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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 4246003 | Lap cutting abrasive A lap cutting abrasive for use with lap cutting blades, comprising one part y weight of a low viscosity carrier liquid, and one to three parts by weight of cutting particles having an average size of from 10 to 50 μm suspended in the carrier liquid. The c... | 01/20/1981 |
| 4243395 | Method for precision grinding of hard, pointed materials A method of lapping the sharp point of a hard material using a silicon oxide, glow discharge deposited abrasive layer wherein the abrasive layer is thick enough to prevent penetration of the point into the substrate.... | 01/06/1981 |
| 4236357 | Etched metal abrasives An etched metal abrasive formed from a laminated sheet of steel having a top layer of high carbon steel and a base layer of low carbon steel.... | 12/02/1980 |
| 4203732 | Method of making an abrasive product The invention provides a method of making an abrasive product, e.g. a grinding wheel rim, which consists in providing a mixture of needle-shaped abrasive particles and the starter ingredients for a bonding matrix, causing the mixture to flow, preferably i... | 05/20/1980 |
| 4196181 | Microcrystalline monolithic carbon material A material consisting of grains varying in size from 0.1 to a few microns intergrown so as to form regular aggregates. The geometric shape of the material is preset by a pattern made from a carbon-bearing non-diamond material and corresponds to the shape ... | 04/01/1980 |
| 4190422 | Metallic abrasive produced from a steel mill waste material A method for preparing a steel mill waste material comprised of inner metallic cores encased in outer shells of iron oxides for use as size-graded metallic abrasives and the product so produced are described. The waste material is screened to simultaneously se... | 02/26/1980 |
| 4175930 | Method for finishing surfaces of non-magnetic articles by means of ferromagnetic abrasive powder in magnetic field A method for surface finishing of non-magnetic articles by means of ferromagnetic abrasive powders in a magnetic field, wherein ferromagnetic powder is introduced into the magnetic field produced by oppositely positioned unlike poles of a magnetic system ... | 11/27/1979 |
| 4154026 | Abrading tool A tool for releasably supporting a length of abrasive strip material in a generally cylindrical coil with its abrasive surface out and for transferring torque from a drive chuck to rotate the coiled strip about its axis so that the outer surface of the st... | 05/15/1979 |
| 4150514 | Process for molding bonded refractory particles A process is disclosed for molding a mixture of refractory particles, and especially abrasive refractory particles, and an organic resinous binder into an integral body. The mixture is preheated, preferably by microwave energy, in the absence of pressure ... | 04/24/1979 |
| 4145385 | Paste extrusion of PTFE The fibrillated surface layer of an unsintered extruded mass of a polytetrafluoroethylene is broken by mechanical or electrical force to facilitate evaporation of the lubricant whereby a molded article which is free from defects such as cracks and blister... | 03/20/1979 |
| 4118459 | Chemically removing iron from grits Iron is removed from grits, e.g. crushed corundum by contacting the grits with aqueous hydrochloric acid for dissolving of the iron and provision of a suspension of the grits in the acedic aqueous medium; water is added to the suspension and it is then ce... | 10/03/1978 |
| 4073096 | Process for the manufacture of abrasive material Process for the manufacture of abrasive material in which (1) an abrasive mix is brought to fusion as in an electric arc furnace, (2) a relatively cold substrate is dipped into the molten material whereby a layer of solid abrasive material is quickly froz... | 02/14/1978 |
| 4070796 | Method of producing abrasive grits Abrasive grits are prepared from molten oxide melt by pouring molten abrasive composition between plurality of spaced plates, made of heat resistant material such as graphite or metal to protect surface of molten abrasive from atmosphere and achieve rapid... | 01/31/1978 |
| 4054425 | Process of making a grinding wheel assembly A method of making grinding wheel mounts by molding a central hub onto a thermoset plastic abrasive disc is provided. An aromatic polycarbonate thermoplastic resin is molded to form a hub on a cured thermoset plastic abrasive disc. It is believed that the... | 10/18/1977 |
| 4054426 | Thin film treated drilling bit cones A thin film treatment of rock formation drilling bits mounting a plurality of toothed rotatably mounted cones with cones having hard surface films deposited on the outer surface by a high particulate energy level ion plating process on the cone carrier ma... | 10/18/1977 |
| 4049397 | Process for the preparation of granulated abrasives from fused or sintered refractory inorganic hard substances having a high grain toughness A process for the manufacture of granular abrasives having improved grain toughness from refractory, inorganic hard substances which comprises crushing a lump or block of said refractory inorganic substance, thereafter subjecting the resultant grains to a... | 09/20/1977 |
| 4020820 | Process for truing grinding wheels A process for truing bonded, diamond and boron nitride grinding wheels utilizing a special tool made of molybdenum, or closely related metals including tantalum and columbium as the truing or dressing tool. Such a special tool is held in frictional contac... | 05/03/1977 |
| 4021209 | Aramid fiber reinforced abrasive wheel An improved abrasive grinding wheel such as a cutoff or snagging wheel, including a reinforcing fabric of aramid fibers.... | 05/03/1977 |
| 3985521 | Method for producing a grinding foil A grinding foil which is to be used for grinding a record cutting or playback stylus is manufactured by providing a surface layer of a plastic foil with indentations for accommodating a grinding agent in granular form, filling the indentations with such g... | 10/12/1976 |
| 3974971 | Grinding discs for defibering fibrous material Grinding discs in apparatus for manufacture of pulp composed of a support disc and segments mounted on said support disc so as to form a ring. The segments are formed with ribs and grooves for breaking down the material to be ground. The outer and inner p... | 08/17/1976 |
| 3967418 | Work polishing tool and method of making same A work-polishing tool including a rigid annular core having at spaced intervals around its periphery strips of readily-deformable material such as sheet rubber. These strips extend radially outwardly from the core and each has leaves of abrasive fabric se... | 07/06/1976 |
| 3960518 | Method of forming a cutting tool A cutting tool is disclosed comprising a plurality of blocks of composite, comminuted abrasive in a bonding matrix, connected to a metallic substrate by a braze comprising a layer of an elastically pliant metal having high thermal conductivity sandwiched ... | 06/01/1976 |
| 3950149 | Method for continuously producing resinoid wheels An abrasive composition prepared by kneading abrasive grains and a binder together, with addition of a filler when desired, is molded into a block, which is heated by a high-frequency wave heater and then passed between multiple pairs of rolls and thereby... | 04/13/1976 |
