Patents Examined by Kevin Bernatz
  • Patent number: 6793993
    Abstract: A fire resistant resilient insulation assembly, includes: a resilient insulation and a fire resistant polymeric film forming a tubular envelope surrounding the resilient insulation. The fire resistant polymeric film includes: 50 to 80 weight percent high density polymeric material; 5 to 45 weight percent linear low density polymeric material; 5 to 25 weight percent fire retardant concentrate (a halogen and a synergist in a polymeric carrier); 0 to 5 weight percent UV stabilizer; and 0 to 10 weight percent pigment. Preferably, the film is a two layer coextruded film with the outer layer being a predominately linear low density polymer that provides a good finish for printing and a relatively high coefficient of friction to improve the handling of the film during the encapsulation of the blanket. The inner layer is predominately high density polymer that provides the coextruded film with the impact strength and tear resistance required for processing and handling.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: September 21, 2004
    Assignee: Johns Manville International, Inc.
    Inventors: Richard J. Ray, Blake Boyd Bogrett, Majid Hindi, Loye Dwayne Fant
  • Patent number: 6773782
    Abstract: The surface of a disk medium includes a substrate whose surface includes grooves and lands. A non-magnetic underlayer and a magnetic recording layer are formed on the substrate. Smoothing non-magnetic film fills the grooves, which are covered with the non-magnetic underlayer and the magnetic recording layer, so that the height of the magnetic recording layer above the grooves may reach the same level as the height of the magnetic recording layer above the lands.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: August 10, 2004
    Assignee: Fujitsu Limited
    Inventors: Hiroto Takeshita, Wataru Yamagishi
  • Patent number: 6765755
    Abstract: A magnetooptic read head including a magnetooptic transducer with a multilayer structure with at least one thin magnetic layer with a magnetooptic effect, at least one layer made of nonmagnetic material and having a predetermined wear coefficient, and a layer with good magnetic permeability for closing a magnetic circuit. The layer with good magnetic permeability includes alternating first sublayers made of a magnetic material with good magnetic permeability and second sublayers made of a material having a wear coefficient substantially equivalent to the wear coefficient of the layer made of a nonmagnetic material.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: July 20, 2004
    Assignee: Thales
    Inventor: Jean-Claude Jacquet
  • Patent number: 6638596
    Abstract: A soft magnetic film of the invention is to improve a resistivity &rgr; while maintaining a coercive force Hc and a saturation magnetic flux density Ms in good states by adding an element X (X is one or more kinds of elements selected from O, C, N, and S). Further, a thin film magnetic head capable of coping with an increase in a recording density and an increase in a recording frequency can be provided by using the soft magnetic film in core layers.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: October 28, 2003
    Assignee: Alps Electric Co., Ltd.
    Inventors: Mitsuhiro Gotoh, Hisayuki Yazawa, Yoshihiro Kanada, Mitsuo Kawasaki
  • Patent number: 6630248
    Abstract: A spin valve structure is described that has greater pinned layer robustness than is found in spin valves of the existing known art, making it well suited for use in high density recording. This has been achieved by a using a modified pinned layer that is a laminate of five layers—a first layer of cobalt-iron, a layer of ruthenium, a second layer of cobalt-iron, a layer of nickel-chromium, and a third layer of cobalt-iron. The second layer of cobalt-iron should be about twice the thickness of the third cobalt-iron layer. The sum of the second and third cobalt-iron layer thicknesses may be greater or smaller than the thickness of the first cobalt-iron layer. A process for manufacturing the structure is also described.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: October 7, 2003
    Assignee: Headway Technologies, Inc.
    Inventors: Cheng T. Horng, Min Li, Ru-Ying Tong, Simon H. Liao, Kochan Ju
  • Patent number: 6495275
    Abstract: A magnetoresistance effect element includes a free layer, a pinned layer and a non-magnetic intermediate layer interposed between the free layer and the pinned layer. Additionally, a metal barrier layer is provided adjacent to the first magnetic layer. An electron reflecting layer located adjacent to the metal barrier layer contains at least one selected from oxides, nitrides, carbides, fluorides, chlorides, sulfides and borides.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: December 17, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuzo Kamiguchi, Akiko Saito, Katsuhiko Koui, Masatoshi Yoshikawa, Hiromi Yuasa, Hideaki Fukuzawa, Susumu Hashimoto, Hitoshi Iwasaki, Hiroaki Yoda, Masashi Sahashi
  • Patent number: 6447618
    Abstract: Magnetic acicular alloy particles containing iron as a main component according to the present invention, have an average major axial diameter of 0.05 to 0.2 &mgr;m, and pH values of water suspensions of said magnetic acicular alloy particles containing iron as a main component, which satisfies the formula: (pH value of water suspension treated by A method)−(pH value of water suspension treated by B method)<0 Such magnetic acicular alloy particles containing iron as a main component exhibit an excellent dispersibility in a vehicle, especially such a vehicle composed of a binder resin having a polar group such as —SO3M (wherein M is H, Na or K), —COOH or the like, and in which an orientation and a packing density in coating film are improved.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: September 10, 2002
    Assignee: Toda Kogyo Corporation
    Inventors: Kohji Mori, Yasutaka Ota