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| Number | Title | Issue Date |
| 4446357 | Resistance-heated boat for metal vaporization The resistance-heated boat of the present invention is comprised of a heating portion and a crucible portion separated by a heat conducting, substantially non-electrical conducting portion. The heating portion is fabricated of an electrically conductive materi... | 05/01/1984 |
| 4415510 | Process for making oxide refractory material having fine crystal structure Oxide refractory materials (for example, alumina-zirconia mixtures) can be cast to have an extremely fine crystal structure by casting them onto a non-reactive, non-melting particulate solid cooling media of a material other than that of the oxide refract... | 11/15/1983 |
| 4382104 | Method for coating alumina containing refractory fibers with chromium oxide A method for uniformly coating ceramic fibers comprising from about 40 to 100 weight percent aluminum oxide with Cr2 O3. The method comprises precipitating Cr2 O3.xH.sub.2 O (chromium oxide hydrate) upon the fib... | 05/03/1983 |
| 4332852 | Conditioned colloidal silica post impregnant to prevent binder migration in the production of insulation articles comprising randomly oriented refractory fibers An inorganic refractory insulation article comprising randomly oriented refractory fibers retained by dried colloidal silica uniformly distributed throughout the article and containing from about 0.001 to about 1.5 percent by weight of the article of alum... | 06/01/1982 |
| 4327186 | Sintered silicon carbide-titanium diboride mixtures and articles thereof Sintered articles made from binary compositions of silicon carbide and titanium diboride are described. The articles may be prepared by initially mixing finely-divided silicon carbide, carbon or a carbon source material, a densification or sintering aid, ... | 04/27/1982 |
| 4312911 | Chromium oxide coated refractory fibers A ceramic fiber and a shrink resistant article manufactured therefrom. The fiber comprises at least 80 weight percent of a refractory compound selected from the group consisting of silica, alumina, aluminum silicate, titania, zirconia, zirconium silicate ... | 01/26/1982 |
| 4312954 | Sintered silicon carbide ceramic body Pressureless sintering of silicon carbide to produce ceramic bodies having 75% and greater theoretical densities, can be accomplished by firing shaped bodies, containing finely divided silicon carbide, boron source such as boron carbide, carbon source suc... | 01/26/1982 |
| 4304954 | Apparatus for casting fused refractory oxides having high melting points The present invention provides a process and apparatus for the production of refractory oxide materials having high fusion points. By high fusion points is meant melting points greater than 2400° C. The process of the present invention comprises the steps of:... | 12/08/1981 |
| 4284610 | BN Bonded BN fiber article and method of manufacture A boron nitride bonded boron nitride fiber article and the method for its manufacture which comprises forming a shaped article with a composition comprising a bonding compound selected from boron oxide and boric acid and a structural fiber selected from t... | 08/18/1981 |
| 4277269 | Process for the manufacture of ceramic oxide fibers from solvent solution A process and apparatus for the manufacture of ceramic oxide fibers from solvent solution. The process comprises spinning a solution of a ceramic oxide precursor through openings having a diameter of from about 0.3 to about 1.5 millimeters, attenuating th... | 07/07/1981 |
| 4250605 | Biaxially stressed fluorinated polymer roll cover and method for making same A biaxially heat shrinkable sleeve, a prism which is usually a roller having its lateral area covered with a biaxially heat shrunken sleeve and the method for covering the lateral area of a prism such as a process roller with a biaxially heat shrunken sle... | 02/17/1981 |
| 4248752 | Refractory moldable composition A refractory moldable composition which, upon drying, sets up to refractory shapes which are strongly adherent to the molding surfaces and are essentially crack-free, contains about 45 to about 65% of a liquid vehicle, such as water; about 21 to about 26%... | 02/03/1981 |
