Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7370739 | Shock absorber with a function of transmission of electric power between sprung and unsprung parts of a vehicle A shock absorber has a function of transmitting electric power between sprung and unsprung electrical components. The shock absorber includes a pair of conductive elements. The conductive elements are coupled electrically to each other. One of the conductive element... | 05/13/2008 |
| 7214343 | Method for producing granulated powder of R—FE—B type alloy and method for producing R—FE—B type alloy sintered compact The method for producing a granulated powder of the present invention includes the steps of: preparing an R—Fe—B alloy powder; and granulating the alloy powder using at least one kind of granulating agent selected from normal paraffins, isoparaffins and depolyme... | 05/08/2007 |
| 7199077 | Fischer-tropsch catalyst prepared with a high purity iron precursor A Fischer-Tropsch catalyst comprising iron and at least one promoter is prepared via a method which comprises the preparation of a high purity iron precursor and which uses a nominal amount of water in the catalyst production. The catalyst particles prepared with th... | 04/03/2007 |
| 7195661 | Magnetic material Magnetic materials having a coercivity not less than about 1000 Oersted are prepared in a single step procedure. A molten mixture of a desired composition having a relatively high boron content is cooled at a rate slower than about 105 degrees Celsius per... | 03/27/2007 |
| 7138043 | Method for applying a metal layer to a light metal surface A process for applying a metal layer to surfaces of light metals is proposed, in which iron is electrolytically deposited on the surfaces from a deposition bath containing Fe(II) compounds using dimensionally stable anodes insoluble in the deposition bath. The proce... | 11/21/2006 |
| 7048809 | Magnetic implement having a linear BH loop Magnetic powder having a large coercivity, Hc, is consolidated with a non-magnetic binder to form a magnetic implement having desired dimension and shape. The magnetic implement exhibits a linear B-H loop and low magnetic loss. It is capable of operating ... | 05/23/2006 |
| 6964693 | Method for forming chromium anisotropic metal particles A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material... | 11/15/2005 |
| 6939575 | Ferromagnetic metal powder, producing method of the same, and magnetic recording medium A ferromagnetic metal powder having an average long axis length of from 30 to 65 nm, a crystallite size of from 80 to 130 angstroms, a saturation magnetization (σs) of from 75 to 130 A·m2/kg, and an average oxide layer thickness of from 1.5 to 2.5 nm; a... | 09/06/2005 |
| 6827758 | Method for manufacturing magnetic metal powder, and magnetic metal powder A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reduc... | 12/07/2004 |
| 6702870 | Method for preparation of iron-based powder and iron-based powder The invention concerns a process permitting the preparation of a new powder, which as such or further processed is useful within a wide variety of different fields and which has magnetic and electric properties. The powder includes at least 0.5% by weight... | 03/09/2004 |
| 6676730 | Method of producing Nd-Fe-B based nanophase power The present invention relates to a method of producing Nd--Fe--B based nanophase powder, or more particularly, to a method of producing Nd2 Fe14 B phase powder of 1 μm or less, having Nd2 Fe14 B crystal grains ... | 01/13/2004 |
| 6524399 | Magnetic material Magnetic materials having a coercivity not less than about 1000 Oersted are prepared in a single step procedure. A molten mixture of a desired composition having a relatively high boron content is cooled at a rate slower than about 105 degrees Celsius per... | 02/25/2003 |
| 6517934 | Magnetic recording medium containing nanometer-size substantially spherical or ellipsoidal fe-b-re magnetic powder and method for producing magnetic powder A rare earth-iron-boron magnetic powder comprising a rare earth element, iron and boron, which has a coercive force of 80 to 400 kA/m, a saturation magnetization of 10 to 25 μW/g, an average particle size of 5 to 200 nm, and a particulate or ellipsoidal ... | 02/11/2003 |
| 6103021 | Method of preparing raw material powder for permanent magnets superior in moldability The present invention is directed to provide a method of preparing a raw material powder for permanent magnets superior in moldability, especially in moldability and productivity of bonded magnets. The method comprises subjecting an acicular iron powder h... | 08/15/2000 |
