| Patent Number |
Title Of Patent |
Date Issued |
| 6475565 |
Process for producing a clothing wire for open-end spinning |
November 5, 2002 |
| The invention relates to a process for producing a clothing wire which is suitable for fitting to an opening-cylinder base body, wherein a raw wire which is customarily used to produce clothing wire is processed on end to form a wire coil, in which the teeth of the wire are perpendicular |
| 6466738 |
Material for aging-resistant ceramic vaporizers |
October 15, 2002 |
| A ceramic material is provided containing 45 to 55% by weight TiB.sub.2 and 40.5 to 54.7% by weight BN and 0.1-1.5% by weight Ca in the form of a compound selected from the group consisting of the calcium oxides and calcium borates and mixtures thereof, which material contains from 0.2 t |
| 6347905 |
Connecting element for the frictional connection of components |
February 19, 2002 |
| A connecting element for the friction-increasing connection of workpieces which are to be joined, which is a thin resilient element which bears particles of a defined size at its surface, the particles being made from a material with a compressive and shear strength which exceeds that of |
| 6085025 |
Elliptical ceramic evaporators |
July 4, 2000 |
| An evaporator is provided for the evaporation of metal, which has a cross-sectional area in the region from which evaporation of the metal takes place which is greater than the corresponding cross-sectional area of a triangular evaporator of the same width and height and has, in the |
| 6081652 |
Ceramic flash TV evaporator |
June 27, 2000 |
| The invention relates to a flash TV evaporator for the evaporation coating of cathode ray tubes with aluminium, having a cavity from which the aluminium is evaporated when a current flows through the flash TV evaporator, wherein the width of the cavity tapers from the upper edge of t |
| 6010010 |
Process for reclaiming a grinding suspension |
January 4, 2000 |
| A process for reclaiming a consumed grinding suspension which has been used for machining silicon, quartz or ceramic is made from a cutting fluid, in which abrasive grain and abraded material are dispersed. In a first process step, the grinding suspension is carefully separated, by means |
| 5939185 |
Bearing material of silicon carbide |
August 17, 1999 |
| A bearing material of silicon carbide particularly useful for application in the hot water field is provided having improved corrosion resistance under increased thermal stresses wherein the bearing material is characterized by a predominantly course-grained silicon carbide matrix of |
| 5898008 |
Pore-free sintered bodies on the basis of silicon carbide which are suitable as substrates for h |
April 27, 1999 |
| Dense sintered bodies are provided whicha) comprise from 45 to 99.5 wt % of SiC, the SiC being present in the sintered body as a crystalline first phase, andb) comprise from 0.5 to 55 wt % of a sintering aid, from 0.5 to 30 wt % of which is selected from the group consisting of reaction prod |
| 5547709 |
Surface treatment of opening rollers for open end spinning |
August 20, 1996 |
| A process for surface treatment and wear resistant coating of opening rollers for open end spinning of the type having a basic metallic body and a raw wire clothing, includes the steps of introducing the opening roller into a sealing bath in such a way that this sealing bath fills even t |
| 5543370 |
Composite materials based on boron carbide, titanium diboride and elemental carbon and processes |
August 6, 1996 |
| A composite material includes boron carbide and titanium diboride in a volume ratio B.sub.4 C/TiB.sub.2 of from 90:10 to 10:90 parts and a proportion of elemental carbon greater than 2% by weight up to a maximum of 50% by weight, based on the boron carbide content. The composite mate |
| 5505899 |
Process for producing bodies based on boron carbide by pressureless sintering |
April 9, 1996 |
| A process for producing shaped bodies of boron carbide, metal diboride and carbon, which includes(a) homogeneously mixing pulverulent boron carbide with at least one pulverulent monocarbide of an element Ti, Zr, Hf, V, Nb and Ta in an amount corresponding to from 2% to 6% by weight of fr |
| 5372979 |
Composite materials based on titanium diboride |
December 13, 1994 |
| Composite materials are provided based on titanium diboride and processes for their preparation.The composite materials contain(1) 70 to 98% by volume of titanium diboride,(2) 1 to 15% by volume of Fe.sub.2 B and(3) 1 to 15% by volume of Ti.sub.2 O.sub.3and have the following properties:density |
| 5266263 |
Reprocessing of used evaporation boats |
November 30, 1993 |
| The invention relates to the reprocessing of used evaporation boats. This is done by a method which comprises comminuting used, aluminum-contaminated evaporation boats and roasting them in a nitrogen-containing atmosphere. |
| 5232951 |
