Abutted Or Superimposed Members Patents (Class 210/488)
  • Publication number: 20080035551
    Abstract: A water purifier includes a base, an outer casing mounted on the base, a fresh water conduit demountably mounted in the outer casing, a plurality of filtering units demountably mounted on the fresh water conduit and a cover demountably mounted on the outer casing. Each filtering unit includes a membrane bag and multiple supporting members. The membrane bags are sandwiched by the supporting members and are arranged in a cascading manner. Gaps are formed between each pair of adjacent membrane bags so that the filtering bags can be cleaned directly.
    Type: Application
    Filed: August 9, 2006
    Publication date: February 14, 2008
    Inventor: Yu-San Kuo
  • Patent number: 7329296
    Abstract: A filter bag (1) for a filter device includes a tubular, flexible, air-penetrable filter body (6) provided with a suspension arrangement at an unfolded end thereof. The suspension arrangement includes a rigid ring element (7) with outwardly protruding members 10 annularly secured to the unfolded end of the filter body. The ring element (7) is arranged at least partially at an interior part of the filter body (6). Also a filter device including a housing with a dust chamber (4) and a clean-air chamber (5) that are separated by an partition wall (3) suspending at least one filter bag (1) as described above that extends through an opening (2) provided in the partition wall (3) with a main part of the filter body (6) located in the dust chamber (4). The ring element (7) of the filter bag (1) extends at least partially into the opening (2) in the partition wall (3).
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: February 12, 2008
    Assignee: Simatek A/S
    Inventors: Arne Jensen, Keld Christensen
  • Patent number: 7309428
    Abstract: The present invention relates to a process and apparatus for separating blood plasma, having a mixing unit in the form of a first injection having a first connecting tube and a first piston to provide a compartment for a mixture composed of plasma to be separated and the protein-precipitating agent; a separating unit composed of a filtering tube for separating and preserving a solid material after separation. The filtering tube includes a third connecting tube a filter and a third piston, the third connecting tube communicates with the fourth injection tube having a fourth piston for receiving a separated liquid; and a storage unit in the form of a fifth injection tube having a fifth connecting tube, a second connecting valve and a fifth piston.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: December 18, 2007
    Assignee: Industrial Technology Research Institute
    Inventors: Chen-Chi Tsai, Yung-Chih Wu
  • Patent number: 7306105
    Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: December 11, 2007
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
  • Patent number: 7306727
    Abstract: Tangential flow filtration device is provided wherein liners are provided between the filtration element and the top and bottom holders or manifolds. The liners incorporate the flow channels and inlet and outlet ports that were previously present in the manifolds. The liners are made of an inexpensive material and therefore are disposable after a single use, making it more cost effective to dispose of them than to clean the conventional manifolds. In addition, the liners can be pre-sterilized.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: December 11, 2007
    Assignee: Millipore Corporation
    Inventor: Jeremy Perreault
  • Patent number: 7293661
    Abstract: Granules comprise binder-agglomerated active particles for liquid treatment or filtration. Each granule has a center core of a material that itself has binding properties without the addition of other binders or sprays or adhesives, or, alternatively, each granule comprises a matrix of active materials stuck together with the binder. The binder structure preferably ranges from a non-uniform matrix of binder formed by heat-deformed binder particles, to a clump of binder particles generally retaining the original shape or the binder particles, to non-continuous connectors of binder between active particles. The invented two-part media has high surface area per volume of media, which, because the outer surface and inner void surfaces of the particles are preferably substantially covered with active particles, translates to high activity for the preferred treatment process.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: November 13, 2007
    Assignee: Omnipure Filter Company
    Inventors: Bruce D. Saaski, Roger P. Reid
  • Patent number: 7264724
    Abstract: A fluid path control element which when stacked alternatively with a fluid porous sheet can be formed into a filtration module. The fluid path control element comprises a porous membrane having sealed to a portion of its periphery a thermoplastic element that extends into an opening either through the membrane or in an opening through the thermoplastic element. The portion of the thermoplastic element that extends into the opening can be heat sealed with a second thermoplastic element to prevent fluid flow between the opening and the membrane.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: September 4, 2007
    Assignee: Millipore Corporation
    Inventors: James J. Vigna, James E. Kelly, Jr., Wayne S. Merrill
  • Patent number: 7264652
    Abstract: The collecting filter can capture and collect various chlorinated organic compounds in both particulate form and gaseous form contained in a fluid at the same time, and is easy to extract the collected chlorinated organic compounds therefrom. This collecting filter 7 is provided with a fluid-permeable molded body containing fibers and an inorganic binder for binding the fibers to one another, and a hydrophobic material having higher hydrophobicity than that of the fibers and the inorganic binder, which is retained in the molded body. Various chlorinated organic compounds such as dioxins in both particulate form and gaseous form contained in the sample gas are captured and collected upon passage through the collecting filter 7.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: September 4, 2007
    Assignees: Miura Co., Ltd., Osaka Gas Co., Ltd.
