| Patents for B01D 25 - Filters formed by clamping together several filtering elements or parts of such elements (5,131) |
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| 03/27/1990 | US4911842 Elongated perforated hollow core; endless loop of filter web |
| 03/27/1990 | US4911839 Recessed filtering zone; sealing zone |
| 03/27/1990 | CA1267032A1 Filter press |
| 03/27/1990 | CA1267018A1 Method of making a seamless dish-shaped diaphragm from sheet material |
| 03/21/1990 | EP0358976A2 Filter plate for filter press filtering elements |
| 03/20/1990 | US4909929 Interlocking clamping system |
| 03/08/1990 | WO1990001981A1 Filter plate, filter plate element and filter comprising same |
| 03/07/1990 | EP0357015A2 Membrane filter press plate for filter presses |
| 03/07/1990 | CN2053943U Liquid collecting and dregs discharging device for plate and frame type filter |
| 03/06/1990 | US4906373 Multiple filter elements with movable flushing assembly |
| 02/22/1990 | WO1990001361A1 Filtering procedure |
| 02/13/1990 | US4900454 High speed cleaning of vertically suspended, horizontally moveable filter cloths by vibrating |
| 02/13/1990 | US4900436 Apparatus for cake removal in a filter press |
| 02/01/1990 | DE3825433A1 Sealing frames of adjacent filter press cells - against solids entry by resilient strips projecting from recesses in frame surface |
| 01/30/1990 | US4897190 Membrane filter plate |
| 01/30/1990 | CA1265066A1 Multiple-disc type filters |
| 01/10/1990 | EP0350338A2 Filter element and method of manufacture therefore |
| 01/09/1990 | US4892665 Porous bags mounted on frames can be filled with material, pressed between moveable platens, and dumped alternately; continuous processing |
| 01/09/1990 | US4892657 Filtration |
| 01/03/1990 | EP0348784A1 Method of dessalting swellable silicate layers |
| 01/02/1990 | US4891117 Method and apparatus for installing gasket members between flat plate structures |
| 12/28/1989 | WO1989012602A1 Process for removing salts from expandable laminaed silica |
| 12/27/1989 | EP0347477A1 Filtering apparatus |
| 12/20/1989 | CN2049553U Plate type filter |
| 12/07/1989 | DE3807509A1 Apparatus for filtering flowable material to be filtered |
| 12/06/1989 | EP0344797A2 Sealing means for the filter plates of a filter press adapted to the filtration of liquid cocoa paste |
| 12/06/1989 | CN2048777U Filter-press plate and frame embeded with sealing ring |
| 11/28/1989 | US4883592 Filter Press |
| 11/28/1989 | CA1263320A1 Filter means with a segmental construction |
| 11/23/1989 | DE3816886A1 Plate filter press |
| 11/21/1989 | US4882050 Filter plate, filter plate element, and filter comprising same |
| 11/21/1989 | US4882049 Apparatus for shifting and washing filter plates in a filter press |
| 11/09/1989 | DE3814397A1 Device for receiving the filter cake discharged from at least one filter press and for transporting the received filter cake to a transfer station |
| 11/08/1989 | CN2047193U Micro and super dual-purpose membrane filter |
| 10/24/1989 | US4876007 Plate-type filter cartridge with internal support |
| 10/18/1989 | EP0337218A2 Process and dewatering device of mud |
| 10/17/1989 | US4874512 Filter press cloth hanger |
| 10/03/1989 | US4871457 Disk filter |
| 10/03/1989 | US4871456 Stacked filter cartridge with porous filter support |
| 09/27/1989 | EP0333890A1 Improved paper extractor for plate filter |
| 09/27/1989 | EP0333762A1 Apparatus for shifting filter plates in a filter press |
| 09/26/1989 | US4869834 Method and apparatus for controlling run of a moving web in a predetermined path, especially a filter material web, through a plate filter |
| 09/21/1989 | WO1989008490A1 Apparatus for shifting and washing filter plates in a filter press |
| 09/19/1989 | US4867876 Filter plate, filter plate element, and filter comprising same |
| 09/19/1989 | CA1259570A1 Filter cloth hanging apparatus for filter press |
| 08/30/1989 | CN2043522U Extrusion filter plate frame |
| 08/29/1989 | US4861494 Automatic cycle control arrangement and method for a pressure filter |