Method of converting environmentally pollutant waste gases to methanol |
August 3, 1993 |
| A continuous flow method and system is provided for converting environmentally pollutant by-product waste gases emitted during the manufacture of silicon carbide in a first manufacturing plant to methanol in a second manufacturing plant such that release of the gases into the atmosph |
| 5045512 |
Mixed sintered metal materials based on borides, nitrides and iron binder metals |
September 3, 1991 |
| The invention relates to mixed sintered metal materials based on high-melting borides and nitrides and low-melting iron binder metals having the composition:(1) 40-97% by volume of borides, such as titanium diboride and zirconium diboride;(2) 1-48% by volume of nitrides, such as titanium |
| 4970036 |
Process for producing green compacts by molding sinterable ceramic mixtures based on silicon nit |
November 13, 1990 |
| The invention relates to a process for producing green compacts by the slip-casting process, injection-molding process or extrusion process from sinterable mixtures based on a starting powder mixture containing silicon nitride, and, if appropriate, aluminum nitride and/or alumina and oth |
| 4915589 |
Runner with mechanical coupling |
April 10, 1990 |
| A runner is provided which consists of a radial turbine ceramic rotor with an integrated ceramic shaft and a non-ceramic compressor impeller which are connected by a releasable, thermally and mechanically loadable mechanical coupling in such a way that the releasable mechanical coupling |
| 4885264 |
Pressure-sintered polycpystalline mixed materials with a base of hexagonal boron nitride, oxides |
December 5, 1989 |
| Pressure-sintered polycrystalline mixed materials, with a base of boron nitride, oxides and carbides, are provided in which the hexagonal boron nitride fraction is about 30 to about 85% by weight, the oxide fraction (ZrO.sub.2, MgO) is about 10 to about 50% by weight, and the carbide |
| 4814301 |
Polycrystalline sintered articles based on silicon nitride and sintering additives |
March 21, 1989 |
| The invention relates to polycrystalline sintered articles comprising at least 50% by weight of crystalline silicon nitride phase of which at least 90% by weight is in the .beta.-form, and at least one secondary crystalline intergranular silicate phase, and having a density of at least |
| 4803183 |
Dense molded bodies of polycrystalline aluminum nitride and process for preparation without use |
February 7, 1989 |
| The invention is a molded body of polycrystalline aluminum nitride having a density of at least 99.8% TD and comprising:at least 99% by weight AlNup to 0.35% by weight residual oxygenup to 0.35% by weight residual carbon andup to 0.03% by weight metallic impurities (Fe, Si, Ca, Mg).In the molded |
| 4756482 |
Process for the manufacture of sinterable silicon carbide and/or boron carbide powders |
July 12, 1988 |
| The invention is a process for the manufacture of sinterable silicon carbide and/or boron carbide powders having a maximum particle size of 1 .mu.m and finer. The process is carried out by wet grinding in aqueous suspension using mills charged with a grinding medium and with the addi |
| 4748313 |
Apparatus by the continuous vaporization of inorganic compositions by means of a photon-generati |
May 31, 1988 |
| An apparatus for the vaporization of inorganic compositions uses a photon-generating thermal source of radiation heat in a continuously operated vacuum vaporization processes. The apparatus includes a shaped body of the compacted vaporizable material prepared from pulverulent inorgan |
| 4743571 |
Polycrystalline sintered bodies on a base of silicon nitride with high fracture toughness and ha |
May 10, 1988 |
| Polycrystalline sintered bodies are provided consisting of at least 66% by weight of a crystalline Si.sub.3 N.sub.4 phase, of which at least 90% by weight is in the beta-modification, and of up to 34% by weight of secondary intergranular grain boundary phases of oxide, carbide and/or |
| 4732620 |
Thermoelement comprising a graphite/boron carbide thermocouple |
March 22, 1988 |
| The invention is an improved theroelement which comprises a graphite/boron carbide thermocouple, the arms of which are constructed as a tube and a rod, arranged concentrically inside the tube, which are electrically connected at one end. One of the arms of the thermocouple consists e |
| 4715812 |
Kiln furniture |
December 29, 1987 |
| Kiln furniture for supporting ceramic products to be baked in a high-speed baking kiln includes an inorganic fibrous material needled blanket having a plurality of depressions therein, and a plurality of separate basic bodies of a ceramic material mounted in the depressions and forming a |
| 4687655 |
Process for the manufacture of shaped articles from reaction-bonded silicon nitride by nitridati |
August 18, 1987 |
