| Patents for B01D 24 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (8,047) |
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| 06/02/1999 | CN2321512Y Assembling structure for simple type water filter |
| 06/02/1999 | CN2321511Y High-efficient energy-saving water purifier |
| 05/26/1999 | EP0917900A1 Multi-stage water filter system |
| 05/26/1999 | CN2320306Y Gravity fiber filtering ponds |
| 05/26/1999 | CN1217669A Series gravity-driven liquid-filtering apparatus for filtering blood or blood product |
| 05/25/1999 | CA2104437C Method for purifying aqueous phases in hydrometallurigical extractions |
| 05/20/1999 | WO1999024142A1 Filter device and filtering process |
| 05/20/1999 | WO1999024140A1 Filter bed differential pressure monitoring system |
| 05/19/1999 | CN2319108Y 多功能滤水器 Multifunction Water Filters |
| 05/12/1999 | CN1216479A Fluid treatment media support system |
| 05/06/1999 | EP0912451A1 A method and a device for the purification of fluids |
| 05/06/1999 | CA2250558A1 Multi-stage water filter system |
| 05/04/1999 | US5900158 Precoat layer on the filter surfaces of the disc filter can be cleaned. |
| 04/29/1999 | DE19803118C1 Filter nozzle |
| 04/28/1999 | EP0844915A4 Water recovery from a septic tank |
| 04/28/1999 | CN2316015Y Open continuous type vacuum extraction filter chamber |
| 04/28/1999 | CN1214949A Permanganate feeder for iron filter |
| 04/27/1999 | US5897788 Method and apparatus for cleaning a filter drum used for thickening lime mud |
| 04/27/1999 | US5897770 Center core cartridge feeder insert |
| 04/21/1999 | EP0909207A1 Radial-flow fluidizable filter |
| 04/21/1999 | CN2315116Y Water purifier |
| 04/20/1999 | CA2006237C Device for setting and securing components for fluid flour through the floor of a filter assembly |
| 04/14/1999 | EP0908212A1 Process and device for monitoring the operatability of a filter |
| 04/14/1999 | CN2313920Y Container style water purifying supplier |
| 04/14/1999 | CN2313656Y 连续式过滤器 Continuous filter |
| 04/08/1999 | WO1999016528A1 Regenerable filter for liquids, in particular food liquids |
| 04/07/1999 | EP0673349B1 Improvements relating to plastics articles |
| 04/06/1999 | US5891335 Filtration system with traveling plenum |
| 04/01/1999 | WO1999015254A1 Low profile extruded underdrain |
| 03/25/1999 | WO1999014445A1 Device for forming a liquid-permeable flooring, manhole cover or the like |
| 03/24/1999 | EP0885045A4 Pelletized composition for treatment of storm water runoff |
| 03/23/1999 | US5885453 Device for the physicochemical separation of constituents of a fluid |
| 03/18/1999 | WO1999012628A1 Resin filter cartridge |
| 03/17/1999 | EP0836553A4 Composite particulate material and process for preparing same |
| 03/17/1999 | CN2310610Y Filtering hair ball for water treatment |
| 03/16/1999 | US5882531 Particles and water filtration with compaction |
| 03/16/1999 | US5882515 Inline filter having swivel fitting |
| 03/16/1999 | CA2108560C Fluid separation devices |
| 03/10/1999 | EP0900114A1 Fluid treatment media support system |
| 03/10/1999 | CN2310070Y Multi-stage water-purifying super-filter for office building |
| 03/10/1999 | CN2310069Y Water purifier |
| 03/10/1999 | CN2309874Y Uniform quality filter material high-speed water filter pot |
| 03/09/1999 | US5879567 Method of purifying aquarium water using a pressurized, tank mounted, fluidized bed filter |
| 03/04/1999 | WO1999010071A1 Method and plant for treating water incorporating a sedimentation tank and an multilayer filter operating at high speeds |
| 03/04/1999 | DE19744990C1 Filter functionality monitoring unit |
| 03/04/1999 | CA2294111A1 Method and plant for treating water incorporating a sedimentation tank and an multilayer filter operating at high speeds |
| 03/03/1999 | EP0898996A2 Process and device for the regeneration of filter material |
| 03/03/1999 | EP0692994B1 Method and apparatus for cleaning a filter drum used for thickening lime mud |
