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| Number | Title | Issue Date |
| 4867876 | Filter plate, filter plate element, and filter comprising same A filter plate which is longitudinally partitioned between its inlet and outlet ends, and features liquid feed and collection troughs at the respective ends which are of progressively decreasing depth from the medial part of the trough to the extremities ... | 09/19/1989 |
| 4863596 | Cell alignment frame assembly A special, easy to use, economical frame is provided to quickly and efficiently align water purification cells in a vertical stack. The dependable, effective frame has moveable side and back posts and convenient crank or slide rod adjustments.... | 09/05/1989 |
| 4849102 | Bidirectional ultrafiltration apparatus A pair of membrane ultrafiltration cells are mounted one on each of the front and back surfaces of a central bidirectional manifold having an exit and an entrance conduit connector on the same side wall of the manifold. The manifold takes fluid to be filt... | 07/18/1989 |
| 4837157 | Sample preparation method for liquid chromatography A plurality of analytes are analyzed by liquid chromatography in a liquid biological sample containing many components which can interfere with analysis by liquid chromatography. The sample, containing the analytes of interest, are passed to a first passa... | 06/06/1989 |
| 4832839 | Hemopurification apparatus A hemopurification apparatus includes a porous membrane permeable to gas but impermeable to liquid and dividing a container into two mutually-isolated compartments. The apparatus is adapted to remove water from blood by causing the blood to flow through o... | 05/23/1989 |
| 4832840 | Membrane filter plate having improved bending characteristics of the membrane Membrane filter plate for a filter press or the like, with a carrier plate, at least one membrane arranged on one side of the carrier plate and preferably provided with spacing cams or the like for applying a filter cloth or the like and a sealing edge su... | 05/23/1989 |
| 4812293 | Vacuum actuated assay device and method of using same A method for assay of an analyte and assay device therefor. The assay device includes an assay component affixed to a permeable membrane. The membrane preferably rests on a permeable membrane support and covers an opening through a receptacle for holding ... | 03/14/1989 |
| 4806247 | Plasmapheresis system and method A reliable flow rate plasmapheresis system includes a rotating enhanced vortex type of membrane filter coupled to receive a flow of anticoagulated whole blood and separate concentrate and filtrate in responses thereto. An anticoagulant pump is coupled to ... | 02/21/1989 |
| 4789468 | Immobilized-interface solute-transfer apparatus An immobilized-interface solute-transfer unit for transferring solute from a feed solution to an extractant liquid comprises a fluid-tight housing and a porous membrane which divides the housing into a feed solution chamber and an extractant chamber. The ... | 12/06/1988 |
| 4786474 | Flow-through housing An apparatus for sensing characteristics of a substance, such as blood, including a membrane support having first and second recesses and first and second dissimilar membranes extending over the first and second recesses, respectively. The membrane suppor... | 11/22/1988 |
| 4769140 | Apparatus for the separation of mixtures by means of pervaporation An apparatus for membrane pervaporation, in which a raw feed chamber, constituting two partial chambers, is formed by two plates. On the respective sides of each plate which are faced away from each other, there is a surrounding profile, which serves as s... | 09/06/1988 |
| 4769145 | Centrifugal ultrafilter unit for ultrafiltration of biochemical solutions A separator (1; 51) including a solution reservoir (3; 53) having a solution chamber (3a; 53a) for putting therein a solution, a membrane support base (4; 54) joined to the solution reservoir, an ultrafiltration-oriented filtering membrane (5; 55) held be... | 09/06/1988 |
| 4750983 | Fluid separation cells and spacers for use in these A spacer sheet for use together with another spacer sheet between adjacent membranes (17) in a fluid separation cell, for example an electroldilysis cell, has an open center (2), conduit passages (8 and 9) for the supply and withdrawal of fluid to the cha... | 06/14/1988 |
