Matches 201 - 250 out of 356 < 1 2 3 4 5 6 7 8 >
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4543208 Magnetic core and method of producing the same  
Disclosed is an magnetic core comprising a molded product made of an iron powder and/or an iron alloy magnetic powder having a mean particle size of 10 to 100 μm, and 1.5 to 40%, as a total amount...
4519931 Magnetic fluid  
This invention provides a magnetic fluid which is diversified in hue and stable in the electric fields. The magnetic fluid of this invention is composed of a dispersion of ferromagnetic particles...
4478742 Preparation of a ferric acetate coated silica sol by selective anion exchange  
A method of producing iron acetate coated silica sol which comprises the steps of passing a mixture of ion-free colloidal silica and an inorganic iron salt in contact with a strong base anion...
4473483 Magnetic toner and ink  
A magnetic toner or ink is used in an electrophotography. It comprises a resinous component and a magnetic having a spinel structure and having the formula ##EQU1## wherein M represents at least...
4450086 Production of cadmium sulfide compositions having unusual magnetic and electrical properties  
Process for preparing cadmium sulfide compositions which are in a metasta state possessing greatly increased electrical conductivity and magnetic properties. The process comprises pressure...
4435302 Concentrating and reclaiming magnetic fluids  
Concentration and reclaiming of magnetic fluids is accomplished by (1) flocculation of the magnetic particles by addition of hydrochloric acid, (2) separation of the resulting flocculated...
4430239 Ferrofluid composition and method of making and using same  
A stable liquid composition which comprises a colloidal dispersion of finely-divided, magnetic particles in a liquid polar carrier and a dispersing amount of a surfactant, which surfactant...
4415464 Faraday rotation glass  
A Faraday rotation glass comprising, in mole %, TBL ______________________________________ P 2 O 5 5 to 30% where up to 5/6 on a molar basis of the P 2 O 5 can be replaced by B 2 O 3 ; ...
4376755 Production of crystalline refractory metal oxides containing colloidal metal precipitates and useful as solar-effective absorbers  
This invention is a new process for producing refractory crystalline oxides having improved or unusual properties. The process comprises the steps of forming a doped-metal crystal of the oxide;...
4356098 Stable ferrofluid compositions and method of making same  
A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a...
4338169 Process for promoting physical and/or chemical reactions performed in a fluid medium  
The process comprises subjecting a magnetic material dispersed in the fluid to the action of a variable magnetic field. It is thus possible to provide efficient stirring of this fluid and to...
4315827 Low-vapor-pressure ferrofluids and method of making same  
A stable ferrofluid composition which comprises a colloidal dispersion of finely-divided magnetic particles in a liquid, low-pressure, polyphenyl ether carrier and a dispersing amount of a...
4285819 Functional magnetic microspheres  
Functional magnetic particles are formed by dissolving a mucopolysaccharide such as chitosan in acidified aqueous solution containing a mixture of ferrous chloride and ferric chloride. As the pH of...
4285801 Electrophoretic display composition  
A suspension for electrophoretic display systems, such as the display systems shown in U.S. Pat. No. 3,668,106, is described. The particles in the suspension are coated with a highly fluorinated...
4280918 Magnetic particle dispersions  
A magnetic dispersion is prepared by adjusting the pH of a mixture containing magnetic particles to a value which results in a positive electrostatic charge on the particles, while a mixture...
4272596 Electrophoretic display device  
An electrophoretic display device which provides high contrast images and a stable suspending fluid is described. A white marking material such as titanium dioxide is suspended in a colloidal...
4272600 Magnetic toners containing cubical magnetite  
This invention is generally directed to magnetic toners comprised of a styrene butadiene copolymer resin, and a cubically shaped magnetite material, which toners have a fusing latitude range of at...
4253886 Corrosion resistant ferromagnetic metal powders and method of preparing the same  
Corrosion resistant ferromagnetic metal powders in which a volatile corrosion inhibitor is adsorbed on at least a part of the surface of ferromagnetic metal powders having an average particle size...
4234437 Suspension of solid particles in a liquid  
A suspension of solid particles in an organic or aqueous liquid comprises a lyotropic liquid crystal as suspension stabilizer.
4210448 Process for electrophotographic image formation and transfer  
Sharp, high-resolution copies of electrostatc images developed with a one-component magnetic toner can be obtained by corona transfer to a copy sheet if toner resistivity is at least 10 13 ...
4197357 Magnetic recording element in which a salt of an amine and a phosphoric acid ester are used as a dispersion agent  
An improved magnetic recording composition employing as a novel dispersion agent a salt of an amine and a mono- or diester of phosphoric acid with a higher olefinic alcohol or alkoxylated...
4196258 Magnetic recording medium and method of manufacturing same  
The invention relates to a magnetic recording medium, in particular a magnetic tape. It has been found that the addition of a silane compound containing a chlorinated hydrocarbon group, to the...
4168176 Glass for Faraday rotation elements  
A stable glass for a Faraday rotation element, the glass comprising, in mole%, 15 to 18% Ce 2 O 3 , 64 to 76% P 2 O 5 , 4 to 16% B 2 O 3 , 0 to 8% SiO 2 , and 0 to 10% Al 2 O 3 ...
4153754 Magnetic recording medium in which an N-acylsarcosine derivative is used as a dispersing agent  
The invention relates to a magnetic recording medium, for example a magnetic tape, which comprises a carrier and a magnetizable coating provided thereon which comprises a binder as well as a...
4125667 High surface area ferromagnetic carrier materials  
Classified high surface area carrier materials having a specific surface area of at least about 150 cm 2 /gram, a particle size volume distribution geometric standard deviation of less than about...
