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| Number | Title | Issue Date |
| 4528096 | Device for high gradient magnetic separation A device for high gradient magnetic separation contains, between two pole pieces, an ordered filter structure with parts of magnetic material, which are arranged perpendicular to the direction of a magnetic field and the flow direction of a medium to be f... | 07/09/1985 |
| 4495068 | Fluid filtering device A filter assembly for detachable connection with a housing, comprising an elongated tubular filter element; and a holder assembly for the filter element, which includes a closure plate which engages one end of the filter element and an annular retainer wh... | 01/22/1985 |
| 4476015 | Multiple element fluid separation device The fluid separation device contains a plurality of fluid separation elements, each element having fluid inlet, a treatable fluid chamber, a product fluid chamber, a product fluid outlet connected to the product fluid chamber, and a concentrated fluid out... | 10/09/1984 |
| 4474664 | Ion analysis method and apparatus A permselective ion-exchange membrane, preferably comprising hollow fiber(s) immersed within a regenerant, is used to selectively neutralize or suppress the conductivity of electrolyte in a stream of eluent also containing chromatographically separated io... | 10/02/1984 |
| 4474858 | Aromatic polyimide gas-separating membrane An aromatic polyimide membrane having an excellent gas-separating property comprises (A) a substrate consisting of a porous membrane comprising at least one aromatic polyimide having at least 80 molar % of at least one type of recurring unit of the formul... | 10/02/1984 |
| 4468329 | Hemofiltration system and safety system therefor Apparatus for hemofiltration is disclosed, including a reverse osmosis module for purifying an impure supply of water, a container for adding concentrate thereto and preparing a replacement liquid, a semipermeable hemofiltration membrane filter for filter... | 08/28/1984 |
| 4468319 | Stationary diffuser A method and apparatus for effecting washing, bleaching, or thickening, etcetera of paper pulp or the like utilizes stationary screens, yet provides efficient treatment without significant screen clogging. Pulp introduced into the bottom of a cylindrical ... | 08/28/1984 |
| 4466888 | Suction liquid collection assembly and flexible collecting bag therefor A blood collecting bag is clamped along its peripheral edges between two shells. Inlet and outlet ports are formed in one side edge of the bag and are also clamped between the shells. The shells form a vacuum chamber around the bag with the bag serving as... | 08/21/1984 |
| 4460473 | Membrane distillation method A method and system for desalination of water by so called membrane distillation, wherein saline water is evaporated through the pores of a membrane whose proper operation requires that it not be wetted by either the distilland or distillate. Therefore, l... | 07/17/1984 |
| 4457845 | Recovery of phosphorus from sludge Phosphorus is recovered from the phosphorus sludge formed in the electrothermal production of phosphorus by contacting the sludge with a hydrophobic surface with sufficient force to cause the droplets of phosphorus in the sludge to coalesce and accumulate... | 07/03/1984 |
| 4454042 | Solids-liquids separation device A rotatable drum solids-liquids separation device having bailer scoop means forming a fluid-holding trough attached to and rotatable with the drum which is operable to pick-up fluid in an internal drum sump and during rotation to lift and transport the fl... | 06/12/1984 |
| 4452696 | Reverse-osmosis apparatus for producing fresh water from seawater The invention concerns a fresh-water producing apparatus to be immersed in a marine medium and of the type comprising at least one reverse-osmosis selective semi-permeable membrane. This apparatus comprises three stages: a fresh-water stage consisting of ... | 06/05/1984 |
| 4451370 | Membrane separation element The present invention provides a membrane separation element comprising a pair of corrugated semipermeable membranes each defining a plurality of parallel passages for the fluid to be treated on active surface side thereof, and a plurality of parallel pas... | 05/29/1984 |
| 4451369 | Fluid separation apparatus A hollow fiber membrane-type fluid separation apparatus useful for selective separation of fluids in various techniques such as gas permeation, liquid permeation, dialysis, ultrafiltration, reverse osmosis, etc., which comprises at least one pair of unit ... | 05/29/1984 |
| 4450079 | Cassette for providing a controlled flow of fluid Apparatus is provided for obtaining a controlled flow of fluid from a source to a patient. The apparatus includes a plunger movable vertically in a chamber and made from resilient material and having a pair of vertically spaced lands. The chamber defines ... | 05/22/1984 |
| 4450076 | Small-sample dialyzer A small-sample dialyzer having dialysis cells comprising a plastic tube covered on one end with a dialysis membrane, the dialysis cells being mounted in a cell holder positioned to place the membrane on the cells in contact with the liquid in the containe... | 05/22/1984 |
| 4447220 | Method and apparatus for separating blood components A cup (2) of the centrifuge has two chambers (1,3). In the first chamber is placed the first blood bag (6) filled with blood fluid, which is inserted into the chamber together with an elastically deformable inset cup (4). A pressure pad (9) bears at one e... | 05/08/1984 |
| 4447326 | 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 longitudinally extending spacer plates alternating between the folds of a folded semi-permeable membrane in which channel... | 05/08/1984 |
| 4446024 | Hollow filament product A three-dimensional network of rigid, porous hollow filament of inorganic material is provided which has high flux capability in treating fluid for separation purposes. The network is made by coating a continuous combustible core with a paste of the inorg... | 05/01/1984 |
| 4445885 | Insulin releasing supplier An insulin supplier, which can be effectively used for the treatment of diabetic patients, comprising a casing and at least one tubular structure composed of a polymeric semipermeable membrane to provide an internal chamber inside of the tubular membrane ... | 05/01/1984 |