| 4741832 | Purification apparatus and method employing a regenerable ligand An apparatus and method for purifying a fluid stream employ a bed of regeable ligands affixed to one side of a semipermeable membrane. A ligate-laden fluid stream is conducted along the one membrane side, and the ligands selectively remove the ligates fr... | 05/03/1988 |
| 4735718 | Multilayer membrane separator A multilayer membrane separator which permits serial and tangential contact of a retentate with a plurality of membranes within the separator. The separator is formed from a plurality of contiguous separator units each consisting of two membrane layers, t... | 04/05/1988 |
| 4735726 | Plasmapheresis by reciprocatory pulsatile filtration A process for continuous plasmapheresis, which process comprises conducting blood over a microporous membrane in reciprocatory pulsatile flow, and preferably further comprises reducing the transmembrane pressure difference to below zero during each forwar... | 04/05/1988 |
| 4698154 | Apparatus for filtering and separating flowing media A modular unit as a filtering apparatus for a membrane separation process, especially for treating water by reverse osmosis, includes a pipe which is open at both ends. A stack of membranes adapted to the inner diameter of the pipe can be inserted into th... | 10/06/1987 |
| 4661458 | Cell culture system A device is described which provides a totally enclosed and secure environment for the culture of cells and for the production of biologicals, pharmaceuticals, and other cell-derived products of commercial value. The device comprises several modules of di... | 04/28/1987 |
| 4636473 | Membrane and static mixer-moderated bioreactor with anti-fouling device A bioreactor arrangement comprises a housing defining a closed space having a longitudinal axis with at least two spaced apart microporous membranes fixed therein dividing the space into a first chamber on one side of one of the membrane, a second chamber... | 01/13/1987 |
| 4624784 | Apparatus including a flow path formed by membrane compression Apparatus for altering the concentration of a pre-selected component (11) of a feestock (12) wherein the feedstock (12) flows through flowpaths bounded by overlying barriers (13) which selectively pass the component (11). Flow of feedstock (12) elasticall... | 11/25/1986 |
| 4540492 | Method and apparatus for treating whole blood Apparatus for oxygenating blood or for separating whole blood into a plasma fraction and an enriched plasma-depleted blood fraction comprising at least two contiguous membrane units, each unit consisting of a first membrane layer, a second membrane layer,... | 09/10/1985 |
| 4500426 | Semipermeable membrane elements A semipermeable membrane element of the type incorporating a flat semipermeable membrane and useful as an artificial kidney. A wave-shaped spacer is provided in intimate contact with the active side of the membrane and forms a multiplicity of parallel cha... | 02/19/1985 |
| 4430218 | Separating device for fluids, consisting of support plates and cut sections of a semi-permeable diaphragm A filtration or diffusion cell, consisting of adjacent facing support plates and cut diaphragm sections of a semi-permeable diaphragm, for the treating fluids. The support plates are sealed by stringlike or bandlike sealing elements for the separate flow ... | 02/07/1984 |
| 4422936 | Device for the diffusion of substances between two fluids via semipermeable membranes A device for the diffusion of substances between fluids through semi-permeable membranes is disclosed. The device includes a stack of alternating spacer plates and semi-permeable membranes including transverse passages for each of the fluids so that one o... | 12/27/1983 |
| 4411784 | Stacked plate transfer device This disclosure relates to a transfer device, such as an artificial kidney, which is formed of a plurality of identical plates and wherein between each pair of adjacent plates first and second fluids flow on opposite sides of a transfer membrane. One face... | 10/25/1983 |
| 4371438 | Fluid treatment apparatus, a casing for enclosing and compressing a stack of flat elements therein, and a process for making such an apparatus Fluid treatment apparatus is disclosed in which a stack of flat membrane elements and support plates are enclosed and compressed by means of a casing which comprises two endplates between which the stack is arranged, the internal faces of the endplates be... | 02/01/1983 |