    Inventors: Katsuhisa Honda, Noriaki Hamada, Hirofumi Nakamura, Hisaji Matsui, Kiyotaka Kobayashi
  • Patent number: 7252764
    Abstract: The invention is a method for fabricating molecular filters which can separate objects approximately 1-5 nm in range, where the filtration size is controlled by using thin films of materials and technologies to form a filtration channel or pore in a middle thin film layer in a multilayered structure. Lithography is used to define two offset arrays of blind holes into the opposing sides of a multi-layer membrane. The blind holes extend across a thin central filtration layer. A selective etch is used to attack the filtration layer to form a communicating channel between the two holes. The only connection between one side of the filter and the other is through the channel in the filter layer, whose thickness, d, determines the largest size object which can traverse the filter.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: August 7, 2007
    Assignee: California Institute of Technology
    Inventor: Axel Scherer
  • Patent number: 7210584
    Abstract: A filter device, in particular, for high-pressure applications in a molten polymer filtration, has a screw-in piece (10), provided with a first threaded section (12) for fixing the filter device, and a second threaded section (14) for fixing a filter medium (16), in particular, in the form of a metal wool and with a perforated support tube (18) for the metal wool. The other free end of the filter device is provided with a volume displacer (24). The metal wool is surrounded by a support grid (20) and fixed by two fixing pieces (28, 30), held at a separation from each other by the support grid (20). One fixing piece (28) is fixed to the second threaded section (14) of the screw-in piece (10). The other fixing piece forms a handle (30) for the fixing formed.
    Type: Grant
    Filed: August 24, 2002
    Date of Patent: May 1, 2007
    Assignee: Hydac Process Technology GmbH
    Inventors: Ralf Wnuk, Jürgen Hausdorf, Thomas Schorn, Otto Sandmeyer, Norbert Lang
  • Patent number: 7210585
    Abstract: An edge filter assembly is disclosed. The edge filter assembly may include a housing having an inlet and an outlet. The edge filter assembly may further include a filter element disposed within the housing including first and second filter plates and first and second spacers disposed between the first and second filter plates. The spacers and filter plates may be configured and arranged to form a flow channel extending generally radially within the housing and defined between the first and second filter plates and the first and second spacers. The flow channel may have an inner flow gate and an outer flow gate. The inner flow gate may be disposed radially inward of the outer flow gate and may have a different cross-sectional configuration than the outer flow gate. The first filter plate may have an axial projection extending therefrom generally aligned with a fluid path within the housing.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: May 1, 2007
    Assignee: Caterpillar Inc
    Inventor: Thomas J Hajek
  • Patent number: 7178675
    Abstract: A drain water filter assembly for filtering debris laden liquids. The filter assembly has an apertured filter holder constructed and arranged to be placed into a basin, tub or sink. A removable and disposable filter is provided for placement within and securement to the filter holder structure. The filter holder has an elevated bottom portion which permits debris to be filtered and the filtered drain water to be dispensed through the apertures in the elevated portions of the filter holder bottom.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: February 20, 2007
    Inventor: John C. Votel
  • Patent number: 7175762
    Abstract: A nanofeature particulate trap comprising a plurality of densely packed nanofeatures, such as nanotubes, and a particulate detector incorporating the nanofeature particulate trap are provided. A method of producing a nanotrap structure alone or integrated with a particulate detector is also provided.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: February 13, 2007
    Assignee: California Institute of Technology
    Inventors: Flavio Noca, Brian D. Hunt, Michael J. Bronikowski, Michael E. Hoenk, Robert S. Kowalczyk, Daniel S. Choi, Fei Chen
  • Patent number: 7172076
    Abstract: An internal filter includes a lower substrate and an upper substrate. Fluid passages are formed by etching grooves into the surfaces(s) of the upper and/or lower substrates and/or in one or more intermediate layers. The filter pores extending between the fluid passages are formed by etching second grooves that fluidly connect the fluid passages. Two or more sets of the one or two intermediate layers can be implemented to provide additional filter passages and/or pores. Each set can be connected to a separate fluid source and/or a separate microfluidic device. In another internal filter, the inlet and outlet passages and the filter pores are formed on the same upper or lower substrate. The inlet and outlet passages are partially formed in a first step. In a second step, the inlet and outlet passages are completed at the same time that the filter pores are formed.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: February 6, 2007
