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| Number | Title | Issue Date |
| 5141638 | Beer filtrating apparatus A filtrating apparatus is disclosed in which a filter unit and a washing unit for effecting a fluid washing are unified into one system. A plurality of filter elements of main filters provided in the filter unit are made of sintered material containing me... | 08/25/1992 |
| 5128107 | Apparatus for making ester An apparatus for producing ester includes an esterification device, a neutralization device connected to the esterification device, a distillation device connected to the neutralization device, a container connected to the distillation device for storing ... | 07/07/1992 |
| 5126047 | Molten metal filter A molten metal filter includes a refractory plate having an opening therethrough. A refractory filter element is attached to the refractory plate and projects therefrom, the exterior surfaces of the filter element generally defining a rectangular prism. T... | 06/30/1992 |
| 5114882 | Filter for aluminum hot melt having a partially crystalline binder A filter for aluminum hot melt comprises alumina aggregate particles and an inorganic binder in an amount of 5 to 20 parts by weight bound to 100 parts by weight of said alumina aggregate particles. The inorganic binder is composed to 15 wt % to 80 wt % o... | 05/19/1992 |
| 5114581 | Back-flushable filtration device and method of forming and using same A back-flushable filtration device is provided. The device includes a monolith of porous material having an inlet end and an outlet end. The passageways of the monolith are plugged at the inlet and outlet ends of the monolith, thereby preventing direct pa... | 05/19/1992 |
| 5114447 | Ultra-high efficiency porous metal filter An ultra-high efficiency particulate air filter for use in the microelectronics manufacturing industry is formed as a fully homogeneous sintered metal filter that exhibits an efficiency substantially in excess of a 6 log reduction and preferably equal to ... | 05/19/1992 |
| 5110470 | Ceramic filter and process for making it A ceramic filter having good permeability and a superior durability, and a process for manufacturing the same. This filter comprises a porous support made of a ceramic, a fine intermediate layer formed on one surface of said support and comprised of at le... | 05/05/1992 |
| 5108618 | Method of and apparatus for modifying fuel A filter device for filtering hydrocarbon fuel, such as gasoline, includes a filter device having a ceramic material which can activate water. The hydrocarbon fuel which is passed through the ceramic material can be activated by the ceramic material. The ... | 04/28/1992 |
| 5104539 | Metal oxide porous ceramic membranes with small pore sizes A method is disclosed for the production of metal oxide ceramic membranes of very small pore size. The process is particularly useful in the creation of titanium and other transition metal oxide membranes. The method utilizes a sol-gel process in which th... | 04/14/1992 |
| 5104540 | Coated molten metal filters A molten metal filter is disclosed having a carbon or carbon-thermite coating that reduces thermal shock to the filter, and protects the filter from corrosion from the metal or components and impurities in the metal, and prevents metal from freezing in th... | 04/14/1992 |
| 5102542 | Construction of canister-type filters Compound filters using two different filter element types are disclosed. When a carbon element is used it is of the concentric type having a central cavity. Filter elements for filtering very fine particles are used in addition. Various types of such elem... | 04/07/1992 |
| 5100551 | Segmented filter disc with slotted support and drainage plate A filter segment disc of a segment filter comprises a support and drainage plate with slots radiating from the filter hub toward the filter edge. The slots are configured to provide a substantially uniform fluid flow over the filtering medium of the filte... | 03/31/1992 |
| 5098571 | Ceramic filter and process for making it A process for manufacturing a ceramic filter having a given pore size required as a filter membrane and also having superior alkali resistance and acid resistance. The filter of the present invention is produced by preparing an aggregate comprising alumin... | 03/24/1992 |
| 5098583 | Method for producing high solids slurries of clay water products In the process for beneficiating a crude kaolin by the method which includes a wet classification step to provide a classified kaolin fraction having a PSD such that at least 50% by weight thereof are of less than 1/2μm ESD and substantially 100% by weig... | 03/24/1992 |
| 5093289 | Ceramic material permitting the passage of fluids and based on silicon powder reaction-bonded in the presence of carbon A ceramic material made of a skeleton reaction-bonded silicon powder is distinguished by an open-cell pore structure produced by using a matrix of an appropriately shaped polyurethane foam structure. For the preparation, a foam matrix is coated with a sus... | 03/03/1992 |
| 5088554 | Sintered metal sand screen A tubular sand screen is made in one piece entirely of powdered metal slivers which are molded and sintered to form a metallurgically integral rigid tubular structure. Aggregate metal particles, for example, stainless steel slivers, are bonded together by... | 02/18/1992 |
| 5089134 | Silica glass filter A silica glass filter comprises a porous support body composed of amorphous silica particles as a porous sintered body and having a purity of 99.9% or more and containing 150 ppm or less in total of impurities including alkali, alkali metal, heavy metal a... | 02/18/1992 |
| 5087277 | High temperature ceramic particulate filter A high temperature ceramic filter is produced from a composition containing efractory cement, aggregate, pore forming additives, and sintering agents. The pore forming additives are synthetic or organic powders or fibers which sublimate, melt, or otherwise... | 02/11/1992 |
| 5085773 | Anti-static fuel filter A fuel filter for the fueling system of a motor vehicle has a non-conductive housing defining a chamber in which porous sintered plastic discs are mounted transversely across the chamber defined by the housing. The discs are of graduated porosity, and ten... | 02/04/1992 |
| 5075160 | Ceramic fiber reinforced filter A filter for removing particulate matter from high temperature flowing fluids, and in particular gases, that is reinforced with ceramic fibers. The filter has a ceramic base fiber material in the form of a fabric, felt, paper of the like, with the refract... | 12/24/1991 |
