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| Number | Title | Issue Date |
| 8444872 | Magnetic iron oxide particle, magnetic material, and radio wave absorber Disclosed is a magnetic material having high Hc and High Curie point, which is capable of controlling such magnetic characteristics without requiring rare or expensive raw materials. Specifically disclosed is a magnetic material composed of particles of a magnetic i... | 05/21/2013 |
| 8419966 | Method of manufacturing hexagonal ferrite magnetic powder, magnetic recording medium and method of manufacturing the same An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture comprising a hexagonal ferrite-forming component and a glass-forming component; rapidly coo... | 04/16/2013 |
| 8398880 | Method of modifying surface of powder, coating material, method of manufacturing magnetic recording medium, and magnetic recording medium manufactured by the same An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a compound denoted by general formula (I): wherein, in general formula (I), each of R10 a... | 03/19/2013 |
| 8226845 | Iron powder phosphonate coating A fluid includes a liquid medium having iron particles mixed therein. An organic phosphonate based coating is established on the iron particles. The organic phosphonate based coating does not substantially include phosphonic acid groups at an outer surface thereof, ... | 07/24/2012 |
| 8133405 | Spinel-type ferrimagnetic particles, process for producing the same, and magnetic recording medium using the same Spinel-type ferrimagnetic particles having a composition represented by the formula: (MO)·n/2(Fe2O3) where M is a divalent metal and n is a molar ratio of Fe to M (n=Fe/M) which is from more than 2.05 to less than 2.... | 03/13/2012 |
| 8123973 | Method of manufacturing magnetic material A method of manufacturing magnetic material is described hereinafter. Firstly, Fe(NO3)3.9H2O and other metal nitrate compounds are dissolved in an alcohol solvent to form a mixed solution. Secondly, the mixed solution is heated to 60... | 02/28/2012 |
| 8062542 | Light-polarizing solid coating composition, optical lens comprising same, and method for making same The light-polarizing solid coating composition which comprises (i) particles of at least one magnetic material suspended in a solvent, is characterized in that it comprises (ii) at least one dichroic dye compound. Application to ophthalmic optics. ... | 11/22/2011 |
| 7442362 | Method for preparing iron oxides Highly pure iron oxides are prepared by reaction of metallic iron, in the form of microspheroidal particles or of scraps or cuttings, with an agitated aqueous solution of a mono- or polycarboxylic acid with a pKa of 0.5 to 6 relative to the first carboxyl and capabl... | 10/28/2008 |
| 7425376 | Ferrite substrate for thin-film inductors, thin-film common mode filter using the substrate, and thin-film common mode filter array using the substrate A ferrite substrate for thin-film inductors is provided by means of blending raw materials to meet a composition of di-iron trioxide (Fe2O3): 40 to 55 mol %, nickel oxide (NiO): 5 to 35 mol %, zinc oxide (ZnO): 10 to 40 mol %, and bismuth triox... | 09/16/2008 |
| 7410625 | Process of making metal containing iron oxide and iron sulfide based nanoparticle materials A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200-360° C. is described. The size of the particles can be controlled either by changing ... | 08/12/2008 |
| 7387847 | Ferrite substrate, thin-film common mode filter using the substrate, thin-film common mode filter array using the substrate and manufacturing method of the substrate A ferrite substrate for thin-film inductors is provided by means of blending raw materials to meet a composition of di-iron trioxide (Fe2O3): 40 to 55 mol %, nickel oxide (NiO): 5 to 35 mol %, zinc oxide (ZnO): 10 to 40 mol %, and bismuth triox... | 06/17/2008 |
| 7378035 | Ionic material The present invention relates to a material containing ionic groups that form an ionic pair with a free radical catalyst. In particular, the invention relates to materials that are magnetic, and to the methods of forming such materials. For example, a method of form... | 05/27/2008 |
| 7354528 | Magnetorheological fluid compositions A magnetorheological fluid composition comprising a low aspect ratio magnetizable particle comprising a unimodal particle distribution and an aspect ratio less than 1.5, a high aspect ratio magnetizable particle comprising an aspect ratio greater than 1.5, and a car... | 04/08/2008 |