    Assignee: Xerox Corporation
    Inventor: Gary A. Kneezel
  • Patent number: 7153424
    Abstract: An apparatus for purifying water, that includes a frame, in connection with which is arranged a primary space for water to be filtered, secondary space for filtered water and a filter. The filter is arranged to filter water, that is driven by gravity from the primary space existing in the frame to the secondary space, wherein the filtering influence of the filter is based essentially on a thin filtering film made of plastic based material. Essentially underneath the primary space is arranged an accessory space for the filtering means, that is in connection with the primary space and that has an essentially smaller cross-section than the same, in order to keep the filter surrounded by unclean water in the auxiliary space of the primary space, being limited from the secondary space, totally separate from the secondary space.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: December 26, 2006
    Inventors: Kari Aalto, Valery Antipov, Alexander Melnikov
  • Patent number: 7138058
    Abstract: Semi-permeable membranes are described that allow for the efficient processing of many liquid based feed solutions, particularly those that contain acids. The membranes of this invention are able to process such feeds with high permeate rates while maintaining excellent retention of dissolved metals, cations, and organic compounds, even in the presence of hot concentrated acids. The semi-permeable membranes of this invention are able to conduct such separations for a useful period of time due to their chemical stability towards acids and their ability to permeate acids.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: November 21, 2006
    Assignee: GE Osmonics, Inc.
    Inventors: Christopher J. Kurth, Steven D. Kloos, Jessica A. Peschl, Leonard T. Hodgins
  • Patent number: 7135114
    Abstract: In a filtration device (1) comprising a pressure-resistant housing (2) with a liquid inlet opening (3) and an outlet opening (4) for filtered matter, into which a collecting channel (12) terminates, at least one filter element (8–11) designed as flat membrane is connected to the collecting channel (12) in a pressure-tight manner. This device provides a high liquid throughput at the same time having a compact construction.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: November 14, 2006
    Assignee: ItN Nanovation GmbH
    Inventors: Ralph Nonninger, Olaf Binkle, Romeo Volz, Hans-Jürgen Schmidt
  • Patent number: 7128772
    Abstract: 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 fiber layer made of a fiber fabric. The at least one covering layer forms a sleeve that encloses the fiber layer so that the fiber layer is permanently disposed inside the at least one covering layer. The filter assembly makes it possible to produce a filter body that can be used, in particular, for cleaning exhaust gases of mobile internal combustion engines.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: October 31, 2006
    Assignee: Emitec Gesellschaft fuer Emissionstechnologie mbH
    Inventor: Rolf Brück
  • Patent number: 7104406
    Abstract: A micro-filter for filtering blood cells has a plurality of filtering channel structures, each having a first through hole and a first concave portion connecting to each other, and a plurality of through channel structures respectively connect to the filtering channel structures. Each defines a second through hole opposite the first concave portion, whereby the filtering channel structures are respectively attached to the through channel structures to provide more than two filtering effects.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: September 12, 2006
    Assignee: Industrial Technology Research Institute
    Inventors: Wae-Honge Chen, Kai Cheng Chang, Guang-Chyeng Fan, Pei-Fang Liang
  • Patent number: 7094347
    Abstract: The present invention provides a positively charged microporous membrane having a protein binding capacity of about 25 mg/ml or greater comprising a hydrophilic porous substrate and a crosslinked coating that provides a fixed positive charge to the membrane. The present invention further provides a positively charged microporous membrane comprising a porous substrate and a crosslinked coating comprising pendant cationic groups. The membranes of the present invention find use in a variety of applications including ion-exchange chromatography, macromolecular transfer, as well as detection, filtration and purification of biomolecules such as proteins, nucleic acids, endotoxins, and the like.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: August 22, 2006
    Assignee: Pall Corporation
    Inventors: Xiaosong Wu, Chung-Jen Hou, Jayesh Dharia, Peter Konstantin, Yujing Yang
  • Patent number: 7033499
    Abstract: A disposable flexible vessel contains a septum, dividing a first chamber from a second chamber. By flowing a fluid through the septum, the fluid is treated as it moves from the first chamber to the second chamber. The particular configuration of the septum allows for treatments such as mixing, reacting, heating, and cooling, as well as filtering of the fluid.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: April 25, 2006
