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| Number | Title | Issue Date |
| 4571312 | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing Sintering and gas hot isostatic pressing are used to prepare polycrystalline yttria-gadolinia ceramic scintillator bodies. Multicomponent powder compacts, formed by cold pressing and cold isostatic pressing, are sintered to the closed porosity stage. The ... | 02/18/1986 |
| 4571315 | Preparing ceramic material pellets Ceramic pellets, which may have, or not, nuclear fuel materials embedded therein, are formed by first preparing a gel by precipitation of metallic salts from solutions of their compounds at a concentration of at least 10 grams per liter, said solutions be... | 02/18/1986 |
| 4541974 | Semiconductive ceramic compositions with a nonlinear volt-ampere characteristic, and process for preparing coherent bodies of such compositions Ceramic materials suitable for use in varistors, enabling the same to function both as such and as capacitors. The ceramic compositions comprise a major proportion of SrTiO3, the balance being (1) one or more of Nb2 O5, Ta... | 09/17/1985 |
| 4534721 | Brick-forming vacuum press A brick-forming vacuum press is provided with a die and top and bottom plungers which are disposed along the same vertical central axis as the die. Spaces which extend from the die and surround the top and bottom plungers are enclosed by chambers formed o... | 08/13/1985 |
| 4526734 | Process for the production of silicon carbide sintered bodies A process for producing a silicon carbide sintered body is disclosed, which comprises the steps of charging a sintering raw material consisting mainly of silicon carbide fine powder and sintering aid into a dispersion medium together with, if necessary, a... | 07/02/1985 |
| 4524039 | Moulding of construction products A method of manufacturing construction products which involves feeding dry or substantially dry constituents including a liquid-setting powder and a reinforcement therefor into a molding zone. At least a part of the mold is vibrated to effect compacting o... | 06/18/1985 |
| 4522772 | Moulding of articles Construction products are moulded by mixing the dry constituents, including a proportion of fine particulate material, feeding (1, 2) the mixture into a mould (5), compacting the mixture, removing part (6) of the mould (5), lightly spraying (9) an exposed... | 06/11/1985 |
| 4521355 | Method of producing ceramic ware A method of producing decorative ceramic ware is disclosed. In the first step, a flocculant is added to an aqueous suspension containing as main solid components a fibrous material and a ceramic raw material clay, followed by preparing ceramic raw materia... | 06/04/1985 |
| 4519766 | Apparatus for manufacturing three-dimensional work pieces A three-dimensional work piece, such as an interior part for a car, is manufactured by keeping the blank, such as a sheet of plastic on or in the same primary mold (24) for the initial shaping step, for the foaming step, for the curing step and for the fi... | 05/28/1985 |
| 4520117 | Refractory articles and the method for the manufacture thereof In a process for making refractory articles, such as cores and moulds for use in casting metals, the articles are formed from dies using a refractory material mixed with a thermosetting resin. The articles are formed with the mixture heated to a softened ... | 05/28/1985 |
| 4519568 | Apparatus for constructing modular pre-cast concrete buildings An apparatus for constructing a unitary pre-cast concrete modular building unit comprising: a collapsible outer form having a rigid rectangular base and rigid walls pivotally connected thereto and collapsible to the plane of said base; a hydraulically ret... | 05/28/1985 |
| 4518545 | Method for sintering high density yttria-gadolinia ceramic scintillators A method for preparing high density yttria-gadolinia ceramic scintillators by cold-pressing multicomponent powder to form powder compacts and then sintering the compacts to form transparent-to-translucent ceramic scintillator bodies. The powder compacts a... | 05/21/1985 |
| 4518546 | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing Sintering and gas hot isostatic pressing are used to prepare polycrystalline yttria-gadolinia ceramic scintillator bodies. Multi-component powder compacts, formed by cold pressing cold isostatic pressing, are sintered to the closed porosity stage. The den... | 05/21/1985 |
