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5529838 Wool filter for dust-proof mask comprising a nonwoven fabric of random wool fibers and slit film fibers  
A wool filter for a dust-proof mask is disclosed, in which wool fibers are mixed with chemical resin film slitting yarns so as to manufacture a non-woven fabric, thereby doubling the electrostatic...
5529609 Air cleaner having a three dimensional visco-elastic matrix of material  
An air cleaner comprises a cleaning element having a three-dimensional visco-elastic matrix of material for adsorbing airborne particulate matter and for absorbing volatile liquids and a variety...
5527569 Conductive filter laminate  
The present invention is an improved electrically conductive filter media particularly suitable for use in applications where static electricity must be dissipated. The filter media of the present...
5527429 Method of preparing paper for filter bags, apparatus for implementing the method, and product obtained thereby  
A method of preparing paper for filter bags, the method of the type comprising a step during which a non-woven paper is prepared comprising two superposed layers, namely a layer based on synthetic...
5522910 End-line compressed air moisture filter  
The invention is directed to a portable and easy to use end-line filter designed to be utilized between a source of compressed air such as a pneumatic hose with an air chuck on its terminal end,...
RE35236 Adjustable air filter  
An adjustable air filter for use in heating, ventilating, cooling, and forced air systems. The air filter includes a media for filtering air and adapted to be cut with scissors, and a frame...
5514197 Air filter device for an air-conditioning apparatus  
An air filter device for an air-conditioning apparatus includes a mounting frame unit, an axle mounted rotatably to the mounting frame unit, and a plurality of blade-like frames mounted axially on...
RE35206 Post-treatment of nonwoven webs  
A method for post-treating a precursor nonwoven web including consolidating the web laterally and thereby reducing the maximum pore size measure of the web. The resultant nonwoven web is also...
5505753 Aircraft pneumatic air filter  
An aircraft pneumatic air filter includes a pair of cup-shaped interconnected cover having respective inflow and outflow nozzles and a filter cartridge maintained in the cavity defined...
5496507 Method of charging electret filter media  
A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive...
5486411 Electrically charged, consolidated non-woven webs  
A consolidated non-woven web made by post-treating a precursor nonwoven web including consolidating the web laterally by drawing, thereby reducing the maximum pore size measure of the web and...
5480538 Apparatus for treating waste water oxidation ponds to abate malodors  
A process and an apparatus for treating waste water in oxidations ponds, oxidation ditches, or other bodies of water in a waste water treatment facility to abate the malodors caused by the...
5478377 Filter for a respiratory device  
Disclosed is a filter for a reduced threat chemical/biological protective spiratory device which includes a housing having an air intake orifice and an air exit orifice and which encloses a...
5478372 High temperature, chemical resistant laminate for filtration systems  
A self-supporting laminate formed from an expanded polytetrafluoroethylene membrane material and a coated metal mesh material is described that is self-supporting and can be formed into a pleated...
5472481 Oily mist resistant electret filter media  
An oily mist resistant electret filter media is provided. The filter media includes polypropylene electret fibers and a melt processable fluorochemical additive, the additive having a melting...
5470659 Hollow fibers  
A bundle of hollow fibers of uniform diameter, particularly for use in dialysis is formed of a plurality of parallel hollow fibres at least a part of which, prior to the formation of the bundle,...
5468536 Sorbent articles  
A microfibrous sorbent article is provided. The microfibrous sorbent article comprises an elongate boom having a substantially oval cross-section. The boom is formed of multiple adjacent...
5458784 Removal of contaminants from aqueous and gaseous streams using graphic filaments  
A process for removing contaminants, particularly organic and metal contaminants, from aqueous and gaseous streams by contacting a contaminated stream with graphitic carbon filaments (nanofibers)...
5437900 Surface modified porous expanded polytetrafluoroethylene and process for making  
Porous expanded polytetrafluoroethylene material having a microstructure of nodes interconnected by fibrils wherein a surface of the material has been modified to have increased hydrophobicity as...
5436054 Electret Filter  
An electret filter formed by laminating a plurality of network electret film-split fiber fleeces having a different mesh size. It exhibits a high collecting efficiency with a very small pressure...
5431706 Disposable particulate filter  
A gas permeable filter element formed solely from filter material defines a substantially cylindrical inner filter element and a substantially cylindrical outer filter element joined together by...
5429864 High efficiency filter fabric for hot gas filtration  
A nonwoven aramid staple fiber batt is needled into a woven aramid scrim which is overlayed with a thin mat of heat resistant microfiber to give marked improvement in hot gas filtration.
5427597 Layered air filter medium having improved efficiency and pleatability  
A filter and method for making the filter. The filter has a first filter layer of high efficiency melt blown filter medium having an efficiency of pre-HEPA to HEPA, and a second filter layer of...
5423893 Plastic filter, its injection molding die and producing method  
A meshed plastic filter of a narrow-pitch net with a net structure and a frame structure formed in either a square or a circular overall shape into a plastic injection molded unitary body includes...
5413936 Rotary biofilter  
A cylindrical vessel having a horizontal, longitudinal axis of rotation is filled with biofilter material and receives gases through a perforated dispersion pipe located along the axis. Humidified...