    Assignee: ILC Dover LP
    Inventors: Donald R. Cohee, Ajay K. Prasad
  • Patent number: 7025212
    Abstract: A plasma- or serum-collecting device with simple structure and easy to handle is provided. The device comprises a vacuum blood drawing tube accommodating a blood-filtering unit, wherein the vacuum tube contains a space above the blood-filtering unit to preserve blood to be filtered and a partition wall under the blood-filtering unit to keep a backspace at reduced pressure, and the blood-filtering unit contains a communicating needle to break the partition wall at the bottom.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: April 11, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshikazu Amano, Toshihiro Mori
  • Patent number: 7000781
    Abstract: The invention relates to a filtering device for taking a filtrate sample from liquid matter containing solid particles. The filtering device comprises two filter parts and at least one filtering slot between the filter parts. The filter parts are adapted to move in relation to each other in such a manner that the width of the filtering slot changes when the filter parts move in relation to each other. When taking a sample from a process, the filtering slot between the filter parts is at its smallest, and it is adapted to filter the sample while the liquid matter being measured flows from the process to the measurement. When rinsing the filtering device against the sampling direction, the filter parts are adapted to move away from each other, whereby the filtering slot widens.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: February 21, 2006
    Assignee: Metso Automation OY
    Inventor: Veikko Kyllönen
  • Patent number: 6986429
    Abstract: The invention concerns an anti-microbial porous part based on a polymeric material grafted at the surface and in its volume with ammonium motifs with anti-microbial and/or bactericidal and/or fungicide activity, preferably benzalkonium. The invention is characterized in that it has a porosity sufficiently high to enable a liquid with compatible viscosity to pass through its structure and sufficiently low to trap contaminating germs within said structure.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: January 17, 2006
    Assignee: Laboratoire Chauvin S.A.
    Inventors: Mohammad Naji, Bernard Pages, Jacques Lacombes
  • Patent number: 6986427
    Abstract: A non-woven melt-blown filament medium includes a 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 dimension, and a latitudinal dimension. The mass includes a plurality of layers, each of the plurality of layers being generally oriented in the longitudinal and latitudinal dimensions. The traversing filament is generally oriented in the depth dimension and extends through at least one layer of the mass. In one embodiment, the mass is cylindrical in shape and the layers comprise concentric zones. The traversing filament is intentionally deposited and positioned to improve the physical properties of the mass.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: January 17, 2006
    Assignee: GE Osmonics, Inc.
    Inventors: Thomas M. Aune, Clinton V. Kopp, Michael J. Madsen, Philip M. Rolchigo, Travis G. Stifter
  • Patent number: 6986428
    Abstract: The present invention includes a membrane construction for selectively transferring a constituent to or from a fluid. The membrane construction includes a multi-layer fluid impermeable support sheet having a plurality of supports on at least one side of the support sheet that form a plurality of flow channels. At least one layer of the multi-layer support sheet is a bonding layer. A fluid permeable layer extends over the flow channels and is bonded to the plurality of the supports by the bonding layer.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: January 17, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Jonathan F. Hester, Brian E. Spiewak, Philip D. Radovanovic, Stefan R. Reimann, Robert S. Kody
  • Patent number: 6984322
    Abstract: The present invention relates to a biaxially stretched, laminated, white microporous polyester film, which can be used in a wide range of industrial applications including printing, imaging, advertising and display. The film of the present invention comprises a porous polyester resin layer B containing a thermoplastic resin non-compatible with polyester; a polyester resin-based photic layer A formed on one surface of the resin layer B, the photic layer A having a 60-degree gloss of the surface thereof of more than 100%; and an aphotic layer C formed on the other surface of the resin layer B, the aphotic layer C having a 60-degree gloss of the surface thereof of less than 50%. The total density of the photic layer A and the aphotic layer C is 0.55–1.2 g/cm3. This film has excellent gloss and flexibility so that it is very suitable for use in printing and imaging.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: January 10, 2006
    Assignee: Toray Saehan, Inc.