| 4518397 | Articles containing non-fused aluminum oxide-based abrasive mineral The invention relates to synthetic, non-fused, aluminum oxide-based abrasive mineral having a microcrystalline structure of randomly oriented crystallites comprising a dominant continuous phase of -alumina and a secondary phase, to a method of maki... | 05/21/1985 |
| 4516927 | Pointed heat-generating device for molds of injection molding machines This invention relates to a pointed heat-generating device for molds of injection molding machines. It comprises a metal casing, a pointed projectile heat-generating means fixed with the metal casing, and a gate formed at the pointed heat-generating means... | 05/14/1985 |
| 4515552 | Release and carry-out apparatus A release and carry-out apparatus is disclosed for removing a mold from a molding such as a concrete panel, and carrying out the molding to a predetermined position. This release and carry-out apparatus comprises: a base frame; an erectable frame erectabl... | 05/07/1985 |
| 4515742 | Continuous inorganic fibers and process for production thereof Continuous inorganic fibers consisting substantially of Si, Zr and C and optionally of O, said fibers being composed of (1) an amorphous material consisting substantially of Si, Zr and C and optionally of O, or (2) an aggregate consisting substantially of... | 05/07/1985 |
| 4514346 | Method of making thermal-shock resistant molded articles on the basis of silicon carbide Refractory parts or articles, even of very large dimensions, are made with starting material of carbon particles mixed with silicon particles in a predetermined ratio which is suspended in a solution of a binder, after which the suspension is squirted int... | 04/30/1985 |
| 4511524 | Carbon resistor and method for producing same A carbon resistor and a method for producing the resistor are disclosed. The method preferably comprises the steps of preparing a uniform, finely-divided mixture by blending a glass frit with at least one temporary binder and substantially 1/4 to 4 percen... | 04/16/1985 |
| 4510112 | Process for fabricating ZnO-based varistors The invention is a process for producing ZnO-based varistors incorporating a metal oxide dopant. In one form, the invention comprises providing a varistor powder mix of colloidal particles of ZnO and metal-oxide dopants including Bi2 O3. | 04/09/1985 |
| 4510107 | Method of making densified Si3 N4 /oxynitride composite with premixed silicon and oxygen carrying agents A method is disclosed for making a more densified silicon nitride comprising object under less stringent heating conditions without sacrificing physical properties. A mixture of silicon powder, 6-18% yttrium silicon oxynitride (a major proportion of which... | 04/09/1985 |
| 4508667 | Manufacture of highly porous refractory material A method of manufacturing a highly porous refractory material by feeding raw material in discrete particle form into the hot zone of a furnace chamber, the method including the initial step of making a slurry of the raw material and feeding the slurry int... | 04/02/1985 |
| 4508499 | System for manufacturing three-dimensional work pieces A system for manufacturing three-dimensional work pieces, such as interior automobile components, includes several cooperating stations arranged in such a way that a hingeable mold member connected to a hinging frame may cooperate with another mold member... | 04/02/1985 |
| 4505871 | Method for manufacturing an object of silicon nitride Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to ... | 03/19/1985 |
| 4505866 | Process for producing a boehmite shaped product and a burned boehmite shaped product A process for producing a boehmite shaped product comprises slurrying a mixture of a gibbsite powder and at least one powder selected from the group consisting of powders of pseudo-boehmite, amorphous aluminum hydroxide, alumina cement and .rho.-alumina, ... | 03/19/1985 |
| 4500482 | Method of manufacture silicon nitride ceramic molded articles A blank is molded from a powdery mixture of silicon, -silicon nitride, and a sintering agent. The blank is nitrided to nitride the silicon content of the blank, and thereafter the blank is subjected to hot isostatic pressing. The silicon content of... | 02/19/1985 |
| 4496515 | Method for cutting gypsum board with high velocity fluid cutting jet Gypsum board is formed into a continuous sheet by depositing an aqueous slurry of calcium sulfate hemihydrate, including conventional additives, between two paper cover sheets on a moving conveyor. After the slurry has reached the initial stiffening degre... | 01/29/1985 |
