| Patents for B01D 39 - Filtering material for liquid or gaseous fluids (24,884) |
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| 02/25/1992 | US5091129 Polymerizing polyethylene with granular elements |
| 02/21/1992 | CA2035180A1 Ceramic filter and process for making it |
| 02/19/1992 | EP0471467A1 Unitary filter medium to trap organic and inorganic chemical pollutants |
| 02/19/1992 | CN2096402U Polypropylene reinforced vacuum absorption straining flat |
| 02/18/1992 | US5089299 Composite ceramic micropermeable membrane, process and apparatus for producing such membrane |
| 02/18/1992 | US5089202 Method for the production of a filter cartridge |
| 02/18/1992 | US5089134 Silica glass filter |
| 02/18/1992 | US5089092 Controlling diameters of pores by changing electrolysis voltage |
| 02/18/1992 | US5088554 Sintered metal sand screen |
| 02/18/1992 | CA1295816C Process, an apparatus and a chemical absorption filter for purifying inhaled air |
| 02/13/1992 | DE4025568A1 Ceramic yarn material used for engine exhaust particle filter - has fibre tufts or loops projecting from yarn with yarn structure reducing splitting and breaking of fibre ends |
| 02/12/1992 | EP0470659A1 Process for separating dust and organic compounds from flue gases |
| 02/12/1992 | EP0470485A2 A filter |
| 02/12/1992 | EP0470340A1 Titania substrates and fabrication |
| 02/12/1992 | EP0470186A1 A composite, porous diaphragm |
| 02/12/1992 | CN2095708U Sawdust phenolic machine oil filtering core |
| 02/11/1992 | US5087330 Anodizing aluminum substrate, changing voltage to form pores of different sizes |
| 02/11/1992 | US5087278 Filter for gas lighter and method for producing the same |
| 02/11/1992 | US5087277 High temperature ceramic particulate filter |
| 02/11/1992 | US5087273 Air freshening device |
| 02/11/1992 | US5087272 Filter and means for regeneration thereof |
| 02/05/1992 | CN1058440A 油滤纸 Oil filter |
| 02/04/1992 | US5085784 Use of cationic charge modified filter media |
| 02/04/1992 | US5085780 Water purification; using filter fibers surface treated with water soluble polymer |
| 02/04/1992 | US5085773 Anti-static fuel filter |
| 02/04/1992 | US5085766 Filter for cleaning fluids |
| 01/29/1992 | EP0468743A1 Manufacture of filter elements |
| 01/29/1992 | EP0468608A1 Draining element for the lining of wells and process for its manufacture |
| 01/29/1992 | EP0468132A2 Process for making soot filter candles |
| 01/28/1992 | US5084178 Polymeric beads |
| 01/28/1992 | CA1294790C Filter, especially coffee filter, and process for producing it |
| 01/23/1992 | WO1992001114A1 Method and apparatus for manufacturing multilayer filter material |
| 01/22/1992 | EP0467147A1 Filter or catalyst body |
| 01/22/1992 | CN2093690U Microporosity sintered composite filter pipe |
| 01/21/1992 | US5082607 Mixing ceramic powder, unsaturated compound, emulsifier, and water; curing; drying; firing |
| 01/21/1992 | US5082480 Ceramic filter |
| 01/21/1992 | US5082476 Filtration arrangement and method |
| 01/17/1992 | WO1992001498A2 Solid-phase precipitation assay device and method |
| 01/15/1992 | EP0466381A1 Process for producing precision cartridge filter |
| 01/15/1992 | EP0466215A2 Filter for liquid metals, based on alveolar ceramic material, process for the production thereof, and its use in filtering liquid metals or alloys having high melting points |
| 01/14/1992 | US5080847 Polyethersulfone, polysulfone, polythioether |
| 01/14/1992 | US5080790 Zig-zag folds for gas, liquid filtration |
| 01/14/1992 | US5080702 Disposable two-ply filter |
| 01/10/1992 | WO1992000799A1 Substance carrying conglomerate |
| 01/09/1992 | WO1992000253A1 Aluminum borate ceramics and process for producing same |
| 01/08/1992 | EP0465424A1 Thick filterbed, process for preparing a filterlayer and filtration module |
| 01/02/1992 | EP0463927A1 Process for obtaining highly porous charred diatomaceous filtrating agents free of cristobalite and filtrating agents thus obtained |
| 01/02/1992 | EP0463234A1 Coated molten metal filters |
| 01/02/1992 | EP0463143A1 Filter material for motor vehicles. |
| 01/02/1992 | DE4020427A1 Adsorbent impregnated fabric filter - with low flow resistance, suitable for compact air conditioner units |
| 12/31/1991 | US5077114 Heat resistant nondeforming membrane for filtering exhaust gases, microorganisms dialysis |