    Inventors: Chang-Ho Suh, Ki-Bong Suh, Sang-Pil Kim
  • Patent number: 6955761
    Abstract: Filters, more particularly to multifunctional filters that are capable of removing as well as adding components to a filtered material are provided by the present invention. In addition to a multifunctional filter, the present invention relates to the use of such a multifunctional filter in an apparatus, to process a filtrate and to the filtrate produced by the process of the present invention.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: October 18, 2005
    Assignee: Procter & Gamble Company
    Inventors: Paul Amaat Raymond Gerald France, Arseni Valervich Radomyselski, Dewey Edward Burton
  • Patent number: 6938781
    Abstract: 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 dimension, and a circumferential dimension. The mass includes a plurality of layers, each of the plurality of layers being generally oriented in the longitudinal and circumferential dimensions. The traversing filament is generally oriented in the depth dimension and extends through one or more layers of the mass. In one embodiment, the layers of the mass comprise concentric zones. The traversing filament is intentionally deposited and positioned to improve the physical properties of the filter cartridge.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: September 6, 2005
    Assignee: Osmonics, Incorporated
    Inventors: Thomas M. Aune, Clinton V. Kopp, Michael J. Madsen, Philip M. Rolchigo, Travis G. Stifter
  • Patent number: 6913153
    Abstract: The invention relates to a composite membrane (1) consisting of a flat support body (2) comprising relative big through flow holes (3) and on which at least one separating layer is applied as a membrane layer (4) having a given number of pores and pore sizes. In order to regulate the temperature of the support body, said support body (2) is connected to a device (5) that can be regulated by a regulating device (S) with the purpose of supplying a predetermined energy to the support body (2) and/or diverting energy from the support body (2). The membrane layer (4) is applied on the support body (2) in a heat-conductive manner so that any change in the temperature of the support body provokes a change in the temperature of the membrane layer.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: July 5, 2005
    Inventors: Joachim Neubert, Karl-Ferdinand Staab
  • Patent number: 6896818
    Abstract: A water treatment and recycling system to provide grey water and crystal clear water to a stone processing system including crystal clear water stone fabrication equipment requiring crystal clear water and grey water stone fabrication equipment capable of using grey water. The system includes a waste water storage tank connected from the waste water discharge ports of the crystal clear water and grey water stone fabrication equipment, a grey water supply loop for pumping waste water from the waste water storage tank as grey water to the grey water stone fabrication equipment and a crystal clear water supply loop for pumping waste water through a high pressure filter to convert the waste water into the crystal clear water, and a crystal clear water supply pump for pumping crystal clear water to crystal clear water stone fabrication equipment. The high pressure filter includes a frame holding a filter stack.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: May 24, 2005
    Assignee: PKP Revocable Trust
    Inventors: Ross E. Perry, Paula K. Perry
  • Patent number: 6878292
    Abstract: A filter device has a filter housing, which is intended to contain a liquid to be filtered and in which at least one filter rod is arranged. The filter rod is composed of annular washers, which are arranged in a stack on a core formed with openings and which are so closely packed that particles in the liquid adhere to the periphery of the washers when the liquid is caused, from the outside, to pass between the washers into the core for filtration. The filter device has a gas supply member, which is intended to inject a gas flow into the liquid in the filter housing. In a method of cleaning a filter rod for filtering a particle-containing liquid in such a filter device, a gas flow is injected into the liquid in the filter housing so that a particle sock, which is formed on said filter rod of particles in the liquid, is detached from the filter rod and disintegrated.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: April 12, 2005
    Assignee: O. Malmvist AB
    Inventors: Nils Zinn, Björn Hedin, Lars Svensson
  • Patent number: 6861003
    Abstract: An apparatus according to the invention includes filter sticks housed within a pressure vessel. Each filter stick includes a plurality of filter disks stacked about a fluid-pervious tube with a hollow core and retained about the tube by a retainer at each end. The filter sticks are disposed within a first compartment having fluid to be filtered with the hollow core of the tube in fluid communication with a second compartment for filtrate. A compression regulator, which is responsive to pressure within the compartment, is linked to at least one of the retainers so as to control relative movement between the retainers, which controls compression of the disks and interstitial space for fluid to flow therebetween. In use, automated compression control of the disks compensates for the effect of particle build-up in the filter, which would otherwise decrease the rate of flow through the filter.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: March 1, 2005
    Assignee: Transor Filter USA, Inc.