| The invention is a process for the manufacture of shaped articles of reaction-bonded silicon nitride in which pre-shaped articles of silicon powder are heated in a first stage under a nitrogen gas pressure of at least 6 MPa at a heating rate of not more than 50.degree. C. per hour to a |
| 4684480 |
Ceramic bonded neutron absorber plates of boron carbide and free carbon |
August 4, 1987 |
| The invention is a ceramically-bonded large-area neutron absorber articles of low density having a space filling ofabout 40 to 60% by volume boron carbide+silicon carbide in a B.sub.4 C:SiC ratio of about 9:1 to 1:9 andabout 10 to 20% by volume of free carbon, the remainder pores.They have a |
| 4661740 |
Polycrystalline sintered bodies based on lanthanum hexaboride, and a process for their manufactu |
April 28, 1987 |
| The invention is a polycrystalline sintered body based on lanthanum hexaboride and having a density of at least 95% of the theoretical density. The sintered body comprises lanthanum hexaboride, boron carbide and amorphous carbon, the content of B.sub.4 C+C being from 0.1 to 10% by we |
| 4642135 |
Process for treating cast iron melts with silicon carbide |
February 10, 1987 |
| The invention relates to a process for treating cast iron melts with silicon carbide. In this process, the silicon carbide used is subjected, before being introduced into the cast iron melt, to an oxidizing treatment in such a manner that the individual SiC granules are coated with a |
| 4637837 |
Process for boriding metals and metal alloys by means of solid boriding agents |
January 20, 1987 |
| A process is provided for boriding metals and metal alloys in a fluidized bed at a temperature of from about 580.degree. to about 1300.degree. C. As a boriding agent, there was used a granular material comprising essentially spherical particles having a particle size of from about 0.025 |
| 4634640 |
Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for thei |
January 6, 1987 |
| The invention is a shaped article of boron nitride having a density of at least 95% of the theoretical density which consists of polycrystalline hexagonal boron nitride in the form of a homogeneous isotropic microstructure and which has been manufactured from pure boron nitride powde |
| 4614724 |
Polycrystalline sintered compacts based on europium hexaboride and process for their manufacture |
September 30, 1986 |
| The invention relates to polycrystalline sintered compact based on europium hexaboride having a density of at least 85% of the theoretical density. The compacts comprise EuB.sub.6, from about 0.1 to 10% by weight of B.sub.4 C and, optionally, amorphous carbon, and have a total of Eu+B+C |
| 4564601 |
Shaped polycrystalline silicon carbide articles and isostatic hot-pressing process |
January 14, 1986 |
| The invention is substantially pore-free shaped articles which consist essentially of polycrystalline .alpha.- or .beta.-silicon carbide in the form of a single-phase homogeneous microstructure having grain sizes not exceeding 8 .mu.m, and which are manufactured from SiC powder, without |
| 4560668 |
Substantially pore-free shaped articles of polycrystalline silicon carbide, and a process for th |
December 24, 1985 |
| The invention is substantially pore-free shaped articles consisting essentially of polycrystalline silicon nitride and polycrystalline silicon carbide in the form of a homogeneous microstructure having grain sizes of not more than 10 .mu.m manufactured from mixtures of Si.sub.3 N.sub.4 |
| 4528120 |
Refractory, electrically conductive, mixed materials containing boron nitride and process for th |
July 9, 1985 |
| The invention is refractory, electrically conductive, mixed materials based on hexagonal boron nitride and at least one electrically conductive component such as titanium boride and zirconium boride, and having a density of at least about 95% of the theoretical density and nondirecti |
| 4524138 |
Substantially pore-free sintered polycrystalline articles of .alpha.-silicon carbide, boron carb |
June 18, 1985 |
| The invention provides substantially pore-free sintered polycrystalline articles comprising .alpha.-silicon carbide, boron carbide and free carbon, the quantitative proportions of which, in percent by weight, are defined by the trapezoidal area having, in the ternary system B/Si/C of |
| 4495123 |
Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for thei |
January 22, 1985 |
| The invention is a shaped article of boron nitride having a density of at least 95% of the theoretical density which consists of polycrystalline hexagonal boron nitride in the form of a homogeneous isotropic microstructure and which has been manufactured from pure boron nitride powde |
| 4467043 |
Dense shaped articles of polycrystalline .alpha.-silicon carbide and process for the manufacture |
August 21, 1984 |
