| 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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| 08/09/1994 | CA1331346C Water purification device with an intake-funnel |
| 08/03/1994 | EP0608441A1 High speed upward flow filtration apparatus |
| 08/03/1994 | CN2173104Y Self-suction type air water combined washing machinery filter |
| 07/26/1994 | US5332497 Nozzleless underdrain for granular filtration system |
| 07/21/1994 | WO1994015694A1 Method and device for removing liquid on a gauze conveyor and hollow roll comprising a tube for use in such a device |
| 07/21/1994 | CA2152343A1 Method and device for removing liquid on a gauze conveyor and hollow roll comprising a tube for use in such a device |
| 07/20/1994 | CN2172279Y Household diatomaceous earth water purifier |
| 07/20/1994 | CN2172054Y Purifying drinking tube |
| 07/13/1994 | CN2171403Y Multi-stage homogeneity anti-grading filter |
| 07/12/1994 | US5328608 Mutli-lateral filter underdrain block |
| 07/12/1994 | US5328605 Filter module |
| 07/07/1994 | WO1994014516A1 Flush water outlet valve |
| 07/07/1994 | DE4319791A1 Assembly for separation of solids from solid-liquid mixture has irregular separation surface |
| 07/06/1994 | CN2170796Y Water strainer |
| 06/28/1994 | US5324431 Process for treating suspended substances in liquor |
| 06/28/1994 | CA1330460C Process for treating organic waste water |
| 06/23/1994 | WO1994013381A1 Removal of impurities |
| 06/23/1994 | CA2151367A1 Removal of impurities |
| 06/22/1994 | CN2169466Y Valveless filter pot adjustable damp automatically stop water and air damping device |
| 06/21/1994 | US5322629 Method and apparatus for treating storm water |
| 06/21/1994 | US5322625 Filter element for a gravity-flow water filter |
| 06/21/1994 | CA1330312C Quick change filter cartridge and head therefor |
| 06/14/1994 | US5320752 Water purification system employing modular flat filter assembly |
| 06/14/1994 | US5320750 Water clarifier with first filtrate isolation, improved backwashing and improved bubble generation |
| 06/09/1994 | WO1994012261A1 A suction head arranged between a filtrate channel and a barometric leg of a rotating filter |
| 06/08/1994 | CN2167770Y Seawater pressure filter |
| 06/08/1994 | CN1087605A Combined mineral water purifying material |
| 06/01/1994 | DE4335104A1 Purification of spring- and well-water - before filtration raw water mixes with pressurised water contg. gas where resulting bubbles assist sepn. of impurities by flotation |
| 06/01/1994 | CN2167088Y Sewage purification equipment |
| 06/01/1994 | CN2166868Y Filtering material for water purifier |
| 05/26/1994 | WO1994011082A1 Pleated filter assembly, and the method and apparatus for making |
| 05/26/1994 | DE4239293A1 Plastics filter nozzle esp. for swimming pool filter - permits assembly from above filter plate |
| 05/25/1994 | CN1087027A Treatment device |
| 05/24/1994 | US5314630 Backwashing gravel filter used in water treatment |
| 05/18/1994 | EP0597309A1 Method of purification of a filter material used for cleansing of liquids |
| 05/18/1994 | CN2164896Y Solid-liquid and oil-water separator |
| 05/18/1994 | CN2164891Y Condensed water carbon fibre filter |
| 05/17/1994 | CA1329556C Universally adaptable pool water filter structure |
| 05/11/1994 | WO1994009881A1 Filter apparatus for machine tool coolant |
| 05/11/1994 | CN2164309Y Polypropylene needle punching fibre filter core |
| 05/11/1994 | CA2147853A1 Filter apparatus for machine tool coolant |
| 05/03/1994 | US5308487 Device for separating liquid and solid material out of a mixture |
| 05/03/1994 | US5308479 Sewage disposal apparatus employing circulating filter media |
| 04/28/1994 | WO1994008693A1 Process and device for removing deposits from filter auxiliaries |
| 04/27/1994 | EP0594302A1 Cap system for underdrains in gravity filters |
| 04/26/1994 | US5306422 Compact clarifier system for municipal waste water treatment |
| 04/19/1994 | US5304305 Filter for fluids |