| 4342723 | Gas-exchange sheet members A sheet member of silicone rubber suitable for use in gas-exchange such as oxygenation and decarbonation of blood in an oxygenator of a mechanical heart and lung is proposed. The sheet member of the invention is provided with a plurality of capillary pore... | 08/03/1982 |
| 4323455 | Compact type fluid treatment apparatus The apparatus according to this invention is provided with a stack assembly composed of two kinds of cells disposed in such order of arrangement that the adjacent cells are different in kind from each other. A first cell includes a first fluid distributio... | 04/06/1982 |
| 4312729 | Dewatering with electrically augmented vacuum filter A perm-selective membrane is used in an electrokinetic cell of an electrically augmented vacuum filter (EAVF) to prevent the migration of anions from the anode and optionally cathode compartments. The perm-selective membrane in the form of a film laminate... | 01/26/1982 |
| 4310416 | Plate type fluid treatment apparatus A small-sized plate type fluid treatment apparatus for filtration and separation of fluid, transferring substances between fluids through membranes or passing specific substances contained in the fluid through membranes. Said apparatus consists of a plura... | 01/12/1982 |
| 4264079 | Assembly for the transfer of a fluid between a duct and a space between two thin sheets Assembly is disclosed for connecting a duct to a hole in a flat sheet including a wall for receiving one surface of the flat sheet, a nozzle adapted to be sealingly connected to a duct, the nozzle protruding through and beyond the wall such that the flat ... | 04/28/1981 |
| 4263017 | Permeable membrane assembly The permeable membrane assemblies disclosed in this application utilize the bi-leaf edge membrane concept and the lay-flat tubing connector concept presented in prior and pending patents for ionic systems. Herein these concepts are shown and claimed for t... | 04/21/1981 |
| 4256692 | Membrane oxygenator A membrane device having particular utility as a blood oxygenator is disclosed. The device comprises a housing having an oxygen inlet and outlet, a blood inlet and outlet, and a water inlet and outlet. A plurality of blood modules and water modules are ar... | 03/17/1981 |
| 4247393 | Hemodialysis assist device A hemodialysis assist device including a normally nonflowing aqueous sorbents slurry medium chamber and at least one blood flowthrough passage separated therefrom by a semipermeable membrane of the flat plate, pleated flat plate, hollow fiber or hemicapil... | 01/27/1981 |
| 4234428 | Dual membrane mass transfer device A hemodialysis apparatus is provided in which two blood compartments are formed by two different types of membranes. One membrane is a relatively high flux membrane, with relatively high hydraulic permeability, and the other membrane is a relatively low f... | 11/18/1980 |
| 4228015 | Plasma treatment apparatus A plasmapheresis system in which whole blood is filtered through a microporous membrane to provide a plasma filtrate. The system includes a filter cell assembly having a membrane support member, a treatment membrane spaced from the membrane support member... | 10/14/1980 |
| 4213859 | Dialysis with ion exchange extraction of phosphates An apparatus for purifying blood has a blood compartment and a clearance compartment separated by a semi-permeable membrane. The apparatus includes a device containing a cation exchange resin charged with metal ions whose phosphates are insoluble in water... | 07/22/1980 |
| 4212738 | Artificial kidney A flexible artificial kidney, capable of being worn directly on the body of the patient, and characterized by a flexible hollow retentate chamber of about 3 to 50 cm3 in volume surrounded by a jacketed flexible dialysate chamber of about 300 to... | 07/15/1980 |
| 4202772 | Fluid distribution cell module Rotationally symmetric fluid distribution cell modules combinable to form stacks for the processing of solutions are disclosed. Each module comprises at least one membrane and/or diaphragm and/or electrode and a plate, the latter having a central aperture... | 05/13/1980 |
| 4197206 | Heat sealable ion permeable membranes An ion selective semipermeable membrane such as is used in electrodialysis cell assemblies is fabricated with an unreacted border region of a polymer film which is heat sealable to itself and to other materials of similar composition. Within the border re... | 04/08/1980 |
