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| Number | Title | Issue Date |
| 4777137 | Method and apparatus for microbiological testing of liquids Method and apparatus for the microbiological testing of liquids to identify and count living microorganisms contained therein includes a tubular sleeve for collecting the liquid sample to which there is attached at one end a microporous membrane filter. E... | 10/11/1988 |
| 4761230 | Small volume tangential flow filtration apparatus A filter system particularly useful with small sample volumes includes first and second housing sections with a flow channel extending therebetween. A membrane filter forms one boundary of the flow channel. A pair of reservoirs, one for feed and the other... | 08/02/1988 |
| 4756835 | Permeable membranes having high flux-density and low fouling-propensity A permeable membrane system comprised of at least two sheets, at least one of the two sheets being a grooved permeable membrane having regularly spaced grooves on at least one surface, the grooves having a predetermined spacing factor, the grooved permeab... | 07/12/1988 |
| 4755299 | Multi-layer membrane and the use thereof for the separation of liquid mixtures according to the pervaporation process A multi-layer membrane having a porous backing layer of polyacrylonitrile, polysulfone or the like, and an active separating layer of polyvinyl alcohol or cellulose acetate. The membrane is particularly suitable for the separation of water-alcohol mixture... | 07/05/1988 |
| 4752305 | Device and method for separating individual fluids from a mixture of fluids A device and method is disclosed for separating individual fluids (particularly gases) from a stream that contains more than one fluid. The separator device is made up of a bundle of hollow fibers fastened into a resin tubesheet at each end of the bundle.... | 06/21/1988 |
| 4749483 | Membrane separation arrangement and method of producing a plate module thereof A membrane separation arrangement includes a plurality of plate modules adjacently arranged in a housing, the plate modules being formed by two separation membranes each, which are interconnected at their rim regions so as to be tight all around, inner sp... | 06/07/1988 |
| 4749476 | Apparatus for filtering pressure sensitive substances out of liquid suspension For the separation of suspensions in the form of liquid solid component mixtures with the aid of porous filter membranes or for the separation of suspensions free of solid components into the liquid components with the aid of solution diffusion membranes,... | 06/07/1988 |
| 4749551 | Hollow-fiber oxygenators for blood In a hollow-fiber oxygenator consisting of a container containing a plurality of fibers joined into a bundle and open at their ends to allow the passage into them of a first fluid (blood) and over the outside of which flows a second fluid (oxygen-carrying... | 06/07/1988 |
| 4747946 | Tubular membrane ultrafiltration module An improved tubular membrane filtration module including an outer cylinder and a plurality of water permeable non-woven fabric pipes formed on the inside thereof, the non-woven fabric pipes being inserted into the outer cylinder in a closely bundled state... | 05/31/1988 |
| 4738782 | Method and apparatus for aseptic filtration A nutrient solution of a microorganism to be supplied to a fermentor or a culture broth in the fermentor is aseptically filtered by a porous filter medium made of polytetrafluoroethylene polymer and having properties impervious to microorganism, resistant... | 04/19/1988 |
| 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 |
| 4689306 | Device for sterile sampling from a fermenter A device of the present invention for sterile sampling of culture liquor from a fermenter comprises a sampler (1) positioned on the fermenter (3) in the zone of stirring the culture liquor and a sterile sample collector (11). The sampler (1) is fashioned ... | 08/25/1987 |
| 4667504 | Flow through device for determination of the penetration rate of chemicals across biological membranes in vitro An apparatus for determining in vitro the penetration rate of chemicals across a biological membrane. The apparatus comprises two housings, one holding a reservoir of test chemical, and the other providing a chamber for flowing receptor solution across a ... | 05/26/1987 |
| 4666603 | Semi-permeable membrane liquid filtration apparatus including elliptical blocking means An apparatus for the ultra or hyperfiltration of liquids to form a permeate fraction and a concentrate fraction includes a stack of membranes and membrane support plates. The stack includes two longitudinally extending main flow passages connected with a ... | 05/19/1987 |
| 4640777 | Membrane device for sterility testing Apparatus for testing the sterility of fluids consisting of at least one hermetically sealed test container formed from a top portion, a bottom portion, a filter holder and a test filter. The filter is formed entirely from a hydrophilic material. The filt... | 02/03/1987 |
| 4640776 | Plasmapheresis filtration module having pressure balancing and sealing means A plasmapheresis filtration module having stacked grooved plates interleaved with membranes, enclosed in a unitary, flexible, impermeable envelope, sealing being effected by pressing the membranes between blood flow channels and a sealing surface on a pla... | 02/03/1987 |
| 4639316 | Automatic liquid component separator A device in the form of a sealed transparent tube comprised of glass, for example, is provided for separating the fraction containing cells and cell free fraction of a liquid, such as blood, automatically upon introduction into the device, and without the... | 01/27/1987 |
| 4639317 | Plasmapheresis filtration module having improved sealing means A plasmapheresis filtration module having stacked grooved plates interleaved with membranes, enclosed in a unitary, flexible, impermeable envelope, sealing being effected by pressing the membranes between blood flow channels and a sealing surface on a pla... | 01/27/1987 |
