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| Number | Title | Issue Date |
| 8172092 | Filter having melt-blown and electrospun fibers A multi-layer filter media including at least one layer of melt-blown fiber filter media and at least one layer of electrospun nanofiber filter media is provided. The multi-layer filter media of the present invention is configured such that the at least one layer of... | 05/08/2012 |
| 7478729 | Fuel-filtering device A fuel-filtering device is disposed inside a fuel tank for filtering a fuel. The fuel-filtering device includes a filter body having a bag shape and a communication hole, and is formed of a plurality of laminated filter layers. The laminated filter layers includes a... | 01/20/2009 |
| 7398887 | Product and method of forming successive layers of face-to-face adjacent media with calculated pore size A filter media product and method of making the same wherein at least two independent filter media thicknesses of differing coarse and fine pore sizes are held in face-to-face relationship with the pore sizes being so calculated that the overall average pore size of... | 07/15/2008 |
| 7347947 | Methods for filtrating and producing polymer solution, and for preparing solvent A cellulose acetate solution is filtrated with a filter medium formed of cellulose fiber. Hydroxyl groups on the filter medium are substituted to other functional groups. An acidic material is added to the cellulose acetate solution, and the filtration is preformed.... | 03/25/2008 |
| 7344580 | Filter unit Converting machines give rise to polluted air which must be removed with the aid of fans and filters. The invention aims at removal of the polluted air in such a way that the servicing interval is greatly extended by the use of a filter unit having a number of part-... | 03/18/2008 |
| 7309418 | Water contaminant indicators A filtering device for a gravity-flow liquid treatment system includes a first filter component that can be either exposed or adjacent to a substantially transparent region in at least a portion of a filter housing. The first filter component is capable of providing... | 12/18/2007 |
| 7280311 | Disk drive including a filter component with coarse and fine sections There is provided a disk drive including a disk drive base, a disk rotatably coupled to the disk drive base, and a spindle motor attached to the disk drive base and configured to support the disk for rotating the disk with respect to the disk drive base. The disk dr... | 10/09/2007 |
| 7247245 | Filtration cartridge and process for filtering a slurry A depth filter design is disclosed which has little if any open void area upstream of the media. Preferably, it also has little if any open void area downstream of the media as well. A preferred embodiment uses layers of stacked, fibrous media with several of the la... | 07/24/2007 |
| 7186231 | Blood component collection method An object is to provide a blood component collection system capable of collecting a desired blood component of high quality. A blood component collection system 1 comprises a centrifugal separator 20 centrifuging blood into a plurality of components, f... | 03/06/2007 |
| 7163334 | Method and apparatus for mixing fibers A method of mixing including providing a slurry (26, 126) having a first fiber (14, 114) into a container (20, 120), introducing an agitation fluid (31, 138) into the slurry to cause a mixing motion (38, 138) within the slurry, and... | 01/16/2007 |
| 7153425 | Process and filter for filtering a slurry The present invention comprises a process for filtering a slurry and a filter cartridge construction for filtering a slurry having a filtration medium formed of a depth filter such as a cylindrical seamless fibrous depth filter comprising a nonwoven fibrous mass, wo... | 12/26/2006 |
| 7137510 | Filter element A filter element in which several layers (2, 3, 5, 7, 8) made of a filtering medium are joined contiguously in the direction of flow with at least one layer (2, 7) made of a filtering medium with a high storage capacity and a low degree of separation b... | 11/21/2006 |
| 7128772 | Filter assembly, process for producing the filter assembly and filter body having the filter assembly A filter assembly through which a fluid can flow and a method for the production thereof are provided. The filter assembly includes at least one covering layer made of an at least partially porous material with at least one boundary region and includes at least one ... | 10/31/2006 |
| 7073670 | High capacity depth filter bag A filter element for hydrocarbon emissions in, e.g., marine diesel engine applications, comprises a wound mat received within a filter bag. An annular end cap is bonded to one end of the wound mat, and is sealed around its periphery to a bag ring at the open end of ... | 07/11/2006 |
| 7051883 | Wetlaid-spunbond laminate membrane support Nonwoven fabric laminates suitable for use as semipermeable membrane supports are provided. The fabric laminates generally include at least two layers: a spunbond layer of continuous filament fibers and a wet-laid layer of discontinuous filaments. The resulting semi... | 05/30/2006 |
| 7008465 | Cleanable high efficiency filter media structure and applications for use An improved cartridge, typically in cylindrical or panel form that can be used in a dry or wet/dry vacuum cleaner. The cartridge is cleanable using a stream of service water, or by rapping on a solid object, or by using a compressed gas stream, but can provide excep... | 03/07/2006 |
| 7000777 | Vibratory separator screens Screen assemblies for a vibratory separator, the screen assemblies in certain aspects having at least two screening members, the at least two screening members connected by sewing material, and methods for making such screen assemblies. ... | 02/21/2006 |
| 6991113 | Nonwoven fabric for filter and filter for engine A nonwoven fabric for a filter excellent in cleaning efficiency and trapped matter retention volume is constructed by two or more different kinds of fibrous layers placed one over the other. The nonwoven fabric has an average pore size from 30 μm inclusive to 60 μ... | 01/31/2006 |
| 6945411 | Biological fluid filter and system A filter for processing a biological fluid is disclosed comprising at least two filter elements wherein the surface of one filter element is substantially non-hydroxylated and has a nitrogen-to-oxygen ratio in the range of from at least 0.01 to less than about 1.00,... | 09/20/2005 |
| 6939466 | Graded particle-size retention filter medium for fluid filtration unit with improved edge seal A fluid filtration unit having two or more filter medium layers and/or zones, at least one of the layers/zones having a different particle retention capability disposed on each side of a non-filtering separator element. The filter medium are presently preferably pos... | 09/06/2005 |
