Bizarre Patents
Nicotine Containing Dental Floss
Keep away cavities and cancer at the same time.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5208192 | Preceramic polysilazane compositions A crosslinkable composition suitable for use as an infiltrant or as a binder for ceramic powders, such as silicon carbide and/or silicon nitride, in a formulation intended to be injection molded or extruded comprises about 40-70% by weight of a low molecu... | 05/04/1993 |
| 5206191 | Method of producing refractory materials and their applications in the casting of corrosive alloys A method of producing a refractory material of the non-shaped type is disclosed. Refractory aggregates and a binder are mixed ensuring cohesion by chemical bonding. The mixture is shaped and fired. A charge comprising refractory particles of a polymodal g... | 04/27/1993 |
| 5205970 | Method of infiltration forming a silicon carbide body with improved surface finish A method of infiltration forming silicon carbide bodies having an improved surface finish comprises, infiltrating a porous carbonaceous preform with molten infiltrant to form a silicon carbide body. The body is heated in an inert atmosphere or vacuum to a... | 04/27/1993 |
| 5198152 | Preceramic compositions and ceramic products with an unsaturated organic or organosilicon compound A crosslinkable preceramic composition suitable for use as an infiltrant for porous ceramics, such as fiber-reinforced ceramic composites, comprises about 75-99% by weight of a low molecular weight polysilazane and about 1-25% by weight of an unsaturated ... | 03/30/1993 |
| 5196271 | Method of making ceramic articles having channels therein and articles made thereby A method is provided for producing a self-supporting ceramic body comprising a polycrystalline material comprised of the oxidation reaction product of a parent metal and having therein one or more channels which inversely replicate the geometry of a confi... | 03/23/1993 |
| 5196386 | Sintered ceramic composite body and method of manufacturing same A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or ... | 03/23/1993 |
| 5196120 | Ceramic-ceramic composite filter A ceramic fiber-ceramic composite filter having a support composed of ceramic fibers, preferably texturized, a carbonaceous layer thereover, and a silicon carbide coating over the carbonaceous layer and coated on substantially all of the fibers. A strong,... | 03/23/1993 |
| 5194408 | Sintered ceramic microwave heating susceptor Improved ceramic compositions are provided that are useful in the formulation of microwave susceptors as well as the susceptor articles fabricated therefrom. The novel compositions include a binder and a microwave absorbing material of compounds selected ... | 03/16/1993 |
| 5192719 | Method of producing high-strength ଲ-type silicon carbide sintered bodies A high-density and high-strength ଲ-type silicon carbide sintered body, in which crystal grains are made uniform and fine by adjusting the compounding ratio of the sintering aid and further taking a special means at the sintering step while suppressi... | 03/09/1993 |
| 5190737 | High yield manufacturing process for silicon carbide A process for preparing silicon carbide by carbothermal reduction which includes transporting, in a gaseous medium, a particulate reactive mixture of a silica source and a carbon source through a reaction zone. The heating rate of the atmosphere within th... | 03/02/1993 |
| 5189273 | Microwave absorbing heater A microwave absorbing heater comprising a porous body containing silicon oxide and having a porosity of 40 to 95%. A microwave absorbing heater may be formed of a porous body having a porosity of 40 to 95% and composed of an inorganic electrical insulating ... | 02/23/1993 |
| 5180696 | High-toughness ZrO2 sintered body and method of producing same A high-toughness ZrO2 sintered body having a stress-induced transformation ratio of 25% or more, which consists essentially of 40-90 volume % of ZrO2 containing 0.1-3 mol % of Nd2 O3 and 0.5-3.5 mol % of Y2... | 01/19/1993 |
| 5179048 | Preceramic compositions and ceramic products Preceramic polymer dispersions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0-3 parts by weight of alu... | 01/12/1993 |
| 5179049 | Heat treating apparatuses for semiconductors and high purity silicon carbide parts for the apparatuses and a method of making thereof High purity silicon carbide parts for a heat treating apparatuses for semiconductors; composed mainly of -type silicon carbide and silicon; characterized in that a particle sizes of the -type silicon carbide crystals composing the high purit... | 01/12/1993 |