| 12/31/1991 | US5075990 Battery separator fabric method for manufacturing |
| 12/31/1991 | CA1293691C Well bore device for sand control |
| 12/26/1991 | WO1991019681A1 A flow control element for use as a filter or gas diffuser |
| 12/24/1991 | US5075160 Ceramic fiber reinforced filter |
| 12/24/1991 | US5074896 Cartridge device for gas filtration |
| 12/24/1991 | CA1293520C Ceramic foam filter and process for preparing same |
| 12/23/1991 | CA2031136A1 Coated molten metal filters |
| 12/17/1991 | US5073432 Honeycomb structure and method of producing the same |
| 12/17/1991 | US5073178 Ceramic filter for a dust-containing gas and method for its production |
| 12/17/1991 | CA1293098C Manufacture of tobacco smoke filters |
| 12/17/1991 | CA1293094C Resilient shape-retaining fibrous filtration face mask |
| 12/12/1991 | WO1991018660A1 Method for producing high solids slurries of clay water products |
| 12/11/1991 | EP0460499A2 Method for the filtration of beverages and of chemical, pharmaceutical and similar liquids |
| 12/11/1991 | CN1056805A Nonwoven filter and method of manufacture |
| 12/10/1991 | US5071457 Composite for filtering hot gas and method of its manufacture |
| 12/03/1991 | US5069799 Series of chemically active, physically active and inactive fi lters |
| 12/03/1991 | US5069697 Cordierite as main component of crystalline phase |
| 12/03/1991 | CA1292703C Filtration with biogenetic silica |
| 11/27/1991 | CN1056439A Filter core for whole flow depth purifier of lubricating oil |
| 11/21/1991 | EP0457611A2 Beer filtrating apparatus |
| 11/21/1991 | EP0457183A1 Device and its use in the separation of plasma from blood |
| 11/21/1991 | DE4016253A1 Domed sieve element mfr. for heat exchanger - esp. useful in cooling water filter unit by deforming flat metal plate into conical cap shape and forming sieve holes |
| 11/20/1991 | CN1056258A Artificial earth technology for fast filtering urban sewage and filter material-artificial earth |
| 11/19/1991 | US5066432 Process for manufacturing a ceramic foam body |
| 11/19/1991 | CA1292114C Fluid-permeable article and method for producing the same |
| 11/13/1991 | EP0455645A1 Irradiated expanded polytetrafluoroethylen composites, and devices using them, and processes for making them. |
| 11/13/1991 | CN2088450U Arc curved screen plate |
| 11/13/1991 | CN1056062A Saw dust phenolic machine oil filter core and its making method |
| 11/12/1991 | US5064609 Hydrogen reducing atmosphere, jigs |
| 11/12/1991 | US5064598 Process and apparatus for manufacturing a pleated filter insert |
| 11/12/1991 | US5064542 Cylindrical filter to trap fibrin |
| 11/12/1991 | US5064541 Devices and methods for the collection of a predetermined volume of plasma or serum |
| 11/12/1991 | US5064537 Seamless screen cylinder with laser cut openings |
| 11/12/1991 | US5064459 Filter arrangement for airbag gas generators |
| 11/06/1991 | EP0455492A1 Filters for polymer spinneret assemblies and their manufacture |
| 11/05/1991 | WO1991017297A1 Nonwoven filter and method of manufacture |
| 11/05/1991 | US5063007 Process for manufacturing a ceramic foam body |
| 11/05/1991 | US5062911 Preparation of ceramic honeycomb structure having selectively sealed channels |
| 11/05/1991 | CA2082058A1 Nonwoven filter and method of manufacture |
| 11/05/1991 | CA1291713C Hydraulically entangled ptfe/glass filter felt |
| 10/31/1991 | WO1991016119A1 Non-woven element comprised of fibrid binder |
| 10/30/1991 | EP0454213A1 Gas cushion for an air bag system |
| 10/30/1991 | CN1055769A Apparatus for refining molten metal with ceramic filter |
| 10/29/1991 | US5061544 Differentiation in pore size; dimensional stability upon heat treatment; used as separation membrane |
| 10/29/1991 | US5060664 Method of and apparatus for making streams containing fibrous materials of the tobacco processing industry |
| 10/29/1991 | CA1291587C Porous fibrous fluorocarbon structures |
| 10/26/1991 | CA2040938A1 Gas bag for airbag systems |
| 10/24/1991 | DE4110117A1 Gas and fluid filter element which can be automatically exchanged - comprises gas or fluid-permeable circular section sepd. from surrounding impermeable material by impermeable margin |
| 10/24/1991 | DE4101658A1 Filtermaterial fuer kraftfahrzeuge Filter material for motor vehicles |