Patents Examined by Holly Rickman
-
Patent number: 11631427Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.Type: GrantFiled: October 13, 2021Date of Patent: April 18, 2023Assignee: FUJIFILM CorporationInventor: Norihito Kasada
-
Patent number: 11631430Abstract: A magnetic recording medium is provided and includes a magnetic layer, a non-magnetic layer, a base layer and a back layer, wherein an average thickness tT of the magnetic recording medium is tT?5.3 a dimensional change amount ?w in a width direction with respect to a change in tension in a longitudinal direction is 700 ppm/N??w, a thickness of the non-magnetic layer is 2.0 ?m or less, a squareness ratio measured in a vertical direction of the magnetic recording medium is 65% or more, and the magnetic layer includes a magnetic powder.Type: GrantFiled: April 6, 2021Date of Patent: April 18, 2023Assignee: Sony Group CorporationInventors: Minoru Yamaga, Noboru Sekiguchi, Tooru Sato, Takashi Aizawa
-
Patent number: 11621020Abstract: A magnetic recording medium includes a flexible and elongated substrate, a soft magnetic layer having an average thickness of 10 nm or more to 50 nm or less, and a recording layer. The soft magnetic layer is disposed between the substrate and the recording layer, and a difference in Young's modulus between the magnetic recording medium and the substrate in a longitudinal direction of the substrate is 2.4 GPa or more.Type: GrantFiled: April 6, 2018Date of Patent: April 4, 2023Assignee: SONY CORPORATIONInventors: Junichi Tachibana, Takashi Aizawa, Teruo Sai, Noboru Sekiguchi, Tetsuo Endo, Tomoe Ozaki, Ryoichi Hiratsuka
-
Patent number: 11615812Abstract: An object is to provide a magnetic recording medium having excellent traveling stability and a thin total thickness. The present technology provides a tape-shaped magnetic recording medium including: a magnetic layer; an underlayer; a base layer; and a back layer, in which a surface on a side of the magnetic layer has a kurtosis of 3.0 or more, a surface on a side of the back layer has a kurtosis of 2.0 or more, the surface on the magnetic layer side has arithmetic average roughness Ra of 2.5 nm or less, the base layer includes a polyester as a main component, the magnetic recording medium has an average thickness tT of 5.6 ?m or less, the magnetic recording medium includes a lubricant, the lubricant includes a fatty acid and a fatty acid ester, and a mass ratio between the fatty acid and the fatty acid ester extracted with hexane satisfies fatty acid/fatty acid ester?0.Type: GrantFiled: October 3, 2019Date of Patent: March 28, 2023Assignee: Sony Group CorporationInventors: Minoru Yamaga, Takanobu Iwama, Jun Takahashi
-
Patent number: 11608590Abstract: Compositions especially suitable for forming fibers and films having good elasticity and relatively high modulus are disclosed. Surprisingly, compositions including a styrenic block copolymer having a relatively high melt flow rate, and a detackifier, and optionally, but preferably in some embodiments a polyolefin (co)polymer, and/or polystyrene polymer, and/or a softener have good draw down performance and are processable into fibers having low tack, relatively high modulus and tensile strength. The fibers produced from the composition can be processed easily and are useful to manufacture articles such as fabrics, both woven and non-woven, webs, threads, and yarns. In various embodiments, unique fiber structures are produced having low tack and desirable elasticity.Type: GrantFiled: February 17, 2017Date of Patent: March 21, 2023Assignee: TEKNOR APEX COMPANYInventors: Kushal Bahl, Darnell C. Worley, II, Chris LaTulippe
-
Patent number: 11610604Abstract: A magnetic recording medium is a magnetic recording medium in the form of a tape and includes a substrate, a foundation layer provided on the substrate, and a magnetic layer provided on the foundation layer and containing a magnetic powder. The foundation layer and the magnetic layer each contain a lubricant. A squareness ratio of the magnetic layer in a perpendicular direction is equal to or higher than 65%, an average thickness of the magnetic recording medium is equal to or smaller than 5.6 ?m, a plurality of recessed portions each having a depth corresponding to 20% or higher of the average thickness of the magnetic layer is provided on a surface of the magnetic layer, and the number of the recessed portions per unit area of 1,600 ?m2 of the surface of the magnetic layer is equal to or greater than 20 and equal to or smaller than 200, and an amount of exudation of the lubricant per unit region of 12.5 ?m×9.3 ?m on the surface of the magnetic layer in a vacuum is equal to or greater than 3.Type: GrantFiled: October 2, 2019Date of Patent: March 21, 2023Assignee: Sony Group CorporationInventors: Minoru Yamaga, Futoshi Sasaki
