Abstract: Terminal equipment for electronically making patent and utility patent applications. The terminal equipment converts various formats of text data generated by an external device into the internal format of the terminal equipment, retrieves the converted text data, merges the text data with a procedure, and transmits the procedure. The merging operation in which image data is merged with text data is simplified whereby the operator can make applications with a simple operation without special skill and knowledge when an application document is transmitted and received on line.

Abstract: An aspect of the present invention relates to an iron nitride powder. The iron nitride powder is comprised chiefly of Fe16N2 and comprises, on at least a portion of the powder surface, a coating layer comprising at least one element selected from the group consisting of rare earth metal elements, aluminum, and silicon, and cobalt-containing ferrite having a composition denoted by (CoxFe1?x)Fe2O4, wherein 0<x?1. The present invention further relates to a method of manufacturing iron nitride powders and a magnetic recording medium comprising the iron nitride powder.

Abstract: Ferromagnetic nanoparticles which are produced by reducing, in the presence of a polymer, two or more metals having different reduction potentials twice or more, using two or more reducing agents having different reduction potentials, a material coated with a dispersion of ferromagnetic nanoparticles in which the ferromagnetic nanoparticles are dispersed, and a magnetic recording medium which has a magnetic layer consisting of the material. The ferromagnetic nanoparticles having a holding power Hc of 95.5 kA/m or more, the material coated with the dispersion of ferromagnetic nanoparticles having excellent industrial coatability, and the magnetic recording medium using the dispersion are provided.

Abstract: A magnetic recording medium including a substrate, a nonmagnetic layer containing nonmagnetic powder and a binder, and a magnetic layer containing ferromagnetic powder and a binder, in this order, wherein the nonmagnetic layer has a thickness of from 0.5 to 2.5 ?m, a specific surface area of from 20 to 120 m2/ml, a pore volume of from 0.15 to 0.40 ml/ml, and a median pore radius of from 3 to 16 nm, and the nonmagnetic layer has particles having an average particle diameter of from 4 to 14 nm on a magnetic layer side.

Abstract: Ferromagnetic nanoparticles which are produced by reducing, in the presence of a polymer, two or more metals having different reduction potentials twice or more, using two or more reducing agents having different reduction potentials, a material coated with a dispersion of ferromagnetic nanoparticles in which the ferromagnetic nanoparticles are dispersed, and a magnetic recording medium which has a magnetic layer consisting of the material. The ferromagnetic nanoparticles having a holding power Hc of 95.5 kA/m or more, the material coated with the dispersion of ferromagnetic nanoparticles having excellent industrial coatability, and the magnetic recording medium using the dispersion are provided.

Abstract: To provide a magnetic recording medium which undergoes little effect of thermal fluctuation and provides a high short wavelength output and C/N ratio when reproduction is conducted using MR head, the magnetic recording medium includes a non-magnetic layer having a non-magnetic powder dispersed in a binder provided on a support and a magnetic layer having a ferromagnetic powder dispersed in a binder provided on the non-magnetic layer, wherein the ferromagnetic powder comprises a hexagonal ferrite magnetic powder having an average diameter of from 10 to 35 nm and a coercive force of from 135 to 400 kA/m; the magnetic layer has a coercive force of from 135 to 440 kA/m; and a product of an anisotropic magnetic field of the magnetic layer and an average particle volume of the hexagonal ferrite magnetic powder is from 1.2×106 to 2.4×106 kA/m·nm3.

Abstract: To provide a magnetic recording medium which undergoes little effect of thermal fluctuation and provides a high short wavelength output and C/N ratio when reproduction is conducted using MR head, the magnetic recording medium includes a non-magnetic layer having a non-magnetic powder dispersed in a binder provided on a support and a magnetic layer having a ferromagnetic powder dispersed in a binder provided on the non-magnetic layer, wherein the ferromagnetic powder comprises a hexagonal ferrite magnetic powder having an average diameter of from 10 to 35 nm and a coercive force of from 135 to 400 kA/m; the magnetic layer has a coercive force of from 135 to 440 kA/m; and a product of an anisotropic magnetic field of the magnetic layer and an average particle volume of the hexagonal ferrite magnetic powder is from 1.2×106 to 2.4×106 kA/m·nm3.

Abstract: A process for producing a magnetic recording medium comprising the steps of applying a coating composition containing non-magnetic powder and a binder on a support to form a non-magnetic layer having a thickness of 0.5 to 2.5 ?m, a specific surface area of 20 to 120 m2/ml, a pore volume of 0.15 to 0.40 ml/ml, and a mean pore radius of 3 to 16 nm and applying a coating composition containing ferromagnetic powder and a binder on the non-magnetic layer to form a magnetic layer having a thickness of 25 to 150 nm.

Abstract: A magnetic recording medium comprising: a support; and at least a magnetic layer comprising a hexagonal ferrite powder and a binder, wherein the hexagonal ferrite powder is of magnetoplumbite type and has an average diameter of 15 to 35 nm and an alkaline earth element to iron ratio of 0.10 to 0.15 in terms of peak intensity ratio analyzed by electron spectroscopy for chemical analysis.

Abstract: A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder dispersed in a binder and a magnetic layer containing a ferromagnetic powder dispersed in a binder provided on the nonmagnetic layer, wherein the magnetic layer comprises a hexagonal ferrite powder having an average tabular diameter of from 10 to 35 nm, a coercive force (Hc) of from 135 to 400 kA/m, SFD (Switching Field Distribution) (25° C.) of from 0.40 to 0.90, and &Dgr; SFD [SFD (100° C.)−SFD (25° C.)] of from 0.15 to 0.20.