| 6051047 | Co-precipitation-reduction-diffusion process for the preparation of neodymium-iron-boron permanent magnetic alloys The present invention relates to the preparation of Nd--Fe--B permanent magnetic alloys and more particularly to a process of preparing Nd--Fe--B permanent magnetic alloys with neodymium, iron and boron as their basic constituents, wherein ammonium hydrox... | 04/18/2000 |
| 6036742 | Finely divided phosphorus-containing iron Finely divided phosphorus-containing iron is prepared by reacting iron pentacarbonyl with a volatile phosphorus compound, in particular PH3, in the gas phase. The resulting phosphorus-containing iron powders and iron whiskers have a particularl... | 03/14/2000 |
| 5968226 | Process of making goethite or iron-based alloy particles The disclosure describes spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients in which the Co content is 1.0 to 50.0 atm % (calculated as Co) based on the total Fe in the spindle-shaped magnetic iron-based ... | 10/19/1999 |
| 5925404 | Manufacturing method of magnetic material for metallic thin film magnetic recording media and metallic thin film magnetic recording medium The quantity of impurities in a magnetic material is decreased to produce a magnetic material with good quality, and a decrease in the cost of the magnetic material is realized by desulfurization. A magnetic raw material for metallic thin film magnetic re... | 07/20/1999 |
| 5865873 | Method of preparing raw material powder for permanent magnets superior in moldability The present invention is directed to provide a method of preparing a raw material powder for permanent magnets superior in moldability, especially in moldability and productivity of bonded magnets. The method comprises subjecting an acicular iron powder h... | 02/02/1999 |
| 5643491 | Rare earth magnetic powder, its fabrication method, and resin bonded magnet In a method of fabricating an R--Fe--B based alloy magnetic powder excellent in magnetic anisotropy, and an R--Fe--B--Co based alloy magnetic powder excellent in magnetic anisotropy and temperature characteristic an R--Fe--B based alloy is subjected to hy... | 07/01/1997 |
| 5630885 | Alloy ingot for permanent magnet, anisotropic powders for permanent magnet, method for producing same and permanent magnet An alloy ingot for permanent magnet consists essentially of rare earth metal and iron and optionally boron. The two-component alloy ingot contains 90 vol % or more of crystals having a crystal grain size along a short axis of 0.1 to 100 μm and that along... | 05/20/1997 |
| 5599378 | Spindle-shaped magnetic iron based alloy particles and process for producing the same Disclosed herein are spindle-shaped magnetic iron based alloy particles containing at least one selected from the group consisting of Ni, Al, Si, P, Co, Mg, B and Zn, which have a particle length of 0.05 to 0.40 μm, a crystallite size of 110 to 180 Å, a... | 02/04/1997 |
| 5512317 | Doped magnetic iron oxide particles and method of preparing the same A doped magnetic iron oxide particle suitable for use in magnetic recording media, and methods of preparing the doped magnetic iron oxide particle, are disclosed. The doped magnetic iron oxide particle has the general formula: Cox Fe+2 | 04/30/1996 |
| 5486240 | Carbide/nitride grain refined rare earth-iron-boron permanent magnet and method of making A method of making a permanent magnet wherein 1) a melt is formed having a base alloy composition comprising RE, Fe and/or Co, and B (where RE is one or more rare earth elements) and 2) TR (where TR is a transition metal selected from at least one of Ti, ... | 01/23/1996 |
| 5484628 | Preparation of acicular cobalt-containing magnetic iron oxide Acicular cobalt-containing magnetic iron oxides having a high coercive force and a core/shell structure and hence low temperature dependence of the coercive force are prepared by a process in which, in a first stage, surface activation is effected by mean... | 01/16/1996 |
| 5480471 | Re-Fe-B magnets and manufacturing method for the same A permanent magnet alloy and method for production thereof. The permanent magnet alloy has a rare earth element including Nd, B, Fe, C, and oxygen, with additions of Co and at least one of Cu, Ga and Ag. The alloy may be produced by contacting particles t... | 01/02/1996 |
