| Patents for B01D 33 - Filters with filtering elements which move during the filtering operation (10,149) |
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| 03/06/1990 | US4906364 Filter deck assembly sliding seal |
| 03/06/1990 | CA1266443A1 Filtration method and apparatus |
| 02/28/1990 | EP0356415A2 Backflushing pressure diffuser screens |
| 02/28/1990 | EP0355285A2 Suspension separator |
| 02/27/1990 | US4904394 Method for selective filtering of a fluid using porous piezoelectric material |
| 02/20/1990 | US4902410 Interceptor for the continuous removal of solid matter from a mixture of solids and liquid |
| 02/20/1990 | CA1265954A1 Filter belt press |
| 02/15/1990 | DE3925326A1 Vorrichtung zum pressen und entwaessern bzw. filtrieren Pressing apparatus for dewatering and or filter |
| 02/15/1990 | DE3826273A1 Process and device for isolating a solid from a suspension |
| 02/14/1990 | EP0354390A1 Trough-like filter plate for rotating pressure filters, and method for its production |
| 02/14/1990 | CN1039580A Method for recovering crystals from crystal-containing slurry |
| 02/13/1990 | US4900440 Dynamic pressure filter |
| 02/13/1990 | US4900430 Screen cleaning in CIL and CIP systems |
| 02/13/1990 | US4900400 Arrangement for liquid treatment of pulp |
| 02/08/1990 | WO1990000924A1 A trough-shaped filter-plate for a rotary pressure filter and a process for making it |
| 02/08/1990 | DE3826206A1 Process for screening or filtering drinking waters, service waters and waste waters |
| 02/07/1990 | EP0353340A1 Filtering device for purifying cooling lubricants |
| 02/07/1990 | EP0353314A1 Process and installation for the purification of waste water containing emulsified fat, and discharging device |
| 01/31/1990 | EP0352320A1 Thickener. |
| 01/31/1990 | EP0352272A1 Arrangement for an inlet pipe in a rotating drum sieve. |
| 01/30/1990 | US4897193 Quantitative separation; immunoassays |
| 01/30/1990 | US4897192 Rotary filtration device |
| 01/30/1990 | CA1265065A1 Filter apparatus and method |
| 01/24/1990 | EP0351629A2 Process and device for separating and keeping various solvents separated |
| 01/23/1990 | US4895653 Flooded bottom distribution system |
| 01/23/1990 | US4895647 Filtering apparatus |
| 01/23/1990 | CA1264679A1 Disc filter element for a rotatable disc filter |
| 01/17/1990 | EP0350761A2 Drum separator for cooling lubricants |
| 01/11/1990 | DE3823015A1 Filter |
| 01/09/1990 | US4892656 Vacuum filter with releasably clamped sealing strip |
| 01/09/1990 | US4892652 Curved diverter plate assembly for interchangeability of various models of traveling water screens |
| 01/03/1990 | CN1038410A Radiation-type vacuum continuous filter using internal filtering in rotating drum |
| 01/02/1990 | US4891134 Sample filtration device |
| 12/28/1989 | DE3821647A1 Wet-screening machine |
| 12/27/1989 | EP0348164A2 Sealing arrangement for a rotatable drum in a vat |
| 12/26/1989 | US4889629 Filter panel with parallel passages and mechanical filter screen comprising same |
| 12/26/1989 | US4889625 Filter for concentrating suspensions |
| 12/20/1989 | CN1038029A Method and device for removing liquid from mixture of solids and liquids |
| 12/19/1989 | US4888110 Filtering device for thermoplastic material |
| 12/14/1989 | WO1989011903A1 A method and a device for the separation of bodies from a liquid |
| 12/14/1989 | WO1989011902A1 Slurry filtering apparatus |
| 12/14/1989 | DE3818946A1 Method for operating a drum screening machine |
| 12/12/1989 | US4886608 Apparatus and method for separating liquids and solids |
| 12/06/1989 | EP0344152A1 Process and installation for dewatering waste water sludge. |
| 12/05/1989 | US4885088 Filter belt press |
| 12/05/1989 | CA1263611A1 Rotary plow assembly |
| 12/05/1989 | CA1263610A1 Raisable plow assembly |
| 11/30/1989 | WO1989011323A1 Process for recovering crystals from slurry |
| 11/30/1989 | DE3817948A1 Apparatus for separating off sediment from a liquid, in particular flocculated precipitates from waste waters |