Abstract: A magnetic recording medium comprises a non-magnetic layer containing a non-magnetic powder abd a binder provided on a support, and a magnetic layer containing a ferromagnetic powder and a binder provided on the non-magnetic layer, wherein the magnetic layer contains a hexagonal ferrite magnetic powder having an average tabular diameter of 10 to 28 nm and has a coercive force (Hc) of 135 to 400 kA/m, a ratio (Hc/Hk) of the Hc to an anisotropic magnetic field (Hk) of 0.3 to 0.6, and a maximum value of &Dgr;M of 0 to 0.10.

Abstract: A method of producing hexagonal (system) ferrite, wherein the hexagonal (system) ferrite having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m is treated with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof when the ferrite is recovered and washed, and a magnetic recording medium comprising a support having thereon a non-magnetic layer comprising a non-magnetic powder and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder, wherein the ferromagnetic powder comprises a hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m and being subjected to treatment with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof.

Abstract: A ferromagnetic metal powder for magnetic recording containing iron as the main constituent and MAl2O4 (wherein M is a transition metal), wherein the coercive force (Hc) thereof is from 135 to 240 kA/m, the saturation magnetization (&sgr;s) is from 100 to 150 A·m2/kg, the average major axis length of the particles thereof is from 30 to 80 nm, the average acicular ratio of the particles is from 4.0 to 8.0, and the variation coefficient of the major axis lengths is from 3 to 25%. A magnetic recording medium having on a support a non-magnetic layer and at least a magnetic layer containing the above-described ferromagnetic metal powder, said medium has good short wavelength output and good S/N.

Abstract: A magnetic recording medium comprising: a support; and at least a magnetic layer comprising a hexagonal ferrite powder and a binder, wherein the hexagonal ferrite powder is of magnetoplumbite type and has an average diameter of 15 to 35 nm and an alkaline earth element to iron ratio of 0.10 to 0.15 in terms of peak intensity ratio analyzed by electron spectroscopy for chemical analysis.

Abstract: A magnetic recording medium having on a support a non-magnetic layer comprising a non-magnetic powder dispersed in a binder resin and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder dispersed in a binder resin, wherein the ferromagnetic powder is a Hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 35 nm and a coercive force (Hc) of 135 to 400 kA/m, and besides, the magnetic layer has a coercive force (Hc) of 135 to 440 kA/m, an anisotropic magnetic field of at least 358 kA/m and a rotational hysteresis loss integral of 0.5 to 0.95. Even when the magnetic recording medium is used in combination with an MR head, it can ensure high short-wavelength output, high C/N ratio and excellent recorded-magnetization stability.

Abstract: A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder dispersed in a binder and a magnetic layer containing a ferromagnetic powder dispersed in a binder provided on the nonmagnetic layer, wherein the magnetic layer comprises a hexagonal ferrite powder having an average tabular diameter of from 10 to 35 nm, a coercive force (Hc) of from 135 to 400 kA/m, SFD (Switching Field Distribution) (25° C.) of from 0.40 to 0.90, and &Dgr; SFD [SFD (100° C.)−SFD (25° C.)] of from 0.15 to 0.20.

Abstract: Ferromagnetic nanoparticles which are produced by reducing, in the presence of a polymer, two or more metals having different reduction potentials twice or more, using two or more reducing agents having different reduction potentials, a material coated with a dispersion of ferromagnetic nanoparticles in which the ferromagnetic nanoparticles are dispersed, and a magnetic recording medium which has a magnetic layer consisting of the material. The ferromagnetic nanoparticles having a holding power Hc of 95.5 kA/m or more, the material coated with the dispersion of ferromagnetic nanoparticles having excellent industrial coatability, and the magnetic recording medium using the dispersion are provided.

Abstract: A method of producing hexagonal (system) ferrite, wherein the hexagonal (system) ferrite having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m is treated with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof when the ferrite is recovered and washed, and a magnetic recording medium comprising a support having thereon a non-magnetic layer comprising a non-magnetic powder and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder, wherein the ferromagnetic powder comprises a hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m and being subjected to treatment with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof.

Abstract: A magnetic recording medium having on a support a non-magnetic layer comprising a non-magnetic powder dispersed in a binder resin and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder dispersed in a binder resin, wherein the ferromagnetic powder is a Hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 35 nm and a coercive force (Hc) of 135 to 400 kA/m, and besides, the magnetic layer has a coercive force (Hc) of 135 to 440 kA/m, an anisotropic magnetic field of at least 358 kA/m and a rotational hysteresis loss integral of 0.5 to 0.95. Even when the magnetic recording medium is used in combination with an MR head, it can ensure high short-wavelength output, high C/N ratio and excellent recorded-magnetization stability.

Abstract: A magnetic recording medium comprises a non-magnetic layer containing a non-magnetic powder abd a binder provided on a support, and a magnetic layer containing a ferromagnetic powder and a binder provided on the non-magnetic layer, wherein the magnetic layer contains a hexagonal ferrite magnetic powder having an average tabular diameter of 10 to 28 nm and has a coercive force (Hc) of 135 to 400 kA/m, a ratio (Hc/Hk) of the Hc to an anisotropic magnetic field (Hk) of 0.3 to 0.6, and a maximum value of &Dgr;M of 0 to 0.10.