| 5451245 | Process for producing magnetic metal particles Acicular magnetic iron particles comprising acicular iron substrate particles having first layer consisting of at least one of hydrous oxides and anhydrous oxides of aluminum and zirconium and mixtures thereof and second layer consisting of hydrous oxides... | 09/19/1995 |
| 5372629 | Method of making environmentally stable reactive alloy powders Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidifie... | 12/13/1994 |
| 5366761 | Method for preparing barium-ferrite-coated γFE2 O3 magnetic power A method for preparing a barium-ferrite-coated, needle-shaped γ-Fe2 O3 magnetic powder of better properties is provided. The method includes the following steps of a) letting an iron-containing solution undergo a reaction to precipi... | 11/22/1994 |
| 5242508 | Method of making permanent magnets A method for making an isotropic permanent magnet comprises atomizing a melt of a rare earth-transition metal alloy (e.g., an Nd--Fe--B alloy enriched in Nd and B) under conditions to produce protectively coated, rapidly solidified, generally spherical al... | 09/07/1993 |
| 5238483 | Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same Disclosed herein are acicular magnetic iron based alloy particles for magnetic recording, containing 1.5 to 10 mol % of B based on Fe (calculated as B) and 1.5 to 10 mol % of Co based on Fe (calculated as Co) in the vicinity of the surfaces of said partic... | 08/24/1993 |
| 5221322 | Method of making ferromagnetic ultrafine particles Ultrafine particles of Fe-Co-P material with a Fe/Co atomic ratio of from 95/5 to 70/30 and a (Fe+Co)/P atomic ratio of from 85/15 to 60/40 show improved ferromagnetic properties. The average particle size is from 0.005 to 0.1 μm. Such ultrafine particle... | 06/22/1993 |
| 5185093 | Process for producing magnetic metal powder and coating for magnetic recording medium A magnetic metal powder, having a large specific surface are, a high coercive force, a high dispersibility and an excellent corrosion resistance, is produced by converting an aciculate goethite having a silicon and/or aluminum compound layer formed thereo... | 02/09/1993 |
| 5183494 | Process for manufacturing rare earth-iron-boron permanent magnet alloy powders A process for producing rare earth-iron-boron permanent magnet alloy powders comprising; heating pellets comprising a mixture of rare earth oxides, iron power, ferroboron powder and calcium grandules for reaction/diffusion to obtain a rare earth-iron-boro... | 02/02/1993 |
| 5143542 | Process for producing magnetic metal powder for magnetic recording The present invention provides a process for producing magnetic metal powder for magnetic recording using a metal compound mainly composed of a hydrous iron oxide on an iron oxide, characterized in that prior to subjecting the metal compound mainly compos... | 09/01/1992 |
| 5096509 | Anisotropic magnetic powder and magnet thereof and method of producing same A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 μm and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 μm, wherein R represents one or more rar... | 03/17/1992 |
| 5085715 | Magnetically anisotropic bond magnet, magnetic powder for the magnet and manufacturing method of the powder A process for producing magnetically anisotropic powder having "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-... | 02/04/1992 |
| 5076836 | Process for the preparation of ferromagnetic metallic particles for magnetic recording A process for the preparation of ferromagnetic metallic particles for magnetic recording which comprises (I) a step of preparing a slurry of acicular iron oxide hydrate containing nickel and, if necessary, manganese, (II) a step of coating the surface of the a... | 12/31/1991 |
| 5064465 | Process for preparing rare earth-iron-boron alloy powders A process for preparing by a reduction/diffusion method rare earth-iron-boron alloy powders useful in permanent magnets. The process generates rare earth-iron-boron alloy powders having large and uniform particle sizes with minimal contamination. The proc... | 11/12/1991 |
| 5028278 | Ferromagnetic metal powder and process for preparation thereof A ferromagnetic metal powder comprises a ferromagnetic metal particle composed mainly of iron, a silicon compound layer formed on the surface of the ferromagnetic metal particle in such an amount that the amount of silicon is 0.1 to 1% by weight based on ... | 07/02/1991 |