| 7344587 | Magnetic ink tissue markings The invention provides tissue markings (such as tattoos) comprising magnetic particles, e.g., magnetite, and methods for making and altering, e.g., removing them. ... | 03/18/2008 |
| 7332101 | Permanently linked, rigid, magnetic chains One aspect of the present invention relates to a permanently linked, rigid, magnetic chain of particles prepared by sol-gel methods. A second aspect of the present invention relates to a method of preparing a permanently linked, rigid, magnetic chain of particles co... | 02/19/2008 |
| 7326360 | Cobalt ferrite based magnetostrictive materials for magnetic stress sensor and actuator applications Magnetostrictive material based on cobalt ferrite is described. The cobalt ferrite is substituted with transition metals (such manganese (Mn), chromium (Cr), zinc (Zn) and copper (Cu) or mixtures thereof) by substituting the transition metals for iron or cobalt to f... | 02/05/2008 |
| 7303679 | Oil spill recovery method using surface-treated iron powder A method of recovering spilled hydrocarbon fluids from a body of water utilizing the increased oleophilic properties of reacted iron particles suspended in a magnetorheological (MR) fluid. The iron particles normally used to create MR fluids, are reacted with an org... | 12/04/2007 |
| 7297323 | Method and apparatus for manufacturing fine particles A method of manufacturing fine particles of the invention includes introducing a reactive gas flow containing a fine particle source material into a reactor from one side, growing fine particles in a gas phase by heating the fine particle source material in the reac... | 11/20/2007 |
| 7288860 | Magnetic transducer with ferrofluid end bearings An electrical generator includes one or more magnets that move relative to one or more conductors to generate an electrical signal in each conductor. Each magnet has ferrofluid bearings in the vicinity of its opposite ends to provide a low friction interface between... | 10/30/2007 |
| 7276226 | Chromium dioxide (CrO) and composites of chromium dioxide and other oxides of chromium such as CrO/CrOand CrO/CrO) and process for manufacturing the same A novel process for preparing chromium dioxide of substantially high purity as well as composites of CrO2/Cr2O3 and CrO2/Cr2O5 following a sequence of simple steps. The process does not require pressu... | 10/02/2007 |
| 7252740 | (per) fluoropolyether carboxylic acids and use thereof for the oleo-repellent paper sizing Carboxylic acids comprising perfluoropolyether chains, of formula: T1—CFW1—O—Rf—CFW2—T2 (I) wherein T1, T2, equal to or different from each other, are sel... | 08/07/2007 |
| 7238298 | Ni-Cu-Zn-based ferrite material and process for the production thereof An Ni—Cu—Zn-based ferrite material contains TiO2 alone as an additive in an amount of 0.1 wt % | 07/03/2007 |
| 7232557 | Method for preparation of magnetic spinel ferrites from layered double hydroxide precursors The invention describes a method of preparing magnetic ferrites from layered precursors in which Fe2+ is first introduced into the layers of layered double hydroxides (LDHs) in order to prepare Me-Fe2+—Fe3+ LDHs, and then by utiliz... | 06/19/2007 |
| 7226544 | Magnetite particles Magnetite particles (and their manufacturing method) that enable suppression of blooming caused because of their large coercive force when used as magnetic toner, exert a light environment load, and are excellent in cost. The magnetite particles contain 0.1 to 1 mas... | 06/05/2007 |
| 7220482 | Aligned fine particles, method for producing the same and device using the same The present invention provides aligned fine particles that are aligned on a substrate. An organic coating film is bonded to surfaces of the fine particles is formed on the surfaces of the fine particles. An organic coating film bonded to a surface of the substrate i... | 05/22/2007 |
| 7217400 | Preparation of iron compounds by hydrothermal conversion An apparatus and continuous process for the conversion of one solid iron compound to another solid iron compound in a heterogeneous suspension wherein the suspension is formed by dispersing a solid starting iron compound in a liquid that is continuously fed through ... | 05/15/2007 |
| 7208134 | Bioprocesses enhanced by magnetic nanoparticles One aspect of the present invention relates to magnetic nanoparticles colloidally stabilized in aqueous milieu by association with an organic phase. The organic phase may be either a fluorinated polymer or an organic hydrocarbon bilayer, wherein the two layers are c... | 04/24/2007 |