    Inventors: Sune Backman, Nicholas Maropis
  • Patent number: 6854601
    Abstract: A bacteriostatic filter cartridge having a porous core member about which is layered a yarn and/or a polyester membrane and/or melt blown web of polypropylene and/or a trilaminate polypropylene membrane, any or all of which may be impregnated with an antimicrobial agent. The filter cartridge is sized so as to fit tightly into a cartridge housing of a fluid filtration system. Fluid passing through the cartridge housing will be filtered by the filter cartridge to remove contaminants from the water and which prevents the growth of bacterial and other microorganisms on the filter media.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: February 15, 2005
    Assignee: Microban Products Company
    Inventor: Arvind S. Patil
  • Patent number: 6852231
    Abstract: Blood is purified by removing the whole blood from a patient and feeding the blood into a manifold in a centrifuge. A purifying chamber is formed in the centrifuge from a plurality of co-arcuately arranged modules. The blood is supplied from the manifold to each of the modules. Each module contains a stack of dialysate membranes. Fresh dialysate is fed into the manifold and then to each of the modules. Under centrifugal force the cells are separated from the plasma. The plasma is purified by removing contaminants as a result of the action of the dialysate and membranes. The purified blood is returned to the patient by being fed back to the manifold and then to the patient. The used dialysate/contaminants are fed from the modules back to the manifold and out of the centrifuge.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: February 8, 2005
    Assignee: Denco, Inc.
    Inventors: Ivars V. Ivansons, Dudley W. C. Spencer
  • Patent number: 6851561
    Abstract: The present invention provides a positively charged microporous membrane having a protein binding capacity of about 25 mg/ml or greater comprising a hydrophilic porous substrate and a crosslinked coating that provides a fixed positive charge to the membrane. The present invention further provides a positively charged microporous membrane comprising a porous substrate and a crosslinked coating comprising pendant cationic groups. The membranes of the present invention find use in a variety of applications including ion-exchange chromatography, macromolecular transfer, as well as detection, filtration and purification of biomolecules such as proteins, nucleic acids, endotoxins, and the like.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: February 8, 2005
    Assignee: Pall Corporation
    Inventors: Xiaosong Wu, Chung-Jen Hou, Jayesh Dharia, Peter Konstantin, Yujing Yang
  • Patent number: 6849185
    Abstract: The present invention provides a hydrophilic charged microporous membrane comprising a porous hydrophobic substrate and a coating comprising a charge-providing agent. The present invention further provides a hydrophilic charged membrane comprising a porous hydrophobic substrate and a hydrophilic charge-providing agent distributed within the substrate. The present invention further provides a filter as well as a filter device comprising the inventive hydrophilic charged membrane. The present invention further provides a process for treating a fluid containing bacterial contaminants such as endotoxins comprising contacting the membrane with the fluid to provide a bacterial contaminant depleted fluid.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: February 1, 2005
    Inventors: Xiaosong Wu, Joe L. Kinsey, Jr., Michael Ishee, Peter Konstantin, Joel Shertok, Yujing Yang
  • Patent number: 6841066
    Abstract: A filter and housing (10) for waste water treatment includes a housing (10) having a plurality of coaxially mounted vertically extending sections adaptable to receive a filter cartridge therein. An upper section (12) is provided with an outlet consisting of at least two coaxially aligned rings (22) of preselected diameters wherein the thickness of the rings and the spacing between the rings is sufficient to receive waste water treatment outlets of different diameters. The filter cartridge is comprised of a stacked arrangement of a plurality of disc-dam units (32) wherein each disc-dam unit (32) is provided with a serpentine configured first dam (46), the first dam extending upwardly from an upper surface of the disc-dam unit, the first dam having terminating ends spaced at outer terminating edges (34a, 34b) of the disc dam unit to define a cord segment therebetween. The terminating ends are connected by a second dam (46) having a height less than the first dam.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: January 11, 2005
    Inventors: Harry L. Nurse, Jr., John Christensen
  • Patent number: 6837996
    Abstract: Sulfonamide polymer matrices and their various uses are disclosed. Among the uses is the configuration of the matrix with a porous support membrane to form a semipermeable membrane of the invention. The matrix of the invention is ultrathin, dense and substantially free of defects. The matrix configuration as the semipermeable membrane shows improved permeate flux and retention values.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: January 4, 2005
    Assignee: GE Osmonics, Inc.