-
Patent number: 11600294Abstract: Magnetic media including a magnetic recording layer structure formed of alternating magnetic recording sublayers and non-magnetic exchange control sublayers. The magnetic recording layer structure may include at least one magnetic recording sublayer formed to include a pair of thin films, with the films having different concentrations of platinum, ruthenium, and/or oxide segregants. That is, the sublayer has a “dual layer” structure. The dual layer structure can provide a gradient in magnetic anisotropy, saturation magnetization, and/or intergranular magnetic exchange coupling across the sublayer. In some examples, the film nearer to the substrate of the magnetic media has a higher platinum concentration than the other film. In one aspect, the magnetic media includes the substrate and the magnetic recording layer structure on the substrate, with the structure including six magnetic recording sublayers. In another aspect, a method of fabricating magnetic media with such structures is provided.Type: GrantFiled: January 29, 2021Date of Patent: March 7, 2023Assignee: Western Digital Technologies, Inc.Inventor: Kai Tang
-
Patent number: 11574651Abstract: A magnetic recording medium, which is used in a recording and playback device in which the shortest recording wavelength is 75 nm or less, in which the magnetic recording medium has a recording layer including powder of ?-iron oxide-containing particles, the average particle size of the particles is 22 nm or less, the coercive force He is 220 kA/m or more and 320 kA/m or less, and the non linear transition shift is 20% or less.Type: GrantFiled: December 28, 2017Date of Patent: February 7, 2023Assignee: Sony CorporationInventors: Masaru Terakawa, Yoichi Kanemaki, Minoru Yamaga
-
Patent number: 11555005Abstract: A fluorine-containing ether compound according to the present invention is a fluorine-containing ether compound represented by the following General Formula (1).Type: GrantFiled: February 8, 2018Date of Patent: January 17, 2023Assignee: SHOWA DENKO K.K.Inventors: Naoya Fukumoto, Ryuuta Miyasaka, Hiroyuki Tomita, Michio Seri, Naoko Ito, Katsumi Murofushi
-
Patent number: 11545287Abstract: A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 ?m and 200 ?m or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.Type: GrantFiled: September 1, 2017Date of Patent: January 3, 2023Assignee: TDK CORPORATIONInventors: Ryoma Nakazawa, Yousuke Futamata, Takeshi Takahashi
-
Patent number: 11545177Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which an isoelectric point of a surface zeta potential of the magnetic layer is equal to or smaller than 3.8.Type: GrantFiled: September 16, 2021Date of Patent: January 3, 2023Assignee: FUJIFILM CorporationInventors: Norihito Kasada, Akinori Sugishima
-
Patent number: 11538494Abstract: In the magnetic recording and reproducing device, a distal end width of the first magnetic pole in the recording element is substantially the same as a distal end width of the second magnetic pole; the reproducing element width of the reproducing element is equal to or less than 0.8 ?m; and in the magnetic recording medium, a number distribution A of equivalent circle diameters of a plurality of bright areas in a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, and a number distribution B of equivalent circle diameters of a plurality of dark areas in a binarized image of a secondary electron image obtained by imaging the surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 2 kV satisfy predetermined number distribution, respectively.Type: GrantFiled: January 22, 2021Date of Patent: December 27, 2022Assignee: FUJIFILM CorporationInventors: Atsushi Musha, So Matsuyama, Norihito Kasada
-
Patent number: 11525032Abstract: According to one aspect of the present invention, an organic fluorine compound is represented by a general formula (R-?-E-CH2-A-CH2-E?)n-??-G??(1B) (where n is an integer of 2 to 5, A is a divalent perfluoropolyether group, ? is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E and E? are each independently an ether bond or an ester bond or a group that is represented by a chemical formula —O—CH2CH(OH)CH2O— ?? is a group in which n+1 hydrogen atoms are separated from benzene, G is an organic group containing a fullerene skeleton, the n number of groups each of which is represented by a general formula R-?-E-CH2-A-CH2-E?- may be the same or different, and at least one ? among the n number of ? is an arylene group).Type: GrantFiled: June 27, 2018Date of Patent: December 13, 2022Assignee: SHOWA DENKO K.K.Inventors: Kentaro Watanabe, Yasuyuki Ueda, Kenzo Hanawa
