Patents Examined by L. Kiliman
  • Patent number: 6913830
    Abstract: A protective and decorative coating composition including semiconductor particulate colorants which in combination with a resinous composition produce a desired color. The colorants are semiconductor particles which exhibit sized-quantized absorption of visible light and have a particle size of up to about 12 nm.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: July 5, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Eldon L. Decker, Mark D. Merritt, Calum H. Munro, Noel R. Vanier, Rachel B. Wilson
  • Patent number: 6420028
    Abstract: A polymer article having structure (I), where P comprises the basic polymer and groups —L—CH(—X(R1)p)—CH2(—Y(R2)p); L is a part of a pending group utilized for introducing —X(R1)p and —Y(R2)p; X and Y are halogen, N, S and O; R1 is hydrogen, alkyl, acyl or R2 when X is N, O or S; R2 is hydrogen, alkyl, alkylaryl or arylalkyl in which the alkyl part may contain 1-18 carbons, or —R3(—NH—CR4═O)q or —R3(—NH2)q, —CR4═O or poly alkyloxy that may have been terminally acylated or alkylated; p is an integer 0-3, with the provisos a) p depends on X being halogen, O, S or N, and b) that if several groups R2 are present they may be identical or different; R3 is alkyl, —O-alkyl, hydroxyalkyl, phenylalkyl, with up to 18 carbon atoms in the alkyl part, and R4 is C1-18 alkyl. q is an integer>O representing that one or more hydrogens in R3 may have been replaced with —NH2 or —NH—CR4═O.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: July 16, 2002
    Assignee: Amersham Pharmacia Biotech AB
    Inventors: Steinar Hagen, Rune Ringberg, Geir Fonnum
  • Patent number: 5525398
    Abstract: A perpendicular magnetic recording medium has a magnetic layer comprised of two stacked sublayers each in the form of ferromagnetic metal thin film consisting of columnar crystal grains wherein the angle .theta. between the average growth direction of the columnar crystal grains and a normal to the substrate is for the lower sublayer and for the upper sublayer, and the mean maximum diameter of columnar crystal grains of the lower sublayer is not smaller than the mean maximum diameter of columnar crystal grains of the upper sublayer. An apparatus suitable for the evaporation of the magnetic layer is arranged as shown in the Figure. Magnetic flux associated with the upper sublayer finds an escape to the lower sublayer, preventing formation of a closed loop of magnetic flux within the columnar crystal grains of the upper sublayer. The lower sublayer is magnetized, thus contributing to an improvement in reproduction output.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: June 11, 1996
    Assignee: TDK Corporation
    Inventors: Mitsuru Takai, Koji Kobayashi, Jiro Yoshinari
  • Patent number: 5510200
    Abstract: Multi-layer Langmuir-Blodgett films comprising alternate layers of an optically non-linear amphiphilic compound and a spacer compound wherein the spacer comprises at least two hydrophobic substituents, have high second order non-linear optical coefficients, are stable over a prolonged period and quadratic SHG enhancement based on the number of layers. They are useful in a variety of opto-electronic devices.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: April 23, 1996
    Assignee: British Technology Group Limited
    Inventor: Geoffrey J. Ashwell
  • Patent number: 5508117
    Abstract: Disclosed is a magnetic recording medium comprising a nonmagnetic support having thereon a magnetic layer comprising a ferromagnetic powder and a binder resin as the main components together with abrasive particles. The ferromagnetic powder is a hexagonal ferrite fine powder having particle sizes of from 0.01 to 0.2 .mu.m and a coercive force of from 600 to 2,000 Oe. The binder resin is composed of a polyurethane resin and/or a vinyl chloride resin each having at least one kind of a polar group, the abrasive particles are composed of a fine particle abrasive having a mean particle size of from 0.1 to 0.39 .mu.m and a coarse particle abrasive having a mean particle size of from 0.4 to 1.0 .mu.m, and the density of the coarse particle abrasive distributed in the vicinity of the surface of the magnetic layer is higher than that of the coarse particle abrasive distributed in the other region of the magnetic layer.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: April 16, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Kawamata, Yasushi Endo
  • Patent number: 5503922
    Abstract: In the magnetic recording medium, the spherical particles are added in the surface magnetic layer of the magnetic film having multilayer configuration (structure). And the spherical particles have a diameter in the range of from 0.5 to 1.5 times as large as the thickness of surface magnetic layer, and the amount of the spherical particles is in the range of from 0.1 parts to 1 part per 100 parts by weight of magnetic powder included in the surface magnetic layer. Fine studs are formed on the surface of the surface magnetic layer, and it results in both small surface roughness and low coefficient of friction.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: April 2, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yukihiro Shimasaki, Kazunori Sakamoto, Akira Kisoda, Yuji Midou
  • Patent number: 5501913
    Abstract: A garnet polycrystalline film for a magneto-optical recording medium including at least two layers of polycrystalline garnet represented by Bi.sub.x R.sub.3-x M.sub.Y Fe.sub.5-Y O.sub.12, where 0.ltoreq.X.ltoreq.3, 0 Y.ltoreq.5, R represents one or more rare earth elements containing yttrium, and M represents Ga, Al or In, wherein crystal lattice constants of these adjacent two layers are different from each other by .+-.0.3% or more, and an average crystal grain diameter of one of the layers is smaller than that of the other layer and 1 .mu.m or less, and a magneto-optical recording disk using this garnet polycrystalline film.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: March 26, 1996