5409513 Apparatus for removing caprolactam emissions  
Disclosed is an apparatus for removing caprolactam emissions from a broad variety of sources, especially from caprolactam polymerization operations and thermoplastic polycaprolactam processing...
5395411 Filter for air cleaning  
An air cleaning filter comprising a layer (A) of water-repellent fiber and a layer (B) in which fiber bundles comprising aggregates of water-absorbent fibers are arranged. Layer (B) has an air...
5393601 Non-woven solidified by means of a melt binder  
A non-woven solidified by means of a melt binder is described, which is based on supporting aramid fibers and on binding fibers made of thermoplastic aramids whose melting point is below the...
5368734 Triboelectric filtration material  
An electrically charged air filter which comprises a blend of clean expanded porous polytetrafluoroethylene fibers and clean polyamide fibers.
5360654 Sorbent articles  
A microfibrous sorbent article is provided. The microfibrous sorbent article comprises an elongate boom having a substantially oval cross-section. The boom is formed of multiple adjacent...
5350435 Soil fertilization method  
The present invention provides a soil fertilization method which includes a process for producing a fertilyzer by-product from an ammonia filtering media. The method includes the steps of...
5346566 Water barrier of water-swellable clay or other abrasive material sandwiched between interconnected layers of flexible fabric sewn or needled together using a lubricant and/or a liquid adhesive  
A multi-layer article of manufacture includes an intermediate layer of a water-swellable colloidal clay, such as bentonite, sandwiched between two layers of flexible sheet or fabric material...
5344702 Coated fibers  
Fibers coated with thin polymeric films are disclosed and claimed. In a preferred embodiment, microporous fibers are coated with a pre-cast polymeric film having a thickness of about 200 to about...
5342423 Air filter for an HVAC system and method of manufacturing same  
An air filter apparatus for an HVAC system having a frame with a channel area formed therein and having legs extending into the channel area, and a filter material having a portion received within...
5338340 Filter and method of making same  
An odor-removing filter approaching the carbon-particle loading of a filled filter may be formed by spraying or roll coating the adhesive against one or more faces of a porous, fibrous,...
5336286 High efficiency air filtration media  
A high efficiency air filtration media comprises: about 5 to about 20% by weight of fibrids; about 5 to about 20% by weight of a binder; and about 60 to about 90% by weight of staple fiber. The...
5324579 Static dissipative nonwoven textile material  
A nonwoven textile material useful in dissipating static electric charges containing an electrically conductive polytetrafluoroethylene fiber. An amount of a synthetic fiber may be intermixed with...
5320655 Incineratable holding frame for filter bags, and method of making the frame  
To permit environmentally safe incineration of a filter bag together with its holding frame, and without requiring removal of the holding frame prior to incineration, the holding frame is made of...
5320891 Particle barrier nonwoven material  
Disclosed is a method of producing a nonwoven material having improved resistance to penetration by particles. The method includes the steps of heating at least one nonwoven web containing...
5318608 Carburetor air filter  
A supplemental cylindrical air cleaner or filter is provided for the inlet snorkel of a conventional automotive air cleaner housing and the supplemental air filter or cleaner incorporates a molded...
5304227 Electret filters  
An electret filter made of a resin whose angle of contact upon wetting with pure water is no smaller than 95 degrees, as well as an electret filter made of a resin whose angle of contact upon...
5298046 Diesel particulate filter element and filter  
An efficient, economical, compact diesel particulate filter element in the form of a spiral roll. The filtering element is useful as a filtering element in a diesel particulate filter.
5290345 Refillable gas adsorption bed assembly and counterflow adsorber module  
The present invention pertains to a refillable gas adsorption bed assembly having a box-like, generally rectangular frame The frame has a pair of oppositely disposed side members and a pair of...
5290502 Method of making a rigidized fiber filter element  
A rigidized fiber filter element is produced from a precursor fiber web. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures...
5288299 Exhaust gas treating apparatus  
A compact exhaust gas treating apparatus which is improved in the bag filter performance in order to reduce the amount of dioxin contained in exhaust gas discharged from municipal refuse...
5284704 Non-woven textile articles comprising bicomponent fibers and method of manufacture  
Fibers comprising 10 to 100% of bicomponent fibers, composed of a core polymer covered by a sheath polymer, are heated to a temperature between the softening point and the melting point of the...
5283106 Nonwoven material of two or more layers, in particular with long-term filter properties and manufacture thereof  
There is disclosed a multilayered filter material comprising nonwovens made of fibers or filaments of identical or different polymers, said filter material being composed of a depth filter and a...
5273565 Meltblown fabric  
A meltblown web is composed of fibers having a narrow fiber size distribution (expressed as % coefficient of variation of the average fiber diameter) and low packing density. The web is...
5256176 Film electret and an electret filter  
A film electret and an electret filter that contain a polar high-molecular weight compound and that provides a TSDC curve having a homocharge peak temperature of at least 95° C. and a heterocharge...
5248323 Vacuum cleaner and filter thereof  
In a vacuum cleaner comprising a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary means driven by the motor for creating a vacuum in the chamber, an outlet for...