| Patents for B01D 25 - Filters formed by clamping together several filtering elements or parts of such elements (5,131) |
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| 07/09/1991 | US5030347 Multiple filter elements with movable flushing assembly |
| 07/03/1991 | EP0434942A1 Membrane-plate for filter-presses |
| 06/12/1991 | EP0430960A1 Filtering procedure |
| 06/05/1991 | EP0430639A2 Plate and cell holder device |
| 06/04/1991 | US5021155 Membrane filter plate |
| 05/29/1991 | CN2077741U Filter added with filter-aid-agent and modified from cotten seed cake filtering machine |
| 05/28/1991 | US5019255 Device for separation of a liquid medium containing constituents which are separable in a filter |
| 05/28/1991 | CA2030884A1 Plate and cell holder |
| 05/22/1991 | EP0428037A1 Filter for eliminating pollutants |
| 05/22/1991 | CN2077324U Lightweight compound mud filter plate of ceramic mud filter press |
| 05/15/1991 | CA2029331A1 Filter for the separation of impurities or contaminants |
| 05/14/1991 | US5015379 Coiled filter strip with upstream and downstream butt ends |
| 05/08/1991 | EP0425725A1 Plate structure for liquid filtration devices |
| 05/02/1991 | EP0425028A1 Filtration apparatus |
| 04/30/1991 | US5011601 Filter plates for plate filter presses |
| 04/26/1991 | CA2028492A1 Filtration apparatus |
| 04/24/1991 | EP0423871A1 Apparatus for diaphragm filtration |
| 04/24/1991 | EP0423609A1 Stack of filters for fitting in a cross flow fluid filter device |
| 04/17/1991 | EP0422521A1 Filter press |
| 04/10/1991 | EP0420847A1 Membrane filtration apparatus and method of making a membrane filtration unit |
| 04/09/1991 | US5006265 Flushing step to prevent clogging-multiple screens for efficiency |
| 04/09/1991 | US5006241 Apparatus for shifting filter plates in a filter press |
| 04/04/1991 | WO1991004089A1 Method and device for filtering and processing fluids |
| 04/03/1991 | EP0419931A1 Plate filter press |
| 04/03/1991 | EP0419695A1 Slurry pumping apparatus |
| 03/27/1991 | CN2073770U Wave type film separating machine |
| 03/26/1991 | US5002666 Filter element and manufacture method thereof |
| 03/13/1991 | EP0416351A1 Poolfilter |
| 03/12/1991 | US4999118 Method for dewatering and drying a liquid/solid slurry and an apparatus for using the method |
| 03/07/1991 | DE4025740A1 Improving mechanical sepn. of solids in communal waste water treatment - by treating water with flocculating agent in an agitated pressure vessel and conveying by pressurised gas supply to filter press separator |
| 03/05/1991 | US4997560 Plate for a filter press |
| 02/27/1991 | CN2071974U Coal slurry thickener |
| 02/26/1991 | US4995968 Filters |
| 01/31/1991 | DE3924613A1 Feeding sludge at increasing counter-pressure by twin pumps - with transversed feeder including slider controlled to maximise total pump efficiency |
| 01/30/1991 | EP0406323A4 Apparatus for shifting and washing filter plates in a filter press |
| 01/22/1991 | US4986913 Coarse to progressively finer filter layers |
| 01/16/1991 | EP0407884A2 Device for conditioning and dewatering sludges in a filter press |
| 01/16/1991 | EP0407735A2 Method for dewatering sludges in filterpresses |
| 01/09/1991 | EP0406323A1 Apparatus for shifting and washing filter plates in a filter press |
| 01/03/1991 | DE3924938C1 Filter paper-removing device in filter press - comprises conveyance in which supports travel longitudinally, drive mechanism, restraining means, positioning means and stopping means |
| 01/02/1991 | CN2068501U Domestic mineral purifier |
| 12/26/1990 | CN1047982A Frame plate of filter press and die press process |
| 12/19/1990 | CN2067598U Loosening and tightening device for plate of filter press |
| 12/18/1990 | US4978450 Filtering element |
| 12/13/1990 | WO1990014878A1 Filter plate, filter plate element, and filter comprising same |