4109287 Process for recording information or sound and process for preparation of recording materials used therefor  
This invention provides a magnetic recording material having a regular orientation which comprises aluminum or aluminum alloy on the surface of which a film having a great number of micro pores is...
4094804 Method for preparing a water base magnetic fluid and product  
A water base magnetic fluid is provided by adding an unsaturated fatty acid with 18 carbon atoms or a salt thereof into a colloidal solution of a ferromagnetic oxide power in water, subsequently...
4045544 Process for the preparation of ferromagnetic chromium dioxide  
CrO 2 synthesized by the known hydrothermal reaction of CrO 3 /Cr 2 O 3 /H 2 O mixtures (including minor dopants) by the use of a reaction vessel having a hollow longitudinal core open at both...
4025448 Superparamagnetic wax compositions useful in magnetic levitation separations  
Superparamagnetic wax compositions useful in magnetic levitation separations of particle mixture based on density differences are provided which have the ability to withstand without phase...
4022701 High-performance anisotropic plastics magnet and a process for producing the same  
An anisotropic plastics magnet having a maximum energy product (BH)max not lower than 0.9 MG Oe, a remanence Br not lower than 2000G and a coercive force Hc not lower than 1800 Oe, and being...
4019994 Process for the preparation of aqueous magnetic material suspensions  
A process for the preparation of aqueous magnetic oxide suspensions is described.
4007314 Magnetic recording medium with silane lubricant  
A magnetic recording medium including a flexible non-magnetic film base and a magnetic layer thereon consisting of magnetizable particles in a resinous binder, the magnetic layer containing or...
4003840 Microwave absorber  
Microwave absorber comprising a mixture of ferrite powder having particle size of less than 1.65 mm and an organic high molecular weight compound.
4001363 Method of manufacturing a ceramic ferromagnetic object  
A method of manufacturing a formed, ferromagnetic object, particularly an annular memory core, in which a quantity of ferrite powder, a ferrite sol and a polymerized, organic compound are mixed to...
4001288 Magnetic organo-iron compounds  
An organo-iron compound or complex, having an X-ray diffraction pattern similar to that of magnetite and containing from 25 to 50 per cent or more iron, is water soluble and exhibits strongly...
3981844 Stable emulsion and method for preparation thereof  
An emulsion of water; a water immiscible liquid including a solution of a liquid nonpolar hydrocarbon and a liquid halogenated aliphatic hydrocarbon; and a colloidal suspension of magnetic...
3971723 Glass for Faraday rotator element  
Glass for use as an element of a Faraday rotator, consisting essentially of, by mol%, 10-30 Tb 2 O 3 , 10-30 Al 2 O 3 , and 30-80 SiO 2 + B 2 O 3 , with the proviso that SiO 2 ≥15 and B 2 O...
3970687 Polyesters with substituted amine end groups  
Polyester represented by the general structure ##EQU1## useful as film-formers in coating compositions.
3963829 Rare earth manganese silicides  
Compositions of the formula GdMn 1 -x Fe x Si where 0<x≤0.5 or LnMnSi where Ln is at least one of Gd, La or Y can be made by heating stoichiometric amounts of the elements or composition of...
3955295 Data bearing card having an aesthetic, magnetizable, colorless, transparent coating thereon  
A data bearing card having a magnetizable, transparent, colorless coating thereon is disclosed. The coating can comprise a transparent, colorless plastic matrix containing a dispersed particulate...
3944329 Faraday rotator device including lithia-silicate glass articles containing Tb.sub.2 O.sub.3 and methods of using same  
There is disclosed a Faraday rotator device suitable for radiation phase shifters, isolators and shutters, that operate in the visible and infrared regions of the electromagnetic spectrum. The...
3928870 Magneto-optical processes and elements using tetrahedrally coordinated divalent cobalt-containing magnetic material  
A magneto-optical readout process which employs a tetrahedrally coordinated divalent cobalt-containing magnetic material is provided. This magnetic material exhibits giant magneto-optical effects...
3922687 Means and method for creating a visible display utilizing high sensitivity magnetochemical particles  
Improved means and method for creating a visible display utilizing magnetochemical particles that respond to a magnetic field by exposing an interface capable of reacting chemically with a...
3917723 Process for the continuous manufacture of m-chloronitrobenzene from m-dinitrobenzene  
Preparation of m-chloronitrobenzene by partial chlorinating denitration of m-dinitrobenzene with chlorine under normal or reduced pressure at elevated temperatures.
3917538 Ferrofluid compositions and process of making same  
A process for preparing irreversibly flocked magnetic particles, which process increases the versatility of the size-reduction process for the preparation of ferrofluids. The process comprises...
3904540 Magnetic impulse record member  
A magnetic impulse record member comprising a binding medium and synthetic magnetic gamma ferric oxide, said member having an orientation ratio of at least 2.4 in a 1000 oersted field, said ferric...
3900415 Magnetic glass  
A magnetic glass prepared from calcination of an alkali metal alumino silicate and iron sulfide.
3867299 METHOD OF MAKING SYNTHETIC RESIN COMPOSITES WITH MAGNETIC FILLERS  
A method of producing synthetic resin composites with small size magnetic fillers. A magnetic field is applied during composite forming to give improved mechanical properties.
3855137 HYDROCARBON GELS  
A composition of matter comprising a gelatinous hydrocarbon containing a minor amount of a compound having either the formula MOR or ##SPC1## In combination with a compound having the formula...
3775069 HYDROCARBON GELS CONTAINING METAL ALKOXY GELLANTS AND A DEHYDRATING AGENT  
A composition of matter comprising a gelatinous hydrocarbon containing a minor amount of a compound having either the formula MOR or ##SPC1## in combination with a compound having the formula...
Matches 201 - 250 out of 356 < 1 2 3 4 5 6 7 8 >