| 5173283 | Platelets for producing silicon carbide platelets and the platelets so-produced A process for producing silicon carbide platelets having a size of 20 μm or less, and the platelets so produced. The process comprises reacting particles of a non-graphitizable form of hard carbon containing 0.5-1.5% by weight of aluminum and at least 0.... | 12/22/1992 |
| 5171722 | SiC fibers having low oxygen content and methods of preparation A method of preparing preceramic SiC fibers having a very low oxygen content by forming fibers from a solution of a polycarbosilane and a vinylic SiC precursor in a mutual volatile solvent, heating fibers in an oxygen-free inert atmosphere to effect a cro... | 12/15/1992 |
| 5169808 | Metal carbide production from carboxylate precursors Metal carbides can be formed by the pyrolysis of a composition comprising metal and carboxylic acid residues bonded therein, the composition being substantially free of extraneous carbon and also having metal moieties that are not in the substituent posit... | 12/08/1992 |
| 5169440 | Silicon carbide membrane for X-ray lithography and method for the preparation thereof A silicon carbide membrane suitable as a masking material in X-ray lithography is provided, which is free from the defects in the prior art products prepared by the chemical vapor deposition method such as pinholes and instability against irradiation with... | 12/08/1992 |
| 5166001 | Ceramic coatings Preceramic compositions which are useful in providing protective ceramic coatings on carbon/carbon composites, graphite, and other carbonaceous materials are prepared by dispersing about 0.4-1.5 parts by weight of silicon carbide, silicon nitride, or a mi... | 11/24/1992 |
| 5162269 | Polycrystalline silicon carbide fibers This invention relates to the preparation of thermally stable, substantially polycrystalline silicon carbide ceramic fibers derived from a polycarbosilane resin. The unexpected thermal stability of these fibers is achieved by the incorporation of boron pr... | 11/10/1992 |
| 5156912 | Multi-layer coatings for reinforcements in high temperature composites The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having a coating of at least three layers, wherein the layers are alternately A-material layers of the general formula: Alx Oy Nz w... | 10/20/1992 |
| 5145812 | Molded articles formed of silicon nitride based ceramic and process for producing same A molded body formed of a silicon nitride-based ceramic containing Si and N and optionally O, C and/or a metal. The ceramic is formed from a polysilazane. A molded body may be a composite body which is composed of a matrix of the ceramic and a reinforcing... | 09/08/1992 |
| 5143540 | Densification of ceramic-metal composites Substantially dense, void-free ceramic-metal composites are prepared from components characterized by chemical incompatibility and non-wetting behavior. The composites have a final chemistry similar to the starting chemistry and microstructures characteri... | 09/01/1992 |
| 5139871 | Thermochemically treated oligomeric and/or polymeric derived silicon carbide fibers Silicon carbide fibers which are derived from oligomeric and/or polymeric precursors are modified and strengthened in annealing the silicon carbide fiber at temperatures in excess of 800° C. under a nitrogen atmosphere in the presence of carbon particles... | 08/18/1992 |
| 5139720 | Method of producing sintered ceramic material In a method of manufacturing a sintered ceramic material using the heat generated in a thermit reaction as a heating source, a pre-heating is applied preceding to the sintering step or a mixture comprising: (A) at least one ceramic powder, (B) at least on... | 08/18/1992 |
| 5135893 | Carbonaceous ceramic composite for use in contact with molten nonferrous metal This invention provides a carbon-containing ceramic composite for molten non-ferrous metal, the composite being a sintered ceramic body to be used in contact with molten non-ferrous metal, the sintered body containing an aggregate of silicon carbide and/o... | 08/04/1992 |
| 5134097 | Silicon nitride-silicon carbide composite material and process for production thereof A sintered silicon nitride-silicon carbide composite material is provided comprising a matrix phase of silicon nitride and silicon carbide where silicon carbide grains having an average diameter of not more than 1 μm are present at grain boundaries of si... | 07/28/1992 |