    Assignees: Nippon Steel Corporation, Nippon Hoso Kyokai
    Inventors: Kenji Shimokawa, Norikazu Kawamura
  • Patent number: 5494742
    Abstract: A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic metal film and in which a concentration of at least one element selected from the group consisting of silicon, phosphorus, sulfur, tin and indium is or concentrations of boron and at least one element selected from the group consisting of tin and indium are decreased in a depth direction from the surface of said carbon film, and a lubricant layer formed on said carbon film, which medium has improved running durability and corrosion resistance.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: February 27, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Seki, Kenji Kuwahara, Hideyuki Ueda, Kiyosi Takahasi, Masaru Odagiri, Mikio Murai
  • Patent number: 5492773
    Abstract: A magneto-optical recording medium having an improved durability or reliability is obtained by providing a protecting layer of an alloy of titanium with one or more of chromium, rhenium and tantalum. This titanium alloy protecting layer has an improved resistance to oxygen, water, chlorine, and acids, etc. and provides an improved resistance to the environment and attacks from the synthetic resin substrate or other layers constituting the medium, such as a dielectric layer and a reflecting layer.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: February 20, 1996
    Assignee: Teijin Limited
    Inventors: Masahiko Sekiya, Kiyoshi Chiba
  • Patent number: 5489451
    Abstract: The invention relates to reversibly crosslinked, orientable liquid crystalline (LC) polymer films, comprised ofan LC poly(meth)acrylate PP and/ora mixture of PP with low molecular weight crosslinking components. The inventive films have numerous applications, e.g. for optical information storage, and for surface coatings, laminates, or bonded systems having special anisotropic properties.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: February 6, 1996
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Jurgen Omeis, Joachim Knebel, Karlheniz Goll
  • Patent number: 5486395
    Abstract: A magneto optical disk comprising: a circular substrate; a recording layer, formed on the substrate, for magneto-optical recording of information; a readout layer, formed between the substrate and the recording layer, for the reproduction of information recorded on the recording layer, wherein the readout layer has a Curie temperature which is higher than the Curie temperature of the recording layer, and exhibits in-plane magnetization at room temperature and a change from in-plane magnetization to perpendicular magnetization when its temperature rises over a certain temperature as a result of the application of a light beam, and wherein the magnetic compensation temperature is set such that it increases from the peripheral edge of the magneto-optical disk toward the center thereof.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: January 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshiteru Murakami, Naoyasu Iketani, Akira Takahashi, Kenji Ohta
  • Patent number: 5482762
    Abstract: A magnetic recording medium having two magnetic layers is disclosed. The magnetic recording medium has a surface fatty acid content of 0.38 to 2.53 .mu.g per square centimeter and a magnetic layer closest to a support contains ferromagnetic powder of Co-containing FeOx wherein x represents 1.33 to 1.43. It is improved in electromagnetic conversion characteristics, light-shielding property and erasing property, and is suitably used for audio or video recording medium.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: January 9, 1996
    Assignee: Konica Corporation
    Inventors: Setsuko Kawahara, Yasushi Nakano, Yuji Shimizu, Shoichi Sugitani
  • Patent number: 5480713
    Abstract: A magnetic recording medium having an improved output property over the wide range of wavelength, by controlling the magnetic reluctance and saturated magnetic flux density of the outermost layer and at least one layer other than the outermost layer, as specified in the claims, is disclosed. A magnetic matal powder contained in the outermost layer has an average major axis length of not more than 250 nm and a ratio of the average major axis length divided by an average X-ray measured particle size is less than 12.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: January 2, 1996
    Assignee: Konica Corporation
    Inventors: Kunitsuna Sasaki, Narito Goto, Katsuyuki Takeda, Nobuyuki Sekiguchi, Hideki Takahashi, Ryosuki Isobe, Takahiro Mori
  • Patent number: 5480694
    Abstract: A magnetic recording medium comprising alumite made by anodic oxidation of aluminum or an aluminum alloy and comprising fine pores in which a ferromagnetic material is filled, wherein an in-plane remanence is at least 2.5 times greater than a perpendicular remanence and a magnetic recording medium of the above alumite, wherein the magnetic material is at least one material selected from the group consisting of Fe or Co, alloy mainly composed of Fe or Co, an Co or Fe containing a P element, and an alloy mainly composed of Co or Fe and containing the P element.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: January 2, 1996
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Hideo Daimon, Osamu Kitakami, Hideo Fujiwara
  • Patent number: 5478661
    Abstract: A magnetic recording medium having a magnetic thin film represented by the formula Co.sub.100-a-b-x-y-z Ni.sub.a Cr.sub.b Pt.sub.x M.sub.y Oz wherein a, b, x, y and z are atomic % satisfying 0.ltoreq.a.ltoreq.15, 0.ltoreq.b.ltoreq.15, 0<x.ltoreq.20, 0<y .ltoreq.20, 0<z.ltoreq.40, y+z.ltoreq.40, and a+b+x+y+z.ltoreq.60, and M is at least one element selected from the group consisting of Si, B, Zr, Al, Y, P, Ti, Sn and In.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: December 26, 1995
    Assignee: AG Technology Co., Ltd.
