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4859340 Filter sheet  
A filter media sheet comprising fine particulate and a self-bonding matrix of cellulose fiber, the surfaces of at least one of which are modified with a polyamido-polyamine epichlorhydrin cationic...
4853130 Method for purifying liquids  
A process for the separation of radioisotopes and stable isotopes and other deleterious materials from radioactive waste and other liquids, wherein the waste stream is passed through a...
4851273 Method and apparatus for degreasing fried foods  
An arrangement is provided for use in the preparation of food materials, to substantially de-oil or de-grease same. The preferred arrangement comprises a two component structure having an outer...
4840838 High temperature filter felt  
A high temperature filter felt comprising a scrim and an entangled batt. The machine-direction component of the scrim is made up of intermeshed continuous filament yarns which are 40 to 75% glass...
4816224 Device for separating plasma or serum from whole blood and analyzing the same  
A device for separating plasma or serum from whole blood and analyzing the same, wherein the device includes a layer of glass fibers with an average diameter of from 0.2 to 5 microns and having a...
4810394 Process and apparatus for removing solid material including blood cells from whole blood  
An instrument for separation of liquid from solid material comprising: a volume filtration layer having a void volume of not less than 90% which is composed of fibrous material; and a...
4802985 Porous water-treating material  
A porous water-treating material comprising cut porous strads each comprising a resinous matrix material which consists essentially of a thermoplastic polymer material or a mixture thereof with an...
4793923 Gradient density filter medium  
A filter medium for filtration of a fluid to flow therethrough from an upstream side to a downstream side thereof, said filter medium comprising a substrate having a density gradient wherein the...
4789479 Packing for chromatography  
A packing for chromatography, comprising a granular adsorbent and a fibrous material which are substantially homogeneously mixed with each other.
4765915 Porous filter media and membrane support means  
A method for filtering liquid or gaseous materials where the filtration is conducted with a porous filter media prepared from an aqueous wet-laid, lofted fiber-reinforced composite sheet, the...
4759782 Coalescing filter for removal of liquid aerosols from gaseous streams  
A coalescing filter capable of removing liquid aerosols (such as water and oil) from gaseous streams with high efficiency. The filter comprises three layers, (a) an intermediate fibrous layer...
4759847 Filter for the sorption of a petroleum product from a liquid  
A filter including a flexible mesh having feathers secured thereto is disclosed for separating out oil from an oily liquid. The feathers sorb the oil. In a first embodiment of the filter the...
4753730 Filter for separating substances having lipophilic and/or oleophilic and/or apolar properties from different liquids, gases and vapors  
A filter for separating substances having lipophilic and/or oleophilic and/or apolar properties, such as fats, oils, substituted or unsubstituted hydrocarbons, from different liquids, gases and...
4749479 Apparatus for separation of liquids and solids using fabrics  
Liquids can be separated from the solids contained in slurries, sludges, etc. by forcing a liquid-permeable fabric, downward into the slurry so that solid materials are retained below the...
4747955 Purification of liquids with treated polyester fibers  
A method for removing impurities from a liquid utilizing a filter bed having polyester fibers which have been treated with a hot caustic solution to increase the hydrophilicity of the polyester...
4734208 Charge-modified microfiber filter sheets  
Filter media comprised of charge modified, resin coated inorganic microfibers are prepared by mixing inorganic microfibers with an aqueous solution of a water soluble, noncolloidal cationic...
4726901 Cylindrical fibrous structures with graded pore size  
Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each...
4710402 Method of making filter paper  
A flat annular disc filter paper has a plurality of randomly oriented fibers at its surface. The paper is impregnated with a phenolic resin so as to resist compression of the disc and swelling of...
4710298 Auxiliary for dewatering of sludge  
Dewatering of sludge is accomplished by adding an organic fibrous material having the bulk specific gravity increased by being pressed or being wetted with water and a high molecular weight...
4708792 Filter medium  
A filter medium comprising first and second filter mediums joined together. The first filter medium provides relatively large voids and has high porosity, while the second filter medium provides...
4701267 Method for removing leukocytes  
A filter unit for removing leukocytes from a leukocyte-containing suspension, comprising a container provided with at least one inlet conduit means and at least one outlet conduit means, the...
4696742 Active carbon fibers and filter adsorption unit for water purification comprising said fibers  
Active carbon fibers derived from acrylic fibers and having a BET specific surface area (SA) of 800 to 2,000 m2 /g, a pore volume (Vp) to (SA) ratio, i.e., (Vp)/(SA), of from 5×10-4 to 14.5×10-4,...
4693823 Liquid filter  
A liquid filtered cartridge comprising a hollow cylindrical body with top and bottom bulkheads closing top and bottom ends, respectively, thereof. The body has a plurality of peripheral input...
4687697 Composite having improved transverse structural integrity and flexibility for use in high temperature environments  
A composite is provided which has improved transverse structural integrity and flexibility and suitable for use in high temperature and high stress environments. The composite has randomly...
4680221 Chemical-resistant filter material  
Disclosed is a chemical resistant filter material made of a fibrous structure, the fiber surface of which is coated with at least one inorganic oxide selected from oxides of silicon, aluminum and...