| 5132255 | Plastic compositions of inorganic powders and sintered bodies of the same An aqueous plastic composition of an inorganic powder which per se has substantially no plasticity which comprises: the inorganic powder and a polysaccharide of natural origin. The molding and sintering of the plastic composition provide a sintered body o... | 07/21/1992 |
| 5132155 | Fibrous material-containing composite A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of fibrous material between at least two of the tapes to form a layered structure, laminating the lay... | 07/21/1992 |
| 5132169 | Composite materials having multidirectional reinforcement textures made essentially of ceramic fibers having a silicon compound base In order to obtain a reinforcement texture made essentially of silicon compound based ceramic fibers in the production of a composite material, the fibers are spun from a ceramic presursor in the molten state, after which they are submitted to a partial c... | 07/21/1992 |
| 5132178 | Ceramic matrix composites exhibiting high interlaminar shear strength Fiber-reinforced ceramic matrix composites incorporating a glass-ceramic matrix of lithium aluminosilicate composition in which is disposed a fiber reinforcement phase including at least one layer of unidirectionally oriented fibers (e.g. SiC), the matrix... | 07/21/1992 |
| 5130277 | Ceramic composite material and process of manufacturing thereof A MgO/SiC composite material in which SiC particles with nano-meter order in size are dispersed within MgO matrix grains can be prepared by hot-pressing the mixture of fine MgO and SiC powders. Addition of SiC particles in the range of 5 volume percent to... | 07/14/1992 |
| 5128494 | Hydridosiloxanes as precursors to ceramic products A method is provided for preparing preceramic polymers and silicious ceramic materials which derive therefrom. The preceramic polymers are polysiloxanes which are synthesized by catalytically activating Si-H bonds in a hydridosiloxane starting material an... | 07/07/1992 |
| 5124283 | Hardening of fusible polysilazanes and SiC/Si3 N4 ceramics produced therefrom Essentially infusible/insoluble crosslinked polysilazanes, well adapted for pyrolysis and conversion into silicon carbide and/or silicon nitride ceramic materials, are produced by intimately contacting a fusible and organic solvent soluble polysilazane st... | 06/23/1992 |
| 5114886 | Unique ceramic compound A sliding material made of a sintered silicon carbide having open pores of a three dimensional network structure, the open pores present at a rate of 5 to 40 percent by volume, with the open pores being impregnated with a lubricant, where the lubricant is... | 05/19/1992 |
| 5112779 | High density silicon carbide sintered bodies from borosiloxanes This invention relates to the preparation of highly densified ceramic bodies by the pyrolysis of a mixture comprising a preceramic borosiloxane, silicon carbide powder, a curing agent for the borosiloxane, a crosslinking agent for the borosiloxane and, op... | 05/12/1992 |
| 5110652 | Shaped fiber-reinforced ceramic composite article A ceramic matrix composite article having a varying thickness is fabricated by a process wherein multiple prepreg sheets comprising reinforcing fibers and powdered matrix material are stacked to provide a multi-layer prepreg stack wherein, through each cr... | 05/05/1992 |
| 5110768 | Rapid solid-state synthesis of refractory materials A process for producing a refractory material having the form TBo, e.g. zirconium nitride (ZrN), includes a first step of mixing a first salt having the form TXn, e.g. zirconium tetrachloride (ZrCl4) and a second salt havi... | 05/05/1992 |
| 5108729 | Production of carbide products A method and apparatus are provided for producing a product comprising a carbide compound, such as for example silicon carbide. A reactor is provided which has a chamber defined therein which is divided into a combustion zone and a reaction zone. A combus... | 04/28/1992 |
| 5106789 | Method of making ceramic composites The invention relates to a method for producing ceramic composites obtained by oxidation of a parent metal to form a polycrystalline ceramic material by providing a filler having a coating of a silicon source on at least a portion of the filler different ... | 04/21/1992 |
