Match Document Document Title
4830643 Expanded polytetrafluoroethylene tubular container  
A container for adsorbing components present in an environment, which comprises a tubular structure of expanded, porous polytetrafluoroethylene sealed at both ends, so as to encapsulate an...
4824451 Melt-blown filter medium  
HEPA or pre-HEPA filter media are made by forming a web of melt-blown polypropylene fibers. The melt-blown process is accomplished at a low through-put of about 1 pound per inch of die width per...
4816328 Breathable, non-linting laminate  
A flexible, breathable, antistatic, non-flammable, filtering, non-linting, clean and cleanable composite laminate is provided. The laminate comprises a middle layer of a non-flammable fabric,...
4784892 Laminated microfiber non-woven material  
Non-woven material useful for example for disposable wipers and the like which comprises a layer of meltblown polymeric microfibers inter-mixed with fibres of absorbent material and/or absorbent...
4774001 Supported microporous membrane  
A supported microporous membrane comprising a composite of a microporous membrane and a synthetic thermoplastic web of microfibers secured to the membrane without the use of added adhesive...
4767426 Membrane filter tube and method of preparation  
A membrane filter which comprises a porous, self-supporting, end axially-compressible filter tube, and a microporous membrane sheet bonded to the external surface of the filter tube, the membrane...
4765812 Air laid filtering material  
Filtering media consist of formable air laid batting comprising a thermoplastic or thermosetting binder resin and a fiber mixture comprising coarse fibers, such as wood pulp and man-made fibers,...
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...
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...
4728349 Air filter medium  
An air filter medium, in which a dust-collecting layer of glass fibers of a diameter necessary for obtaining a desired dust-collecting efficiency is formed on a supporting fiber layer of low...
4711649 Air filter and method  
An air filter and method are presented whereby contaminants such as cotton dust are reduced to an acceptable level in textile mills or the like. The air filter employs an advanceable medium which...
4697462 Active cloudwater collector  
A cloud water collector is disclosed comprised of a sampler duct having a plurality of spaced Teflon strands, in the form of screens, mounted across the conduit at an acute angle facing the open...
4689059 Cleaner apparatus for toxic or hazardous substances  
The present invention relates to an apparatus for cleaning hazardous or toxic solid and liquid substances. The apparatus generally comprises a vacuum cleaner having a housing and an arrangement...
4689058 Disposable stove hood filter  
A composite stove hood filter consists of a primary metal mesh filter and a nonwoven, secondary disposable filter. The secondary filter is a low basis weight (0.2 oz./yd.2 to 1.0 oz./yd.2)...
4676807 Process for removal of liquid aerosols from gaseous streams  
Processes for the high efficiency removal liquid aerosols from gaseous streams and coalescing filters for carrying out such processes are provided. The filter comprises a porous medium having a...
4676904 Filter sheet which is free of asbestos  
A filter sheet which is free of asbestos, and which contains cellulose, filtering aids such as diatomite, perlite, etc., and cationically modified material in the form of cellulose on which are...
4668258 Gas filter  
A gas filter suitable for an ostomy bag comprises a pad impregnated with a deodorizing agent (e.g., activated carbon) and made of any open cell plastic foam material which is laminated together...
4666479 Semiconductor wafer container  
This invention relates to a semiconductor wafer container having an air filter for removing fine particles from air, which serves to allow air to pass through a body of the container. This causes...
4661132 Themally formed gradient density filter  
A fluid filter is formed by producing an air laid nonwoven batt comprising a randomly arranged mixture of thermoplastic fibers and fibers which are not thermoplastic. The batt is then cut into...
4655807 Material for gas separating membrane  
This invention provides a material for gas separating membrane comprising a fluorine-containing acrylate or methacrylate polymer or a crosslinked compound of the polymer.
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...
4642262 Method of making fibrids from thermoplastics  
Disclosed is a method of making fibrids from thermoplastics synthetics and copolymers thereof by expanding by vaporization, in the presence of a gaseous propellant, a polymer solution under...
4636231 Panel air filter  
A filter element and method for making it include the steps of providing a pleated paper filtering media and providing a batt-like filtering media containing thermoplastic fibers which is slightly...
4627863 Filter for air handling equipment  
A filter apparatus for air handling systems in which the air inlet grille of the system is provided with an additional filtration medium which extends across the full flow passage area of the...
4626266 Carburetor chamber cover device  
A carburetor chamber cover device for covering a carburetor chamber of a portable power-driven machine such as a chain saw. The carburetor chamber accommodates an air cleaner and a carburetor for...