| 4444662 | Microporous laminate A laminate formed by the solvent casting of a two phase siloxane-polyarylene polyether block copolymer onto a suitable microporous substrate such as a microporous polypropylene film, to produce a gas permeable and blood compatible membrane having sufficie... | 04/24/1984 |
| 4443333 | Portable dialysis system and pump therefor A system for dialyzing blood in which blood is passed through an exchange station to transfer toxic material across a semipermeable membrane to a dialyzate. Pump means are disclosed for simultaneously pumping a plurality of liquids through the system at d... | 04/17/1984 |
| 4440641 | Hollow filament module and method and apparatus for production of the same A hollow filament module comprising an annular package of hollow filaments having a longitudinal axis, an axially extending flow channel of a hardened mass, and an outer mantle likewise of a hardened mass coaxial with said flow channel and radially outwar... | 04/03/1984 |
| 4439322 | Polymethyl methacrylate membrane A membrane for microfiltration, ultrafiltration or dialysis comprises a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer having sulfonate groups, and a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer ... | 03/27/1984 |
| 4438075 | Process and apparatus for the production and maintenance of a fluidized layer in heterogeneous systems A process for the production and maintenance of a fluidized layer in a heterogeneous system includes the steps of: (1) setting a heterogeneous mass stream having a liquid as the continuous phase and a solid and/or gas as the disperse phase into fluidized motio... | 03/20/1984 |
| 4437990 | Semipermeable membrane mass transfer apparatus having slotted support members A mass transfer apparatus for use in hemodialysis and ultrafiltration wherein a semi-permeable membrane is folded to form a stack of accordion pleats and is arranged within a ported housing to form two separate fluid chambers for blood and dialysate. A pl... | 03/20/1984 |
| 4437994 | Extraction of metal ions from aqueous solution A process of extraction of ions of metals from an aqueous feed solution and liberation of such in an aqueous product solution wherein the feed solution is circulated through the lumens of hollow fibers, the walls of said fibers consisting of a microporous... | 03/20/1984 |
| 4436620 | Integral hydraulic circuit for hemodialysis apparatus A one-piece hydraulic circuit is provided for use with a blood dialyzer for performing functions currently performed with a multiplicity of blood inlet and outlet sets and related items comprising flexible tubing and the like.... | 03/13/1984 |
| 4436625 | Method for purification of cresidine sulfonic acid by solvent extraction A method for removing residual cresidine from impure p-cresidine sulfonic acid which impure p-cresidine sulfonic acid contains from above about two parts per billion to about 1500 parts per million of cresidine. The method comprises contacting an aqueous ... | 03/13/1984 |
| 4435289 | Series ultrafiltration with pressurized permeate Process and apparatus for providing separation of solutes, colloidal particles or suspended matter by ultrafiltration wherein increased cost efficiency and reduced energy requirements are realized by series flow configuration, utilizing increased operatin... | 03/06/1984 |
| 4434056 | Multi-cylinder reverse osmosis apparatus and method Multi-cylinder reverse osmosis pump having at least three cylinders, each feed cylinder having a displacer rod carrying a displacer to divide the cylinder into respective pumping and expansion chambers. Each displacer rod has an expansion chamber valve po... | 02/28/1984 |
| 4432876 | Reverse osmosis apparatus and method incorporating external fluid exchange Reverse osmosis pump using a fluid volume exchange structure interconnecting pumping and expansion chambers of feed cylinder externally of feed cylinder. This structure permits exchange of volume between pumping and expansion chambers following initiation... | 02/21/1984 |
| 4432875 | Semi-permeable membranes and processes for making the same Semi-permeable, porous membranes useful as filtration and reverse osmosis membranes can have or can consist of a porous layer of a hydrophobic polymer rendered hydrophilic at its surface by the presence of a surfactant containing both hydrophobic and hydr... | 02/21/1984 |
| 4431534 | Liquid-liquid separation apparatus Apparatus is disclosed for separating a multiphase liquid mixture of lighter and heavier liquids which includes a caisson into which the liquid mixture is introduced. A surge plate extends horizontally across the interior of the caisson dividing it into u... | 02/14/1984 |
| 4431539 | Semipermeable membrane mass transfer apparatus and method for making same The present invention relates to mass transfer apparatus e.g., artificial kidney in which a semipermeable membrane is folded or pleated between top and bottom rectangular plates. Support members are disposed within each pleat on one side only of the membr... | 02/14/1984 |
| 4430301 | Apparatus for removing a sample of at least one phase from a moving mixed phase Apparatus for extracting a dispersed phase from a moving mixed phase which ontains two substantially mutually insoluble liquids of different densities which form a dispersed phase and a continuous phase. The apparatus includes a pipe passing through the wa... | 02/07/1984 |
| 4430098 | Apparatus for degassing hemodialysis liquid and the like A gas-containing hemodialysis liquid is introduced into a helical coil of tubing formed from a hydrophobic material. Axial flow through the tubing is prevented and the hemodialysis liquid is pressure forced through the hydrophobic material, to free the ga... | 02/07/1984 |
| 4430213 | Ultrafiltration unit An ultrafiltration unit for the separation of the colloidal or very fine solid material by filtration through microporous or semipermeable mediums. The unit comprises a filter housing formed by an upper part and a lower part airtightly connected together ... | 02/07/1984 |
| 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 |
| 4430227 | Method of concentrating aqueous solutions Method of concentrating aqueous solutions of non-volatile, ionic solutes by extracting water from the solution by means of a polar organic liquid (or a solution of a polar organic liquid and a non-polar organic liquid) at an elevated temperature and cooli... | 02/07/1984 |