    Inventors: Akihiro Murayama, Masao Miyamura
  • Patent number: 5476713
    Abstract: A magneto-optical recording medium having at least two kinds of films consisting of a rare earth metal-transition metal alloy thin film and a dielectric film formed on a substrate. The dielectric film is formed by sputtering a target in an atmosphere containing at least an oxygen gas or a compound gas containing oxygen as one constitutional element. Particularly, the use of a carbon dioxide gas CO.sub.2 or a carbon monoxide gas CO provides for an SiCON film rather than an Si.sub.3 N.sub.4 film. The SiCON film has a refractive index and an absorptivity almost identical with those of the Si.sub.3 N.sub.4 film, and has a thermal conductivity smaller than that of the Si.sub.3 N.sub.4 film. As a result, it has been found that the SiCON film is advantageous from the viewpoints of a magnetic field sensitivity and a film thickness.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: December 19, 1995
    Assignee: Sony Corporation
    Inventors: Toru Abiko, Mari Yoshida, Takashi Kishi, Hiroshi Nakayama
  • Patent number: 5472783
    Abstract: A coated article (10) and method of making the same is disclosed wherein the coated article (10) includes a substrate (12) consisting essentially of titanium or titanium alloy and an outer coating (14) of thermoplastic resin for protecting the substrate from chemical degradation and maintaining stability during exposure to temperatures of at least up to C. An adhesion primer layer (16) is disposed between the substrate (12) and the outer coating (14). The adhesion primer layer (16) includes an inorganic binder matrix for increasing adhesion to the titanium and titanium alloys. The primer layer (16) further includes a thermoplastic resin in particulate form for increasing adhesion to the outer coating (14).
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: December 5, 1995
    Assignee: Sermatech International, Inc.
    Inventors: Mark F. Mosser, Bruce G. McMordie, Kevin B. Eddinger
  • Patent number: 5472778
    Abstract: A magnetic recording medium having a magnetic layer in the form of a ferromagnetic metal thin film includes an undercoat film disposed between the magnetic layer and the substrate and a topcoat film on the magnetic layer. Each of the undercoat and topcoat films is a plasma polymerized film containing silicon, the Si content in the film being 30 to 50 at %. Corrosion resistance and durability are significantly improved.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: December 5, 1995
    Assignee: TDK Corporation
    Inventors: Kunihiro Ueda, Takayoshi Kobuke
  • Patent number: 5470636
    Abstract: A magnetic recording medium having a substrate made of aluminum or aluminum alloy and an anodic-oxide film, e.g., alumite film, formed by effecting the anodic oxidation process, wherein the surface of the alumite film has protruding portions formed in addition to micro-irregularities which are formed in response to the cell-pore structure of the alumite film and height of the protruding portions is higher than that of the micro-irregularity, and density of the protruding portions is ranging from 10.sup.2 to 10.sup.7 per one square millimeter, these protruding portions are formed by processing the alumite film in the fluorine-contained solution (e.g., hydrofluoric acid) or in solution containing one of the acid (HCl), base (NaOH) and strong-acid salt ((NH.sub.4)SO.sub.4), Cr film and magnetic film are sequentially formed on the alumite film by the sputtering process.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: November 28, 1995
    Assignee: Yamaha Corporation
    Inventors: Yukio Wakui, Yoshiki Nishitani, Kenichi Miyazawa
  • Patent number: 5470650
    Abstract: Magnetic recording media are obtained by preparing a dispersion of anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying the dispersion as a layer to a nonmagnetizable substrate, then orienting the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic layer, the magnetic layer containing finely divided organic, hydrophobic supporting pigments and a highly viscous polysiloxane.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: November 28, 1995
    Assignee: Basi Magnetics GmbH
    Inventors: August Lehner, Norbert Schneider, Hermann Roller, Werner Balz, Werner Lenz, Albert Kohl