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| Number | Title | Issue Date |
| 7445745 | Method for fabricating ceramic articles A method for fabricating a ceramic article which includes providing a batch comprising components of (i) a mixture of inorganic raw materials comprising talc, alumina, and silica; (ii) a binder comprising a water-soluble organic binder and a fibrous silicate mineral... | 11/04/2008 |
| 7442425 | High porosity honeycomb and method A ceramic honeycomb substrate for use in an automotive catalytic converter system which exhibits improved light-off performance by virtue of a high porosity of 45 to 75% while still maintaining a wall thickness of greater than 2.0 mil (0.0020 inch, 0.0508 mm), prefe... | 10/28/2008 |
| 7422719 | Process for removing oil-based components and forming ceramic bodies An improvement in a process of forming ceramic articles comprising oil-based components or extrusion aids, the improvement including removing the oil-based components after drying and prior to firing by flowing a heated gas through the green ceramic honeycomb articl... | 09/09/2008 |
| 7304013 | Metal oxide catalysts Bulk and supported catalysts are prepared from an aqueous slurry containing a catalytically active material and a binder. The slurry is either coated onto a support and dried to form a porous, high surface area phase containing the catalytically active material, or ... | 12/04/2007 |
| 7247184 | Asymmetric honeycomb wall-flow filter having improved structural strength A honeycomb filter includes an array of interconnecting porous walls which define an array of first channels and second channels. The first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels. The... | 07/24/2007 |
| 7244689 | Method of producing alumina-silica catalyst supports Alumina-silica catalyst supports having substantially high surfaces areas are formed by extrusion, drying and firing of a plasticized batch including an alumina-silica powder component, acid, organic binder and water. The alumina-silica powder component can be forme... | 07/17/2007 |
| 7238319 | Method for fabricating ceramic articles containing organic compounds A method for fabricating a green ceramic article containing organic compounds. The method involves first heating the green ceramic article to sequentially remove the organic compounds such that the organic compound with the lowest weight loss onset temperature is su... | 07/03/2007 |
| 7179316 | Cordierite filters with reduced pressure drop A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein the filter exhibits a... | 02/20/2007 |
| 7141204 | Method of forming ceramic articles An improvement in a method of forming ceramic articles comprising an oil component or extrusion aid, the improvement including removing a substantial portion of the oil component, prior to firing, by applying a solvent to the green ceramic article to dissolve the oi... | 11/28/2006 |
| 7141089 | Magnesium aluminum silicate structures for DPF applications A ceramic filter for trapping and combusting diesel exhaust particulates composed of an end-plugged cordierite honeycomb structure exhibiting a pore size distribution as determined by mercury porosimetry in which the quantity d50/(d50+d90 | 11/28/2006 |
| 7112050 | Extrusion die for making a double-skin honeycomb substrate A honeycomb substrate includes an inner body having an inner skin and an array of inner webs defining an array of inner cells within the inner skin. The honeycomb substrate further includes an outer body having an outer skin formed concentric with the inner skin and... | 09/26/2006 |
| 7097880 | Method for preparing catalysts A method for impregnating porous monolith supports with catalytically active materials is disclosed. The impregnation is carried out at a temperature which substantially reduces chemisorption rates such that reactions between the monolith substrate and catalytically... | 08/29/2006 |
| 7071135 | Ceramic body based on aluminum titanate and including a glass phase A ceramic body comprising a crystal phase of aluminum titanate in an amount of 50 to 95% by weight, and a glass phase in an amount of 5 to 50% by weight. The inventive ceramic body may include a second crystal phase, for example mullite in an amount of up to 40% by ... | 07/04/2006 |
