Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6589667 | Spherical porous iron powder and method for producing the same The invention concerns an iron powder characterised by spherical form and a porous structure throughout. The powder particles have an average particle diameter between 10 and 300 μm, a specific surface area of at least 100 m2 /kg, a flowabilit... | 07/08/2003 |
| 6517602 | Solder ball and method for producing same A solder ball having a diameter of 1.2 mm or less, a dispersion of a diameter distribution of 5% or less and sphericity of 0.95 or more, an area ratio of the maximum dendrite being 80% or less of a cross section including a center of the solder ball, comp... | 02/11/2003 |
| 6312498 | Method of manufacturing solder balls Method for manufacturing solder balls is disclosed. The apparatus comprises a tundish, a vibrator, a cooling liquid tank, an inactive atmospheric chamber, a molten metal receiving tray, a ball collecting barrel and a cooling liquid reservoir. The tundish ... | 11/06/2001 |
| 5796018 | Process for coating iron particles with phosphorus and forming compacted articles Ferrous powder particles are coated with vaporized phosphorus in a fluid-bed reactor to obtain homogeneous coatings of phosphorus. The coated powders are useful feed for pressed structural parts, exhibiting improved green density, compressibility and sint... | 08/18/1998 |
| 5516481 | System for containerless processing of materials under a state of compensate-gravity A pressure medium composed of plural kinds of fluids each of which have a different density is charged in a pressure chamber forming, for example, fluid layers. A material is suspended by way of buoyancy brought by this pressure medium. By properly contro... | 05/14/1996 |
| 5338330 | Multiphase composite particle containing a distribution of nonmetallic compound particles A compacted, single phase or multiphase composite article. Particles for use in the compacted article are produced by providing a precursor compound containing at least one or at least two metals and a coordinating ligand. The compound is heated to remove... | 08/16/1994 |
| 5225123 | Methods for producing hollow microspheres made from dispersed particle compositions Method for making hollow microspheres of substantially uniform diameter and of substantially uniform wall thickness is disclosed. The walls of the hollow microspheres comprise sintered together particles which define interconnecting voids within the walls... | 07/06/1993 |
| 5143534 | Heat processing of particulate material with a quenching gas which swirls around the processing zone The invention relates to a method of heat processing particles of glass. A first current of a mixture of a combustible gas and a gas capable of oxidizing the combustible gas is introduced into a substantially cylindrical chamber from its lower end. The co... | 09/01/1992 |
| 4867931 | Methods for producing fiber reinforced microspheres made from dispersed particle compositions Fiber reinforced hollow microspheres made from dispersed particle film forming compositions including fibers, dispersed particles, a binder, a film stabilizing agent, a dispersing agent and a continuous liquid phase. Porous and non-porous fiber reinforced... | 09/19/1989 |
| 4810285 | Process for preparing spherical copper fine powder In a process for preparing a spherical copper fine powder having an average grain size ranging from 0.1 μm to a few μm, by use of chemical vapor deposition of cuprous chloride vapor with a reducing gas, the vapor deposition zone is maintained at a tempe... | 03/07/1989 |
| 4774037 | Method for producing solid or hollow spherical particles of chosen chemical composition and of uniform size A method is provided for producing commercially large quantities of high melting temperature solid or hollow spherical particles of a predetermined chemical composition and having a uniform and controlled size distribution. An end (18, 50, 90) of a solid ... | 09/27/1988 |
| 4756746 | Process of producing fine spherical particles A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of spherical particles selected from the group consisting of metals, metal alloys, ceramic glasses, crystalline ceramic materials, and c... | 07/12/1988 |
| 4723993 | Hydrometallurgical process for producing finely divided spherical low melting temperature metal based powders A process for producing finely divided spherical metal low melting temperatures powders comprises forming an aqueous solution metals, forming a reducible solid material from the solution, reducing the solid to metal powder particles, subjecting the metal ... | 02/09/1988 |
| 4705560 | Process for producing metallic powders A process is disclosed for producing essentially spherical metallic powder particles. The process involves mechanically agglomerating a mixture comprising powders wherein the powders are selected from the group consisting of metals, metal alloys, metal-ce... | 11/10/1987 |
| 4684401 | Chromium-cobalt fine alloy powder and process for producing same A chromium-cobalt alloy fine powder is disclosed which consists essentially of spheres with the chromium and cobalt being relatively uniformly distributed throughout the particles of the powder. The process for producing the powder is disclosed. The proce... | 08/04/1987 |