    Inventors: Christopher J. Kurth, Steven D. Kloos, Jessica A. Peschl, Leonard T. Hodgins
  • Patent number: 6838004
    Abstract: A nanoporous reactive adsorbent incorporates a relatively small number of relatively larger reactant, e.g., metal, enzyme, etc., particles (10) forming a discontinuous or continuous phase interspersed among and surrounded by a continuous phase of smaller adsorbent particles (12) and connected interstitial pores (14) therebetween. The reactive adsorbent can effectively remove inorganic or organic impurities in a liquid by causing the liquid to flow through the adsorbent. For example, silver ions may be adsorbed by the adsorbent particles (12) and reduced to metallic silver by reducing metal, such as ions, as the reactant particles (10). The column can be regenerated by backwashing with the liquid effluent containing, for example, acetic acid.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: January 4, 2005
    Assignee: Industrial Science & Technology Network, Inc.
    Inventors: Arthur Jing-Min Yang, Yuehua Zhang
  • Publication number: 20040256309
    Abstract: A composite semipermeable membrane which satisfies the following relationship when seawater at 25° C. having a pH of 6.5, a boron concentration of 5 ppm and a TDS concentration of 3.5% by weight is permeated under an operation pressure of 5.5 MPa: Boron removal ratio (%)≧95−4×membrane permeation flow rate (m3/m2·day).
    Type: Application
    Filed: June 14, 2004
    Publication date: December 23, 2004
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Hiroki Tomioka, Kazuya Sugita, Katsufumi Oto
  • Publication number: 20040256310
    Abstract: A method for creating a highly breathable and waterproof fabric based on hydrophobic plastic (such as PVDF) as a membrane layer. This new fabric allows higher water vapor throughput and better water resistance than other PVDF and ePTFE membranes. This is achieved through control of pore size, thus creating a spongy porous structure, pre-stressing to make the membrane and subsequent laminated fabric soft, and a microscopically folded structure which increases the surface area for the porous media, thus gaining higher throughput, waterproofness and comfort. In addition, the invention provides a method of controlling pore size distribution, increased porosity and pre-stress relief during the gelation proces.
    Type: Application
    Filed: June 17, 2004
    Publication date: December 23, 2004
    Inventor: Dah Yu Cheng
  • Publication number: 20040245169
    Abstract: The invention relates to a filter element for fluids, in particular for hydraulic fluids, comprising a filter material and a grid-like supporting structure supporting the filter material at least on its outflow side in relation to the flow direction of the filter element. In order to further develop the filter element such that it has a high mechanical stability, whilst static charges are avoided, it is proposed in accordance with the invention that the supporting structure comprise elements made from a plastics material and electrically conductive elements.
