Patents Examined by Paul Thibodeau
  • Patent number: 6893511
    Abstract: The invention relates to a semi-hard magnetic material having rectangular hysteresis loop and superior magnetization steepness and a method of producing a bias material preferably used for a magnetic marker. This method comprises the steps of preparing a multilayer clad material in which layers “A” each containing Fe as the main component thereof and layers “B” containing as the main component thereof a Cu group metal are diffusion-bonded, heating the multilayer clad material, subjecting the material to a dividing treatment, and applying cold working thereto. By this method, it becomes possible to obtain the semi-hard magnetic material having high squareness ratio and superior magnetization steepness, and to obtain the bias material for the magnetic marker.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: May 17, 2005
    Assignee: Hitachi Metals, Ltd.
    Inventors: Noriyuki Nakaoka, Akira Kawakami, Hideya Yamada
  • Patent number: 6890638
    Abstract: Ballistically resistant and fire resistant composite articles for aircraft interiors and other applications. Composite articles are provided having a flexural modulus of at least about 80,000 lbs/sq. in (552 MPa), a flexural strength at yield of at least about 800 lbs/sq. in. (5.52 MPa), an areal density of about 0.9 lb/ft2 (4.40 kg/m2) to about 1.5 lb/ft2 (5.86 kg/m2), a fire resistance meeting the requirements of §25.853 Title 14 of the United States Code, Jan. 1, 2002, and a V0 velocity of at least about 1430 ft/sec (427 m/s) when tested by United States Federal Aviation Administration Advisory Circular 25.795.2, 10 Jan. 2002, using .44 Magnum Jacketed Hollow Point (JHP) bullets of 240 grains (15.6 g) mass and using 9 mm Full Metal Jacketed, Round Nose (FMJ RN) bullets of 124 grains (8.0 g) mass.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: May 10, 2005
    Assignees: Honeywell International Inc., Composix Company
    Inventors: Huy X. Nguyen, Larry Dickson
  • Patent number: 6863979
    Abstract: A consolidated material of coated powders obtained by a method which comprises forming a molding by mutually bonding powder particles having a given property and in which the powder particles can be made to have a desired arrangement or can be arranged in positions giving such a predetermined distance that desired properties are obtainable. The present invention shows a process for producing a consolidated material of coated powders which are mutually consolidated, comprising adhering either powders each comprising a base particle having thereon a coating film having a uniform thickness of 0.01 to 20 ?m or powders each comprising base particles each having thereon plural coating films having a uniform thickness of 0.01 to 5 ?m per film in which at least any adjacent coating films are different in kind, at the coating film or by an adhesive.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: March 8, 2005
    Assignees: Nittetsu Mining Co., Ltd.
    Inventors: Takafumi Atarashi, Katsuto Nakatsuka
  • Patent number: 6853521
    Abstract: A seed layer is formed with a Cr layer in which the direction of a crystal face in at least one crystal grain is oriented in a different direction from the direction of an equivalent crystal face in another crystal grain. Consequently, wettability of the seed layer can be markedly improved and the unidirectional exchange bias magnetic field in a pinned magnetic layer can be increased while permitting the surface of each layer on the seed layer to have good lubricity.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: February 8, 2005
    Assignee: Alps Electric Co., Ltd.
    Inventors: Naoya Hasegawa, Masamichi Saito, Kenichi Tanaka
  • Patent number: 6841224
    Abstract: A method of patterning magnetic material includes forming a ferromagnetic material layer containing one element selected from the group consisting of Fe, Co and Ni on a substrate, selectively masking a surface of the ferromagnetic material layer, and making nonferromagnetic. The making nonferromagnetic step includes exposing an exposed portion in halogen-containing reaction gas, changing magnetism of the exposed portion and a lower layer thereof by chemical reaction, and making the exposed portion a nonferromagnetic material region. A magnetic recording medium is fabricated by using the magnetic material patterning method and includes a plurality of recording regions made of ferromagnetic materials, each containing at least one element selected from the group consisting of Fe, Co and Ni, and a nonferromagnetic material region for separating the recording regions from each other. The nonferromagnetic material region is a compound region of the ferromagnetic material and halogen.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: January 11, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiyuki Kamata, Katsuyuki Naito, Hiroyuki Hieda
  • Patent number: 6830821
    Abstract: A method for coating zinc, zinc plated, or steel articles with a hydroxy benzoic acid protective coating by coating a cleaned zinc, zinc plated, or steel with a hydoxy benzoic acid composition having a pH of about 2.0 to 5.0; and coating cleaned tin surfaced articles with a composition having a PH of 2.0 to 12.0, and the composition having as its essential ingredients proteins, amino acids, amino acid—protein compounds and amine alcohols; and the articles produced thereby along with the coated articles having an appropriate paint thereon.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: December 14, 2004
    Assignee: Sanchem, Inc.