| 11/30/1989 | DE3817922A1 Process and apparatus for filtering off solid substances from liquids |
| 11/29/1989 | EP0343393A2 Multiscreen pressure diffuser |
| 11/29/1989 | EP0165992B1 Filtration method and apparatus |
| 11/28/1989 | CA1263319A1 Micro-strainers for use in water purification |
| 11/23/1989 | EP0289486B1 Filter |
| 11/21/1989 | US4882054 Vibratory screening machine with tiltable screen frame and adjustable discharge weir |
| 11/21/1989 | US4881286 Effective diffuser/thickener screen backflushing |
| 11/16/1989 | DE3815316A1 Device for dewatering on a twin-wire former |
| 11/14/1989 | US4880540 Pulp screening apparatus |
| 11/09/1989 | DE3914213A1 Geschuetzte dichtungsanordnung und schutzfilter fuer die dichtung Protected seal arrangement and protection filter for the seal |
| 11/09/1989 | DE3814373A1 Filter, in particular for liquids |
| 11/07/1989 | US4879049 Method of removal of polycyclic aromatic hydrocarbons from a liquid |
| 11/07/1989 | US4879034 Dewatering device with two filtering belts |
| 11/07/1989 | US4879033 Slurry plow |
| 11/02/1989 | EP0339572A2 Decker and method for separating filtrate from a mass to be thickened |
| 11/02/1989 | EP0339429A2 Filter and dispenser vial and use thereof |
| 11/02/1989 | DE3840154C1 Device for cleaning vessels |
| 10/31/1989 | US4877595 Rotary vacuum filter equipped with a pressing band |
| 10/25/1989 | EP0338626A2 Method and device for removing liquid from a mixture of solids and liquids |
| 10/24/1989 | US4876013 Small volume rotary filter |
| 10/19/1989 | DE3811932A1 Filter Filter |
| 10/18/1989 | EP0337218A2 Process and dewatering device of mud |
| 10/18/1989 | EP0336933A1 Filter for liquids. |
| 10/17/1989 | US4874468 Apparatus for the liquid treatment of a fibrous board between two endless foraminous belts or wires |
| 10/12/1989 | EP0277227A4 Pivot pin bearing/seal with loose eyelet especially suited for disposable continuous flow blood filtration system cartridges. |
| 10/11/1989 | EP0336602A2 Centrifuge and method of drying wet particulate matter |
| 10/10/1989 | US4872988 Method and device for separation of colloidal suspensions |
| 09/28/1989 | DE3809372A1 Filter |
| 09/28/1989 | DE3808968A1 Filter apparatus |
| 09/26/1989 | US4869823 Rotary drum type solid-liquid separation apparatus |
| 09/26/1989 | CA1261559A1 Sewer and catch basin cleaner with self-cleaning feature and method of use thereof |
| 09/26/1989 | CA1260848A1 Apparatus for retrieving solid material from a separation medium |
| 09/19/1989 | US4867886 Method and apparatus for controlling sludge flocculant flow |
| 09/19/1989 | US4867879 Pipeline sieve with a suction removal device |
| 09/19/1989 | US4867878 Liquid bearing for rotary apparatus |
| 09/19/1989 | US4867870 Apparatus for spray shower maintenance |
| 09/19/1989 | CA1259571A1 Rotating disc filter |
| 09/13/1989 | EP0331825A1 Filter band cleaning device |
| 09/12/1989 | US4865732 Supported mesh filter leaf bag with embedded rope closure |
| 09/08/1989 | WO1989007972A1 Method and apparatus for removing liquid from permeable material |
| 09/06/1989 | EP0331020A2 Filtering device for the filtration of liquids |
| 09/05/1989 | US4863656 Microporous plate and method for manufacturing the same and suction drier apparatus |
| 09/05/1989 | CA1259033A1 Apparatus for separation and transportation of solid from liquid |
| 08/31/1989 | DE3806582A1 Drum filter |
| 08/30/1989 | EP0329804A1 Vacuum filter with detachable jammed sealing tape |
| 08/30/1989 | EP0221991B1 A device for collecting and discharging solid particles carried by flowing water |
| 08/30/1989 | CN2043523U All-hydraulic alkali-filter |
| 08/29/1989 | US4861495 Press belt device for horizontal filters |
| 08/23/1989 | EP0328548A1 Arrangement for an inlet and outlet in a rotating drum sieve |
| 08/17/1989 | DE3803590A1 Scrapers for rotating edge screen drums |
| 08/15/1989 | US4857210 Method and apparatus for prevention of blinding of centrifuge filter screens |