| 04/19/1994 | CA1328628C Filter cover for a purification insert in a water treatment device with a hollow tube |
| 04/19/1994 | CA1328627C Filter media for filter systems |
| 04/06/1994 | EP0591124A1 Device and method for drying sludge |
| 04/06/1994 | EP0590705A1 Cleaning apparatus for contaminated liquids comprising a measuring appliance |
| 03/30/1994 | CN1084423A Method and apparatus for treatment of circulating cooling water in air-conditioning system |
| 03/24/1994 | DE4231582A1 Sewage cleaning filter - has at least two filter units for sewage gravity flow in a housing with back rinsing jets for cleaning in raw sewage path to initial drainage |
| 03/22/1994 | US5296138 Underdrain for liquid purification systems |
| 03/22/1994 | CA2106448A1 Cap system for underdrains in gravity filters |
| 03/16/1994 | EP0586805A2 Filter for pond water |
| 03/16/1994 | EP0340240B1 Filter apparatus and method |
| 03/15/1994 | US5294337 Water filtration system |
| 03/15/1994 | CA1327757C Continuous washed sand filter and washer |
| 03/09/1994 | EP0585418A1 Method and device for separating a suspension, preferably a fibre suspension. |
| 03/08/1994 | US5292436 Tapered bed filtration apparatus |
| 03/08/1994 | CA1327653C Device and a method for filtering a liquid with wood ash to remove impurities therefrom |
| 03/03/1994 | WO1994004245A1 Filter jug |
| 03/03/1994 | WO1994004244A1 Loading control system for a cyclical centrifugal machine |
| 03/03/1994 | CA2142362A1 Filter jug |
| 03/02/1994 | CN2157818Y Active moving dielectric sieve |
| 03/01/1994 | US5290458 Granular media regeneration process |
| 03/01/1994 | US5290457 Filter element with regenerable bulk material filling and method for making same |
| 02/23/1994 | CN2156922Y Pulp separator |
| 02/23/1994 | CN2156921Y Small water purifier |
| 02/22/1994 | US5288399 Gravity flow filter with backwash control chamber |
| 02/22/1994 | US5288398 Filter bed backwashing devices and methods |
| 02/17/1994 | WO1994003401A1 Waste water treatment |
| 02/17/1994 | WO1994003255A1 Filter underdrain module and underdrain system |
| 02/17/1994 | WO1994003254A1 Treatment device |
| 02/17/1994 | WO1994003250A1 Process and apparatus for removing bottoms from a mixture |
| 02/17/1994 | CA2120612A1 Filter underdrain module and underdrain system |
| 02/16/1994 | CN2155932Y Health care water purifier |
| 02/15/1994 | US5286392 Filtration system having reduced loss of filter particles during backwashing, for waste water treatment |
| 02/15/1994 | CA1327024C Fluid filter |
| 02/09/1994 | EP0582007A1 Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system |
| 02/03/1994 | WO1994002230A1 Air-liquid separator assembly and system |
| 02/02/1994 | EP0581710A1 Wash-water trough for washing filters in biological water treatment |
| 02/01/1994 | CA2101665A1 Chute type filter washing device for biological treatment of water |
| 01/27/1994 | DE4241278A1 Sieve-type floor or intermediate floor - comprising individual floor plates fitted on base surface via legs as distance holders |
| 01/26/1994 | EP0579798A1 Liquid filtration module and apparatus. |
| 01/26/1994 | EP0400096B1 Filter element and filtration process |
| 01/26/1994 | CN2154115Y Two-purpose water treatment apparatus |
| 01/26/1994 | CN2154113Y Lever blance water-supply filter |
| 01/26/1994 | CN2154112Y Multifunction miniature water treatment device |
| 01/26/1994 | CN2154111Y Dividing defluorine (arsenic) apparatus |
| 01/25/1994 | US5281332 System for treating sewage or other fluids |
| 01/20/1994 | WO1994001194A1 Deep bed sand filter |
| 01/12/1994 | EP0577660A1 Filter for liquids, in particular internal-combustion engine lubricant oils. |
| 01/11/1994 | US5277829 Deep bed sand filter |
| 01/11/1994 | US5277828 Cleaning, sterilization |
| 01/11/1994 | US5277805 Rechargeable water filter |
| 01/05/1994 | EP0576602A1 A device and a method for separating liquid samples. |
| 12/29/1993 | EP0575315A1 Slotted scallops or similar articles and method of making same. |
| 12/29/1993 | CN2150914Y Vortex gravel filter |