    Inventor: John W. Bibber
  • Patent number: 6830824
    Abstract: A magnetic recording medium has a substrate, a base layer formed on the substrate and including a magnetic material, a switching layer formed on the base layer and including a nonmagnetic material, and a recording layer formed on the switching layer and having a structure comprising magnetic particles and a nonmagnetic wall buried between the magnetic particles. The medium meets the condition of TcB>Tsw, where TcB is a Curie temperature of the base layer, and Tsw is a temperature at which the recording layer and the base layer begin to exert exchange coupling interaction.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: December 14, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Kikitsu, Junichi Akiyama, Katsutaro Ichihara, Tadashi Kai, Toshihiko Nagase, Tomoyuki Maeda
  • Patent number: 6829121
    Abstract: A magnetoresistive film includes a nonmagnetic film, and a structure in which magnetic films are formed on the two sides of the nonmagnetic film. At least one of the magnetic films is a perpendicular magnetization film. A magnetic film whose easy axis of magnetization is inclined from a direction perpendicular to the film surface is formed at a position where the magnetic film contacts the perpendicular magnetization film but does not contact the nonmagnetic film. A memory, magnetic element, magnetoresistive element, and magnetic element manufacturing method are also disclosed.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: December 7, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Ikeda, Akio Koganei, Kazuhisa Okano
  • Patent number: 6821642
    Abstract: A magneto-optical recording medium includes at least three magnetic layers of a first magnetic layer, a second magnetic layer and a third magnetic layer, in which a recording mark recorded in the third magnetic layer by irradiation of a light beam is transferred through the second magnetic layer formed above the third magnetic layer to the first magnetic layer formed above the second magnetic layer for reproduction, wherein the first magnetic layer is provided with a high temperature mask having no spontaneous magnetization in a region where its temperature becomes a predetermined temperature or higher.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: November 23, 2004
    Assignee: Fujitsu Limited
    Inventor: Ken Tamanoi
  • Patent number: 6818284
    Abstract: In a single-sided paper phenolic resin copper-clad laminate composed of a phenolic resin impregnated paper base having copper foils laminated on and resists applied on the face side thereof, resists formed of the same material as the resists on the face side are applied also on the reverse side of the phenolic resin impregnated paper base, so that the face side and the reverse side match approximately with each other in thermal expansibility. The single-sided paper phenolic resin copper-clad laminate warps only slightly even when the peak temperature is raised to a degree suitable for lead-free solder in the reflow process for mounting electronic components.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: November 16, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Takaaki Ono, Sadayuki Toda
  • Patent number: 6808793
    Abstract: A moisture-tolerant structural panel comprising a gypsum board comprising a set gypsum core sandwiched between and faced with mats of glass fibers, wherein a free surface of one of said mats is coated with a combination of a mineral pigment, an inorganic adhesive binder and a polymer latex adhesive binder applied to said surface as an aqueous coating composition, said aqueous coating composition upon drying and setting, covering said mat to the extent that substantially none of the fibers of said mat protrude from said coating.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: October 26, 2004
    Assignee: G-P Gypsum Corporation
    Inventors: Brian G. Randall, Gary A. Ricards
  • Patent number: 6805952
    Abstract: Components for use in plasma processing chambers having plasma exposed surfaces with surface roughness characteristics that promote polymer adhesion. The roughened surfaces are formed by plasma spraying a coating material such as a ceramic or high temperature polymer onto the surface of the component. The plasma sprayed components of the present invention can be used for plasma reactor components having surfaces exposed to the plasma during processing. Suitable components include chamber walls, chamber liners, baffle rings, gas distribution plates, plasma confinement rings, and liner supports. By improving polymer adhesion, the plasma sprayed component surfaces can reduce the levels of particle contamination in the process chamber thereby improving yields and reducing down-time required for cleaning and/or replacing chamber components.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: October 19, 2004
    Assignee: Lam Research Corporation
    Inventors: Christopher C. Chang, Robert J. Steger
  • Patent number: 6797415
    Abstract: A track width defining layer for defining a write track width of a thin-film magnetic head is made of a CoNiFe film formed through electroplating. The CoNiFe film contains 60 to 75 weight % cobalt, 10 to 20 weight % nickel, and 10 to 20 weight % iron, and has a crystal structure that is a mixture of a body-centered cubic structure phase and a face-centered cubic structure phase, in which Ib/If falls within the range of 0.3 to 0.7 inclusive where Ib represents the intensity of an X-ray diffracted from a (110)-plane of the body-centered cubic structure and If represents the intensity of an X-ray diffracted from a (111)-plane of the face-centered cubic structure. The pH of a plating bath for forming the CoNiFe film through electroplating is adjusted to 3.0 to 4.0 inclusive.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 28, 2004
    Assignee: TDK Corporation
    Inventors: Atsushi Yamaguchi, Seiji Yari, Tetsuya Mino, Shuichi Okawa, Shigeru Ichihara