| 7001861 | Aluminum titanate-based ceramic article An aluminum titanate-based ceramic article having a composition comprising u (Al2O3—TiO2)+v (R)+w (3Al2O3—2SiO2)+x (Al2O3)+y (SiO2)+z (1.1SrO-1.5Al2O | 02/21/2006 |
| 6991448 | Apparatus for extruding honeycomb bodies An extrusion apparatus which satisfactorily adjusts differences in skin-body flow rates at multiple locations around the die, and allows for the external manipulation of the interior components controlling batch flow, during the production without having to stop man... | 01/31/2006 |
| RE38888 | Cordierite body A ceramic comprising predominately a cordierite-type phase approximating the stoichiometry Mg2Al4Si5O18 and having a coefficient of thermal expansion (25-800° C.) of greater than 4×10−7/° C. and less than 1... | 11/22/2005 |
| 6942713 | Ceramic body based on aluminum titanate An aluminum titanate-based ceramic body having a composition a formula comprising a(Al2O3.TiO2)+b(CaO.Al2O3.2SiO2)+c(SrO.Al2O3.2SiO2)+d(BaO.Al2O3... | 09/13/2005 |
| 6933255 | Beta-spodumene ceramics for high temperature applications A method of preparing beta-spodumene bodies from a plastic batch comprised entirely of minerals, absent a glass component. The resulting structure has a stoichiometry of 1:1:4 (Li2O:Al2O3:SiO2) to 1:1:11 (Li2O:A... | 08/23/2005 |
| 6919047 | Reduction of nitrogen oxides in diesel exhaust gases and fuel injection system A method for reducing NOx in lean exhaust gases to N2 includes injecting a fuel into the exhaust gases and passing the exhaust gases and fuel mixture through a catalyst to reduce the NOx to N2. The catalyst may be (a) a pe... | 07/19/2005 |
| 6903051 | In situ theta alumina coated monolithic catalyst supports The invention provides a monolithic catalyst support for hydrogenation and hydrotreating and in particular for selective hydrogenation of pyrolysis gasoline. The monolithic catalyst includes (i) a multicellular monolith body, preferably having a honeycomb structure,... | 06/07/2005 |
| 6897182 | Catalyst for purifying exhaust gases A catalyst for purification of exhaust gases including (1) a catalysis-promoting coating comprising a noble metal catalyst and a NOx storage component loaded onto a carrier material, wherein the NOx storage component comprises an alkali metal and, (2) a ceramic subs... | 05/24/2005 |
| 6864198 | Cordierite ceramic body and method A cordierite ceramic body having (i) a pore size distribution and a porosity which satisfy the relationship 10.2474/[(d50)2(pore fraction)]+0.0366183(d90)−0.00040119(d90)2+0.468815(1/pore fraction)2... | 03/08/2005 |
| 6849181 | Mullite-aluminum titanate diesel exhaust filter The invention is directed at a mullite-aluminum titanate porous diesel particulate filter constituting a porous ceramic body containing, expressed in terms of weight percent of the total body, of 60-90%, preferably 70-80%, most preferably 70% iron-aluminum titanate ... | 02/01/2005 |
| 6843822 | Filter with varying cell channels A honeycomb structure which includes an inlet end and an outlet end opposing each other and a plurality of cell channels extending along an axis from the inlet end to the outlet end, the cell channels having non-equal, square cross-sections, and an extrusion die for... | 01/18/2005 |
| 6835689 | NH3 generation catalysts for lean-burn and diesel applications A catalyst for converting NOx in exhaust gases from internal combustion engines to NH3 includes a perovskite material or a metal oxide impregnated with a noble metal, the metal oxide comprising at least one selected from Fe2O3 | 12/28/2004 |
| 6809051 | Fabrication of low thermal expansion calcium aluminate articles Compositions, articles and methods for making such articles are disclosed. The compositions, articles and methods include calcium aluminate materials having a low coefficient of thermal expansion. ... | 10/26/2004 |
| 6809139 | Particulate sealant for filter plug forming A particulate sealant for forming plugs in selected cells of honeycomb structures and consisting essentially, by weight, of about 70 to 90% ceramic blend, the ceramic blend being raw ceramic materials selected to form a composition consisting essentially of in perce... | 10/26/2004 |