| 4240833 | Shrink-resistant refractory fiber and process for making same A shrink resistant flexible ceramic fiber and its process of manufacture which comprises melting from about 40 to 65 weight percent of alumina with from about 35 to about 60 weight percent of silica, forming fibers from the melt, rapidly solidifying the f... | 12/23/1980 |
| 4240230 | Throw-away adaptors for grinding wheels An improved throw-away, or single use, adaptor particularly useful with depressed center grinding wheels is described. The adaptor comprises a hollow mandrel having an internal threaded portion for attaching the adaptor to the shaft of a grinding machine.... | 12/23/1980 |
| 4238547 | High strength yarn consisting of boron carbide fibers A process for strengthening carbide fibers by removing internal stresses caused by their formation. This process is accomplished by drawing the carbide fiber under tension through a furnace. The temperature of the furnace may range from about 2050° to 23... | 12/09/1980 |
| 4237085 | Method of producing a high density silicon carbide product A method of pressureless sintering silicon carbide mixtures to obtain a sintered, dense product when the silicon carbide starting materials do not include a densification aid, such as boron, beryllium or aluminum, is described. The starting materials are ... | 12/02/1980 |
| 4235586 | Gas ignition control An apparatus for fuel ignition comprising an electrical source for providing electrical current; an electrically operated fuel ignition means; a valve means which allows passage of fuel to the ignition means when the valve means is opened; a first valve c... | 11/25/1980 |
| 4233256 | Process for injection molding sinterable carbide ceramic materials Ceramic compositions that may be injection molded and subsequently sintered are described. A particulate ceramic material, such as silicon carbide, is coated with a mixture of thermoplastic resin and oils or waxes, and utilized as a feed material in an in... | 11/11/1980 |
| 4228344 | Method for providing electrical connection A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and... | 10/14/1980 |
| 4207226 | Ceramic composition suited to be injection molded and sintered Ceramic compositions that may be injection molded and subsequently sintered are described. The compositions include minor amounts of organo-titanates which materially reduce the viscosity of the compositions. The reduction in viscosity is particularly eff... | 06/10/1980 |
| 4207408 | High tenacity phenolic resin fibers Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2×10-3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of infusible cured phenolic resin fibers is signifi... | 06/10/1980 |
| 4205363 | Fuel ignitor comprising a novel silicon carbide composition A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and... | 05/27/1980 |
| 4204907 | Conditioned colloidal silica post impregnant to prevent binder migration The invention comprises the process for making an inorganic refractory insulation article by forming a fiber mat from a fiber slurry, impregnating the mat with a conditioned colloidal silica composition comprising colloidal silica, acid, aluminum chlorhyd... | 05/27/1980 |
| 4191730 | Method of removing nitrogen oxides from exhaust gas mixtures A method of removing nitrogen oxides (NOx) from exhaust gas mixtures is described. The removal of NOx from exhaust gas mixtures is accomplished by exposing the exhaust gas mixture, in a manner that does not substantially impede the g... | 03/04/1980 |
| 4179299 | Sintered alpha silicon carbide ceramic body having equiaxed microstructure Pressureless sintered silicon carbide ceramic bodies, having an equiaxed microstructure and an alpha crystalline habit can be produced by firing shaped bodies, containing finely divided silicon carbide, boron source such as boron carbide, carbon source su... | 12/18/1979 |
| 4178413 | Fiber reinforced carbon and graphite articles and a method of producing said articles The present invention relates to fiber reinforced carbon and graphite articles that are characterized by a matrix of fibrous carbon material bonded together by a deposited pyrolytic material and having the residue of a carbonized filler material dispersed... | 12/11/1979 |
| 4174331 | Refractory moldable composition containing ceramic fiber and colloidal silica A refractory moldable composition which, upon drying, sets up to refractory shapes which are strongly adherent to the molding surfaces and are essentially crack-free, contains about 45 to about 65% of a liquid vehicle, such as water; about 21 to about 26%... | 11/13/1979 |