| 11/14/1990 | EP0397082A2 Process and apparatus for dewatering sludges and similar products |
| 10/31/1990 | DE4012972A1 Cross-flow filter for beverage - maintains raised pressure to prevent loss of carbon di:oxide content |
| 10/31/1990 | DE4012971A1 Cross-flow fluid filter - has apertured pressure distribution masks and drainage elements carrying pattern of sealing ribs |
| 10/30/1990 | US4966702 Multiple-disc type filters |
| 10/24/1990 | CN2064260U Deep bed filter type clamping board machine |
| 10/23/1990 | US4964986 Membrane filter plate |
| 10/17/1990 | EP0391895A1 Process for manufacturing fine-structured bodies. |
| 10/16/1990 | US4963258 Filter with perforated fin portions extending from outer cylindrical wall |
| 10/16/1990 | US4963255 Plate shifter for filter press |
| 10/10/1990 | CN2063434U Box type rubber diaphragm pressing filter-plate |
| 09/19/1990 | CN2062250U Filting cloth clamping device with support angle |
| 09/19/1990 | CN2062249U Diatomaceous earth filter |
| 09/11/1990 | US4956085 Filter plate, filter plate element and filter comprising same |
| 09/06/1990 | DE3906816A1 Sheet filter |
| 09/06/1990 | DE3906815A1 Filter plate for sheet filters |
| 09/05/1990 | CN2061479U Filter plate of filter press |
| 09/05/1990 | CN2061478U Continuous filtering plate thickener |
| 09/04/1990 | CA1273526A1 Apparatus for separating the liquid phase of a solid/liquid suspension |
| 08/29/1990 | EP0384081A2 Compressive and electroosmotic dehydrator |
| 08/29/1990 | CN2061078U Hand hydraulic plate frame filter press |
| 08/29/1990 | CN2061077U Electric traditional chinese medicine decoction filter press |
| 08/22/1990 | EP0383115A1 Membrane filter plate |
| 08/22/1990 | CN2060689U Sheet press-frame type filter |
| 08/22/1990 | CN2060688U Double flow type plate and frame of filter presses |
| 08/14/1990 | US4948501 Membrane filter plate |
| 08/14/1990 | US4948500 Membrane filter plate |
| 08/08/1990 | EP0381032A2 Filter body with modular elements |
| 08/02/1990 | DE3902563A1 Tension piece with band and clamping jaw on each end - consists of tension lock fitted with compression bolt |
| 07/26/1990 | DE3901851A1 Filter press and apparatus and process for drying sewage sludge |
| 07/25/1990 | EP0379054A2 Filter device |
| 07/25/1990 | EP0222779B1 Improvements to filters-presses |
| 07/18/1990 | EP0378192A2 Filter apparatus |
| 07/11/1990 | EP0377054A1 Pressure filter |
| 07/10/1990 | US4940562 Axially stacked units made of fluoropolymer |
| 07/05/1990 | DE3843250A1 Fertigformteil Finished molding |
| 06/28/1990 | WO1990006797A1 Moulding for filter plates |
| 06/28/1990 | DE3843028A1 Process and apparatus for the separation of poorly filterable suspensions in a filter press |
| 06/19/1990 | US4935136 Disk filter |
| 06/19/1990 | US4935126 Filtering apparatus |
| 06/13/1990 | DE3843575A1 Filter press |
| 06/05/1990 | US4931178 Filter cloth assembly |
| 06/05/1990 | US4931177 Composite plate for filter-presses |
| 05/31/1990 | WO1990005576A1 Separating filter for separating a pulp |
| 05/31/1990 | WO1990005574A1 Automatic pressure filter |
| 05/30/1990 | EP0370118A1 Filterapparatus for the purification of a liquid |
| 05/17/1990 | CA2003109A1 Automatic filter press |
| 05/17/1990 | CA2003108A1 Filter separator for separating a composite fluid |
| 05/16/1990 | EP0368076A2 Filtering apparatus for liquids, especially for beverages |
| 05/15/1990 | US4925570 Method of filtering |
| 05/08/1990 | CA2002553A1 Filtering apparatus for filtering liquids, in particular beverages |
| 05/03/1990 | DE3836729A1 Membrane filter plate and method of fastening the membranes |
| 04/10/1990 | CA1267515A1 Filtercloths |
| 03/29/1990 | DE3832615A1 Membrane filter plate |
| 03/28/1990 | EP0359878A1 Filter screen assembly |
| 03/28/1990 | CN2055061U Plate and frame type filter presses for automatic discharge plate and frame |