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4322232 Filter bag and method for suppressing electrostatic charges  
A fabric filter bag, a method of making such a bag, and apparatus using such bags, in which the bag is a tube of yarn knit into stitches defining a ground and stitches defining terry loop pile...
4321288 Process of making an improved filter media  
A method for preparing an improved filter medium of enhanced electrokinetic capture potential for contaminated liquids having suspended therein electro-negative particles of about 0.1 to 0.7...
4313832 Method for treatment of aqueous solutions with ion exchange fibers  
Ion exchange fibers having a thickness of about 2-200 micrometers and a length more than twice the thickness are mixed as a slurry of cation, anion or mixed cation and anion exchange fibers, with...
4309247 Filter and method of making same  
Filter media sheets comprising particulate retention aid consisting of cellulose pulp of +100 to -100 Canadian Standard Freeness, and method of making the same.
4293378 Enhanced wet strength filter mats to separate particulates from fluids and/or coalesce entrained droplets from gases  
A glass fiber filter mat possessing excellent wet strength which is in the form of a non-woven matrix of glass micro-fibers including polymer micro-bits derived, for example, from a non-brittle...
4251369 Radial design submerged coalescer for separation of liquids  
A coalescer is provided which separates dispersed liquid hydrocarbon phases from continuous liquid aqueous phases by increasing the size of the dispersed phase droplets using a variety of...
4251239 Multi-purpose ceramic element  
A ceramic sponge made from plastic is described. Because of the ease of cutting the plastic in various shapes before converting to ceramic several unique applications are possible. In case of a...
4249918 Fiber bed element and process for removing aerosols from gases  
A fiber bed element and process for removing aerosols from gas streams wherein a bed of fibers is packed to a desired packing density between two foraminous screens. A substantial portion of the...
4238334 Purification of liquids with treated filter aid material and active particulate material  
A method and filter bed for removing impurities from liquids wherein the filter bed comprises a mixture of treated filter aid material and an active particulate material having opposite surface...
4230835 Method of removing polybutadiene gels from solutions  
Solutions of polybutadiene in styrene are filtered through filter media of viscose rayon to remove and/or eliminate gels of sizes greater than about fifty microns.
4225642 Raised and fused fabric filter and process for producing the same  
A fabric filter having a low pressure drop, a high collection efficiency and an excellent cleanability is produced by raising one surface of a woven or knitted fabric comprising thermoplastic...
4212733 Oil-water separation filters  
An oil-water separation filter, which comprises (1) a porous material comprising a sintered polyethylene powder bonded to (2) a fibrous layer having a thickness of about 0.5 to about 5 mm and a...
4210540 Improved filter tube  
A glass-fiber filter tube and process of preparing the filter tube, which filter tube comprises a plurality of randomly disposed, fine glass fibers bonded, at the junction of the fibers, with a...
4193876 Means for suppressing edge leakage in filter presses  
Dry forming the peripheral portion of discs of filter media to suppress edge leakage in filter presses.
4190532 Charged filter aid material and ion exchange bed  
A method for preparing an improved filter material, together with the improved material prepared thereby and an improved method for removing impurities from a liquid. The filter material comprises...
4188197 Particulate filtering  
A filter bag for dry copiers, i.e. copiers which employ particulate toner material. The bag comprises a filter element and a protective cover of porous non-woven material which imparts negligible...
4181514 Stitch knitted filters for high temperature fluids and method of making them  
A dimensionally stable filter structure for high temperature applications and method of making it. The filter structure comprises at least one batt of relatively brittle fibers, known to possess...
4177142 Mixture of oppositely charged filter aid material  
Impurities are removed from a liquid by passing the liquid through an improved filter bed. The filter bed comprises a mixture of oppositely charged particles of filter aid material, the particles...
4160059 Adsorptive nonwoven fabric comprising fused fibers, non-fused fibers and absorptive material and method of making same  
A novel adsorptive nonwoven fabric having good strength as well as good permeability and softness and a method of making the same is disclosed. This product consists essentially of supporting...
4155854 Blood filter  
A blood filter for removing dead blood corpuscles, conglomerations of blood corpuscles and foreign components from the blood comprises dense wadding formed from a plastics monofilament or a bundle...
4132650 Fused fiber blood filter  
A filter element that is particularly suitable for filtration of blood is made by compacting a mixture of fibers that is non-injurious to blood and one component of which has a lower softening...
4119543 Filter medium and method of making same  
A filter medium particularly adapted for use in an oil filter for an internal combustion engine having a water-laid web of fibers, at least 70% of which are cellulose, impregnated with resin in a...
4111813 Hydrocarbon containment and control systems  
A hydrocarbon containment and control system consists of forming a porous woven container having at least one hand grip along one edge seam, at least one opening through a pair of opposed side...
4107050 Filter cartridge  
An oil filter cartridge comprising filter discs and separator discs stacked alternately, the separator discs having inlet and outlet chambers walled in by the contiguous filter discs. The filter...
4104170 Liquid filter having improved extended polypropylene element  
An improved filter of the cartridge type having concentric inner and outer filter elements is disclosed. The elements are formed of non-woven polypropylene fibers. In a preferred embodiment the...