4661255 Multilayer filter material, process for its manufacture and the use thereof  
A multilayer filter material is described which comprises a coarse and a fine filter layer, while the individual filter layers contain a share of natural fibres and are interconnected with each...
4650506 Multi-layered microfiltration medium  
A multilayered microfiltration medium exhibiting high particle capture efficiency and minimal flow restriction having a base substrate layer, a fine fiber filtration or efficiency layer deposited...
4620932 Submicronic hydrophilic filter media  
The present invention is a one-piece construction sub-micronic filter media capable of high volume filtration of sub-micronic sized particulate from fluids without the addition of wetting agents,...
4610905 Yarn having specific properties  
Textile flat-shaped structures exhibiting specific properties, such as flame-resistance or adsorbing capacity, are required for technical purposes, said structures being at the same time...
4596660 Fibrous media containing millimicron-sized particulates  
A self supporting fibrous matrix containing immobilized therein at least about 5% by weight of micro-particulate, with an average diameter less than 1 micron, preferably fumed silica, or alumina,...
4594158 Filter aid materials bearing anion exchange resins  
Conventional filter aid materials are treated with anion exchange resin materials having particle diameters smaller than 1 micrometer to produce an improved filter aid material bearing a fixed...
4576716 Method of producing water treatment medium and medium produced thereby  
A method of producing a water treatment medium comprises the steps of dispersing staple fibers in a dispersive medium liquid, and causing the fibers to flow and vibrate in the liquid so that the...
4569756 Water treatment system  
A water treatment system for removing turbidity-causing impurities from water which involves contacting water containing such impurities with a relatively small amount of filter aid material,...
4531957 Filtering material and filtration apparatus employing the filtering material  
Filtering material and filtration apparatus employing the filtering material. The filtering material includes a perforated laminate of a plastic sheeting and a metalized coating adhesively...
4505823 Filtering device for treating contaminated aqueous solutions  
Filter element package, method for preparing and method of using the same for treating contaminated aqueous solutions, in which the filter element is in the form of a mat consisting essentially of...
4504290 Odor filter media  
An improved filter construction for odor adsorption adapted to fit into a frame provided with front and rear support faces. The filter media consists of one or more sheets of non-woven material...
4455237 High bulk pulp, filter media utilizing such pulp, related processes  
The disclosure related in part to a novel and highly superior high bulk pulp formed of lignin-containing fibers, and to process conditions for manufacture of the pulp. The process involves...
4451362 Filling for percolating filters for biological waste water purification  
A filling for a percolating filter for biological purification of waste water includes a plurality of flexible, irregularly touching, randomly arranged plastic strips up to 8 cm in width and...
4443334 Oil reclamation device  
An oil reclamation device includes a housing that has an interior divided into at least two areas by a somewhat upright, generally conical vaporization plate. The area which is above the plate is...
4431542 Filter and method of producing the same  
The invention deals with a filter for gas or liquid separation. The filter consists of a continuous fiber tissue within which a granular or powder formed (particle formed) activated material is...
4418432 Drain filter having filamentary surface irregularities to entangle hair and debris  
A new article of flexible and springy though rigid enough water impervious material provided with spikes or bristles or open web of crinkled filaments or rough indented openings to be installed...
4416782 Method for separating oil from aqueous or solvent dispersions  
For separating oil from aqueous or solvent dispersions the dispersion is passed through a porous flat-shaped textile article which comprises at least partly of oleophilic fibres each having a...
4402830 Corrugated filter element with external spiral tape support  
A corrugated cylindrical filter element is provided having an external spiral tape support, comprising a corrugated filter sheet material in the form of a cylinder having an end cap at each end of...
4395332 Adsorption and filtration mat for liquids  
Disclosed are filter mats composed of a wet laid, porous, non-woven matrix having randomly arranged, irregularly intersecting and overlapping cellulose fibers intermixed as a cobeat (i.e. beaten...
4388192 Process and a device for purifying water  
Water may be purified by passage through a filter of thickness 2 cm to 1 m composed from fibers obtained from a melt of composition about 80% diabase mineral and about 20% lime, at least 90% of...
4361619 Filter of poly(tetrafluoroethylene) and glass fibers  
65-99 percent by weight poly(tetrafluoroethylene) fibers and 1-35 percent by weight glass fibers are combined in an intimate blend suitable for the preparation of filter felts having reduced...
4361486 Filter media, method for oxidizing and removing soluble iron, method for removing and inactivating microorganisms, and particulate filter aid  
A filter media is provided which comprises an amount of particulate immobilized in a substantially inert porous matrix. A least a portion of the particulate surface has thereon a divalent metal...
4360433 Filter elements for gas or liquid  
A self-supporting tubular fibrous filter element consists of elongated fibers compacted in a direction parallel to the central axis of said tubular element to have a substantially constant density...
4329383 Non-thrombogenic material comprising substrate which has been reacted with heparin  
Non-thrombogenic material comprising a base polymer treated with heparin, the improvement in which the heparin is covalently bonded with the base polymer through only one acetal bond or hemiacetal...
4329226 Oil reconditioning system  
An industrial oil reconditioning system forces dirty oil through a three-stage filter which usually includes a first stage comprising a blend of relatively flexible fibers and rigid fibers, a...