| 6938781 | Three-dimensional non-woven filter A non-woven depth filter cartridge includes a cylindrical mass of essentially continuous melt-blown polymer filaments and an essentially continuous traversing melt-blown polymer filament extending through the mass. The mass has a depth dimension, a longitudinal dime... | 09/06/2005 |
| 6923911 | Method of filtering air through an air passageway The filter system for filtering particulate material from a generally unidirectional fluid stream comprising a first filter removably positioned in the fluid stream and a second filter removably positioned in the fluid stream downstream of the first filter. The firs... | 08/02/2005 |
| 6919026 | Semipermeable membrane support and process of preparation thereof A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable... | 07/19/2005 |
| 6916395 | Process for making three-dimensional non-woven media A method of continuously producing a melt-blown polymer filament mass includes producing a first set of melt-blown polymeric filaments, collecting the first set of filaments on a rotating collection device to form a tubular filament mass having a plurality of layers... | 07/12/2005 |
| 6910589 | Annular pleated filter cartridge for liquid filtration apparatus A pleated filter cartridge for filtering liquids including an annular filter element having a filter material which is a thin non-perforated non-woven material of flash-spun plexifilamentary high-density polyethylene fibrils, the filter material having a pressure dr... | 06/28/2005 |
| 6878275 | Fuel filter arrangement including fibers and method for manufacturing the same A fuel filter arrangement includes a core member and a filter main body. The filter main body includes an inner filter and an outer filter, which is arranged at outside of the inner filter. A pore size of the outer filter is greater than a pore size of the inner fil... | 04/12/2005 |
| 6749753 | Filter of high accuracy Filters having a high accuracy, small pressure loss, and long filtration life compared with conventional filters are provided. The filters are composed of non-woven fibrous agglomerates and are constructed in such a way that at least two layers of a non-woven fibrou... | 06/15/2004 |
| 6695148 | Transmission filter felt A transmission fluid filter material and transmission filter produced therefrom comprising a gradient density composite felt which exhibits high particle removal efficiency at 40 micron diameter particle size and larger with exceptionally high dirt holdin... | 02/24/2004 |
| 6422395 | Filter with preferential fluid affinity A filter is composed of filter media having the following characteristics in combination: a) the filter media has a greater affinity for the filtered fluid than for contaminants in the fluid, and wherein the work of adhesion between the filter media and t... | 07/23/2002 |
| 6415930 | Separator cartridge A separator cartridge comprises a support screen comprising a substantially rigid reinforced plastic cylinder including an inner first major surface and an outer second major surface, a first nonwoven polymer layer adhered to the inner first major surface... | 07/09/2002 |
| 6390304 | High performance filters comprising inorganic fibers having inorganic fiber whiskers grown thereon A filter media system, which is capable of operating in the microfiltration regime, offers: low cost, durability, high temperature and chemical resistance, no particulation, mechanical strength, separation efficiency, and biocompatibility. The present inv... | 05/21/2002 |
| 6337026 | Leukocyte reduction filtration media A high capacity leukocyte depletion filtration media incorporates a high specific surface area components with a matrix of fibers, yielding a filtration medium that removes leukocytes by at least 99.99%. The filtration medium uses a significantly low weig... | 01/08/2002 |
| 6315130 | Pleated filter element A filter element according to the present disclosure includes a plurality of longitudinally extending pleats including outwardly radiating primary pleats and inwardly radiating secondary pleats, with at least one secondary pleat positioned between two adj... | 11/13/2001 |
| 6283307 | Filter medium and filter cartridge A filter medium is formed by preparing a pH 3-5 aqueous suspension of cellulose fibers in a pulper or beater with a concentration of between 3% and 5%. A pH 2.8-3.8 aqueous suspension of glass fibers is prepared in a pulper or beater with a fiber concentr... | 09/04/2001 |
| 6267898 | Leukapheretic filter medium A leukocyte-removing filter medium which comprises a matrix and ultra-fine fibers having a fiber diameter of less than 1.0 μm and not less than 0.01 μm which contains ultra-fine fibers in an amount of less than 50 wt % and not less than 0.1 wt %, the de... | 07/31/2001 |
| 6267252 | Fine particle filtration medium including an airlaid composite The present invention pertains to a filter medium including an airlaid composite, which is made of pulp fibers, at least about 2% by weight bicomponent fiber, and moisture. This airlaid composite is unique in that, when used as a filter medium, it exhibit... | 07/31/2001 |
| 6264045 | High performance filters comprising an inorganic composite substrate and inorganic fiber whiskers A filter media system, which is capable of operating in the microfiltration regime, offers: low cost, durability, high temperature and chemical resistance, no particulation, mechanical strength, separation efficiency, and biocompatibility. A filter media ... | 07/24/2001 |
| 6241886 | Plasma separation filter The present invention provides a plasma separation filter capable of easily, speedily and safely separating plasma from a small quantity of blood without damaging blood cell components in the blood. The plasma retains the same protein concentration as in ... | 06/05/2001 |
| 6146436 | Cartridge filter A cartridge filter having a cylindrical filter element, which is pleated parallel to its axis and is made of a layered non-woven unitary fabric. The fabric is permeable by air flow in the radial direction and is used in fresh air-supply filtration with in... | 11/14/2000 |
| 6048464 | Filter medium for leukocyte removal, method of making, and method of using thereof A leukocyte-removing filter material is described, which includes a porous element having fine pores of an average pore diameter of not less than 1.0 μm but less than 100 μm and a fiber structure composed of a plurality of fibers having an average fiber... | 04/11/2000 |