4612237 Hydraulically entangled PTFE/glass filter felt  
A non-woven felt suitable for use as a filter comprised of poly(tetrafluoroethylene) and glass fibers hydraulically entangled to a supporting scrim and a process for making said felt are...
4608173 Filter  
A filter of a nonwoven fabric capable of removing particles from a fluid has attached to the fibers of said fabric a polymeric substance having a functional group capable of adsorbing said...
4597784 Industrial filter  
Industrial filter for separating solid particles from a streaming gaseous medium the filter having a filter insert formed from a single band of knitted fabric. The filter insert is provided with a...
4595399 Nebulization reflux concentrator  
A nebulization reflux concentrator 10 for removing trace gas contaminants from a sample gas is disclosed. Sample gas from a gas supply 40 is drawn by a suction source 42 into a vessel 11. The gas...
4595401 Air filters  
In an air cleaner employing a pleated paper filter element in the form of a frustrum of a cone mounted in a tubular air cleaner casing having a first opening axially thereof communicating with the...
RE32171 Method for the manufacture of an electret fibrous filter  
A method for the manufacture of an electrically charged fibrous filter from a highly molecular non-polar fiber material wherein a web film of the fiber material is continuously fed and stretched....
4589894 Disposable filter for a vacuum cleaner  
A vacuum cleaner disposable filter, preferably in the form of a closed container having an inlet for connection to the air discharge outlet of a vacuum cleaner, comprises an assembly of layers...
4582747 Dust-proof fabric  
A dust-proof fabric having an excellent dust-collecting efficiency and dust-preventing property including a plurality of filament yarns having a thickness of 20 to 400 denier and consisting of a...
4575385 Permeation modified gas separation membranes  
Asymmetric gas separation membranes of polymeric materials having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture,...
4557955 Shaped articles which are composed of a copolymer containing fluorine groups and which are selectively permeable to liquids and gases and are simultaneously oleophobic and oleophilic  
The invention relates to films and tubular structures which are selectively permeable to liquids and gases which are based on a copolymer composed of a copolymerized fluorinated olefin,...
4548628 Filter medium and process for preparing same  
A filter medium comprising one fibrous web or a plurality of piled and integrated fibrous webs is provided. The web or webs are composed mainly of ultra-fine combustible synthetic fibers having a...
4540625 Flexible air permeable non-woven fabric filters  
A flexible, air permeable composite highly effective as a highly absorbent fiber filter, suitable for high throughput, low pressure drop applications. The composites and filters use a non-woven...
4539113 Fluororesin filter  
A precision filter made entirely of fluororesin having both a high corrosion and high heat resistance. A plurality of tubular filtering elements are arranged in a fluororesin container. Each...
4536440 Molded fibrous filtration products  
Molded filtration products, such as disposable face masks, are prepared by assembling at least one fibrous shaping layer and one fibrous filtration layer in face-to-face contact and subjecting the...
4536439 Light weight filter felt  
Nonwoven fabrics of poly(m-phenylene isophthalamide) having a cross-machine modulus greater than 40, and good resistance to abrasion that is useful as a gas filtration substrate, and the process...
4530274 Process and apparatus for filtering spray coating particles from air  
A spray booth has a front movable wall composed of two layers of movable, flexible filter material supplied from a single continuous supply roll located adjacent the floor of the booth. The layers...
4519816 Method for the recovery of solvent vapors  
Polyurethane foams are employed to separate vapor of a volatile, organic liquid such as perchloroethylene from air or other gas containing the organic vapor. The absorbed, organic vapor can...
4512893 Porous aromatic imide polymer membrane and a process for its manufacture  
A porous aromatic imide polymer membrane usable as a gas or liquid separator or concentrator is prepared by a process comprising the steps of: (1) dissolving 3 to 30% by weight of an aromatic...
RE31849 Porous media to separate gases liquid droplets and/or solid particles from gases or vapors and coalesce entrained droplets  
Gas-vapor treating and filter mats composed of glass fibers intermixed with micro-bits of any of an expanded thermoplastic styrene-polymer or expanded thermoplastic lower polyolefin or flexible...
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...
4495030 Filter paper  
A high efficiency, toxic vapor absorptive non-woven filter material comprising a wet-laid sheet containing fibrillated binder fiber, active carbon and submicron size glass fiber.
4455195 Fibrous filter media and process for producing same  
The disclosure relates to a novel and highly superior filter media formed of random-laid, lignin-containing fibers, and to a process for manufacture of the filter media. The process involves...
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...
4444574 Partially-carbonized polyacrylonitrile filter  
A filter for extracting solids and liquids from gaseous combustion exhausts comprises a textile filter element formed of polyacrylonitrile fibers oxidized by careful heat treatment and comprising...
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...