted hydroxypropyl cellulose (L-HPC) having good compressibility and capping-prevention performance, and others. Specifically, provided are L-HPC having a hydroxypropoxy content of 5 to 16% by weight, a volume fraction of long fibrous particles of 20 to 40% and a volume fraction of short fibrous particles of 26 to 60% with the proviso that the latter is greater than the former; and a solid preparation containing the L-HPC. Also provided is a method for producing the L-HPC including the steps of: bringing powdery pulp having a length-weighted mean width of 10 to 25 ?m into contact with an alkali metal hydroxide solution, reacting the alkali cellulose with propylene oxide, and neutralizing the alkali metal hydroxide present in the reaction product with an acid to precipitate crude low-substituted hydroxypropyl cellulose in the absence of a step of dissolving a portion or all of the reaction product.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: January 5, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Yasuyuki Hirama
  • Patent number: 10886044
    Abstract: A rare earth permanent magnet that is high in residual magnetization and coercivity is obtained and includes R and T. A main phase of crystal grains having an Nd5Fe17 type crystal structure is included. In an X-ray diffraction profile drawn by performing an XRD measurement for a rare earth permanent magnet, peaks of detected intensity are present in specific ranges. In which the detected intensity of the peak with the highest detected intensity in the range of 41.60°<2?(°)<42.80° is set as ?, the detected intensity of the peak with the highest detected intensity in the range of 34.38°<2?(°)<34.64° is set as ?, and the detected intensity of the peak with the highest detected intensity in the range of 38.70°<2?(°)<41.20° is set as ?, 0.38<?/?<0.70 and 0.45<?/?<0.70 are established. The peak with the highest detected intensity in the range of 34.38°<2?(°)<34.64° is a peak derived from the Nd5Fe17 type crystal structure.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: January 5, 2021
    Assignee: TDK CORPORATION
    Inventors: Masashi Ito, Eiichiro Fukuchi
  • Patent number: 10878845
    Abstract: The magnetic tape includes a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which a thickness of the back coating layer is equal to or smaller than 0.30 ?m, and an isoelectric point of a surface zeta potential of the back coating layer is equal to or smaller than 3.0.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: December 29, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 10875986
    Abstract: Graphene fibers made from a graphene film formed into an elongated fiber-like shape and composite materials made from the graphene fibers. The graphene film has amine groups formed on at least an outer surface of the graphene film and epoxide groups formed on at least one edge of the graphene film. The amine groups are formed in a functionalized area on the outer surface of the graphene film that is within about 10 microns from the at least one edge of the graphene film, or the functionalized area may extend the entire width of the graphene film. The graphene film may also have holes formed through the graphene film. The elongated fiber-like shapes may be the graphene film in a rolled spiral orientation or the graphene film in a twisted formation.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: December 29, 2020
    Assignee: The Boeing Company
    Inventors: Keith Daniel Humfeld, Kenneth H. Griess
  • Patent number: 10858730
    Abstract: A method for forming a multilayer thin film exhibiting perpendicular magnetic anisotropy includes alternately sputtering a CoFeSiB target and a Pd target inside a vacuum chamber to form a [CoFeSiB/Pd] multilayer thin film on a substrate disposed inside the vacuum chamber. The number of times the [CoFeSiB/Pd] multilayer thin film is stacked may be 3 or more.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: December 8, 2020
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Young Keun Kim, Yong Jin Kim
  • Patent number: 10861491
    Abstract: The magnetic tape has a magnetic layer containing ferromagnetic powder, abrasive, and binder on a nonmagnetic support, wherein the centerline average surface roughness Ra measured on the surface of the magnetic layer is less than or equal to 1.8 nm, the contact angle for 1-bromonaphthalene that is measured on the surface of the magnetic layer falls within a range of 45.0° to 60.0°, and the coefficient of friction that is measured on the base portion of the surface of the magnetic layer is less than or equal to 0.35.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: December 8, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Masahito Oyanagi, Norihito Kasada, Takuto Kurokawa
  • Patent number: 10847181
    Abstract: The purpose of the present invention is to provide a perpendicular magnetic recording medium which uses an Ru seed layer having a (002)-oriented hcp structure, and has a magnetic recording layer including a (001)-oriented L10 ordered alloy suitable to perpendicular magnetic recording. The magnetic recording medium of the present invention includes a substrate, a first seed layer containing Ru, a second seed layer containing ZnO, a third seed layer containing MgO, and a magnetic recording layer containing an ordered alloy, in this order, the first seed layer having the (002)-oriented hexagonal closest packed structure.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: November 24, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Shinji Uchida, Hitoshi Nakata, Tomohiro Moriya, Akira Furuta, Takehito Shimatsu
  • Patent number: 10803897
    Abstract: A magnetic recording medium includes a nonmagnetic support body, and a magnetic layer containing magnetic powder, in which the magnetic powder contains ?:Fe2O3 crystal (including a case of substituting a portion of Fe site with a metal element M), a product of residual magnetization and a thickness of the magnetic layer is from 0.5 mA to 6.0 mA, and a squareness ratio which is measured in a longitudinal direction of the magnetic layer is 0.3 or less.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: October 13, 2020
    Assignee: Sony Corporation
    Inventors: Masaru Terakawa, Yoichi Kanemaki, Minoru Yamaga
  • Patent number: 10803895
    Abstract: A magnetic recording medium includes: a substrate; a first underlayer; a second underlayer; and a magnetic layer including an alloy having a L10 type crystal structure with a (001) orientation. The substrate, the first underlayer, the second underlayer, and the magnetic layer are stacked in this order. The first underlayer is a crystalline layer that includes Mo as a main component. The second underlayer is a crystalline layer that includes a material containing Mo as a main component and that includes an oxide. The content of the oxide in the second underlayer is in a range of from 2 mol % to 30 mol %. The oxide is an oxide of one or more kinds of elements selected from a group consisting of Cr, Mo, Nb, Ta, V, and W.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: October 13, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Takayuki Fukushima, Haruhisa Ohashi, Lei Zhang, Yuji Murakami, Hisato Shibata, Takehiro Yamaguchi, Tetsuya Kanbe
  • Patent number: 10803898
    Abstract: A fluorine-containing ether compound of the present invention is represented by Formula (1). R1—CH2—R2—CH2—R3??(1) (In Formula (1), R1 is an organic end group having 3 or more carbon atoms which includes two or more 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 the carbon atoms which are not bonded to the polar groups, R2 includes a perfluoropolyether chain represented by Formula (3), and R3 is a hydroxyl group or R1) —(CF2)y?1—O—((CF2)yO)z—(CF2)y?1—??(3) (In Formula (3), y represents an integer of 2 to 4, and z represents an integer of 1 to 30).