| 08/15/1989 | US4857192 In phase corrugated plate membrane module support |
| 08/10/1989 | DE3820206C1 Process for monitoring of automatically operated plate filter presses |
| 08/08/1989 | US4855062 Determining compression force as control variable |
| 08/03/1989 | DE3802190A1 Filter element and process for the production of filter elements |
| 08/01/1989 | US4853121 Chamber filter press |
| 07/26/1989 | EP0324866A1 Rotor for a filter press |
| 07/26/1989 | EP0324865A1 Filterpress |
| 07/13/1989 | WO1989006155A1 Method for pressure filtering and device for carrying out same |
| 07/05/1989 | EP0323450A2 A method of bonding, in particular for a filter cloth assembly |
| 07/05/1989 | EP0323449A2 A method of bonding, in particular for a filter cloth assembly |
| 07/05/1989 | EP0322604A1 Membrane filtration apparatus and method of making a membrane filtration unit |
| 07/04/1989 | US4844806 Multiple-disc-filters |
| 07/04/1989 | US4844803 Filter press with a plurality of membrane filter plates |
| 06/27/1989 | US4842733 Filter plate of filter press |
| 06/22/1989 | DE3741552A1 Filter module |
| 06/15/1989 | WO1989005181A1 Membrane filtration apparatus and method of making a membrane filtration unit |
| 06/13/1989 | US4839045 Thermoplastic filter plate for a filter press |
| 06/08/1989 | DE3744771A1 Device for expressing gaseous and/or liquid media out of bulk and/or pourable materials |
| 06/07/1989 | EP0318872A2 Device for the separation of gaseous and/or liquid matter from bulk or flowable material |
| 05/23/1989 | US4832840 Membrane filter plate having improved bending characteristics of the membrane |
| 05/18/1989 | WO1989004204A1 Procedure for the cleansing of the filter cloth of a box filter, and a box filter applying the procedure |
| 05/18/1989 | DE3736225A1 Chamber filter disc and membrane filter disc and process for the production thereof |
| 05/17/1989 | CN1032907A Self-washing filter and water purifying apparatus |
| 05/16/1989 | US4830749 Liquid waste filtering apparatus |
| 05/10/1989 | CN2037255U Squeezing film filter plate |
| 05/03/1989 | EP0313553A1 Rotary disc filter |
| 05/02/1989 | US4826607 Filter cake |
| 05/02/1989 | US4826593 Membrane filter press |
| 04/25/1989 | US4824564 Dry sump liquid filter |
| 04/25/1989 | US4824542 Filter press structure or cell and method of assembling same |
| 04/20/1989 | DE3733971A1 Paper filter for filtering liquids |
| 04/12/1989 | EP0310755A1 High pressure filter press comprising spray cleansing means |
| 04/12/1989 | EP0310706A1 Membranes for plates of filter presses |
| 04/05/1989 | EP0310385A2 Filter plate, filter plate element, and filter comprising same |
| 04/05/1989 | CN2035266U Bag type filter press |
| 03/28/1989 | US4816147 Filter press-type filtering apparatus using rigid filter element |
| 03/23/1989 | WO1988005335A3 Filtering apparatus for contaminated fluids |
| 03/22/1989 | EP0307772A2 Filter press and spraying device for the filterplates |
| 03/15/1989 | CN1031659A Filter press cloth hanger |
| 03/08/1989 | EP0306150A2 Filter press cloth hanger |
| 03/07/1989 | US4810380 Filter paper for an edge-type filter |
| 03/01/1989 | EP0304597A1 Process for automatically controlling the movement of a filter band and use of the process in a plate filter |
| 02/21/1989 | US4806239 Apparatus for shifting filter plates in a filter press |
| 01/31/1989 | US4801382 Filter means with a segmental construction |
| 01/25/1989 | CN2031306U Filting plate for filter press |
| 01/24/1989 | CA1249227A1 Filter press with stacked filter assemblies and filter layers |
| 01/18/1989 | EP0299035A1 Filtering apparatus for contaminated fluids |
| 01/05/1989 | DE3830157A1 Cross-flow filter module for treating liquids and gases |
| 12/29/1988 | DE3819047A1 Plate for filter presses |
| 12/28/1988 | CN88211573U Single flow press filtering plate frame |
| 12/28/1988 | CN88211495U Continuously concentrating separator |
| 12/27/1988 | US4793928 Polymer filtering apparatus |
| 12/27/1988 | US4793922 Filter element using non-woven mat and multi finger separators |