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| Number | Title | Issue Date |
| 7410605 | Solution film-forming method The solution film-forming method is provided in which the absolute filtration accuracy for a cellulose acylat solution can be improved and filtration throughput can be increased without reducing the pore size of a filtering material. A dope stock solution to be filt... | 08/12/2008 |
| 7381323 | Filtration apparatus A filtration apparatus is provided which is easy to maintain, manage and which enables preservation of filtration characteristics due to the fact that filtration is carried out by use of a gelatinous filter apparatus. In the filtration apparatus, filtration characte... | 06/03/2008 |
| 7303683 | Microorganism-removing filter medium having high isoelectric material and low melt index binder A filter medium capable of removing microorganisms from a fluid such as water. The filter medium includes particles of activated carbon, particles of a substantially insoluble inorganic material having an isoelectric point greater than the fluid being filtered. A lo... | 12/04/2007 |
| 7249472 | Device for treating textile or similar in a continuous stream The invention relates to a device for treating web-type textiles, nonwovens or paper in a continuous stream, uses a gaseous treatment agent that circulates in the device. The product lies on the exterior face of a permeable drum (5), which is subjected to an ... | 07/31/2007 |
| 7147728 | Magnesium alloy producing negative potential A type of magnesium alloy that is capable of producing negative potential, characterized in that it contains 8 wt %˜9.1 wt % of aluminum (Al), 0.1 wt %˜1.0 wt % of zinc (Zn), 0.1 wt %˜1.0 wt % of manganese (Mn), 0.05 wt % or less of silicone (Si), 0.002 or less o... | 12/12/2006 |
| 7074338 | Filtering method and filtering device Using the filter auxiliary agent separated by backwashing from a filter element repeatedly and effectively, the consumption amount of a filter auxiliary agent and the generation of industrial waste can be suppressed. In a filter auxiliary agent pre-coat circuit, a f... | 07/11/2006 |
| 7029579 | System for solid-liquid separation A system for use in filtering a slurry using air pressure to squeeze the slurry material and dewatering it. The system including a source of slurry, a chamber, a filter belt that passes through the chamber, a manifold inlet supplying the slurry to a first side of th... | 04/18/2006 |
| 7025493 | Chemical supply system and chemical mixing apparatus A chemical supply system includes at least two supply pipes for supplying at least two different chemicals; a mixing unit connected to the supply pipes for mixing at least two different chemicals to form a chemical mixture, an exhausting unit for exhausing the chemi... | 04/11/2006 |
| 7018547 | Filtration covering apparatus A filtration covering apparatus for use covering diatomaceous earth filter grids for swimming pools. The filtration covering apparatus has a replaceable cover having two closed sides, a bottom opening, and a top opening. The replaceable cover is curved shaped to acc... | 03/28/2006 |
| 7001528 | Use of aqueous binders in producing filter materials The use of an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 obtainable by free-radical emulsion polymerization in the presence of a polymer A2 synthesized from from 50 to 99.5% by weight of at... | 02/21/2006 |
| 6962660 | Fluid filter system with secondary flow path for augmented filtration A filter system for spas and swimming pools is disclosed having a primary filter containing a porous membrane made of multiple plies. A fluid purifying medium in the form of irregularly shaped copper and zinc alloy particles is captured between the plies and placed ... | 11/08/2005 |
| 6929754 | Solid/liquid separation system for multiphase converters Methods and apparatus for removing wax products from a slurry used in a Fischer-Tropsch reactor. The preferred embodiments of the present invention are characterized by a solid/liquid separation system that removes liquid products from a slurry by drawing the fluid ... | 08/16/2005 |
| 6833077 | Sequential swinging precoat removal and renewal system, filter so equipped and method A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of t... | 12/21/2004 |
| 6830679 | Filtration device A filtration device is provided in which wastewater, in the form of a colloidal solution containing microparticles, is guided to tank, circulated, and filtrated using a second filter. The device includes a gel film that is formed by suction on the surface of a first... | 12/14/2004 |
| 6800197 | Continuously operable rotating drum pressure differential filter, method and systems A rotating drum pressure differential filter is provided whereby a layer of filter medium is continuously refreshed by a spray applicator device after the layer is utilized to filter components sample medium and a portion of the layer is subsequently scraped to remo... | 10/05/2004 |
| 6733680 | Use of particulate polymers as filter aids for aqueous liquids The description is given of the use of particulate water-insoluble polymer preparations comprising at least one polymer P that is essentially made up of hydrophilic polymer segments and hydrophobic polymer segments as filter aids for filtering aqueous liquids. ... | 05/11/2004 |
| 6673447 | Cationically charged coating on hydrophobic polymer fibers with poly (vinyl alcohol) assist A hydrophobic polymer fiber having a cationically charged coating thereon, in which the coating includes a functionalized cationic polymer, such as an epichlorohydrin-functionalized polyamine or an epichlorohydrin-functionalized polyamido-amine, which has... | 01/06/2004 |
| 6589430 | Controlling the supply of bodyfeed to a filter The invention features a control system for controlling the supply of bodyfeed to a filter for removing solids from a beer stream is described. By applying the bodyfeed at an appropriate rate and hence achieving appropriate effective bed voidage it is pos... | 07/08/2003 |
| 6585901 | Method of draining water from low-consistency water-fiber suspensions A method of draining water from low-consistency water-fiber suspensions, in which the water-fiber suspension is fed to a filtering surface comprising holes. The rougher fibers are first separated from the water-fiber suspension and fed to the filtering su... | 07/01/2003 |
| 6562245 | Crushed foam glass filter aid and method of use Disclosed is filter aid formed of a crushed foam glass utilized as a filtering aid for removing suspended materials in a fluid stream by first providing a permeable support with the crushed foam glass filter aid placed adjacent thereto, and directing the ... | 05/13/2003 |