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: October 13, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Naoya Fukumoto, Daisuke Yagyu, Yuta Yamaguchi, Shoko Uetake, Tsuyoshi Kato, Hiroyuki Tomita, Ryuta Miyasaka, Katsumi Murofushi
  • Patent number: 10804005
    Abstract: The present invention is directed to a new cable having at least one insulation layer, to a process for producing such cable as well as to the use of a soluble a-nucleating agent (NA) for increasing the crystallization temperature of a polymer composition (PC) being part of an insulation layer of such a cable and the use of such a cable as communication cable and/or electrical cable.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 13, 2020
    Assignee: BOREALIS AG
    Inventors: Katja Klimke, Dietrich Gloger, Markus Gahleitner, Davide Tranchida, James Ellis Robinson, Ann Watson
  • Patent number: 10796719
    Abstract: A heat-assisted magnetic recording (HAMR) medium has a non-magnetic multilayered overcoat on the recording layer. The overcoat includes a heat-dissipation layer, a diamond-like carbon (DLC) layer on and in contact with the heat-dissipation layer, and an optional interface layer between and in contact with the recording layer and the heat-dissipation layer. The heat-dissipation layer is a material with relatively high in-plane thermal conductivity, substantially higher than the in-plane thermal conductivity of both the DLC layer and the recording layer. The heat-dissipation layer laterally spreads the heat generated in the DLC layer by absorption of light from the near-field transducer to thereby reduce the temperature of the DLC layer. The optional interface layer is a material with relatively low thermal conductivity and increases the thermal resistance between the recording layer and the heat-dissipation layer.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: October 6, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Pierre-Olivier Jubert, Paul Christopher Dorsey
  • Patent number: 10789979
    Abstract: A magnetic recording medium includes: an elongated substrate having flexibility; a first layer, being provided on the substrate, containing Cr, Ni, and Fe, and having a face-centered cubic lattice structure with a (111) plane preferentially oriented so as to be parallel to a surface of the substrate; a second layer, being provided on the first layer, containing Co and O, having a ratio of an average atomic concentration of O to an average atomic concentration of Co of 1 or more, and having a column structure with an average particle diameter of 3 nm or more and 13 nm or less; a third layer, being provided on the second layer, and containing Ru; and a perpendicular recording layer, being provided on the third layer.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: September 29, 2020
    Assignee: Sony Corporation
    Inventors: Junichi Tachibana, Tetsuo Endo, Tomoe Ozaki, Takashi Aizawa
  • Patent number: 10783916
    Abstract: A nitrogenated diamond-like carbon (DLC) layer, like a nitrogenated DLC overcoat on a magnetic recording disk, includes cyanoacrylates that are attached to nitrogenated sites on the surface of the carbon layer. Cyanoacrylates are reactive with surface amine groups, which are among the nitrogenated surface sites that act as adsorption sites for volatile contaminants in the disk drive. The covalent bonding of the cyanoacrylate with the amine groups and other reactive sites on the disk overcoat blocks the adsorption of contaminants when they impinge on the overcoat surface. The cyanoacrylate may be applied to the overcoat by dipping the disk into a solution containing the cyanoacrylate or by exposing the overcoat to a cyanoacrylate vapor.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: September 22, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Daniel Bilich, Thomas E. Karis, Andrey Ovcharenko, Raj Thangaraj
  • Patent number: 10783915
    Abstract: A method and system provide a magnetic recording media usable in a magnetic storage device. The magnetic recording media includes a substrate, at least one intermediate layer and a magnetic recording stack for storing magnetic data. The intermediate layer(s) include a majority phase having a first diffusion constant and a secondary phase having a second diffusion constant greater than the first diffusion constant. The magnetic recording stack residing on the intermediate layer such that the at least one intermediate layer is between the substrate and the magnetic recording stack.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: September 22, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Kumar Srinivasan, Tuqiang Li, Mrugesh Desai
  • Patent number: 10755841
    Abstract: A method for producing a magnetic powder includes performing a reduction treatment on the surface of particles including a hard magnetic material to form core-shell particles each having a shell portion including a soft magnetic material.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: August 25, 2020
    Assignee: SONY CORPORATION
    Inventors: Masaru Terakawa, Minoru Yamaga
  • Patent number: 10738395
    Abstract: A multipolymer fiber comprising a polyester phase formed from at least one polyester resin, present at between about 50 to about 95 percent by weight and a polyamide phase formed from at least one polyamide resin, present at between about 5 to about 50 percent by weight, wherein the polyamide phase is distinct from the polyester phase and comprises a plurality of polyamide fibrils dispersed in the polyester phase, and wherein the polyamide fibrils are separately distinguishable from each other.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 11, 2020
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Subhash Chand, Ali Sayed Fareed