| 03/03/1999 | CN2309173Y Mechanical flexible filter material density adjustable efficient filter |
| 03/03/1999 | CN1042301C 转动过滤器 Turn the filter |
| 02/25/1999 | WO1999008768A1 Filtration method and device for liquid purification |
| 02/24/1999 | CN2308430Y Floatation fibre hydraulic regulating density high speed filter |
| 02/24/1999 | CN2308429Y Filtering appts. with adjustable filtering tape |
| 02/17/1999 | CN1042098C Treatment device for liquid |
| 02/16/1999 | US5871643 Rotary drum filtration apparatus with a detachable filter |
| 02/11/1999 | DE19734390A1 Swimming pool water filter |
| 02/10/1999 | CN2306822Y Bubble floating-removing type continuous sand filter |
| 02/10/1999 | CN2306821Y Combined structure of ore water filter |
| 02/03/1999 | CN2306224Y Full auto-controlled water purifier |
| 02/02/1999 | US5866019 Method for backwashing filters in a water treatment plant with clarifier and peripheral filter cells |
| 02/02/1999 | US5865999 Nozzleless underdrain for granular filtration system |
| 01/27/1999 | CN2305401Y Integrated high turbidity continuous water purifier |
| 01/27/1999 | CN2305239Y Improved structure of water filter |
| 01/27/1999 | CN1205989A Underground sewage percolating and middle water reusing technology |
| 01/27/1999 | CN1205987A Recovering treatment method for suspension in waste water during catalyst production |
| 01/14/1999 | WO1999001220A1 Water container with filter cartridge |
| 01/12/1999 | US5858232 Used for purification of water and other chemicals |
| 01/12/1999 | CA2059758C Filter device |
| 01/07/1999 | WO1999000172A1 Leukapheretic filter medium |
| 01/07/1999 | EP0888800A1 Drainage element for reversible flow filter basin |
| 01/07/1999 | DE19827623A1 Water vessel for e.g. drinks machine, comprises filter cartridge |
| 01/07/1999 | DE19728738A1 Swimming pool water filter tank |
| 01/05/1999 | US5855242 Prepacked flush joint well screen |
| 12/23/1998 | EP0885045A1 Pelletized composition for treatment of storm water runoff |
| 12/23/1998 | CN2301246Y 纤维过滤器 Fiber filters |
| 12/22/1998 | US5851389 Apparatus for removing a contaminant from a fluid stream |
| 12/16/1998 | CN1201705A Fluidized bed filtering apparatus |
| 12/09/1998 | EP0881927A1 Wastewater management system |
| 12/09/1998 | CN2299651Y Device for reclamation of waste water |
| 12/08/1998 | CA2075703C Dual chamber water filter |
| 12/02/1998 | EP0721526B1 Method and apparatus for dewatering of a fibre suspension |
| 12/01/1998 | US5843308 Wastewater management system |
| 12/01/1998 | CA2080096C Nozzleless underdrain for granular filtration system |
| 11/26/1998 | WO1998052878A1 A water purification apparatus having many functions |
| 11/26/1998 | CA2290408A1 A water purification apparatus having many functions |
| 11/25/1998 | CN2298246Y Automatic purifier |
| 11/25/1998 | CN2298243Y Self-wash type purifier |
| 11/25/1998 | CN1040842C Filter jug |
| 11/24/1998 | US5840187 Device for filtering, washing and drying a solid material-liquid mixture |
| 11/18/1998 | EP0878225A1 Apparatus and method for filtering water |
| 11/18/1998 | CN2297233Y Counter washing filter head |
| 11/18/1998 | CN2297232Y Fire resistant oil regeneration device |
| 11/11/1998 | EP0876186A1 Method and apparatus for filtering liquid or pasty substances and/or separating components therefrom |
| 11/11/1998 | CN2296755Y Device for purifying and activating water quality |
| 11/10/1998 | US5835549 For a boiling water reactor emergency core cooling system |
| 11/10/1998 | US5833867 Bed filtration system requiring periodic backwashing |
| 10/27/1998 | US5827427 Tank assembly |
| 10/25/1998 | CA2203707A1 Use of slow sand filter with recycle |
| 10/22/1998 | WO1998046534A1 Filter cartridge for gravity-fed water treatment devices |
| 10/21/1998 | EP0799083B1 Device for purifying liquids, in particular polluted water for fighting fires |