Koso
Koso Aoki, Otake-Shi JP
Patent application number | Description | Published |
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20080206566 | Black magnetic iron oxide particles - The present invention relates to a black magnetic iron oxide particles each having a polyhedral shape wherein when a percentage of dissolution of iron element based on a total amount of iron element contained in the black magnetic iron oxide particles is 50%, a percentage of dissolution of sulfur element based on a total amount of sulfur element contained in the black magnetic iron oxide particles is less than 40%. | 08-28-2008 |
20090311617 | BLACK MAGNETIC IRON OXIDE PARTICLES, MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND TWO-COMPONENT DEVELOPER - The present invention relates to black magnetic iron oxide particles having an average particle diameter of 0.05 to 2.0 μm and an electric resistance value at an applied voltage of 100 V of not less than 1×10 | 12-17-2009 |
20130330556 | ANILINE BLACK, AND RESIN COMPOSITION AND WATER-BASED AND SOLVENT-BASED DISPERSIONS USING THE ANILINE BLACK - The present invention provides aniline black comprising no harmful substances such as chromium and copper in its products and having an excellent blackness and a high resistivity value, as well as provides a black resin composition, a water-based dispersion and a solvent-based dispersion which are colored with the aniline black and have an excellent dispersibility. The aniline black according to the present invention has a sulfur content of 0.2 to 6.0% by weight and comprises primary particles having an average major axis diameter of 0.05 to 0.80 μm. | 12-12-2013 |
Koso Aoki, Hiroshima-Ken JP
Patent application number | Description | Published |
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20140051020 | MAGNETIC IRON OXIDE PARTICLES, MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS AND PROCESS FOR PRODUCING THE SAME, AND TWO-COMPONENT SYSTEM DEVELOPER - The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which the plurality of granules are bonded. | 02-20-2014 |
Koso Ishihara, Mie JP
Patent application number | Description | Published |
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20090109602 | METHOD FOR MANUFACTURING ELECTROLYTIC CAPACITOR AND ELECTROLYTIC CAPACITOR - A method for manufacturing an electrolytic capacitor comprising: forming a capacitor element having an anode foil and a cathode foil; impregnating the capacitor element with a dispersion solution containing particles of an electrically conductive solid or aggregates thereof and a dispersion solvent to form an electrically conductive solid layer having the particles of the electrically conductive solid or the aggregates thereof in the capacitor element; and impregnating the capacitor element having the electrically conductive solid layer with a solvent containing no supporting salt. | 04-30-2009 |
20090122470 | SOLID ELECTROLYTIC CAPACITOR - A solid electrolytic capacitor according to the present invention has: a capacitor element ( | 05-14-2009 |