  • Patent number: 6797373
    Abstract: Provided is a magnetic recording medium ensuring an adequate S/N even in high density magnetic recording, and tending not to electrostatically damage MR heads during recording and reproduction employing MR heads. A magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder and a binder in this order on at least one side of a nonmagnetic support, wherein said nonmagnetic layer comprises 10 to 50 mass parts of carbon black with a mean particle diameter of 10 to 30 nm per 100 mass parts of said nonmagnetic powder, said magnetic layer has a thickness equal to or less than 0.2 &mgr;m, the standard deviation b of the average intensity a of elements due to said ferromagnetic powder as determined by electron-beam microanalysis is 0.03≦b/a≦0.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: September 28, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hitoshi Noguchi, Nobuo Yamazaki, Shinji Saito
  • Patent number: 6797372
    Abstract: The present invention relates to a resin-coated steel sheet for fuel tanks of an automobile and a resin solution used for the same. The resin solution of the present invention comprises (a) a main solution of water soluble phenoxy resin having a number average molecular weight of 25,000 to 50,000; (b) 2 to 15 phr of melamine resin on the basis of the main solution; (c) 10 to 20 phr of colloidal silica on the basis of the main solution, (d) 2 to 10 phr of teflon resin on the basis of the main solution, and (e) 5 to 70 phr of metallic powder being selected at least one material from the group consisting of Al, Zn, Mn, Co, Ni, Sn and SnO. The resin solution is coated on a cold rolled steel sheet plated with zinc or zinc alloy over which a chromate layer films, and then baked at a local temperature of 160 to 250° C. to prepare a resin-coated steel sheet for fuel tanks of an automobile.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: September 28, 2004
    Assignee: Pohang Iron & Steel Co., Ltd.
    Inventors: Jae-Ryung Lee, Sam-Kyu Chang, Sang-Geol Noh, Soo-Hyoun Cho
  • 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: 6794022
    Abstract: A metal plate coated with a lubricating resin is coated with a lubricating resin having a modified polyamide ({circle around (1)}) and a crosslinking curing agent ({circle around (2)}) of the modified polyamide ({circle around (1)}) on at least one side face of the metal plate. At this time, the compounding ratio of the modified polyamide ({circle around (1)}) and the above-described crosslinking curing agent ({circle around (2)}) is preferably (60:40) to (15:85) by mass ratio converted to solid content. Furthermore, according to requirement, an inorganic powder filler ({circle around (3)}) may be added to the resin composition.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: September 21, 2004
    Assignees: Kabushiki Kaisha Kobe Seiko Sho, Sun Aluminum Industries Co., Ltd.
    Inventors: Naoya Fujiwara, Eiichiro Yoshikawa, Hiroshi Kawai, Mikio Ono, Yasuhiro Okamura
  • Patent number: 6794063
    Abstract: The present invention provides a thin film magnetic head having sufficient recording performance on a recording medium imparted with a large coercive force. According to the present invention, a plated magnetic thin film can be obtained in which a crystal grain size is modulated in a film thickness direction and a coercive force is reduced. Further, according to the present invention, even for a composition area indicating a high saturation magnetic flux density in which, conventionally, soft magnetic properties could not be obtained, magnetic film having an excellent soft magnetic property can be manufactured.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: September 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yasuyuki Okada, Kazue Kudo, Hiroyuki Hoshiya
  • Patent number: 6794057
    Abstract: A configuration for laminated antiferromagnetically coupled magnetic recording layers for a magnetic recording medium is described. For this purpose, a stabilization layer (top layer) is put on top of the main magnetic recording layer (middle layer) and another stabilization layer (bottom layer) is put under the main magnetic recording layer. The top layer, middle layer and bottom layer are antiferromagnetically coupled. This configuration can double the antiferromagnetic coupling on the recording layer and thus increase the thermal stability. This configuration can also further reduce the remnant magnetization thickness product (Mr&dgr;), which is critical for low noise media. A traditional or new intermediate layer, underlayer and seedlayer can be used under magnetic layers of the present invention. Further, a tradition or new overcoat and lubricant can be used over the magnetic layers of the present invention.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 21, 2004
    Assignee: Data Storage Institute
    Inventors: Jian-Ping Wang, Seidikkurippu Nellainayagam Piramanayagam
  • Patent number: 6790534
    Abstract: A favorable magnetic transfer is performed to a perpendicular magnetic recording medium. A master medium is provided with a substrate on the surface of which protrusion portions, which form a pattern corresponding to the data that is to be transferred, having a pliable layer thereon have been formed. The master medium is further provided with a soft magnetic layer formed in the depression portions between the protrusion portions, and which is magnetically linked to the soft magnetic layer of the protrusion portions. The soft magnetic layer of the surface of the protrusion portions is conjoined with the magnetic recording layer of a perpendicular magnetic recording medium to form a conjoined body, and a transfer magnetic field is applied to the conjoined body in the direction from the substrate of the master medium toward the slave medium to perform the magnetic transfer.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: September 14, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Nishikawa, Kazunori Komatsu