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| Number | Title | Issue Date |
| 3986847 | Vitreous bonded cubic boron nitride abrasive articles A vitreous bonded cubic boron nitride grinding wheel is provided which optionally contains silicon carbide or other abrasive having a coefficient of thermal expansion substantially the same as the coefficient of thermal expansion of cubic boron nitride, a... | 10/19/1976 |
| 3982911 | Process for the preparation of a composite cubic boron nitride layer abrasive body Cubic boron nitride (CBN) crystals of graded particle size are chemically cleaned and disposed in a protective metal cup together with a mass of substrate source material and a concentration of metal for providing an alloy for infusing and wetting the wal... | 09/28/1976 |
| 3976444 | Production of improved boron abrasives A boron abrasive is produced by crystallization of amorphous boron in the presence of and/or admixture with heavy metal borides. Boron filaments may be crystallized by being subjected to elevated temperatures, less than the melting point of boron, prior t... | 08/24/1976 |
| 3961104 | Internal cylindrical bearing surfaces A method of producing a hard wearing bearing surface on a component such as a cylinder or cylinder liner, by pressing an accurately screened hard powder in liquid medium into engagement with the surface and on a helical path, the pressure and powder size ... | 06/01/1976 |
| 3949062 | Method for producing polycrystalline diamond aggregates of predetermined shape A workpiece made of a non-diamond carbonaceous material and having dimensions exceeding those of a polycrystalline diamond aggregate by a contraction coefficient value of the non-diamond material during its transformation into a polycrystalline diamond ma... | 04/06/1976 |
| 3947555 | Process for the reclamation of uncemented tungsten carbide powders A process suitable for recovering refractory metal carbide values from contaminated uncemented refractory metal carbides containing an iron group metal comprises heating an admixture of the powders of the contaminated refractory metal carbides and glacial... | 03/30/1976 |
| 3944398 | Method of forming an abrasive compact of cubic boron nitride An abrasive compact comprising diamond or cubic boron nitride or mixtures thereof held in a matrix of a refractory substance and a substance which dissolves the abrasive particle to at least a limited extent. The compact may be made by subjecting a powder... | 03/16/1976 |