| The invention relates to dense shaped articles of polycrystalline .alpha.-silicon carbide containing from 0.1 to 0.4%, by weight, of aluminum and optionally, a small amount of nitrogen and/or phosphorus, having a homogeneous virtually single-phase microstructure. The additional const |
| 4439214 |
Adsorption device for the dry purification of gases |
March 27, 1984 |
| The invention is a device for the dry purification of gases under low pressure by adsorption of the impurities, particularly hydrogen sulfide, on a fixed bed of adsorbent material. The entire surface of the gas adsorbent material is spread as a loose layer on the ground and is covered |
| 4381931 |
Process for the manufacture of substantially pore-free shaped polycrystalline articles by isosta |
May 3, 1983 |
| The invention relates to a process for the manufacture of substantially pore-free shaped articles of polycrystalline material such as aluminium oxide, titanium boride, silicon nitride or silicon carbide, in which pulverulent materials or preformed articles having pores open towards the |
| 4351858 |
Process for the manufacture of substantially pore-free shaped polycrystalline articles by isosta |
September 28, 1982 |
| The invention is a process for the manufacture of substantially pore-free shaped articles from polycrystalline material, such as tungsten carbide, silicon nitride, titanium boride or silicon carbide, in which encased articles preformed from pulverulent materials and having open pores are |
| 4326039 |
Dense shaped articles of polycrystalline .beta.-silicon carbide and process for the manufacture |
April 20, 1982 |
| The invention relates to dense shaped articles of polycrystalline .beta.-silicon carbide containing small amounts of aluminum and optionally, nitrogen and/or phosphorus, having a virtually single-phase microstructure since the additional constituents are substantially in the form of |
| 4252691 |
Neutron absorber based on boron carbide and carbon and a process for their production |
February 24, 1981 |
| The subject of the invention is thin large-area neutron-absorber plates having a volume composition of from 40 to 60% and preferably from 45 to 60% by volume of boron carbide, from 25 to 5% by volume and preferably 15 to 5% by volume of free carbon, the remainder being pores, a density o |
| 4195066 |
Process for the production of dense sintered shaped articles of polycrystalline boron carbide by |
March 25, 1980 |
| A method of producing dense shaped articles of pure boron carbide that optionally contain 0.1 to 8% by weight of free carbon in the form of graphite is disclosed involving the steps of homogeneously mixing boron carbide in submicron powder form with small quantities of a carbon conta |
| 4158744 |
Electrical resistance furnace for the production of silicon carbide |
June 19, 1979 |
| An electric resistance furnace for the production of silicon carbide from silicon dioxide and carbon has a U-shaped carbonaceous resistance core embedded in the burden of coke, quartz and other additives. The electrodes are disposed adjacent to each other and are connected to the resista |
| 4107276 |
Manufacture of hexagonal boron nitride |
August 15, 1978 |
| Process for the manufacture of hexagonal boron nitride which comprises causing a starting material containing an alkali metal boride or an alkaline earth metal boride, preferably a hexa- or dodecaboride, to react with nitrogen at temperatures of at least 900.degree. C and, if desired, |
| 3989883 |
Furnace installation operated by direct electrical heating according to the resistance principle |
November 2, 1976 |
| An electrical resistance furnace installation, especially for the production of silicon carbide, has no side walls. In the one arrangement, the installation has two end walls, each provided with an electrode, with the resistive core for heating reacting valves extending between the e |
| 3976829 |
Collector apparatus for gaseous reaction products |
August 24, 1976 |
| An electrical resistance furnace, especially for the production of silicon carbide, in which the furnace has a porous bed on its floor, and a gas flow is provided for withdrawing gaseous reaction products from the furnace. Alternatively, or in addition to the porous bed, a covering sheet |
| 3953487 |
Process for preparing hydrophobic silicon dioxide |
April 27, 1976 |
| Process for preparing hydrophobic SiO.sub.2 by reacting solid SiO.sub.2 of finest particle size with organosilicon compounds while subjecting the reaction mixture to a mechanical impact treatment which will at the same time result in a comminution of the SiO.sub.2 particles as well as of |
| 3950602 |
Furnace installation operated by direct electrical heating according to the resistance principl |
April 13, 1976 |
| In a furnace installation for producing silicon carbide in an intermittent operation, carbon electrodes arranged in the bottom of the furnace. A horizontally arranged resistance core is electrically connected to the carbon electrodes by vertically extending elements of an electrically |