| 4496509 | Method of producing ceramic tapes A method of preparing green ceramic tapes, comprising adding to 100 parts by weight of a fine ceramic powder, 2 to 15 parts by weight, in terms of its resin content, of a binder mixture consisting of an aqueous polyurethane and a water-soluble acrylic res... | 01/29/1985 |
| 4496503 | Method of making a densified silicon nitride/oxynitride composite A method of making a densified silicon nitride/oxynitride composite is disclosed. The method comprises: (a) shaping a substantially homogeneous powder mixture of silicon nitride, 6-18% yttrium silicon oxynitride of the Y10 Si6 O... | 01/29/1985 |
| 4495116 | Polycrystalline translucent alumina sintered body, a method for producing the same and a high pressure vapor discharge lamp obtained by using said sintered body A polycrystalline translucent alumina sintered body having high in-line transmission, which is suitable for an envelope for a high pressure vapor discharge lamp, is produced by adding to alumina powder having a purity of more than 99.8% MgO or a compound ... | 01/22/1985 |
| 4495118 | Ceramic plates and method for the production thereof Large and thin ceramic plates of, particularly at least 30×30 cm in size and not greater than 20 mm especially not greater than 8 mm in thickness and having oriented crystals are produced by a method comprising drawing a green body from an extruder in a ... | 01/22/1985 |
| 4495121 | Process for producing inorganic fiber A new process for producing an inorganic fiber of superior tensile strength and modulus of elasticity, which comprises spinning a spinning solution in organic solvent of polymetaloxane of good spinnability to form a precursor fiber, calcining said precurs... | 01/22/1985 |
| 4495123 | Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for their manufacture by isostatic hot pressing 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 ... | 01/22/1985 |
| 4493805 | Method and oven for manufacturing a light construction element, particularly a cover plate The method of moldless manufacturing light construction elements comprises a first step of mold-free shaping a blank comprising a first layer of an expandable first clay material and a second layer of a non-expandable second clay material. The blanks are ... | 01/15/1985 |
| 4492358 | Truss shoring system and apparatus therefor The invention relates to a truss shoring method and an apparatus therefor utilized in the pouring of concrete floors and includes a plurality of unitary members adapted to provide vertically adjustable and horizontally movable primary modular units servin... | 01/08/1985 |
| 4490319 | Rapid rate sintering of ceramics High-strength, fine-grain multi-phase substantially crystalline sintered ceramic bodies are produced by a process comprising the steps of cold pressing, followed by sintering at a high temperature, the temperature increase to maximum sintering temperature... | 12/25/1984 |
| 4490318 | Semiconductive ceramic materials with a voltage-dependent nonlinear resistance, and process for preparation Semiconductive ceramic materials suitable for use in varistors, consisting essentially of a major proportion of Sr(1-x)Cax TiO3, where x is from about 0.01 to about 0.50, the balance being at least one of Nb2 O | 12/25/1984 |
| 4489024 | Method of and apparatus for the manufacture of prefabricated prestressed concrete members Prefabricated prestressed concrete members are formed on a stressing bed with a number of working stations arranged next to one another along the length of the bed. A frame froms the working stations and the frame is movable over the stressing bed. With a... | 12/18/1984 |
| 4489032 | Method of hot pressing reactive materials A method is disclosed for hot pressing agglomerated materials in a pressing assembly having walls which can be reactive with the material to be pressed under the environmental, temperature, and pressure conditions to be experienced by the material at the ... | 12/18/1984 |
| 4487734 | Method for the preparation of a high density sintered body of silicon carbide A sintered body of silicon carbide having an outstandingly high density is readily obtained by sintering a shaped form of a powdery blend composed of a silicon carbide powder, an aluminum borate as a sintering aid and a carbonizable organic compound mixed... | 12/11/1984 |