| 4172109 | Pressureless sintering beryllium containing silicon carbide powder composition A sinterable silicon carbide mixture is described which is prepared by mixing finely-divided silicon carbide containing between about 0.5 and about 5.0 percent by weight of excess carbon with a finely-divided beryllium-containing additive wherein the amou... | 10/23/1979 |
| 4169584 | Gas injection apparatus Gas is injected into molten metal, such as aluminum, to purify the molten metal either of dissolved gases (degassing), or of dissolved solids such as magnesium ( "demagging"). The apparatus for accomplishing this injection contains two metallic bath chamb... | 10/02/1979 |
| 4166536 | Corrosive chemical containment system Corrosive chemicals are contained in metallic vessels, the inside portion of which is coated with a homogeneous, porous polymer containing inorganic filler. The particle size, shape and distribution provides a controlled porosity which allows entrapped pe... | 09/04/1979 |
| 4159205 | Process for producing polycrystalline oxide fibers A process for the manufacture of an aluminum oxide or zirconium oxide fiber comprising fiberizing a liquid containing lactic acid and an oxidizable compound selected from basic aluminum chloride, zirconium acetate and zirconium oxychloride and the resulti... | 06/26/1979 |
| 4157898 | Fused aluminum oxide abrasive grain containing reduced titanium oxide A fused abrasive grain, useful for inclusion in coated abrasives and bonded abrasives, consists essentially of alumina; titanium oxide containing from about 0.42 to about 0.84% titaniun, by weight of the abrasive grain, present as a reduced titanium oxide... | 06/12/1979 |
| 4157001 | Furnace linings There is disclosed a device for securing refractory and/or insulating material against a furnace wall. The device comprises a metal pin or stud which is attached to the wall at one end and is provided with a plurality of notched portions adjacent the othe... | 06/05/1979 |
| 4147186 | Thermal insulation assembly A thermal insulation assembly for use in conjunction with a similar assembly to encircle an elongated body, said assembly comprising a series of abutting similar U shaped elements which have similar radial and axial orientation, said series and orientatio... | 04/03/1979 |
| 4144207 | Composition and process for injection molding ceramic materials Ceramic compositions that may be injection molded and subsequently sintered are described. A particulate ceramic material, such as silicon carbide, is coated with a mixture of thermoplastic resin and oils or waxes, and utilized as a feed material in an in... | 03/13/1979 |
| 4135938 | High density thermal shock resistant sintered silicon carbide A dense thermal shock resistant silicon carbide ceramic body and its method of manufacture which comprises heat sintering a shaped body comprising particulate silicon carbide and an additive selected from boron nitride, boron phosphide, aluminum diboride ... | 01/23/1979 |
| 4135937 | High density hot pressed thermal shock resistant silicon carbide A method for making a dense thermal shock resistant silicon carbide ceramic body by hot pressing a blend of silicon carbide and from about 0.2 to about 2 weight percent of aluminum diboride and the resulting body.... | 01/23/1979 |
| 4132533 | Process for the production of spherical bonded abrasive from abrasive grain Spherical bonded abrasives, having a hollow core and comprising abrasive grain fused on the periphery of a thermoplastic carrier, are made by (1) heating thermoplastic support media, enveloped by abrasive grain, within the thermoplastic range for sufficie... | 01/02/1979 |
| 4130631 | BN Bonded BN fiber article from boric oxide fiber A boron nitride bonded boron nitride fiber article and the method for its manufacture which comprises forming a shaped article with a composition comprising boron oxide fibers and boric acid, heating the composition in an anhydrous gas to a temperature ab... | 12/19/1978 |
| 4124667 | Process for producing sintered silicon carbide ceramic body Pressureless sintering of silicon carbide to produce ceramic bodies having 75% and greater theoretical densities, can be accomplished by firing shaped bodies, containing finely divided silicon carbide, boron source such as boron carbide, carbon source suc... | 11/07/1978 |