-
Patent number: 11527337Abstract: The invention relates to a crosslinkable polymer composition comprising (a) a polyolefin bearing hydrolysable silane groups and a silanol condensation catalyst compound, as well as to an article, preferably a cable, thereof. Also the use of the silanol condensation catalyst compound for crosslinking an article, preferably a layer of a cable is provided.Type: GrantFiled: August 24, 2012Date of Patent: December 13, 2022Assignee: BOREALIS AGInventor: Kristian Dahlen
-
Patent number: 11521648Abstract: A heat-assisted magnetic recording (HAMR) medium has a multilayered underlayer between the heat-sink layer and the recording layer. One embodiment of the underlayer is a multilayer of a thermal barrier layer consisting essentially of MgO and TiO, and a seed layer containing MgO and nitrogen (N) directly on the thermal barrier layer, with the recording layer on and in contact with the seed layer. The interface between the thermal barrier layer and the seed layer contains Ti and N, some of which may be present as TiN to act as a diffusion barrier to prevent diffusion of the Ti into the recording layer. The Ti-containing thermal barrier layer has a higher thermal resistivity than the conventional MgO thermal barrier/seed layer and thus allows for reduced laser power to the recording layer while still achieving a high thermal gradient at the recording layer.Type: GrantFiled: February 9, 2021Date of Patent: December 6, 2022Assignee: Western Digital Technologies, Inc.Inventors: Hoan Cong Ho, Paul Christopher Dorsey, Tomoko Seki
-
Patent number: 11521650Abstract: 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: May 24, 2021Date of Patent: December 6, 2022Assignee: Sony CorporationInventors: Minoru Yamaga, Noboru Sekiguchi
-
Patent number: 11514944Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer has a timing-based servo pattern, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.Type: GrantFiled: March 22, 2019Date of Patent: November 29, 2022Assignee: FUJIFILM CorporationInventor: Norihito Kasada
-
Patent number: 11514940Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which a difference (S0.5?S13.5) between a spacing S0.5 measured by optical interferometry regarding a surface of the magnetic layer under a pressing force of 0.5 atm after n-hexane cleaning and a spacing S13.5 measured by optical interferometry regarding the surface of the magnetic layer under a pressing force of 13.5 atm after n-hexane cleaning is equal to or smaller than 3.0 nm, and a magnetic recording and reproducing device including this magnetic recording medium.Type: GrantFiled: September 12, 2019Date of Patent: November 29, 2022Assignee: FUJIFILM CorporationInventors: Naoki Sano, Takuto Kurokawa, Norihito Kasada, Eiki Ozawa
-
Patent number: 11514943Abstract: The magnetic tape includes a non-magnetic support; a non-magnetic layer including a non-magnetic powder and a binding agent on the non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic layer, in which a total thickness of the non-magnetic layer and the magnetic layer is equal to or smaller than 0.60 ?m, the magnetic layer has a servo pattern, and an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.Type: GrantFiled: March 22, 2019Date of Patent: November 29, 2022Assignee: FUJIFILM CorporationInventor: Norihito Kasada
-
Patent number: 11508406Abstract: Provided are a magnetic recording medium including: a non-magnetic support; and a magnetic layer which is provided on at least one surface of the non-magnetic support and includes particles of epsilon type iron oxide-based compound, and a binding agent, in which a contact angle measured regarding a surface of the magnetic layer is equal to or greater than 30.0° and smaller than 45.0° with respect to 1-bromonaphthalene and 80.0° to 95.0° with respect to water, a manufacturing method of particles of an epsilon iron oxide-based compound, and a manufacturing method of a magnetic recording medium.Type: GrantFiled: January 28, 2019Date of Patent: November 22, 2022Assignee: FUJIFILM CORPORATIONInventor: Takashi Fujimoto