| 4673430 | Method for the production of nickel powder 1. An improved method for producing fine nickel powder having a substantially spherical form and size ranging from about 3 microns to about 7 microns, containing sulphur within a critical range of about 0.02% to about 0.05%, and possessing an improved deg... | 06/16/1987 |
| 4645532 | Production of fine spherical copper powder A process for the production of fine copper powder with particles having a size less than about 5 micrometers, comprises providing an ammoniacal cuprous salt solution, and neutralizing ammonia in said solution with acid in a substantially oxygen-free envi... | 02/24/1987 |
| 4606869 | Method of making air atomized spherical zinc powder The present invention provides a method for the production of spherically-shaped zinc powders using an atomization process. The method involves an alloying addition of lithium to the molten zinc prior to atomization. The invention also provides for spheri... | 08/19/1986 |
| 4582534 | Metal microspheres, filamented hollow metal microspheres and articles produced therefrom Hollow metal microspheres are made from film forming metal compositions and are used to make superior high strength light weight structures, improved insulating materials and insulating systems, or the microspheres can be used as filler materials in plast... | 04/15/1986 |
| 4565571 | Method for producing low density porous metals or hollow metallic spheres Disclosed are methods, utilizing electromagnetic levitation, for producing low density, porous metal structures and hollow metallic spheres, using particulate material as a starting point. As an initial step, a porous article of sufficient green strength ... | 01/21/1986 |
| 4502885 | Method for making metal powder A fine powder is prepared by directing a high velocity stream of molten droplets into a cooling fluid to form rapidly solidified powder. The powder is subjected to comminution at an energy sufficient to fragment at least a portion of the particles which a... | 03/05/1985 |
| 4457775 | Salt-coated magnesium granules A process is provided for producing salt-coated spheroidal granules of magnesium by employing a molten flux bath comprised of a salt composition of NaCl, KCl and CaCl2 maintained at a temperature in excess of the melting point of magnesium to w... | 07/03/1984 |
| 4419125 | Method for the preparation of brittle superconducting material in ultrafine particle form This is a method for preparing submicron-superconducting particles for use in forming a ductile superconductor wire from brittle superconducting compounds. The method utilizes preparing a mixture of solid metal halides containing essentially stoichiometri... | 12/06/1983 |
| 4390368 | Flame spray powder A free flowing plasma spray powder of substantially spherical particles having substantially smooth surfaces and of uniform composition consisting essentially of about 4 to about 6 percent by weight rhenium with the balance being tungsten.... | 06/28/1983 |
| 4264354 | Method of making spherical dental alloy powders A dental alloy powder containing silver, tin and copper and, optionally, other alloying metals which has been rendered spherical by a heat treatment to melt at least a surface stratum of the particles of the alloy, followed by cooling.... | 04/28/1981 |
| 4076637 | Metal dispersions and method for producing same A method for producing high density metal-containing lubricants and for comminuting metal into fine spherical particles is provided by heating a carrier fluid such as a lubricant, for example, and a metal until the metal becomes liquid, admixing the two c... | 02/28/1978 |
| 4035116 | Process and apparatus for forming essentially spherical pellets directly from a melt Process and apparatus for forming essentially spherical solid pellets directly from a melt, and particularly solid metal pellets such as iron and lead. The melt from a column of a preset height is directed through one or more orifices in a way to form a j... | 07/12/1977 |
| 4019842 | Apparatus for forming magnetite electrostatographic carriers In preferred form, the inventive concept utilizes a carbon arc plasma flame assembly wherein magnetic ore particles are fed to the plasma flame assembly in the presence of a controlled, gaseous atmosphere. The plasma flame assembly comprises a cathode and... | 04/26/1977 |
| 3975184 | Method and apparatus for production of high quality powders An electric arc which is struck between an electrode and the surface of a pool of molten material rotates under the influence of a magnetic field to thereby free liquid particles from the surface of the pool. The particles produced are quenched in an adja... | 08/17/1976 |
| 3962385 | Method for manufacturing spherical hollow particles A method for manufacturing spherical hollow particles by providing a large number of individual linear water jets arranged in a ring and converging at a single point, and passing a molten metal through this ring of water jets and converging point.... | 06/08/1976 |