| 7198732 | Rare earth metal compounds and mixtures of these Rare earth metal compounds are described which, due to their luminescence when irradiated with UV light, are suitable in particular for the marking of security-relevant items, such as documents or data carriers. ... | 04/03/2007 |
| 7169688 | Method and apparatus for cutting devices from substrates A method and system for cutting a wafer comprising a semiconductor substrate attached to an array of integrated devices includes placing the wafer on a stage such as a movable X-Y stage including a vacuum chuck having a porous mounting surface, and securing the wafe... | 01/30/2007 |
| 7147796 | Iron oxide particles and method for production thereof Iron oxide particles having the surface thereof coated with a layer of a complex iron oxide containing Al and Mg are disclosed. The total content of Al and Mg in the complex iron oxide layer is 0.1 to 2.5% by weight based on the whole iron oxide particles. The Mg co... | 12/12/2006 |
| 7144626 | Magnetic iron oxide particles and magnetic toner using the same There are provided magnetic iron oxide particles having an average particle diameter (Dp50) of primary particles of 0.05 to 0.3 μm, an average particle diameter (Da50) of secondary particles of 0.055 to 0.9 μm, and a ratio of the average part... | 12/05/2006 |
| 7145217 | Chip-type noise filter, manufacturing method thereof, and semiconductor package In a chip-type noise filter having a signal line of a conductor and a magnetic body disposed so as to adhere to the signal line, the magnetic body is a sintered body containing mainly Fe2O3 and containing NiO in the rest. This enables to effect... | 12/05/2006 |
| 7141618 | Coating compositions with modified particles and methods of using the same Powder coating compositions having improved mar and scratch resistance are disclosed. The coatings generally comprise one or more particles that have been modified to render the particles more surface active. The improved resistance is achieved without affecting the... | 11/28/2006 |
| 7105144 | Method for producing ferrite hollow particles A method for producing ferrite hollow particles having a hollow structure formed by mutual sintering of ferrite powder, including: a) a step of mixing a resin powder and a ferrite powder of a particle size smaller than that of the resin powder under compaction there... | 09/12/2006 |
| 7101489 | Composite magnetic material and a method for producing the same A composite magnetic material contains first magnetic particles made of a first magnetic material and second magnetic particles made of a second magnetic material, the first and second magnetic particles being mixed with each other. A frequency characteristic of the... | 09/05/2006 |
| 7070708 | Magnetorheological fluid resistant to settling in natural rubber devices A MR fluid formulation based upon a silicone liquid vehicle thickened with a treated fumed metal oxide and doped with one or more chemicals having hydrogen-bonding capability for use with natural rubber mounts. The MR fluid is resistant to settling of the magnetizab... | 07/04/2006 |
| 7070707 | Magnetorheological composition The invention provides a magnetorheological composition having reduced off-state forces and good performance. Specifically, this invention is directed to a magnetorheological composition that may comprise non-sperical magnetic-responsive particles and at least one f... | 07/04/2006 |
| 7052976 | Method and apparatus for cutting devices from conductive substrates secured during cutting by vacuum pressure A method and system for cutting a wafer comprising a conductive substrate attached to an array of integrated devices includes placing the wafer on a stage such as a movable X-Y stage including a vacuum chuck having a porous mounting surface, and securing the wafer d... | 05/30/2006 |
| 7034649 | Ferrite material, ferrite sintered body, and inductor A ferrite material having a high Q value and also having a small absolute value of αμir in a wide temperature range between −40° C. and 160° C. A ferrite material, which comprises, as main constituents, 45.5 to 48 mol % of Fe2O3, 5... | 04/25/2006 |
| 7011764 | Method for producing a magnetic device A magnetic device and method for making it involve a magnetic device specifically constructed of grains in a matrix. The matrix may be cement or plaster. The grains have an average diameter that is greater than their magnetic domains. The device may be applied to sh... | 03/14/2006 |