4102785 Inside-to-outside flow filter tube and method of using same  
An improved inside-to-outside flow filter tube and method of manufacturing the tube, which filter tube comprises: a plurality of nonwoven fibers having interstices therebetween to define the...
4098177 Filter paper cup for a percolator and process for making the same  
A percolator having a cylindrical basket concentric with a wand is provided with a filter paper cup having an annular bottom coextensive with the bottom of the basket and having upstanding fluted...
4092250 Filters for the selective collection of metallic ions  
Filters for the selective collection of metallic ions, comprising a water-permeable, thin layer film made from pulp or fiber having the metallic ion collecting groups chemically linked thereto...
4092246 Helically wound blood filter  
A filter for the filtration of blood characterized by a high flow rate with low pressure drop, which filter comprises: a filter housing; an inlet in the housing for the introduction of the blood...
4070287 Polymeric and cellulosic fiber material for removing oil from water  
Material comprising blends of polymeric and cellulosic fibers is disclosed which is particularly suited for removing oil from aqueous mixtures thereof. The fibers are binded into a web or mat-like...
4052316 Composite coalescing filter tube  
The specification discloses a novel composite coalescing filter tube and the method of making the same. In contrast to previous coalescing filters, which had layers of filter material sandwiched...
4033881 Multilayer paper sheet filter cartridges  
Filter tubes or cartridges are provided comprising a plurality of paper filter sheets of differing pore size, arranged in sequence of fluid flow therethrough according to decreasing pore size, and...
4032457 Plural stage filter cartridge wherein at least one stage comprises pulverized particulate material  
A multiple phase filter cartridge is presented wherein the filter has two or more distinctly different fibrous layers with at least one of the fibrous layers containing active particles. The...
4007114 Fibrous filter medium and process  
Improved filter media comprised of negatively charged high surface area fibrous filter material the surface of which is modified by treatment with a melamine-formaldehyde cationic colloid,...
4007113 Particulate filter medium and process  
Improved filter media comprised of negatively charged high surface area particulate filter material the surface of which is modified with a melamine-formaldehyde cationic colloid; processes for...
3995076 Progressive felting of filter elements  
A method for progressively vacuum forming a fibre batt about a porous member whereby, accretion, consolidation and dewatering of the batt occurs under constant vacuum conditions and includes...
3972818 Blood filter using glassy carbon fibers  
A device for treating human blood prior to its return to a living human body. The blood filter employs a bed of fibers between about 1 and 100 microns in diameter, the outer surface of which is...
3972694 Filter tube  
A filter tube, which filter tube comprises a mass of interrelated nonwoven glass fibers, the fibers having a diameter of from about 0.001 to about 10 microns, the fibers bonded at the junctions of...
3880754 Filtering with polyacrylonitrile or polyamide fibers as filter aid  
The invention is related to the field of settling filtration and claims a method of filtering a liquid suspension wherein ground polyacrylonitrile or polyamide fibres having a fibrous structure...
3876544 Electrogalvanic filter cell  
A filter cell for coalescing oil droplets dispersed in a water emulsion, including a perforated tubular core into which the emulsion is injected. A layer of emulsion breaking fibrous metallic...
3865732 Emulsion breaker  
An emulsion breaker featuring a two stage unit, the first stage comprising a resin impregnated fibrous medium including water-resistant, preferentially hydrocarbon-wettable synthetic fibers and...
3812973 COMPOSITION OF MATTER FOR CONTROLLING OIL POLLUTION AND PREFERABLY OIL DISCHARGE IN WATER  
A fibrous composition of matter for controlling oil pollution and preferably oil discharges in water comprises fibers which consist of a mixture of paraffin and polyethylene in a preferred ratio...
3812031 SELECTIVE ADSORPTION OF PHENOLS FROM SOLUTION IN WATER  
3800945 CELL HAVING CATALYTIC ACTION FOR COALESCING OIL DROPLETS  
A cell having catalytic action for coalescing oil droplets dispersed in a water emulsion including a perforated core into which the emulsion is injected, a layer of emulsion breaking fibrous...
3796659 FILTER PAD AND FILTRATION PROCESS  
3765536 BLOOD FILTER CASCADE  
A disposable filter element is provided, capable of passing human blood at a high flow rate and useful in human blood transfusion systems, to remove undesired suspended particles, substantially...
3762564 FILTER AND METHOD OF MANUFACTURE  
Filters for petroleum based liquids and the like are manufactured from heat-treated fabric composed of multicomponent fibers. In general the filter is characterized by light weight, corrosion...
3631987 SWIMMING POOL WATER CLARIFIER  
For use for clarifying the water in a swimming pool; an improved filter characterized by the absence of any replaceable particulate type filter media includes a fibrous porous filter member and a...
3627677 PROCESS OF REMOVING OIL FROM MIXTURES OF OIL AND AQUEOUS MEDIA  
A device for separating water-immiscible oils from a mixture of said oils and an aqueous medium and a process for utilization of the device is described. The device comprises a flexible web and a...
3622446 METHOD OF MAKING A POCKET-TYPE FILTER AND PRODUCT  
An aqueous slurry is prepared which contains no substantial amount of phenol thermoset resin but has up to 30 percent wood pulp; 20-65 percent by weight of either olefin, acrylic, modacrylic, or...