    Type: Application
    Filed: April 13, 2004
    Publication date: December 9, 2004
    Applicant: ARGO-HYTOS GmbH
    Inventor: Norbert Breusch
  • Patent number: 6827851
    Abstract: The invention relates to a filter module (4) with a simplified design which allows for the manufacturing of a step filter, Each ply of filter medium is composed of a deep-bed filter material layer (1, 1a-d) and the packing is composed of draining layers (5, 5a, 5b). The draining layers (5, 5a, 5b) and filter layers (5, 5a, 5b) are mutually sealed to the filtrate/non-filtrate chamber (2,3). The filter layers (1, 1a-d) can be arranged according to any pattern.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: December 7, 2004
    Assignee: Pall Corporation
    Inventors: Gerhard Strohm, Georg Schnieder
  • Publication number: 20040238448
    Abstract: Filter or filter-element designated for Modified Electro-Dialysis (MED) purposes characterized in that the filter or filter-element comprises a porous, ceramic, mainly uniform material with functional, preferably ion selective groups grafted onto the inner, porous surface of the ceramic body. The outer surface of the filter or filter-element may be completely or partly covered by layers of porous, ceramic membranes with a pore size of less than 1 &mgr;m and thickness less than 1 mm, and/or anion, cation or bipolar groups or membranes. The thickness of the filter-element is larger than 1 mm and has pores of size larger than 1 &mgr;m. The invention also relates to a method for the manufacture of such a filter either continuously by tape-casting, extruding, rolling or calendaring or single-bodied by casting, pressing or forging, of a paste containing a non-conductive, ceramic material.
    Type: Application
    Filed: June 26, 2003
    Publication date: December 2, 2004
    Inventor: Bernt Thorstensen
  • Patent number: 6825136
    Abstract: A filtering screen comprises a fine woven wirecloth filtering mesh (4) disposed above a coarse woven wirecloth support mesh (2). An intermediate woven wirecloth mesh (3) is disposed between the fine woven mesh (4) and the coarse woven mesh (2), the intermediate mesh (3) extending over a proportion of the area of the screen at or towards the rear thereof, said proportion being in the range of 20% to 40% of the area of the screen, and preferably substantially one third of the area of the screen.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: November 30, 2004
    Assignee: United Wire Limited
    Inventor: Gordon James Cook
  • Publication number: 20040226886
    Abstract: The present invention includes a membrane construction for selectively transferring a constituent to or from a fluid. The membrane construction includes a multi-layer fluid impermeable support sheet having a plurality of supports on at least one side of the support sheet that form a plurality of flow channels. At least one layer of the multi-layer support sheet is a bonding layer. A fluid permeable layer extends over the flow channels and is bonded to the plurality of the supports by the bonding layer.
    Type: Application
    Filed: May 14, 2003
    Publication date: November 18, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Jonathan F. Hester, Brian E. Spiewak, Philip D. Radovanovic, Stefan R. Reimann, Robert S. Kody
  • Publication number: 20040226875
    Abstract: A filtration module is provided having a packing density of at least 300 square meters of active membrane filter area per cubic meter of external volume of said filter construction, said filter constructed of materials characterized by less than 250 mg of extracted contamination per m2 of extracted wetted material. The filtration module includes a membrane composite layer comprising a filtrate screen sealed to each surface of a membrane layer with a thermoplastic polymeric composition positioned about the periphery of the filtrate screen.
    Type: Application
    Filed: March 19, 2004
    Publication date: November 18, 2004
    Inventors: Andrew Bartlett, Mark Chisholm, George Gagne, Robert Jackson
  • Publication number: 20040222146
    Abstract: A composite semipermeable membrane which combines the high ability to reject salts and a high permeation flux and is especially excellent in the ability to reject uncharged substances, and a process for producing the semipermeable membrane are disclosed. The process comprises forming on a surface of a porous supporting film a thin film comprising a polyamide resin obtained by reacting a polyfunctional amine ingredient with a polyfunctional acid ingredient in the presence of at least an alkali metal hydroxide and an organic acid.
    Type: Application
    Filed: April 19, 2004
    Publication date: November 11, 2004
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masahiko Hirose, Masakatsu Takata
  • Publication number: 20040222157
    Abstract: A method for recovering acid from a feed mixture comprising acid, hydrocarbons and water, the method comprising:
    Type: Application
    Filed: February 6, 2004
    Publication date: November 11, 2004
    Inventors: Bhupender S. Minhas, Dennis G. Peiffer, Jorge L. Soto, David L. Stern, Tomas R. Melli, Jeffrey S. Beck, Steven Ackerman, David C. Dalrymple, Alexander D.S. Fremuth, Walter Weissman, Frederick J. Krambeck