| 4636312 | Plasmapheresis filtration module having improved end plate A plasmapheresis filtration module having stacked grooved plates interleaved with membrane filters, enclosed in a unitary, flexible, impermeable envelope, sealing being effected by pressing the membranes between blood flow channels and a sealing surface o... | 01/13/1987 |
| 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 |
| 4631130 | Plasma separator A filter membrane housed in a casing is a microporous membrane manufactured by the phase separation method and having a pore size of 0.1 to 0.8μ, preferably 0.2 to 0.6μ, and a thickness of 100 to 300μ. At least one membrane unit comprising of such a me... | 12/23/1986 |
| 4614585 | Frangible bonded disposable filtration unit with recoverable filter A disposable filtration unit having a breakaway reservoir to facilitate recovery of the filter membrane.... | 09/30/1986 |
| 4600507 | Filter device for liquids A filter device capable of simultaneously effecting centrifugal separation and filtration comprises a hollow main body closed at one end thereof and adapted for effective use in a centrifuge, at least one filter medium disposed inside the hollow main body... | 07/15/1986 |
| 4599170 | Filtration apparatus A filter device including a unitary cell for receiving a fluid to be filtered and comprising a receptacle portion with an open end; a base portion defining an outlet and bonded to and closing an opposite end of the receptacle portion; and a filter membran... | 07/08/1986 |
| 4597868 | Body fluid filter device A body fluid filter device is formed by enclosing liquid-tightly and slidably with a filter device case a body fluid filter membrane, an elastic body fluid flow path regulation plate disposed on one surface of the filter membrane and provided with a plura... | 07/01/1986 |
| 4594884 | Diffusion measuring device A device for measuring diffusion, particularly adaptable to measuring diffusion of drugs, is described.... | 06/17/1986 |
| 4581141 | Dialysis material and method for removing uremic substances Compositions for removing uremic substances during hemodialysis comprising an aqueous slurry containing charcoal, a highly calcium-loaded zeolite cation exchanger, purified urease (which may be bound to a portion of the zeolite, a suspending agent, and op... | 04/08/1986 |
| 4578191 | Bio-artificial ultrafiltration pancreas The bio-artifical pancreas comprises islands of Langerhans contained in a volume defined by two approximately parallel ultrafiltration membranes, able to be formed by two successive portions of the same flat membrane or the same hollow fiber. The surfaces... | 03/25/1986 |
| 4556488 | Apparatus for filtering and separating liquid and gaseous media For filtering and separating liquid and gaseous media, particularly for water desalinization by reverse osmosis, modules filled with membrane cushions are employed that are open at two opposite sides and are inundated within an outer housing by an enterin... | 12/03/1985 |
| 4545862 | Desalination device and process A membrane distillation module is provided with a thin, flexible microporous membrane positioned against an impermeable condensor sheet that is stiffer in bending than the membrane. Distillate vapor diffuses through the membrane from the hot feed flowing ... | 10/08/1985 |
| 4526690 | Apparatus for nucleic acid quantification A multiwell apparatus for the assay of microliter quantities of body fluids is provided which prevents fluid loss by lateral migration or gravity flow through a microporous membrane or ultrafilter. A sample is passed through a membrane to which an antibod... | 07/02/1985 |
| 4525276 | Apparatus for separation of immiscible liquids The inventive liquid separator of laboratory use can overcome the problems in the conventional separatory funnels used for liquid-liquid phase separation. The inventive apparatus comprises (a) a first bottle-like vessel with a mouth, (b) a second bottle-l... | 06/25/1985 |
| 4501663 | Filter cartridges and methods and components for making them Novel membrane filter units are disclosed which are adapted for stacking and bonding into integral, disposable cartridges, optionally including an integral disposable housing. The units comprise a thin plastic support having flat membranes permanently bon... | 02/26/1985 |
| 4485014 | Filter assembly for connecting intermediate an epidural cannula and a syringe An epidural filter for connecting intermediate a syringe and an epidural cannula has a two-part housing formed with an inlet and an outlet. Within the housing a filter membrane is supported, parallel with the direction of fluid flow through the filter, by... | 11/27/1984 |
| 4477347 | Portable water purifier A portable water purifier having a filter housing adapted to contain a replaceable filter assembly to which filter housing is releasably attached an unfiltered water chamber with a pressurizing pump located on the top thereof. A cup member is releasably a... | 10/16/1984 |
| 4457846 | Liquid chromatography methods and devices In the analysis of substances by liquid chromatography, samples to be analyzed are introduced into the chromatography column by being loaded into a fluid permeable section in a cartridge, placing the sample loaded section over the inlet end of the column ... | 07/03/1984 |
| 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 |
| 4415447 | Separatory apparatus comprising means for anchoring a semi-permeable membrane to a support member Separatory, e.g., ultrafiltration apparatus including a plurality of semi-permeable membranes and a plurality of ridge ribbed support members therefor, is provided with means for anchoring said membranes to and between successive supports.... | 11/15/1983 |
| 4390424 | Device for diffusing matter between two fluids via semi-permeable diaphragms Apparatus for diffusing matter between two fluids is disclosed, including a stacked configuration of alternating spacing plates and pairs of semi-permeable membranes, the spacing plates including flow passages for each of the fluids so that they can be pa... | 06/28/1983 |