| 5069794 | Separation of mixture components over membrane composed of a pure molecular sieve A process is provided for separation of components of a gaseous or liquid mixture which comprises contacting the mixture with a synthetic, non-composited microporous membrane comprising a continuous array of crystalline molecular sieve material.... | 12/03/1991 |
| 5064541 | Devices and methods for the collection of a predetermined volume of plasma or serum A device and method for permitting the separation of plasma or serum from whole blood. The device comprises a matrix of hydrophilic sintered porous material to which at least one red blood cell agglutinating agent has been applied. According to a first me... | 11/12/1991 |
| 5064542 | Method for filtering a whole blood sample using an in-line fluid filter for an automated analyzer A method for filtering a whole blood sample using a filter element constructed and arranged to block the passage of fibrous and particulate matter which may be present in a liquid sample, such as a whole blood sample, while allowing the blood cells to pas... | 11/12/1991 |
| 5064534 | Filter for the purification of tap water A filter for the purification of tap water containing several layers of different filter materials. One of the layers is an adsorption filter element comprising a self-supporting sintered body of finely dispersed adsortion material, e.g., activated charco... | 11/12/1991 |
| 5059366 | Method of making a membrane filter The fiter membrane comprises a porous structure made of a material selected from sintered ceramics, sintered metals, microporous carbon, and microporous glass, and is characterized by the fact that its entire external surface, including the inside surface... | 10/22/1991 |
| 5045511 | Ceramic bodies formed from yttria stabilized zirconia-alumina Ceramic bodies suitable for use in the filtration of molten metal are formed by immersing a porous organic substrate material in an aqueous thixotropic slurry containing yttria, zirconia and alumina; expelling excess slurry; drying the impregnated materia... | 09/03/1991 |
| 5039340 | Ceramic foam and a process for forming the same The present invention relates to a ceramic foam material, preferably a ceramic foam filter, prepared by providing an open cell flexible foam having a plurality of interconnected voids surrounded by a web of the flexible foam, applying an adhesion promotin... | 08/13/1991 |
| 5037543 | Assemblage of hydroxyl apatite particles and liquid chromatography column using the same An assemblage of hydroxyl apatite particles having small and uniform particle size. The median of the particle size is 1 to 10 μm, and at least 90% of the particles in the assemblage have a particle size of not more than 25 μm. The assemblage can be use... | 08/06/1991 |
| 5033531 | Casting of molten iron and filters for use therein Molten iron is cast into a mould through a filter located in the runner system of the mould using a filter comprising a body having a plurality of cells, at least some of the cells having their walls at least partially coated with a first layer of wax and... | 07/23/1991 |
| 5030351 | Process for the preparation of a binary membrane top layer Preparation of binary membrane ultrafiltration (UF) toplayers (Al2 O3 -CeO2 and Alhd 2O3 -TiO2) to make chemically stable UF membranes and/or or catalytically active membranes. Two stable sols are pre... | 07/09/1991 |
| 5028036 | Filter for molten ferrous metal The filtration of molten ferrous metal is accomplished by providing a porous ceramic filter preferably comprising particles of alumina and partially stabilized zirconia that are spaced by interconnected cells to form circuitous and tortuous pathways throu... | 07/02/1991 |
| 5022991 | Thermite coated filter Thermite coatings are applied to molten metal filters and the environs, to produce longer lived filters that can be utilized in harsher environments. The coatings employ exothermic, redox, and combination reactions to produce the beneficial effects.... | 06/11/1991 |
| 5021157 | Filtration, drainage, and drying apparatus for deliquification of sludges An improved continuous, smooth, porous, rigid surface is supported by an array of shaped, porous, support blocks mounted on an impervious planar foundation and surrounded by bi-functional containment walls to form a gravity filtration and drainage apparat... | 06/04/1991 |
| 5017287 | Dual cup-shaped supporting filter body Filtering element for corrosive liquids to be filtered under pressure, which displays only minimal filtrate loss when the filter is changed, consisting of a pressure-resistant, cup-shaped outer supporting body (2) and a coaxial, also cup-shaped, pressure-... | 05/21/1991 |
| 5013459 | Opthalmic fluid dispensing method A method and device for dispensing an aqueous fluid which is desired to be maintained in a sterile condition. The method includes storing a quantity of aqueous fluid such as ophthalmic saline solution in a reservoir within a portable container having an o... | 05/07/1991 |
| 5011603 | Ceramic filter A ceramic filter comprising a support layer having an inner surface for forming at least one filter passage, and a filter layer coated on the inner surface of the support layer and having an inner surface functioning as a filter surface, the filter layer ... | 04/30/1991 |
| 5009971 | Gas recombinant separator Described is a porous flexible sheet of about 93 to 99.5 weight percent amorphous precipitated silica and from about 0.5 to about 7 weight percent fibrillated, unsintered polymeric material, e.g., polytetrafluoroethylene. The sheet is useful as a separato... | 04/23/1991 |
| 5006248 | Metal oxide porous ceramic membranes with small pore sizes A method is disclosed for the production of metal oxide ceramic membranes of very small pore size. The process is particularly useful in the creation of titanium and other transition metal oxide membranes. The method utilizes a sol-gel process in which th... | 04/09/1991 |
| 5004545 | Ceramic foam filter apparatus A filter for use in the filtration of molten metals comprises a ceramic foam having a gasket made from fibrous material surrounding its peripheral surface and a metallic foil, such as aluminum foil, fixed to the gasket, for example by means of an adhesive... | 04/02/1991 |
| 4999101 | Preheat indicator The present invention relates to a ceramic body suitable for use in molten metal filtration applications having a built-in preheat indicator and method for forming such a ceramic body. The preheat indicator comprises a dye having a burnoff temperature sub... | 03/12/1991 |