| 6803087 | Ceramic honeycomb body and process for manufacture There is provided ceramic honeycomb body including a plurality of parallel cells defined by intersecting internal walls, and arranged in horizontal and vertical rows at and between opposing ends of the honeycomb body, an outer peripheral wall surrounding the cells, ... | 10/12/2004 |
| 6800233 | Extrusion method for ceramic honeycomb articles An improvement in a process of making honeycomb articles, which process utilizes a co-rotating, intermeshing twin screw extrusion apparatus to mix, screen, and extrude a batch of ceramic materials through a die, the improvement which comprises the steps of separatin... | 10/05/2004 |
| 6780805 | Zeolite/alumina catalyst support compositions and method of making the same Zeolite/alumina composite, and a method for making, the composite for use as a catalyst substrate or catalyst carrier and comprising zeolite having a silica/alumina ratio of greater than 300 and gamma alumina having a specific surface area of greater than 100 m... | 08/24/2004 |
| 6773657 | Method for making cordierite honeycomb A sintered ceramic that exhibits an average linear coefficient of thermal expansion (25-800° C.) below about 5.0×10−7° C.−1, a total porosity between the range of 20% to about 30%. Furthermore, the sintered ceramic article exhibits a por... | 08/10/2004 |
| 6770111 | Pollucite-based ceramic with low CTE A ceramic structure which is pollucite-based and has high refractoriness and high resistance to thermal shock. The inventive structure is suitable in high temperature applications such as a filtering particulates from diesel engine exhaust. ... | 08/03/2004 |
| 6736875 | Composite cordierite filters Composite cordierite honeycomb structures especially suitable for diesel exhaust filtration applications comprise a non-oxide polycrystalline phase constituting 10-70% by weight, with the remainder of the ceramic material constituting a cordierite phase, the non-oxi... | 05/18/2004 |
| 6729190 | Ceramic honeycomb strength testing apparatus Methods and apparatus for testing the strength of ceramic honeycomb structures are described. The apparatus includes a chamber that utilizes a flexible, generally cylindrical member including integral flanges to apply compressive force to the periphery of the honeyc... | 05/04/2004 |
| 6699429 | Method of making silicon nitride-bonded silicon carbide honeycomb filters A process for forming a silicon nitride-bonded silicon carbide honeycomb monolith by a) forming a plasticizable mixture which includes (1) about 60% to 85% by weight, powdered silicon carbide with a median particle size of about 10-40 micrometers; (2) abo... | 03/02/2004 |
| 6696132 | Honeycomb with varying channel size and die for manufacturing A honeycomb structure which includes an inlet end and an outlet end opposing each other and a plurality of cell channels extending along an axis from the inlet end to the outlet end, the cell channels having non-equal, square cross-sections, and an extrus... | 02/24/2004 |
| 6677272 | Material for NOx trap support A ceramic support element for a NOx trap which includes a NOx storage component comprising an alkali metal, the ceramic support having a composition lying within a ternary system selected from the group consisting of Al2 TiO5 --MgTi | 01/13/2004 |
| 6673414 | Diesel particulate filters A ceramic filter for trapping and combusting diesel exhaust particulates offering improved configurations that are significantly more resistant to thermal cracking and melting damage comprises a honeycomb filter body composed of porous ceramic material an... | 01/06/2004 |
| 6673300 | Method for plugging selected cells in a honeycomb A method for plugging selected cell channels in a honeycomb structure for the fabrication of a solid particulate filter. The method includes covering a first end face of the honeycomb structure with a mask having openings corresponding to open ends of a f... | 01/06/2004 |
| 6666070 | Method for testing the integrity of DPFs A method for inspecting the integrity of diesel exhaust filter by introducing air under pressure through one end of the structure and detecting the presence of air flow at an opposing end surface. The diesel exhaust filter is tested green.... | 12/23/2003 |