| 6555014 | Method for filtering a liquid by the addition of a filtering aid A method for filtering a liquid and an apparatus for carrying out the method in which at least one container is provided from which a filtering aid is fed to a dosing device by a delivery device, and the filter aid is supplied to an injecting container an... | 04/29/2003 |
| 6537449 | Liquid filter using filtration aid A liquid filter is provided of the type having a filter container with an inlet through the side of the container towards the lower end thereof, an outlet from the container, and a filter medium interposed between the inlet and outlet. The filter is adapt... | 03/25/2003 |
| 6511604 | Method of treating a liquid material and treatment facilities The present invention relates to the techniques of treating a liquid material to be treated, which enables efficient fractional removal of toxic materials such as PCB in a liquid mixture. The treatment method of the invention comprises the step of permitt... | 01/28/2003 |
| 6406622 | Apparatus for filtering a fluid According to the apparatus, removables 12 trapped by a first filter film 10 are used as a second filter film 13, and clogging of the first filter film 10 is prevented, and an external force such as bubbles is applied to the second filter film 13 to mainta... | 06/18/2002 |
| 6383377 | Filtering apparatus and open/close valve for the filtering apparatus A filtering apparatus including a filtering vessel, wherein a precoat filtering layer is formed with a filter aid on a filtering bed between a nonfiltered liquid chamber where a nonfiltered liquid to be filtered is introduced and a filtered liquid chamber... | 05/07/2002 |
| 6332977 | Apparatus for steam sterilizing and recycling leaf-filter aids Steaming filter aid cakes in-place in a pressure leaf filter is a simple, inexpensive, and reliable technique for insuring that all collected pathogens are destroyed and never released back into the environment. Filter aids including diatomaceous earth re... | 12/25/2001 |
| 6270671 | Method and apparatus for microfiltration A method and apparatus for microfiltration useful in softening water as well as in removing other dissolved constituents where the method comprises passing water that contains a precipitate through a semipermeable tubular membrane. Filtrate is received fr... | 08/07/2001 |
| 6254825 | Antifoam compositions including lecithin and uses thereof A composition including lecithin which is useful for defoaming liquids, such as blood. In one aspect of the invention the composition includes inorganic particles. In another aspect of the invention the composition includes a silicone.... | 07/03/2001 |
| 6244929 | Chemical-mechanical-polishing system with continuous filtration A chemical-mechanical-polishing system having a slurry distribution system, a polisher, a deionized water supply, and a drain, includes a slurry filtration system. The filtration system has two filters for alternately filtering particles in slurry and bei... | 06/12/2001 |
| 6238575 | Antimicrobial treatment of enclosed systems having continuous or intermittent fluid flow An enclosed fluid system that is resistant to the formation of biofilm at any and all points of contact between system components and the fluid stored or transported therethrough. The enclosed fluid system includes a point of fluid entry, such as a pump f... | 05/29/2001 |
| 6165048 | Chemical-mechanical-polishing system with continuous filtration A chemical-mechanical-polishing system having a slurry distribution system, a polisher, a deionized water supply, and a drain, includes a slurry filtration system. The filtration system has two filters for alternately filtering particles in slurry and bei... | 12/26/2000 |
| 6117459 | Filtration adjuvants, filtration supports, filtration process using them and process for regenerating said adjuvants The invention relates to new regenerable filtration adjuvants which are usable for the filtration of liquids, particularly beer at the end of the secondary fermentation storage, characterized in that they comprise synthetic or natural incompressible polym... | 09/12/2000 |
| 5908561 | Purified natural glass product This invention relates to purified natural glass products having low concentrations of soluble substances. More particularly, this invention relates to purified natural glass products having low slurry electrical conductivities (i.e., less than about 18 Î... | 06/01/1999 |
| 5902482 | Back-flushable filter cartridge and method of back-flushing same A back-flushable filter cartridge includes a cylindrical exterior fluid-permeable filter media cage, a cylindrical interior fluid-permeable core element coaxially disposed within the filter media cage so as to establish therebetween an interior space, and... | 05/11/1999 |
| 5882528 | Method for extending useful life of filter aid in a filter with hydraulically deformable system A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering fluid entering the fluid inlets, the fluid passing through the... | 03/16/1999 |
| 5879560 | Back-flushable filter cartridge and method of back-flushing same A back-flushable filter cartridge includes a cylindrical exterior fluid-permeable filter media cage, a cylindrical interior fluid-permeable core element coaxially disposed within the filter media cage so as to establish therebetween an interior space, and... | 03/09/1999 |
| 5871641 | Fluid filter with pleated septum A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), ... | 02/16/1999 |
| 5772867 | Fluid filtering machine with filtering membrane controlled by PLC A fluid filtering machine is provided with a filtering membrane made up of filtering substance that collects on a filtering core in a filtering tank and is controlled by a programmable logic controller. The machine includes a raw water tank, a purified wa... | 06/30/1998 |
| 5653889 | Process for filtering polyamide oligomers from aqueous streams containing the same A filter element surface is coated with particulate polyamide which serves as a filter aid to trap polyamide oligomers suspended in water. The particulate polyamide is preferably coated onto a surface of a bag filter so that polyamide oligomers flowing th... | 08/05/1997 |
| 5632891 | Self venting septums for use in a liquid filtration system A septum adapted to be pre-coated with a filter and/or chemical treatment composition is formed of a tubular core member having a top and a bottom end. A plurality of top openings is provided in the core member immediately adjacent to the top end. A short... | 05/27/1997 |
